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EFFECTIVE APPLICATIONS OF RETARDING ADMIXTURE TO IMPROVE THE

PERFORMANCE OF CONCRETE IN HOT WEATHER

 Syed Khaleeq Ahmad

METHODOLOGY

In this study all the results are conducted based on the guidelines of British Standards (BS 5075 and BS1881). The conditions of hot weather are generated by keeping the temperature in the laboratory between 35º and 40ºC.

Concrete cubes of dimension 150mm´150mm´150mm were prepared with proportions of 1:2:4.

Concrete beams  of 100mm ´ 100mm ´ 500 mm were prepared.

The water–cement ratio is kept constant at 0.5.

The coarse aggregate used is well graded. Three types of fine aggregate are used; (i) well graded, (ii) less than 600 mm, (iii) greater than 600 mm.

The admixture is added to the concrete varying from 0.2%-1.2% by weight of cement.

The water added to the concrete is at room temperature.

The strength of concrete is tested after curing for 28 days.

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Last updated on Thursday November 29, 2012