This research aims to study silica fume and liquid polymers (Styrene Butadiene Rubber (SBR)) on absorption and some mechanical properties of concrete like compressive strength, tensile strength, and flexural strength of concrete containing waste aggregates. The aim for using silica fume powder is to increase the strength of concrete by reaction of this material with silicates hydroxide that liberates from the hydration of cement. This reaction gives additional cement gel that fills the pores inside cement paste and gives higher strength, less absorption concrete, and more durable concrete. Using the waste aggregates in this study has two benefits: the decrease in concrete cost. Secondly, it is higher mechanical properties by using glass aggregates because of its properties that have zero absorption compared with normal aggregates and higher strength of glass that give concrete additional strength and durability. The effect of silica fume only on concrete was given a 61% increment in compressive strength. However, with polymers together give about 72% increment, flexural strength increased from 3.8 MPa for reference mixes to 10.5 MPa for silica fume mixes and 12.3 MPa for polymer-silica mixes. The absorption decreases from 6.01% to 2.85% for silica mixes and to 1.5% for polymer-silica mixes. SBR can give additional bonds between cement particles or gel with external silica of aggregates and decrease voids inside concrete. So, the use of both silica fume and polymers can give extra bond and strength and fewer voids concrete, and these are the main aims of using both materials in this study. Hence, these findings could be beneficial for manufacturers and builders.

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L. A. Alasadi, A. A. Alkraidi, Q. A. Alatiyah, “Effect of silica fume and polymers on absorption and some mechanical properties of concrete contains waste aggregates,” International Journal of Technology and Engineering Studies, vol. 4, no. 6, pp. 233-242, 2018.