Study of Mechanical Properties and Water Absorption of High-Strength Concretes Containing Nano-Silica, Micro-Silica, Metakaolin and Glass Powder

Due to the wide spread using of concrete and concrete structures, as well as developing the use of additives in concrete, investigation in such area is very important. In this paper with the design and manufacture of high-strength concrete containing nano-silica, micro-silica, metakaolin and glass waste powder, the properties and effects of these materials when participate with cement type 2 reactions have been analyzed and criticized. Mechanical properties such as tensile strength and flexural strength at the age of 28 days, compressive strength at ages of 7, 28, 56 and 90 days and water absorption at the age of 90 days, have been examined. The obtained results indicate an improvement in the flexural strength of the majority of mix designs and also promote the compressive strength of mix designs containing nano-silica and metakaolin compared with control samples. The nano-silica, micro-silica, metakaolin and glass powder in all percentages caused to reduce water absorption relative to control sample. Due to the environmental and economic considerations associated with using glass powder in the aspect of long-term negative effects of this material on the compressive strength of concrete, its disadvantage is negligible.