EFFECT OF ADMIXTURE ON THE STRENGTH PROPERTIES OF CONCRETE USING TREATEDWASTE WATER WITH VARIABLE SIZE OF AGGREGATES

Abstract

In this research work effect of admixture on strength properties of concrete with 100% treated waste water using variable size of aggregates was studied. The M30 grade of concrete was tested. Variable size of aggregates such as 40 mm graded, 20 mm graded and 10 mm were used .A water reducing admixture namely. Fosroc SP430 G8 was used. Proper aggregate gradation not only ensure a workable concrete mixture that can be compacted easily but also helps to reduce problems such as segregation, bleeding and loss of entrained air and plastic shrinkage cracking. For M30 grade of concrete the compressive strength was achieved easily using 40 mm graded aggregates,20 mm graded aggregates and 10 mm aggregates. The compressive strength achieved highest was using 40 mm aggregates. For flexural strength the results achieved were also appreciable. The flexural strength results using 20 mm graded aggregates were most suitable. For split tensile strength the results which were highest were using 40mm graded aggregates. Lastly for the results of abrasion, the preferred size of aggregates were 40mm graded aggregates. Hence results are satisfactory using treated waste water with variable size of aggregates.