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Workability and strength behaviour of concrete with cold-bonded fly ash aggregate

Abstract

This paper discusses the development of empirical models for workability and compressive strength of cold-bonded fly ash aggregate concrete in terms of mixture proportioning variables such as cement content, water content and volume fraction of cold-bonded aggregate through statistically designed experiments based on Response Surface Methodology. Factor level of cement is taken from 250 to 450 kg/m3 to introduce weak as well as strong matrix phase in the concrete. Apart from water content, workability of concrete is highly influenced by main and interaction effect of volume fraction of cold-bonded aggregate in the composition. Response surface indicate that increase in cement content causes to change the predominant failure mode from mortar failure to aggregate fracture and concrete strength decreases with increase in volume fraction of aggregate at higher cement contents. The models developed have been found useful in arriving typical relationship to establish a mixture proportioning methodology for cold-bonded fly ash aggregate concrete.

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Correspondence to K. Ramamurthy.

Appendix

Appendix

Table A1 Details of mix proportioning used
Table A2 Model equations for workability
Table A3 Model equations for Compressive strength

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Joseph, G., Ramamurthy, K. Workability and strength behaviour of concrete with cold-bonded fly ash aggregate. Mater Struct 42, 151–160 (2009). https://doi.org/10.1617/s11527-008-9374-x

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  • DOI: https://doi.org/10.1617/s11527-008-9374-x

Keywords

  • Cold-bonded aggregate
  • Response surface
  • Mixture proportioning
  • Workability
  • Compressive strength