Abstract :
In this present study an investigation was made on the durability performance of concrete containing fly-ash
as partial replacement with cement and copper slag has replacement of fine aggregate in concrete. The concrete mix
design was prepared for M30 grade. Six concrete mixes were prepared in which cement is partially replaced by flyash
about 40% by weight of the total binder content, with 20% increment of copper slag in consecutive mixes ranging
from 0-100% replacement on fine aggregate in all the mix proportions. The mixes were evaluated to find out the
mechanical properties and durability performance of concrete by conducting various tests like compression test, split
tensile test for mechanical properties and carbonation, sorptivity, ultra-sonic pulse velocity, Rapid Chloride
Penetration Test (RCPT) for durability performance. Compressive were evaluated for 56 days and sorptivity and
split tensile strength are evaluated for 28 days. Carbonation results for all the mixtures were change in purple red
color indicate a highly alkaline good concrete. UPSV (Ultra-sonic pulse velocity) results for the mixtures are in the
range of above 4; which indicates the quality of concrete good. Sorptivity values goes on increasing while increasing
the copper slag percentage. So 40% of copper slag replacement with fine aggregate indicates as comparable to that
of control mix. Compressive test result shows that 40% replacement of copper slag with fine aggregate indicates as
comparable to that of control mix further amount of increase in copper slag percentage indicates decrease in strength.
The maximum strength achieved at 40% replacement of copper slag which shows that the optimum percentage of
replacement in concrete.
Keyword :
Copper slag, Durability performance, Mechanical properties, Fly-ash.