Gotowe bibliografie tematyczne / Pumpability

Gotowa bibliografia na temat „Pumpability”

Autor: Grafiati

Data publikacji: 20 lipca 2024

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Artykuły w czasopismach na temat "Pumpability"

Lin, Jia Chao, Yu Xin Gao, Wei Qin Li, Xiong Wu, Yi Xiong Huang i Yuan Peng. "Evaluation Methods Research Based on the Concrete with Rheological Properties". Materials Science Forum 878 (listopad 2016): 170–75. http://dx.doi.org/10.4028/www.scientific.net/msf.878.170.

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As the high-rise building springs, pumping height of concrete becomes higher, which leads to futility of common property indexes to evaluate the concrete pumpability. This paper proposed a test method on concrete rheological properties to quantize its pumpability and established evaluation method on concrete pumpability to make some exploration regarding the scientifically reasonable control on concrete quality.

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TAKANO, Hajime, Yoshihisa NAKATA, Tetsu IWASAWA i Torao KEMI. "THE PUMPABILITY AND CHANGING QUALITY OF CONCRETES BY A COMPACT PUMPABILITY TEST APPARATUS". AIJ Journal of Technology and Design 6, nr 10 (2000): 15–20. http://dx.doi.org/10.3130/aijt.6.15.

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Németh, Alexandra Kitti, i M. B. Maros. "Analysing the Suitability of C16/20-X0v(H)-24-F3 Concrete for Pumping". Materials Science Forum 812 (luty 2015): 213–18. http://dx.doi.org/10.4028/www.scientific.net/msf.812.213.

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The current paper introduces a case study dealing with the problem of pumpability of the ready-mix concrete of grade of C16/20-X0v (H)-24-F3 []. During solving a practical industrial problem we have worked out a modified composition of the related concrete material in order to improve the pumpability. After describing some possible theoretical and practical methods the authors give suggestion for a practical solution. The characteristic feature of the method consists in modifying the recipe of the given grade of concrete without altering the additive structure, and to assure the pulp saturation. The paper reports the results of standardised physical and mechanical tests, executed on the novel concrete material. Based on these results it has been proved, that besides solving the original practical problem of pumpability, the new concrete material possesses better application and technological performance, and is more economical to produce.

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Yun, Kyong-Ku, Pangil Choi i Jung Heum Yeon. "Predicting Pumpability and Shootability of Crushed Aggregate Wet-Mix Shotcrete Based on Rheological Properties". Advances in Materials Science and Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/9838213.

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This study aims to estimate the pumpability and shootability of wet-mix shotcrete (WMS) made with crushed aggregates and various admixtures such as silica fume, fly ash, ground granulated blast furnace slag (GGBFS), metakaolin, and steel fiber based on rheological properties. The IBB rheometer was employed as an apparatus to measure the rheological properties of freshly mixed shotcrete such as flow resistance and torque viscosity. Results have shown that the use of silica fume and metakaolin led to satisfactory pumpability, whereas mixtures with fly ash and steel fiber failed to meet the pumping criteria at normal pump pressure. The build-up thickness, an indicator to represent shotcrete shootability, was predicted to vary between 68 and 218 mm, demonstrating that the use of admixtures resulted in a wide spectrum of shootability. In particular, the use of metakaolin was found to substantially increase the predicted build-up thickness only with a small replacement. The findings of this study are expected to be used as an easy-to-use guideline for estimating pumpability and shootability of WMS when no compliance testing data is available.

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Choi, Myoungsung, Chiara F. Ferraris, Nicos S. Martys, Didier Lootens, Van K. Bui i H. R. Trey Hamilton. "Metrology Needs for Predicting Concrete Pumpability". Advances in Materials Science and Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/456238.

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With the increasing use of pumping to place concrete, the development and refinement of the industry practice to ensure successful concrete pumping are becoming important needs for the concrete construction industry. To date, research on concrete pumping has been largely limited to a few theses and research papers. The major obstacle to conduct research on concrete pumping is that it requires heavy equipment and large amounts of materials. Thus, developing realistic and simple measurement techniques and prediction tools is a financial and logistical challenge that is out of reach for small research labs and many private companies in the concrete construction industry. Moreover, because concrete pumping involves the flow of a complex fluid under pressure in a pipe, predicting its flow necessitates detailed knowledge of the rheological properties of concrete, which requires new measurement science. This paper summarizes the technical challenges associated with concrete pumping and the development in concrete pumping that have been published in the technical literature and identifies future research needed for the industry to develop best practices for ensuring successful concrete pumping in the field.

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HASHIMOTO, Shin-ichiro, Kyosuke HIRAKAWA, Kosuke MINAMI i Yoshimitsu NAKAZIMA. "STUDY OF PIPING ROUTE CONDITIONS AND EVALUATION OF CONCRETE PUMPABILITY ON THE SIMPLE MEASUREMENT OF CONCRETE PUMPABILITY". Cement Science and Concrete Technology 69, nr 1 (2015): 272–78. http://dx.doi.org/10.14250/cement.69.272.

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Cui, Xiangfei, Guoming Liu, Cheng-long Wang i Yudong Qi. "Effects of PET Fibers on Pumpability, Shootability, and Mechanical Properties of Wet-Mix Shotcrete". Advances in Civil Engineering 2019 (28.11.2019): 1–14. http://dx.doi.org/10.1155/2019/2756489.

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Polyethylene terephthalate (PET) fiber from waste plastic bottles is an environmentally friendly fiber that can improve the mechanical properties of wet-mix shotcrete. The main objective of this paper is to investigate the effects of PET fiber parameters on pumpability, shootability, and mechanical properties of wet-mix shotcrete. For this purpose, the orthogonal test based on three factors and three levels was conducted. The width, length, and content of PET fiber were selected as the experimental variables. The tests of wet-mix shotcrete reinforced by PET fibers were carried out, along with properties tests such as slump, pressure drop, build-up thickness, compressive strength, and splitting strength. The results showed the change trend of shotcrete performances with increasing PET fiber parameters (width, length, and content). According to the orthogonal test, PET fiber parameters were determined (1 mm width, 20 mm length, and 5 kg/m3 content). Furthermore, relationships between slump and pumpability and shootability were explored, as well as the relationships between pumpability, shootability, and mechanical properties. It was found that pressure drop and compressive strength had the strongest negative linear relationship among all fitting relationships. We hoped that this study could contribute the useful information for the application of wet-mix shotcrete mixed with PET fibers.

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Arslanov, M. G., V. L. Lashkhi, G. M. Beloshapkina, L. A. Dem'yanov i G. I. Shor. "Assessment of the pumpability of motor oils". Chemistry and Technology of Fuels and Oils 24, nr 9 (wrzesień 1988): 399–401. http://dx.doi.org/10.1007/bf00727523.

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Li, Huajian, Fali Huang, Haifeng Tu, Deyi Sun, Zhen Wang, Zhonglai Yi, Zhiqiang Yang i Yongjiang Xie. "Pumpability of Manufactured Sand Self-compacting Concrete". Journal of Wuhan University of Technology-Mater. Sci. Ed. 38, nr 6 (20.11.2023): 1382–90. http://dx.doi.org/10.1007/s11595-023-2832-z.

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Dai, Guozhong, Yanmin Sheng, Yutao Pan, Guicai Shi i Shujin Li. "Application of a Bentonite Slurry Modified by Polyvinyl Alcohol in the Cutoff of a Landfill". Advances in Civil Engineering 2020 (13.01.2020): 1–9. http://dx.doi.org/10.1155/2020/7409520.

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Soil-bentonite cutoff walls are usually used to contain the contaminants of landfills. The pumpability, permeability, and adsorption capability of the slurry are all crucial to the performance of the cutoff wall. In this study, the effect of polyvinyl alcohol (PVA) was used to improve the performance of bentonite slurry. A series of lab tests were conducted to evaluate the pumpability, permeability, and adsorption capacity with different concentrations of PVA treatment. Results show that the addition of PVA can increase the fluidity and pumpable period of slurry, which facilitates the casting and grouting during construction. The addition of PVA also helps to reduce the permeability coefficient of slurry and improve the adsorption capability which enhances the cutoff performance of the walls.

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Rozprawy doktorskie na temat "Pumpability"

Rmili, Yosra. "ÉTUDE DE LA DILATANCE DE REYNOLDS DU BÉTON ET DE SON EFFET SUR LA FORMATION DE LA COUCHE DE LUBRIFICATION DANS LES TUYAUX DE POMPAGE". Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1283.

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Le processus de pompage du béton revêt une importance capitale dans le secteur de construction, facilitant le transport du béton frais vers le site de coulée, voire des zones difficiles d'accès. Cette technique offre la possibilité d'atteindre des hauteurs et des distances considérables. Toutefois, ce processus n'est pas sans défis. Il est donc primordial de pouvoir bien prédire la pompabilité du béton. En effet, la pompabilité du béton dépend étroitement de ses propriétés rhéologiques et de sa capacité à former une couche de lubrification (CL) lors de son écoulement dans les conduites de pompage. Par conséquent, une bonne compréhension de la rhéologie du béton et des caractéristiques de la CL est essentielle, d'autant plus que les mécanismes de formation de cette dernière demeurent encore méconnus. Cette thèse se concentre sur l'étude de la dilatance de Reynolds (DR) en tant que mécanisme potentiel intervenant dans la formation de la CL, et elle vise à mettre en évidence les principaux paramètres qui les régissent. La première partie de l'étude présente le développement d'une nouvelle méthode pour évaluer les variations de volume induites par le cisaillement, nommée la dilatance de Reynolds du béton en écoulement à surface libre. Cette méthode, bien que plus fiable pour les bétons conventionnels, ne permet cependant pas d'explorer pleinement ce mécanisme. En conséquence, un nouveau dispositif empirique, le CRD-Test, a été conçu pour évaluer la dilatance de Reynolds des bétons autoplaçants soumis à différents scénarios de cisaillement à surface libre et sous pression, simulant ainsi les processus réels de coulage et de pompage. Dans cette seconde partie de l'étude, le béton autoplaçant (BAP) est considéré comme un mélange biphasique, composé de gros granulats (> 1,25 mm) immergés dans une matrice fluide de mortier fin (< 1,25 mm). En outre, le CRD-Test offre une couverture large des niveaux de cisaillement et de pression. Il repose sur un tribomètre à cylindre coaxial modifié, dont la vitesse de rotation varie de 0 à 3 tr/s, et sur un régulateur de pression d'air ajustable de 0 à 300 kPa. Le phénomène de dilatance de Reynolds se traduit par des fluctuations de la pression latérale mesurée au niveau du cylindre extérieur de cet appareil et a été étudié à travers de nouveaux indices. Les résultats expérimentaux révèlent que les indices de pression induits par la dilatance de Reynolds sont en accord avec la maniabilité du béton et ses paramètres de formulation. Les bétons autoplaçants présentant des faibles valeurs d'étalement montrent des indices de dilatance de Reynolds élevés sous cisaillement à surface libre et sous pression. De plus, une approche diphasique permet de mettre en évidence des corrélations entre la dilatance de Reynolds et les caractéristiques des granulats dont le diamètre est supérieur à 1,25 mm ainsi que les caractéristiques viscoplastiques du mortier fin, (i.e. la phase suspendante). De plus l'étude montre que la dilatance de Reynolds est principalement affectée par le degré d'empilement initial du squelette granulaire pendant le processus de pompage. Enfin, les valeurs de dilatance de Reynolds sont en en bon accord avec les caractéristiques du régime d'écoulement, la dynamique des particules et les indices de migration des particules sous l'effet du cisaillement. Selon les corrélations établies, il apparaît que la ségrégation dynamique peut significativement influencer les mécanismes de formation de la CL lors du pompage du béton à faibles taux de cisaillement, illustrant ainsi l'importance de la dilatance de Reynolds dans ce processus. Cependant, il a été observé qu'à des taux de cisaillement plus élevés, la ségrégation dynamique peut avoir un impact négatif sur les valeurs de dilatance de Reynolds, augmentant ainsi le risque de blocage durant le processus de pompage du béton
Concrete pumping process is important in the construction sector, facilitating the transport of fresh concrete to the casting site, even in difficult-to-access areas. This technique enables the achievement of considerable heights and distances. However, this process presents challenges. Therefore, accurately predicting the pumpability of concrete appears to be essential. Indeed, concrete pumpability relies on its rheological properties and its ability to form a lubrication layer (LL) during its flow through pipes. Accordingly, it is worthy to mention that mastering the rheology of concrete and understanding the characteristics of the LL is important, especially considering that the mechanisms of LL formation remain not well understood.This project focuses on investigating Reynolds dilatancy (RD), a potential mechanism involved in LL formation, and aims to highlight the key parameters governing it. The first part of the study introduces the development of a new method to assess shear-induced variations (RD) at free-surface flow. This method, although more reliable for conventional vibrated concrete (CVC), it does not fully explore this mechanism. Consequently, a new empirical device, the CRD-Test, was designed to evaluate the RD of self-compacting concrete (SCC) subjected to various scenarios under free-surface and pressurized conditions, simulating real casting and pumping processes. In this second part of the study, SCC is considered as a biphasic mixture of coarser particles (> 1.25 mm) in a fluid matrix of fine mortar (< 1.25 mm). Moreover, the new experimental device, named CRD-Test, offers wide range of shear and pressure levels. It is based on a modified coaxial cylinder tribometer, with a rotational speed ranging from 0 to 3 rps, and an air pressure regulator from 0 to 300 kPa. The RD phenomenon is manifested by fluctuations in lateral pressure measured at the outer cylinder of this apparatus and it was investigated through new indices.Experimental results reveal that RD values were found to be in good agreement with the workability and design parameters of the investigated concrete mixtures. Concrete with low fluidity values exhibited high RD indices under both free-surface and pressurized shear conditions. Furthermore, a biphasic approach highlights correlations between RD and the characteristics of aggregates with a diameter greater than 1.25 mm, as well as the viscoplastic characteristics of the fine mortar (i.e., the suspending phase). Moreover, RD results are mainly affected by the relative packing density of coarse aggregate during pumping process. Finally, Reynold values were in good agreement with flow regime characteristics, particle dynamics, and shear-induced particle migration indices. According to established correlations, dynamic segregation can significantly influence the mechanisms of LL formation during concrete pumping at low shear rates, illustrating the importance of Reynolds dilatancy in this process. However, at higher shear rates, dynamic segregation has been observed to negatively impact RD values, thereby increasing the risk of blockage during concrete pumping

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Książki na temat "Pumpability"

American Society for Testing and Materials., red. Cold starting and pumpability studies in modern engines. West Conshohoken, PA: ASTM, 1999.

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American Society for Testing and Materials., red. Cold starting and pumpability studies in modern engines. West Conshohoken, PA: ASTM, 1998.

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American Society for Testing and Materials., red. Cold starting and pumpability studies in modern engines: November, 1998. West Conshohoken, Penn: ASTM, 1998.

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China) International Symposium on Ultra-High-Pumpability and High Performance Concrete Technology (2008 Guangzhou. Ultra-high-pumpability and high performance concrete technology: Selected, peer reviewed papers from the International Symposium on Ultra-High-Pumpability and High Performance Concrete Technology, April 22- 23, 2008, Guangzhou, Guangdong, China. Switzerland: Trans Tech Publications, 2009.

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Ye, Hao-Wen, i Gai Fei Peng. Ultra-High-Pumpability and High Performance Concrete Technology. Trans Tech Publications, Limited, 2009.

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Ye, Hao Wen, i Gai Fei Peng. Ultra-High-Pumpability and High Performance Concrete Technology. Trans Tech Publications Ltd, 2009. http://dx.doi.org/10.4028/b-xbz4zx.

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American Society for Testing and Materials. Cold Starting and Pumpability Studies in Modern Engines: Astm Research Report Rr-D02. Astm Intl, 1999.

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Części książek na temat "Pumpability"

Stockhammer, Raimund. "Pumpability of Lubricants (Grease) in Centralized Systems". W Encyclopedia of Lubricants and Lubrication, 1479–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_321.

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Mohan, Manu K., A. V. Rahul, Kim Van Tittelboom i Geert De Schutter. "Evaluating the Influence of Aggregate Content on Pumpability of 3D Printable Concrete". W RILEM Bookseries, 333–41. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49916-7_34.

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Ngo, Tien-Tung, Chanh-Trung Mai, El-Hadj Kadri i Abdelhak Kaci. "Application of Empirical Models to Optimizing Concrete Pumpabiltity". W Lecture Notes in Civil Engineering, 338–45. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6713-6_33.

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"pumpability". W Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik, 1057. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-41714-6_164372.

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"Pumpability Tests". W Encyclopedia of Lubricants and Lubrication, 1489. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_100574.

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"pumpability, n." W Oxford English Dictionary. Wyd. 3. Oxford University Press, 2023. http://dx.doi.org/10.1093/oed/9523128620.

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Atkins, A. S., A. Barkhordarian, R. N. Singh i A. H. Zadeh. "Pumpability of Coal Mine Tailings for Underground Disposal and for Regional Support." W Advances in Mining Science and Technology, 401–14. Elsevier, 1987. http://dx.doi.org/10.1016/b978-0-444-42876-9.50037-3.

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Tao, J., S. Li i H. Zhang. "Research on the cracking control and pumpability of HPC in S-C segment of Sutong Bridge". W Tailor Made Concrete Structures, 113. CRC Press, 2008. http://dx.doi.org/10.1201/9781439828410.ch76.

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Streszczenia konferencji na temat "Pumpability"

Rossi, Albert. "Refinery/Additive Technologies and Low Temperature Pumpability". W 1988 SAE International Fall Fuels and Lubricants Meeting and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1988. http://dx.doi.org/10.4271/881665.

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Rossi, Albert. "Wax and Low Temperature Engine Oil Pumpability". W 1985 SAE International Fall Fuels and Lubricants Meeting and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1985. http://dx.doi.org/10.4271/852113.

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Lu, Ping, Shengrong Xu i Mingyao Zhang. "Preparation and Pumping Characteristics of Coal Water Paste Fired Into PFBC". W 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78078.

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Water seepage properties of coal water paste (CWP) under pressure are studied experimentally; the influences of particle size distribution, water content and limestone on the pumping properties of CWP are analyzed. By analyzing the pile pattern of coal particles and flowing properties of CWP in pipe, a novel method for evaluation coal water paste pumpability based on combination of the slump index and the amount of water seepage under pressure is proposed. It is found that the optimum mass ratio of coarse coal powders to the fines is 60:40 for Xuzhou coal of 0∼6 mm, coal water paste pumpability can be described by two indices, namely the slump index and the total water seepage quantity under pressure. The CWP with a good pumpability has a slump in the range of 80∼240mm. The corresponding relative water seepage rate and water seepage quantity are S10 ≤ 40% and V = 70∼110 ml, respectively.

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Papke, B. L., M. A. Dahlstrom, C. T. Mansfield, J. C. Dinklage i D. J. Rao. "Deterioration in Used Oil Low Temperature Pumpability Properties". W International Fuels & Lubricants Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-2942.

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Rossi, Albert. "Lube Basestock Manufacturing Technology and Engine Oil Pumpability". W 1994 Subzero Engineering Conditions Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/940098.

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Luo, Chao, Zhifa Yan, Huiwen Lin, Rui Chen, Jianzhong Liu, Fangyu Han, Hongtao Li i in. "Review on Flow Characteristic and Pumpability Prediction of Pumping Concrete". W IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/nanjing.2022.0662.

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<p>Pumping is the most commonly used construction method for modern concrete transportation and pouring. This paper summarizes the theoretical and experimental research results on the flow behavior characteristics and pumpability prediction of pumped concrete. The formation mechanism of lubrication layer based on shear induced particle migration theory is introduced, and the distribution of concrete shear rate and flow rate in the pipeline is analysed. This paper discussed three prediction methods of concrete pumpability, including empirical judgment, coil test and pumping resistance calculation. Thus, the cognition of concrete pumping process can be improved and reference for engineering and technical personnel in pumping construction can also be provided.</p>

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Alkindi, Tawaddod, Mozah Alyammahi i Rahmat Agung Susantyoko. "Investigation and Characterization of Clay Mixture Feedstock for Extrusion-Based Additive Manufacturing". W ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23715.

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Abstract The extrusion-based AM technique has been recently employed for rapid ceramic components fabrication due to scalability and cost-efficiency. This paper investigated aspects of the extrusion technique to print ceramic materials. Specifically, we assessed and developed a process recipe of the formulations (the composition of water and ethanol-based clay mixtures) and mixing processes. Different clay paste formulations were prepared by varying clay, water, ethanol ratios. The viscosity of clay paste was measured using a DV3T Viscometer. Afterward, the produced clay paste was used as a feedstock for WASP Delta 60100 3D printer for computer-controlled extrusion deposition. We evaluated the quality of the clay paste based on (i) pumpability, (ii) printability, and (iii) buildability. Pressure and flow rate were monitored to assess the pumpability. The nozzle was monitored for continuous material extrusion to assess printability. The maximum layer-without-collapse height was monitored to assess the buildability. This study correlated the mixture composition and process parameters, to the viscosity of the mixture, at the same printing speed. We found that 85 wt% clay, 5 wt% water, 10 wt% ethanol paste formulation, with the viscosity of 828000 cP, 202400 cP, 40400 cP at 1, 5, and 50 rpm, respectively, demonstrates good pumpability, as well as best printability and buildability.

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Rossi, Albert. "Refinery/Additive Technologies and Low Temperature Engine Oil Pumpability". W 1989 Subzero Engineering Conditions Conference and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1989. http://dx.doi.org/10.4271/890034.

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Frame, E. A., A. F. Montemayor i E. C. Owens. "Low-Temperature Pumpability of U.S. Army Diesel Engine Oils". W 1989 SAE International Fall Fuels and Lubricants Meeting and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1989. http://dx.doi.org/10.4271/892053.

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Mc Geehan, J. A., i K. L. Eiden. "Low Temperature Oil Pumpability in Emission Controlled Diesel Engines". W CEC/SAE Spring Fuels & Lubricants Meeting & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-1989.

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Raporty organizacyjne na temat "Pumpability"

Frame, Edward A., Alan F. Montemayor i Edwin C. Owens. Low-Temperature Pumpability of U.S. Army Diesel Engine Oils. Fort Belvoir, VA: Defense Technical Information Center, grudzień 1987. http://dx.doi.org/10.21236/ada197847.

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Frame, E. A., i W. E. Likos. Low-Temperature Oil Pumpability Investigations in a 6.2L Diesel Engine. Fort Belvoir, VA: Defense Technical Information Center, sierpień 2000. http://dx.doi.org/10.21236/ada382457.

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Adams, Caitlin J., Baishakhi Bose, Ethan Mann, Kendra A. Erk, Ali Behnood, Alberto Castillo, Fabian B. Rodriguez, Yu Wang i Jan Olek. Superabsorbent Polymers for Internally Cured Concrete. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317366.

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Two commercial superabsorbent polymer (SAP) formulations were used to internally cure cement pastes, mortars, and concretes with a range of water-to-cement ratios (w/c 0.35–0.52). The following properties were determined as a function of cement chemistry and type, use of chemical admixtures, use of slag, and batching parameters: SAP absorption capacity, fresh mixture workability and consistency, degree of hydration, volumetric stability, cracking tendency, compressive and flexural strength, and pumpability. SAP internal curing agents resulted in cementitious mixtures with improved hydration, accelerated strength gain, greater volumetric stability, and improved cracking resistance while maintaining sufficient workability to be pumped and placed without sacrificing compressive or flexural strength. When using SAP, batching adjustments prioritized the use of water reducing admixture instead of extra water to tune workability. While the benefits of SAP internal curing agents for low w/c mixtures were expected, SAP-containing mixtures with w/c ≥ 0.42 displayed accelerated strength development and decreased cracking tendency.

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