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

ISBN-10: 9400727321

ISBN-13: 9789400727328

This is the cutting-edge record ready by way of the RILEM TC “Application of great Absorbent Polymers (SAP) in concrete construction”. It provides a accomplished assessment 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 homes of unpolluted concrete, alterations of cement paste microstructure and mechanical homes of concrete. moreover, the main 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 chance to take advantage of SAP instead to air-entrainment brokers as a way to raise the frost resistance of concrete, and eventually, the advantage of steerage the rheology of unpolluted cement-based fabrics. the ultimate bankruptcy describes the 1st current and diverse potential purposes for this new concrete additive.

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

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Mater Struct 39: 861–868 [28] Henkensiefken R, Nantung T, Weiss J (2011) Saturated Lightweight Aggregate for Internal Curing in Low w/c Mixtures: Monitoring Water Movement Using X-ray Absorption. Strain 47(s1): e432–e441 [29] Trtik P, Münch B, Weiss WJ, Kaestner A, Jerjen I, Josic L, Lehmann E, Lura P (2011) Release of internal curing water from lightweight aggregates in cement paste investigated by neutron and X-ray tomography. Nucl Instrum Methods Phys Res A: Accelerators, Spectrometers, Detectors and Associated Equipment 651(1): 244–249 [30] Bentz DP, Halleck PM, Grader AS, Roberts JW (2006) Four-Dimensional X-ray Microtomography Study of Water Movement during Internal Curing.

2 1 0 0 0 5 10 15 20 25 t [hours] Fig. 3 for samples with internal curing by SAP (SAP paste) and for a reference sample (Ref paste). Data from Figure 11 in [21] water inside the SAP decreases almost in parallel with the decrease of the water relaxation time in the cement matrix, while the decrease in the amplitude of the total water signal is still minimal. This may indicate that the water drainage from the SAP is mainly forced by the increase of capillary suction of the matrix which results from the increasing surface-to-volume (S/V) ratio.

Constr Build Mat 23(2): 1141–1146 [12] Johansen NA, Millard MJ, Mezencevova A, Garas VY (2009) New method for determination of absorption capacity of internal curing agents. Cem Concr Res 39(1): 65–68 [13] Lura P, Durand F, Loukili A, Kovler K, Jensen OM (2006) Compressive strength of cement pastes and mortars with superabsorbent polymers. Int. RILEM Conf. Volume Changes of Hardening Concrete, 20-23 August, (Lyngby, Denmark), PRO 52, eds. Jensen, Lura and Kovler, 117–126 [14] Jensen OM (2005) Autogenous Phenomena in Cement-Based Materials, Department of Building Technology and Structural Engineering, Aalborg University, ISBN 87-91606-00-4, 188 pp [15] Mechtcherine V, Dudziak L, Schulze J, Stähr H (2006) Internal curing by Super Absorbent Polymers – Effects on material properties of self-compacting fibre-reinforced high performance concrete.

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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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