Civil Engineering Horizon - application of retarding admixture in hot weather by S K Ahmad

The fresh concrete should have a suitable composition in terms of quality and quantity of cement, aggregate, water and admixtures in order to achieve good performance in terms of shape, finish, strength, durability, shrinkage and creep. It should also satisfy a number of requirements from the mixing stage till it is transported, placed in formwork and compacted. Concreting in hot weather is a challenge to the construction industry. There is a need to design optimum concrete mixes in an era of economically tight policies. The use of admixture offers an improvement not economically attainable by adjusting the proportion of cement and aggregates. This paper has been devoted to the study of the influence of a retarding admixture on the properties of fresh and hardened concrete, like water absorption, porosity, density of concrete, compressive strength, flexure strength, and workability etc. This study has provided results, which show remarkable improvement in different properties of concrete in fresh and hardened state, and should be very helpful for designing an economical concrete mix for hot weather conditions.

Keywords: admixture, water absorption, density, porosity, compressive strength, concrete mix, hot weather

Abstract Introduction Methodology Result Discussion Conclusions References

Date of Publication of this paper: 02 April 2011 Comments open till: 01 October 2011

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