Date of Publication: 01-Jul-2017
EFFECT OF FINENESS MODULUS OF MANUFACTURED SAND ON DURABILITY CHARACTERSTICS OF SELF COMPACTING CONCRETE
Author: D.Pavan kumar* C.Sashidhar**
Category: Engineering, Science and Mathematics
Self compacting concrete (SCC) is defined as a flowable concrete highly applicable fr congested reinforced structural elements and high durablity. SCC requires high finer particles to attain liquid flow without any external pressure application. Natural river sand consumption is highly increasing due to rapid growth of construction industry and creating several environmental issues and as alternate to natural sand manufactured sand (MSand) is being used as fine aggregate. This research is mainly concentrated on gradation of fine aggregate to get required durability by examine the effect of different fineness modulus (FM) of MSand (2.5, 2.7 and 2.9) on the durability characterstics of SCC with blending of binding materials as SCC_25FA_10SF; SCC_25FA_10SF and SCC_25FA_5SF_5MK. The test methods adopted to evaluate the durability charcters are water absorption and rapid chloride permeability test after curing periods of 28, 56 and 112 days. Results showed that the durability charcterstic values of SCC with FM value of 2.7 aquired better results than other FM values. Hence, it is concluded that proper gradation of finer and coarser fractions of MSand has to be maintained to attain desired durability charcterstics in SCC at hardened state.
Keywords: Self compacting concrete; Manufactured sand; Fineness modulus; Mechnical properties;