Samir M. Atia; Waleed A. Abbas
Abstract
The great economic development and the growth of modern means of construction have led to the spread of large quantities of chemical admixtures that we must be cautious of. As the world ...
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The great economic development and the growth of modern means of construction have led to the spread of large quantities of chemical admixtures that we must be cautious of. As the world is turning towards environmentally friendly alternatives, finding locally viable solutions is becoming inevitable. The influence of using Nano starches of a biopolymer on certain properties of silica fume concrete in the fresh case (slump and fresh density) and in the hardened case (compressive strength, splitting tensile strength, and flexural strength) has been investigated. It has been added to silica fume concrete in various percentages of (0%, 0.25%, 0.5%, and 0.75%) by cement weight. The mix proportions of concrete mixtures were 1:2.3:2.3, with a fixed w/c of 0.47 and 15 % silica fume added by the weight of cement for all mixers. super plasticizer of 0.75% is also added by the weight of cement for all mixtures. According to the findings, slump increased by 19%, and fresh density increased by 3% when Nano starch was added at a concentration of 0.75%. The optimal level of Nano starch addition was 0.25%, which resulted in a 43% increase in compressive strength and a 34% and 26% increase in splitting tensile and flexural strength of concrete, respectively.
