Multi-layer casting of self-consolidating concrete: Influence of mortar rheology and casting parameters on the inter-layer bond strength

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2021
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Abstract
Inter-layer bond strength is a critical factor to achieve structurally sound monolithic concrete structures. This paper discusses the effects of the cementitious paste volume (CP%vol), structural build-up of mortar (Athixm), and their interactions with casting parameters (i.e., free fall height (HFF), and delay time) on the residual bond strength of multi-layer self-consolidating concrete. It is found that the residual bond strength can be improved by increasing the CP%vol and HFF, or by reducing the delay time and Athixm. Out of the factors investigated, Athixm has the largest effect on both the residual bond strength and the critical delay time.
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Workability, Rheology, Structural build-up, Self-consolidating concrete, Supplementary cementitious materials, Mineral admixtures, Inter-layer bond strength
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https://doi.org/10.1016/j.conbuildmat.2021.124492
 https://repositorio.uc.cl/handle/11534/87158
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