Structural

Advances in Cement-Based Materials: Proc. Int. Conf. by Gideon P.A.G. Van Zijl, Billy P. Boshoff

By Gideon P.A.G. Van Zijl, Billy P. Boshoff

Collection of chosen papers on present advances in excessive functionality development fabrics. Contributions care for the improvement, characterization, program systems, functionality and structural layout of fabrics with key strength in civil engineering works. fabrics handled are fibre bolstered concrete, excessive functionality concrete, self compacting concrete and novel combos of those. For researchers, practitioners, experts, contractors and suppliers.

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Additional resources for Advances in Cement-Based Materials: Proc. Int. Conf. Advanced Concrete Materials, 17-19 Nov. 2009, Stellenbosch, South Africa

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D. Stults, R. C. S. Rushing US Army Engineer Research and Development Center, Vicksburg, MS, USA ABSTRACT: Rice husk ash (RHA) has been observed to greatly improve both the mechanical and durability performance of conventional concrete mixtures, including increases in compressive strength while improving resistance to chloride ion transport and decreased permeability. This study explores the effects of using RHA as a mineral admixture in an ultra-high-performance concrete (UHPC) matrix, for which very high compressive strengths have already been achieved through dense particle packing and selection of materials.

Mechtcherine, V. et al. 2006. Internal curing by Super Absorbent Polymers—Effects on material properties of self-compacting fibre-reinforced high performance concrete. M. Jensen et al. , 87–96. , Dudziak, L. & Hempel, S. 2009. Mitigating early age shrinkage of concrete by using Super Absorbent Polymers (SAP). In: CONCREEP-8, T. Tanabe et al. ), Taylor & Francis Group, London, 847–853. Investigations into the effect of internal curing on the microstructure of high-performance concretes are as yet incomplete, and further research is necessary using additional experimental techniques.

When considering the stiffness of the matrices in which cement is replaced by RHA, it will be 27 rice have already been used to generate power and the resulting ash that can be used in concreting applications is then a tertiary use, maximizing the benefit of what would otherwise be waste. noticed that there are some significant decreases. This can be expected since there is less cement and therefore less unhydrated cement in the matrix, which can result in lower modulus, as unhydrated cement has been attributed as a stiffening factor in low water-binder ratio mixtures (O’Neil, 2008).

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