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Journal articles on the topic 'Reactive powder concrete'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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1

Kannangara, Thathsarani, Maurice Guerrieri, Sam Fragomeni, and Paul Joseph. "A Study of the Residual Strength of Reactive Powder-Based Geopolymer Concrete under Elevated Temperatures." Applied Sciences 11, no. 24 (December 13, 2021): 11834. http://dx.doi.org/10.3390/app112411834.

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This paper reports on studies relating to the unstressed residual compressive strengths of geopolymer pastes that are heated up to 800 °C, behavior of reactive powder concrete before and after exposure to elevated temperatures and thermal behavior of novel reactive powder geopolymer-based concretes. For this purpose, 10 geopolymer pastes and three reactive powder concrete mixtures were tested for residual strengths. Gladstone fly ash was used as the primary binder for both geopolymer pastes and reactive powder geopolymer concretes. In addition, four novel reactive powder geopolymer concrete mixes were prepared with zero cement utilization. While reactive powder concretes achieved the highest seven-day compressive strengths of approximately 140 MPa, very poor thermal behavior was observed, with explosive spalling occurring at a temperature of ca. 360 °C. The reactive powder geopolymer concretes, on the other hand, displayed relatively high thermal properties with no thermal cracking at 400 °C, or visible signs of spalling and very mild cracking in one case at 800 °C. In terms of the strength of reactive powder geopolymer concrete, a maximum compressive strength of approximately 76 MPa and residual strengths of approximately 61 MPa and 51 MPa at 400 °C and 800 °C, respectively, were observed.
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2

Sanjuán, Miguel Ángel, and Carmen Andrade. "Reactive Powder Concrete: Durability and Applications." Applied Sciences 11, no. 12 (June 18, 2021): 5629. http://dx.doi.org/10.3390/app11125629.

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Reactive powder concrete (RPC) is an ultra-high-performance concrete (UHPC) developed years ago by Bouygues, with the aim to build strong, durable, and sustainable structures. Some differences can be underlined between the RPC and high-performance concrete (HPC); that is to say, RPC exhibits higher compressive and flexural strength, higher toughness, lower porosity, and lower permeability compared to HPC. Microstructural observations confirm that silica fume enhances the fiber–matrix interfacial characteristics, particularly in fiber pullout energy. This paper reviews the reported literature on RPC, and it offers a comparison between RPC and HPC. Therefore, some RPC potential applications may be inferred. For instance, some examples of footbridges and structural repair applications are given. Experimental measurements on air permeability, porosity, water absorption, carbonation rate, corrosion rate, and resistivity are evidence of the better performance of RPC over HPC. When these ultra-high-performance concretes are reinforced with discontinuous, short fibers, they exhibit better tensile strain-hardening performance.
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3

Kushartomo, Widodo, and Octavivia. "Durability of Reactive Powder Concrete." IOP Conference Series: Materials Science and Engineering 650 (October 30, 2019): 012028. http://dx.doi.org/10.1088/1757-899x/650/1/012028.

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4

Śliwiński, J., and T. Zdeb. "Reactive Powder Concrete as a Polymer Modified Concrete." Restoration of Buildings and Monuments 18, no. 3-4 (August 1, 2012): 161–68. http://dx.doi.org/10.1515/rbm-2012-6522.

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5

Haido, James H., Youkhanna Z. Dinkha, and Badorul H. Abu-Bakar. "Slant shear strength of hybrid concrete made with old and new parts using reactive and inert waste powders." Academic Journal of Nawroz University 7, no. 4 (December 21, 2018): 236. http://dx.doi.org/10.25007/ajnu.v7n4a296.

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Manufactured reactive powders, as a silica fume, are usually used in production of high strength concrete with for retrofitting purposes of concrete structures. The efficiency of inert waste glass powder in hybrid concrete fabrication has not been widely investigated, thus further studies are essentially considered in this area. In the present study, hybrid concrete prisms with size of 10x10x30 cm have been made with old ordinary concrete (OC) and new high strength concrete (HSC). High strength of new concrete part of these prisms is achieved via using of waste glass powder, silica fume and mixture of them. The roughness of interfacial surface between old and new parts of hybrid concrete is improved in various manners with utilizing sand blast, holes and grooves. Performance of these elements has been measured in terms of slant shear strength and mode of failure. The results have been shown that there is a relatively similar strength with using retrofitted concrete made with the used powder which includes silica fume, glass powders, and their mixture, the mixture of both powders, namely, silica fume and waste glass powders is regarded a best choice in the present stud. It is demonstrated also that the grooved interface between old and new concretes induces proper strength equivalent to 89% of control concrete prisms strength.
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6

Grzeszczyk, Stefania, and Aneta Matuszek-Chmurowska. "Investigation of Reactive Powder Concrete (RPC)." Bulletin of the Military University of Technology 67, no. 1 (April 3, 2018): 127–40. http://dx.doi.org/10.5604/01.3001.0011.8052.

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Results of investigations of reactive powder concrete (RPC) are presented in the paper. Optimization of the concrete composition was performed to achieve the highest degree of grains packing based on the optimal graining curve according to Funk for dmax = 1000 μm and dmin = 0.1 μm. Cement, silica fume, quartz and sand powder were considered in the composition. Steel fibers addition of 25% by mass was applied. A very low water–to–binder ratio, amounting to 0.2, was reached applying novel generation of superplasticizers based on polycarboxylates. The RPC mixture remained fluid during 1 hour. The diameter of slump flow according to PN-EN standard amounted to 250 mm after 60 minutes. The hardened concrete RPC displayed high strength and durability. Compressive strength reached 145 MPa after 2 days and about 200 MPa after 28 days; the bending strength exceeded 50 MPa after 28 days. After 56 freezing/defrosting cycles in the deicing salt solution, the concrete has shown minimal salt scaling of only 0.0007 kg/m2. Therefore, frost resistance of the concrete studied can be rated as very good according to PN-EN standard. The SEM pictures proved the amorphous phase of hydrated calcium silicates (C-S-H) is the dominant phase within the RPC microstructure. Usually, the C-S-H phase tightly covers the quartz grains and is in close contact with the unreacted cement grains. Crystallites of the monosulphate (AFm) were also found. The concrete microstructure was compact; pores of a few micrometers were rarely observed. The RPC porosity was measured using the mercury porosimetry. Porosity reduction by almost twice (from 10.9% down to 4.4%) was found after the RPC curing from 2 to 28 days. In the same period, a fraction of small mezopores (diameter below 20 nm) increased from 39.8% to 77.1%. Based on the research results data, presented the RPC concrete can be regarded as an interesting alternative to other construction materials of enhanced explosion resistance. Key words: Reactive Powder Concrete, strength, durability, explosion resistance
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7

Long, Guangcheng, Ye Shi, Kunlin Ma, and Youjun Xie. "Reactive powder concrete reinforced by nanoparticles." Advances in Cement Research 28, no. 2 (February 2016): 99–109. http://dx.doi.org/10.1680/jadcr.15.00058.

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8

Washer, G., P. Fuchs, B. A. Graybeal, and J. L. Hartmann. "Ultrasonic Testing of Reactive Powder Concrete." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 51, no. 2 (February 2004): 193–201. http://dx.doi.org/10.1109/tuffc.2004.1295394.

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9

Washer, G., P. Fuchs, B. A. Graybeal, and J. L. Hartmann. "Ultrasonic testing of reactive powder concrete." IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 51, no. 2 (February 2004): 193–201. http://dx.doi.org/10.1109/tuffc.2004.1320767.

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10

Ruan, Yanfeng, Baoguo Han, Xun Yu, Wei Zhang, and Danna Wang. "Carbon nanotubes reinforced reactive powder concrete." Composites Part A: Applied Science and Manufacturing 112 (September 2018): 371–82. http://dx.doi.org/10.1016/j.compositesa.2018.06.025.

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11

R. Kakad, Pankaj, Ganesh B. Gaikwad, Rajesh R. Hetkale, Dattatray S. Kolekar, and Prof Yogesh Paul. "Reactive Powder Concrete Using Fly Ash." International Journal of Engineering Trends and Technology 22, no. 8 (April 25, 2015): 380–83. http://dx.doi.org/10.14445/22315381/ijett-v22p278.

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12

Jiao, Chujie, and Wei Sun. "Impact resistance of reactive powder concrete." Journal of Wuhan University of Technology-Mater. Sci. Ed. 30, no. 4 (July 30, 2015): 752–57. http://dx.doi.org/10.1007/s11595-015-1223-5.

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13

Aïtcin, Pierre-Claude, Mohamed Lachemi, Régis Adeline, and Pierre Richard. "The Sherbrooke Reactive Powder Concrete Footbridge." Structural Engineering International 8, no. 2 (May 1998): 140–44. http://dx.doi.org/10.2749/101686698780489243.

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14

Grzeszczyk, Stefania, and Grzegorz Janus. "Reactive powder concrete with lightweight aggregates." Construction and Building Materials 263 (December 2020): 120164. http://dx.doi.org/10.1016/j.conbuildmat.2020.120164.

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15

Alkhaly, Yulius Rief. "REACTIVE POWDER CONCRETE DENGAN SUMBER SILIKA DARI LIMBAH BAHAN ORGANIK." TERAS JURNAL 3, no. 2 (November 6, 2017): 157. http://dx.doi.org/10.29103/tj.v3i2.41.

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<p>Reactive powder concrete (RPC) merupakan varian baru dari beton mutu ultra tingggi (ultra high strength concrete) yang diperkenalkan kepada umum pertama kali pada tahun 1994. Beton modern ini memiliki beberapa keunggulan dibandingkan beton konvensional (normal concrete) atau beton kinerja tinggi (high performance concretes). Penelitian tentang RPC di Indonesi masih sangat terbatas, RPC pertama bermaterial lokal Indonesia dikembangkan tahun 2009, dengan sumber silika berasal dari silica fume. Sebagai bagian dari berbagai penelitian lanjutan tentang RPC, hasil akhir dari riset ini diharapkan dapat menghasilkan RPC yang benar-benar sesuai dengan karakteristik material di Indonesia. Sumber silika yang digunakan berasal dari limbah bahan organik sehingga dapat menekan biaya produksi dan menghasilan green concrete yang dapat mengurangi dampak negatif limbah terhadap lingkungan.</p><p><strong>Kata kunci:</strong> Reactive Powder Concrete, Silika, Limbah Bahan Organik</p>
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16

Wang, Xiao Fei, Yang Ping Wang, and Li Cheng Wu. "Degradation Phenomenon of Basic Mechanical Properties of Plain Reactive Powder Concrete with Time." Advanced Materials Research 1065-1069 (December 2014): 1871–74. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.1871.

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The same batch reactive powder concrete specimens were obtained with same raw materials and curing process, uniaxial compressive strength test had been done on the specimens after hot water curing placed in laboratory for seven days , three months and three years. The test results showed that seven-day strength and three-month strength of plain reactive powder concrete after hot water curing are almost equal. Strength of plain reactive powder concrete has not degradation within three months after hot water curing. While strength of plain reactive powder appears serious degradation phenomenon after placed in Laboratory for three years. Comparing uniaxial compressive strength test results of plain reactive powder concrete at three-month with three-year after hot water curing ,we find that strength of plain reactive concrete at three-year decrease about 27 percent than the strength of plain reactive powder concrete placed at laboratory for three months, and elasticity modulus increases about 71 percent, axial peak strain decrease about 62 percent respectively .With the passage of time, plain reactive powder concrete appears more Brittle Features and less toughness.
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17

Sebastin, Selvadurai, Arun Kumar Priya, Alagar Karthick, Ravishankar Sathyamurthy, and Aritra Ghosh. "Agro Waste Sugarcane Bagasse as a Cementitious Material for Reactive Powder Concrete." Clean Technologies 2, no. 4 (December 7, 2020): 476–91. http://dx.doi.org/10.3390/cleantechnol2040030.

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In the field of advanced concrete science, the construction industry has risen to great heights. Due to its own characterisation, the manufacturing cost of reactive powder concrete (RPC) is very high. This can be minimised by substituting the components of the RPC with the aid of agro waste. Because of the production of sugar from the sugar cane industry, bagasse ash is abundantly available in India. It is not ideal for the direct replacement of ingredients in concrete because of the presence of carbon dioxide in bagasse ash. The study of bagasse ash’s actions under different temperatures and different exposure times is discussed in this paper. It is inferred from the findings obtained from the energy dispersive study of X-ray (EDAX) that the presence of reactive silica in bagasse ash could be substituted by RPC ingredients due to heat treatment. RPC is composed of exceptionally fine powders (cement, sand, quartz powder and silica smolder) and superplasticiser. The superplasticiser, utilised at its ideal dose, decreases the water to cement proportion (w/c) while enhancing the workability of the concrete. A thick matrix is accomplished by optimising the granular packing of the dry fine powders. This compactness gives RPC ultra-high quality and durability. Reactive powder concretes have compressive qualities extending from 200 to 800 MPa.
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18

Kushartomo, Widodo, Dewi Linggasari, and Arianti Sutandi. "Effect of maximum grain size on value of modulus of rupture reactive powder concrete." MEDIA KOMUNIKASI TEKNIK SIPIL 26, no. 1 (July 30, 2020): 1–8. http://dx.doi.org/10.14710/mkts.v26i1.25088.

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Modulus of rupture (R) is a measurement of a tensile strengh of a concrete beam. The value of R is affected by the size of fine aggregat grain, the density of the concrete beam and the water-cement ratio. The unit of R is MPa expressing the tensile strength of the concrete beam without reinforcement to withstand a buckling failure. The distance between the supports of the concrete beam should not be less than three times of the height of the beam. In this research the size of the concrete beam speciment was 100 mm x 100 mm x 350 mm, the maximum fine aggregate size was varied (300 µm, 425 µm, and 600 µm) and the water-cement ratio was also varied (0.25, 0.22 and 0,20). All speciments were cured by steam curing and were tested after seven days. The results show that the larger the size of the fine aggregat grain and the higher the water-cement ratio, the smaller the R.
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19

Mahmoud Hama, Sheelan, Dhifaf Natiq Hamdullah, and Shaho Mahmoud Hama. "Reactive Powder Concrete Beam's Behavior in Flexural : Review." Diyala Journal of Engineering Sciences 14, no. 4 (December 6, 2021): 113–31. http://dx.doi.org/10.24237/djes.2021.14410.

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Reactive Powder Concrete can be considered as a special type of concrete in which the coarse aggregate will be eliminated to get a homogenous microstructure with a maximum density for final result. Many researchers presented a state of the art review on reactive powder's production, mechanical properties, durability, development and applications. But the review about structural behavior is hardly to found. Because of importance of this type of concrete and its structural applications. This paper focused on review the researchers that deals with structural behavior of reactive powder concrete beams under bending load. Also review the proposed design equations related with reactive concrete behavior. Before starting a review of strength , stress-strain relation and ductility are presented because of their importance and effect on structure behavior of beams under bending. According to review of previous studies the type of fibers and its content as volumetric ratio, type of pozalanic materials and its content , amount of longitudinal steel reinforcement are main factors that affected the flexural behavior of reinforced Reactive Powder Concrete
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20

Nandini, V. "Comparative Study of Reactive and Modified Reactive Powder Concrete." International Journal for Research in Applied Science and Engineering Technology 6, no. 4 (April 30, 2018): 121–26. http://dx.doi.org/10.22214/ijraset.2018.4025.

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21

Chadli, Mounira, Mellas Mekki, and Bouzidi Mezghiche. "Formulation and study of metal fiber-reinforced reactive powder concrete." World Journal of Engineering 15, no. 4 (August 6, 2018): 531–39. http://dx.doi.org/10.1108/wje-04-2017-0094.

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PurposeReactive powder concretes (RPCs) are new concretes characterized by a particle diameter not exceeding 600 µm and very high compressive and tensile strengths. This paper aims to the development and study of the physico-mechanical, elastic properties and durability of an ultra-high performance concrete from materials existing on the Algerian market.Design/methodology/approachThree mineral additions such as granulated slag, quartz powder and silica fume are incorporated into the cement with 15, 23 and 25 per cent, respectively, in addition to use two different values of steel fiber volume fraction (2 and 2.5 per cent). The results show that the incorporation of 2.5 per cent metal fibers in the formulation of the RPC gives a high compressive strengths of 143.5 MPa at 60 days. The relationship between the relative value and the longitudinal elasto-instantaneous deformations of the RPC to a linear characteristic throughout the relative stress ranges. Also, the modulus of elasticity developed for a fiber-reinforced reactive concrete is greater than that of the unbound fiber.FindingsResults from the current study concluded that the presence of the mineral additions improves the durability of the concretes compared with that not adjuvanted by mineral additions.Originality/valueIt can be possible to manufacture fiber-reinforced reactive powder concretes (RPCFs) with compressive strength exceeding 140 MPa, with an adequate plasticity, despite the simplicity of means and materials and the incorporation of different percentage of metal fiber on the mechanical strength of concretes and its influence on behavior with respect to aggressive environment were achieved.
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22

Zhu, Zhi Gang, Bei Xing Li, Jin Cheng Liu, and Xing Dong Lv. "Effects of Curing Systems on the Strength and Microstructure of Reactive Powder Concrete with Iron Tailing Sands." Applied Mechanics and Materials 548-549 (April 2014): 247–53. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.247.

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To produce 130MPa reactive powder concrete with iron tailing sands as aggregation in an economic hot curing system, the effects of curing temperature, curing time and curing conditions on the reactive powder concrete was studied, the reasons of the strength of reactive powder concrete in different curing systems has the difference from the submicroscopic structure point of view was analyzed. The results show that use 90°C hot water to cure reactive powder concrete for 48h can lead it’s 28 day compressive strength reaches 140MPa, the flexural strength reaches 28MPa.
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23

Grzeszczyk, Stefania, and Grzegorz Janus. "Lightweight Reactive Powder Concrete Containing Expanded Perlite." Materials 14, no. 12 (June 17, 2021): 3341. http://dx.doi.org/10.3390/ma14123341.

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This paper presents the test results of the lightweight concrete properties obtained by adding expanded perlite (EP) to an RPC mix in quantities from 30% to 60% by volume of the concrete mix. It has been shown that in these cases it is possible to obtain concrete containing 30% by volume with density of approximately 1900 kg/m3 and the compressive strength > 70 MPa, with a very low water absorption value (3.3%), equal to the water absorption value of RPC without lightweight aggregate (3.3%). However, with the increased quantity of perlite (from 45% to 60%), the concrete density reduction is not observed, as the expanded perlite demonstrates very low resistance to crushing. With the increased amount of perlite, the longer periods of mixing time for all the mix components are required to obtain the homogeneous and fluid concrete mix, what causes grounding down EP. Therefore, using larger quantities of this aggregate in RPC is not recommended. The lightweight RPC shows very good freeze-thaw resistance in the presence of de-icing salt (the scaling mass is lower than 0.1 kg/m2). The above is explained by the compact microstructure of this concrete and the RPC mix location in open pores on the perlite aggregate surface, which consequently affects the strengthening of the aggregate-matrix contact without an interfacial transition zone (ITZ) visible. It has been demonstrated that pozzolanic activity of expanded perlite is much lower than the activity of silica fume and quartz powder, and its impact on increasing the RPC strength is minimal.
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Chuang, Mei Ling, and Wei Hsing Huang. "Durability Analysis Testing on Reactive Powder Concrete." Advanced Materials Research 811 (September 2013): 244–48. http://dx.doi.org/10.4028/www.scientific.net/amr.811.244.

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Reactive powder concrete (RPC) has been proposed as barrier materials for the construction of engineered barrier in Taiwan. The durability characteristics of RPC in such applications become paramount for the success of the containment of the wastes. The adverse environmental conditions at the disposal site could attack concrete barrier and results in degradation of the material.Laboratory tests will be conducted on RPC with various compositions to investigate the durability test of RPC. These include chloride ion ingress, and sulfate attack of RPC. In this study, the resistance of concrete to sulfate attack was tested by submerging RPC specimens in Na2SO4 solution. Based on the volume change data for a period of1 year, the RPC with higher water to binder ratio (W/B) exhibited lower resistance to sulfate attack. The electrochemical technique is applied to accelerate chloride-ion migration test for RPC. The RPCs chloride migration coefficient is significantly decreased by the use of pozzolanic material, compared with ordinary concrete.
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25

Li, Hongbing, Fangbo Wu, Liangtao Bu, Yong Liu, and Jiang Yao. "Study on the compression performance of steel reactive powder concrete columns." Advances in Structural Engineering 23, no. 10 (February 16, 2020): 2018–29. http://dx.doi.org/10.1177/1369433220903986.

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In this study, the mechanical properties and failure characteristics of steel reactive powder concrete columns with different strength grades were investigated through compression testing. Six steel reactive powder concrete columns were tested; three columns underwent axial compression testing and three columns underwent eccentric compression testing. The results of the axial compression testing showed that steel and reactive powder concrete could work cooperatively at the initial stage, and the final column failure mode was primarily splitting failure at the end of the column, with the formation of a main crack in the longitudinal direction extending to the middle of the column. The results of the eccentric compression testing showed that the eccentrically loaded steel reactive powder concrete columns had comparatively strong deformability. The columns presented ductile failure mode under the eccentric load with 0.2 eccentricity. The final failure of the column involved a sudden increase in the horizontal crack width on the tension side, the steel flange on the tension side reached the yield state, the reactive powder concrete in the middle of the compressive side was crushed, and the reactive powder concrete surface layer burst open and partially spalled off. According to the test results and with reference to the relevant standards, equations for calculating the approximate ultimate bearing capacities of axially and eccentrically compressed reactive powder concrete columns were proposed.
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Ande, Sreedevi, Bruce Berdanier, and Venkataswamy Ramakrishnan. "Performance of Reactive Powder Concrete Containing Arsenic." Journal of Water Resource and Protection 03, no. 05 (2011): 335–40. http://dx.doi.org/10.4236/jwarp.2011.35042.

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27

Velichko, Evgeny Georgievich, and Nikolai Ivanovich Vatin. "Reactive Powder Concrete Microstructure and Particle Packing." Materials 15, no. 6 (March 17, 2022): 2220. http://dx.doi.org/10.3390/ma15062220.

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The subject of this study is the dispersed composition of multicomponent cement systems. This study aims to reduce interparticle voids, increasing the strength and concentration of the solid phase. The investigated concrete mixture contained two fine aggregate fractions, granite-gabbro crushed stone of 5–10 mm fraction, Portland cement of CEM I 42.5N class, finely dispersed granular blast furnace slag, microsilica, highly dispersed cement fraction, superplasticizer Glenium 430, and high-valence hardening accelerator. A laser analyzer determined the shape and size of dispersed particles of the components. The structure of the cement stone was studied by scanning microscopy, thermographic, and X-ray phase analysis methods. The strength of concrete with an optimized dispersed composition at the age of 2 days was 52, 63, and 74 MPa, while that at the age of 28 days was 128, 137, and 163 MPa. For this concrete, the consumption of multicomponent cement was 650, 700, and 750 kg/m3, respectively. The high efficiency of the application of bimodal clinker component and granulated blast-furnace slag is shown. It is established that the optimal content of nanoscale additives, including microsilica, should be insignificant and determined experimentally.
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Marzoq, Zahraa Hadi, and Tumadhir Merawi Borhan. "Modelling hybrid reactive powder concrete T-beams." Journal of Physics: Conference Series 1895, no. 1 (May 1, 2021): 012054. http://dx.doi.org/10.1088/1742-6596/1895/1/012054.

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29

Tam, C. M., V. W. Y. Tam, and K. M. Ng. "Optimal conditions for producing reactive powder concrete." Magazine of Concrete Research 62, no. 10 (October 2010): 701–16. http://dx.doi.org/10.1680/macr.2010.62.10.701.

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30

Ženíšek, Michal, Tomáš Vlach, and Lenka Laiblová. "Flexural Strength of the Reactive Powder Concrete." Solid State Phenomena 249 (April 2016): 108–11. http://dx.doi.org/10.4028/www.scientific.net/ssp.249.108.

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Reactive powder concrete (RPC) is cement composite which is characterized by an absence of coarse aggregate. That resulted in a greater homogeneity of the mixture and thus also in a higher compressive strength. On the other side, the absence of coarse aggregate and typically a large volume of the paste lead to the deterioration of some of the properties of concrete. This paper deals with the relationship between maximum aggregate size and flexural strength of the reactive powder concrete without dispersed reinforcement. Quartz sand with maximum grain size of 1, 2 and 4 mm was used for the experiments. The flexural strength was measured through the four-point bending test on prisms 100 x 100 x 400 mm. Further, the quartz powder and ground granulated blast furnace slag were used as addition and compared with each other. The results of the experiments showed that the flexural strength grows with decreasing aggregate size. This tendency was observed in mixtures with quartz powder and also with ground granulated blast furnace slag. On the contrary, the compressive strength was independent on aggregate size, but dependent on the type of used addition.
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31

Cheyrezy, Marcel, Vincent Maret, and Laurent Frouin. "Microstructural analysis of RPC (Reactive Powder Concrete)." Cement and Concrete Research 25, no. 7 (October 1995): 1491–500. http://dx.doi.org/10.1016/0008-8846(95)00143-z.

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32

Zhang, Wei, Baoguo Han, Xun Yu, Yanfeng Ruan, and Jinping Ou. "Nano boron nitride modified reactive powder concrete." Construction and Building Materials 179 (August 2018): 186–97. http://dx.doi.org/10.1016/j.conbuildmat.2018.05.244.

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33

Xiao, Guoliang, Ri Gao, and Piet Stroeven. "Static Behaviour of Reactive Powder Concrete Beams." IABSE Symposium Report 88, no. 3 (January 1, 2004): 142–47. http://dx.doi.org/10.2749/222137804796302572.

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34

Wardi, Adil Hadi, Gökhan Tunç, and Khalil Ibraheem. "Structural behavior of shear connectors embedded in different types of concrete." Challenge Journal of Structural Mechanics 6, no. 4 (December 20, 2020): 160. http://dx.doi.org/10.20528/cjsmec.2020.04.001.

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Push-out tests are used to determine shear connectors’ properties where two small reinforced concrete walls are attached to the top and bottom flanges of an I-section through four shear studs located on both its flanges. In this study, the structural behavior of shear connectors was examined by testing a total of 36 push-out specimens. In these specimens, various test parameters were used. The types of shear connectors and their strengths, their connection types, and the strength of the concrete in which they were embedded were all investigated. Headed, L-shaped, and C-shaped studs were selected in this experimental study to represent different types of shear connectors. These shear connectors were assumed to be either ordinary or high strength steel-embedded in three different types of concrete: ordinary, high strength, and reactive powder concretes. In these tests, the shear connectors were connected through welding or epoxy bonding. The objective of this study was to investigate the structural behaviors of these different types of shear connectors by focusing on their shear force capacities and slip values. The test results indicate that the reactive powder concrete increased the mechanical properties of concrete as the concrete age increased. The specimens with C-shaped studs made of high-strength steel with welded studs embedded in normal weight, high strength and reactive powder concretes, generated the maximum shear resistance values.
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35

Chen, Wanxiang, Zixin Zhou, Huihui Zou, and Zhikun Guo. "Predictions of residual carrying-capacities for fire and near-field blast-damaged reactive powder concrete-filled steel tube columns." International Journal of Protective Structures 9, no. 4 (July 19, 2018): 525–53. http://dx.doi.org/10.1177/2041419618784738.

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An approximate approach is developed to estimate the residual carrying-capacities of fire and near-field blast-damaged reactive powder concrete-filled steel tube columns. The single-degree-of-freedom model is employed to calculate the initial deflections of fire-damaged reactive powder concrete-filled steel tube columns subjected to axial and blast-induced transverse loads, and then a modified formula including double coefficient is further proposed to predict the ultimate resistance. Then, a series of blast-resistance and load carrying-capacity tests on six large-scale reactive powder concrete-filled steel tube columns are conducted to validate the suitability of theoretical method presented in this article. Blast tests demonstrate that the blast-resistances of reactive powder concrete-filled steel tube columns are more sensitive to fire durations than to scale distances. In addition, it is indicated that ISO-834 standard fire exposures cause significant degradations of material properties and have remarkable effects on the residual carrying-capacities of reactive powder concrete-filled steel tube columns. No local bucking and burst could be observed in the residual carrying-capacity tests; also, there are no visible hinge-like deformations in the mid-span area, and the excellent fire-resistances and blast-resistances of reactive powder concrete-filled steel tube columns are experimentally verified. Analytical results show that the predicted axial load capacities of six reactive powder concrete-filled steel tube columns are in good agreement with experimental data. All damage indices of the test specimens are within 0.8, meaning only minor to severe damage is done to the reactive powder concrete-filled steel tube column during fire and blast attacks, which is consistent with the test results.
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36

Karthik, S., and Karthik Sundaravadivelu. "Retrofitting of Reinforced Concrete Beams using Reactive Powder Concrete (RPC)." IOP Conference Series: Earth and Environmental Science 80 (July 2017): 012038. http://dx.doi.org/10.1088/1755-1315/80/1/012038.

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37

Ju, Yanzhong, Tong Shen, and Dehong Wang. "Bonding behavior between reactive powder concrete and normal strength concrete." Construction and Building Materials 242 (May 2020): 118024. http://dx.doi.org/10.1016/j.conbuildmat.2020.118024.

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38

Al shemaree, Zainab, and Nada Aljalawi. "Some properties of Reactive Powder Concrete Contain Recycled Glass Powder." Journal of Engineering 28, no. 10 (October 1, 2022): 42–56. http://dx.doi.org/10.31026/j.eng.2022.10.04.

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Every year, millions of tons of waste glass are created across the globe. It is disposed of in landfills, which is unsustainable since it does not disintegrate into the environment. This study aims to produce reactive powder concrete by using recycled glass powder and determine the influence on the mechanical properties. This study investigated the effect of partial replacement of cement with recycled glass powder at two percentages (0, 20) % by weight of cement on some mechanical properties (Fresh density, Splitting tensile strength, Impact Strength, and voids%) of reactive powder concrete containing 1 % micro steel (MSRPC). Furthermore, using steam curing for (5 hours) at 90 degrees celsius after hardening the sample directly, RPC was produced using local cement, silica fume, and a super plasticizer, with a w/c (0.2). It was found the Fresh density increased by about (7.27%), splitting tensile strength increased by about (23.5%) at age 28day, energy that causes 1-st crack increased by about (77.7%), energy that causes ultimate failure increased by about (54.9%) at age 60 days, and a reduction in the voids % by about (12.5)% at age 28 day compared with the reference mixture.
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39

Hattatoglu, Fatih, and Abdulrezzak Bakis. "Usability of ignimbrite powder in reactive powder concrete road pavement." Road Materials and Pavement Design 18, no. 6 (August 2, 2016): 1448–59. http://dx.doi.org/10.1080/14680629.2016.1213182.

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40

Mao, XinQi, Wenjun Qu, and Peng Zhu. "Mixture Optimization of Green Reactive Powder Concrete with Recycled Powder." Journal of Materials in Civil Engineering 31, no. 5 (May 2019): 04019033. http://dx.doi.org/10.1061/(asce)mt.1943-5533.0002663.

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41

Kushartomo, Widodo, Ika Bali, and Budi Sulaiman. "Mechanical Behavior of Reactive Powder Concrete with Glass Powder Substitute." Procedia Engineering 125 (2015): 617–22. http://dx.doi.org/10.1016/j.proeng.2015.11.082.

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42

Shubbar, Hasanain A., and Nameer A. Alwash. "The Fire Exposure Effect on Hybrid Reinforced Reactive Powder Concrete Columns." Civil Engineering Journal 6, no. 2 (February 1, 2020): 363–74. http://dx.doi.org/10.28991/cej-2020-03091476.

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This paper offers an experimental investigation of the fiber reinforced reactive powder concrete columns' behavior after exposure to fire and improvements made to improve column resistance against fire. This study is mainly aimed to study the experimental behavior of hybrid reinforced columns produced by reactive concrete powder (RPC) and exposure to the flame of fire at one side and subjected to eccentric load. The experimental methodology consists of sixteen RC columns that organized into four groups based on the variables used in this research: (SF) steel fibers, (PP) polypropylene fibers, (HB) hybrid fibers, (PPC-SF) hybrid cross-section (steel fiber reactive powder concrete core with polypropylene fiber reactive powder concrete cover). All columns were tested under 60 mm eccentric load and the burn columns were exposed to fire for different duration (1, 1.5 and 2) hours. The results indicated that (SF-RPC, PP-RPC, HB-RPC, PPC-SFRPC) columns exposed to a fire flame for the period 2 hours, lost from their load capacity by about (54.39, 40.03, 34.69 and 30.68) % respectively. The main conclusion of this paper is that the best fire resistance of the column obtained when using a hybrid cross-section (steel fiber reactive powder concrete core with polypropylene fiber reactive powder concrete cover).
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43

Gawad, Mena A., and Nada M. Fawzi. "Use of Thermostone Waste Aggregates for Internal Curing of Reactive Powder Concrete." IOP Conference Series: Earth and Environmental Science 877, no. 1 (November 1, 2021): 012043. http://dx.doi.org/10.1088/1755-1315/877/1/012043.

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Abstract The concrete need curing for cement hydration that is a chemical reaction in each step require water supply throughout the time period. The traditional concrete cured by external method that prevents the concrete surface dry so that keeping the concrete mixture wet and warm. The internal curing was adopted in normal and high strength concrete such as reactive powder concrete. In present paper, experimental approach is to study the mechanical properties of reactive powder concrete cured internally with thermostone material. The materials that adopted to evaluate and find out the influences of the internal curing on the mechanical properties of reactive powder concrete is focused with different curing methods such as in water, air and combined water and air. Thermostone aggregate are used as partial sand replacement by volume with different percentages to explore the percentage that effects of the concrete mechanical properties. Test results showed that the best partial replacement by thermostone is 5% gave enhancement and increase in compressive strength and flexural resistance strength (modulus of rupture) and concrete density. Highest increasing of compressive strength is 10.07in case of 5% partial replacement at 90 days. In case of cured the specimens up to 90 days, the increase in modulus of rupture is 4.53%
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44

Al-Quraishi, Hussein, Nada Sahmi, and Maha Ghalib. "Bond Stresses between Reinforcing Bar and Reactive Powder Concrete." Journal of Engineering 24, no. 11 (October 30, 2018): 84. http://dx.doi.org/10.31026/j.eng.2018.11.07.

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A good performance of reinforced concrete structures is ensured by the bond between steel and concrete, which makes the materials work together, forming a part of solidarity. The behavior of the bond between the reinforcing bar and the surrounding concrete is significant to evaluate the cracking control in serviceability limit state and load capacity in the ultimate limit state. In this investigation, the bond stresses between reinforcing bar and reactive powder concrete (RPC) was considered to compare it with that of normal strength concrete (NSC). The push-out test with short embedment length is considered in this study to evaluate the bond strength, bond stress-slip relationship, and bond stress-crack width relationship for reactive powder concrete members. The compressive strength of concrete, the nominal diameter of reinforcement, concrete cover, and amount of steel fibers and embedded length of reinforcement were considered as variables in this study. The test results show that the ultimate bond stress increased with increasing of the compressive strength of concrete, decreasing the nominal diameter of the reinforcing bar, increasing the concrete cover and increasing steel fiber content. In a bond stress-slip relationship, the NSC specimen shows a very short softening zone after reaching the peak point in comparisons with RPC specimen. In RPC, bond stress-slip relationship shows stiffer behavior when the steel fiber content was increased. RPC shows stepper softening zone due to the presence of steel fiber, and the absence of steel fiber cause push-out failure without descending part after peak point. Using NSC instead of RPC in anchorage between reinforcement and concrete, decrease the crack width produced due to radial tensile stresses through the push-out of reinforcing bar. In RPC, the absence of steel fiber, decrease the nominal diameter of the reinforcing bar, increase the concrete cover, decrease the embedded length of reinforcing bar cause push-out failure and vice versa cause splitting failure.
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45

Bektimirova, Umut, Aidana Tleuken, Elnara Satekenova, Chang Seon Shon, Di Chuan Zhang, and Jong Kim. "Preliminary Experimental Investigation on the Strength and Air Permeability of Reactive Powder Concrete." Materials Science Forum 917 (March 2018): 321–28. http://dx.doi.org/10.4028/www.scientific.net/msf.917.321.

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A new reinforced concrete foundation system is being proposed to store renewable energy through the compressed air energy storage technology. For this application, the concrete is required to resist considerable tensile strength and to have low air permeability, which is not observed in normal concrete. Therefore, this paper is proposing to use reactive powder concrete for the suggested foundation system. Reactive powder concrete (RPC) is obtained by introducing either micro-cementitious materials like silica fume or fine powders like crushed quartz into the concrete mixture from where coarse aggregates had been removed. RPC has low water content and dense particle packing which lead to high strength and low air permeability characteristics. This paper conducts preliminary experimental investigations on the strength and air permeability of the RPC. Two important mix design parameters are studied including water-to-binder ratio ad silica fume content. Preliminary correlations between mix design parameters and strength/air permeability are developed. From the preliminary test results, it is concluded that the reactive powder concrete has potential to meet the high strength and low air permeability requirements, and is suitable for the proposed energy storage foundation system.
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46

Ji, Yu Yan, Xin Wei Ma, and Yuan Yuan Xia. "Mixture Proportion Design of Reactive Powder Concrete by Means of Liquid Limit." Advanced Materials Research 287-290 (July 2011): 994–97. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.994.

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Close packing of the fine particles is one of the core technologies of preparation of reactive powder concrete. This paper introduces the concept of soil liquid limit in close packing evaluation. Theoretically, the closer of particles pack, the lower is the water demand. The mixture with a lower water demand is expected to have a lower liquid limit. Mixtures were obtained by measuring the cone penetration at different moisture content. By means of numerical fitting and linear interpolation, the liquid limits of the mixtures were obtained，where the software of Matlab was used. The close packing condition of the powders particles could be predicted according to the liquid limits. Strength test confirmed that application of liquid limit in mixing proportion design of reactive powder concrete is feasible. So, this may be a new way for the preparation of reactive powder concrete.
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47

Janus, Grzegorz, and Stefania Grzeszczyk. "Reactive powder concrete with the blastfurnace slag cement." Cement Wapno Beton 25, no. 4 (2020): 306–15. http://dx.doi.org/10.32047/cwb.2020.25.4.5.

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The paper presents the results of tests of the reactive powder concrete [RPC] obtained from the CEM III/A 42.5 N LH/HSR/NA blast furnace slag cement, containing about 60 % of granulated blast furnace slag. The optimisation of the concrete mix composition, aimed at obtaining the largest particle packing in the composite, was carried out based on Funk’s optimal particle size distribution curve. A low water to binder ratio of 0.2 was obtained by using a superplasticiser based on polycarboxylates. It has been shown that it is possible to obtain, under normal conditions, RPC with the use of slag cement, containing 2.0% vol. of steel fibres, with a compressive strength of about 200 MPa and a flexural strength of about 57 MPa, after 180 days of curing. The water absorption of this concrete is only 2.4%, and the results of freeze-thaw resistance tests allow to assessing the freeze-thaw resistance of this concrete as very good, according to the standard SS 13 72 44. RPC has a compact microstructure and the identified C-S-H phase shows a low C/S ratio.
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48

P, Jeganmurugan, Rakesh Senthil Kumar G V, Sivasharmina M, Sowmiya S, and Vasanthan M. "Experimental Study on Reactive Powder Concrete under Flexural Loading." International Journal of Engineering & Technology 7, no. 2.24 (April 25, 2018): 552. http://dx.doi.org/10.14419/ijet.v7i2.24.12505.

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Reactive powder concrete (RPC) is ultra high strength with advanced mechanical properties. Reactive powder concrete is a concrete without coarse aggregate, contains cement, silica fume, quartz sand, quartz powder, super plasticizer, steel fibre and polypropylene fibre with very low water cement ratio under normal curing condition. RPC has been produce with high compressive strength ranging from upto 800 MPa with high flexural strength up to 50 MPa and in some cases provided with absences of steel reinforcement. Mix proportions of RPC were found by trial and error method, the concrete cubes of size 100mmx100mmx100mm were cast for find compressive strength of NRPC at 7days. Concrete cubes and cylinders of sizes 100mmx100mmx100mm and 100mmx150mm have to be cast for finding compressive strength and split tensile strength at 28 days. Flexural strength of NRPC and MRPC will be find out by casting prism of size 500mmx 100mmx 100 mm. The optimum mix proportion has to be finalized by comparing the results of all concrete specimens. Compressive strength test results shows that addition of silica fume upto 0.22% will increase the compressive strength of reactive powder concrete.
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Wang, Wenzhen, Haixiao Lin, Xiaogang Wu, Yuyao Zhao, Ziyu Hu, Pengshuai Wang, and Menglong Zhou. "Experimental Research on Fracture Characteristics of Reactive Powder Concrete in Different Volume Content of Steel Fiber." Geofluids 2022 (May 19, 2022): 1–9. http://dx.doi.org/10.1155/2022/1932642.

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The fracture characteristics of reactive powder concrete in different volume content of steel fiber are researched in this paper, combining with the photoelastic coating method and the mathematical analytical software MATLAB. More precisely, the wholly integrated initiation, stable propagation, and final failure stages of precast cracks in three-point bending specimens of reactive powder concrete in different volume content of steel fiber are directly recorded and systematically analyzed. Besides, the photoelastic fringe distribution graphs from the vicinity of the precast cracks of specimens are obtained. Based on the experimental results and fracture mechanics theory, the mechanical property of reactive powder concrete, fracture energy, ductility index, initial fracture toughness, and unstable fracture toughness are quantitatively and qualitatively analyzed. The research achievements indicate that there is a stable crack propagation process before the instability failure of the three-point bending beam specimen of reactive powder concrete. The fracture process of the structure includes three stages, namely, the crack initiation, stable propagation, and instability failure. The order of the photoelastic fringe, critical effective crack length, crack initiation load, and maximum load of test parameters in the three-point bending beam specimen of reactive powder concrete increases with the increase of the fiber volume ratio. Based on the numerical treatment for the whole curves of each specimen group, the softening curve and the double fracture parameters of reactive powder concrete are obtained. Besides, the calculated critical effective joint length, initiation toughness, toughness increment, and unstable fracture toughness increase with the increase of the steel fiber volume ratio, by analyzing the measured initiation load, maximum load, and critical effective joint length. The research results can be treated as an important basis and reference for the engineering design and safety assessment of reactive powder concrete.
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50

Lee, Tae-Hee, Dal-Hun Yang, Min-Jae Kwon, and Jang-Ho Jay Kim. "Blast-resistance of ultra-high strength concrete and reactive powder concrete." Journal of Asian Concrete Federation 3, no. 2 (December 31, 2017): 98–104. http://dx.doi.org/10.18702/acf.2017.12.3.2.98.

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