New PDF release: Application of Super Absorbent Polymers (SAP) in Concrete

By Viktor Mechtcherine (auth.), Viktor Mechtcherine, Hans-Wolf Reinhardt (eds.)

ISBN-10: 9400727321

ISBN-13: 9789400727328

This is the state of the art file ready through the RILEM TC “Application of large Absorbent Polymers (SAP) in concrete construction”. It offers a accomplished evaluate of the houses of SAP, particular water absorption and desorption behaviour of SAP in clean and hardening concrete, results of the SAP addition on rheological houses of unpolluted concrete, adjustments of cement paste microstructure and mechanical homes of concrete. moreover, the most important benefits of utilizing SAP are defined intimately: the power of this fabric to behave as an inner curing agent to mitigate autogenous shrinkage of high-performance concrete, the prospect to exploit SAP as a substitute to air-entrainment brokers in an effort to bring up the frost resistance of concrete, and eventually, the advantage of guidance the rheology of unpolluted cement-based fabrics. the ultimate bankruptcy describes the 1st present and various potential purposes for this new concrete additive.

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Additional info for Application of Super Absorbent Polymers (SAP) in Concrete Construction: State-of-the-Art Report Prepared by Technical Committee 225-SAP

Sample text

12] and applied to wood pulp fibers. A number of reference cement pastes with small w/c variations was compared to a mixture with an internal curing agent of unknown absorption. According to [12], the absorption was found when the rate of heat evolution of a reference paste coincided with the one of a paste with internal curing. However, it is difficult to reconcile this approach with evidence that a mixture with internal curing reaches a higher degree of hydration than a reference mixture [13] and is consequently also expected to develop a higher heat of hydration.

J of Building Physics 31(4): 301–318 [40] Wyrzykowski M, Gawin D, Pesavento F (2008) Determining the effective properties of internally cured concrete by means of two-scale modelling. Proc. 6th Int. Conf. Analytical Models and New Concepts in Concrete and Masonry Structures AMCM2008, Łódź, Poland, (on CD), 9–11 June [41] Wyrzykowski M, Lura P, Pesavento F, Gawin D (2011) Modeling of internal curing in maturing concrete. Cem Concr Res 41: 1349–1356 [42] Wyrzykowski M (2010) Modeling coupled thermo-hygral processes in maturing concrete exposed to internal and external curing.

The results showed that the surface/volume ratio of the SAP had the greatest influence on the water delivery rate to the concrete [2]. 3 Two-scale modelling A recently-developed mathematical model for hygro-thermal phenomena in maturing concrete by Gawin et al. [38,39] was applied to the two-scale modelling of internal curing of concrete. A first approach to internal curing by SAP was described in [40]. The effective properties and macroscopic performance of the material were obtained by means of up-scaling the solutions from the mesoscopic level.

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Application of Super Absorbent Polymers (SAP) in Concrete Construction: State-of-the-Art Report Prepared by Technical Committee 225-SAP by Viktor Mechtcherine (auth.), Viktor Mechtcherine, Hans-Wolf Reinhardt (eds.)

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