Authors : Amr Elsaid and Maged Tawfik
Abstract: In this study, an experimental investigation on the use of nano silica using the macro-fiber reinforcement on the compressive and tensile strength. The percent of nano silica is 3% from the cement content and the weight of macro-fiber reinforcement were zero, 3 and 5 kg m–3. All tests were performed at 28 and 56 days. Nano-silica is used as partial replacement of cement. Further investigation was carried out by addition of macro-fiber reinforcement for the same percentage of nano silica (3%) of cement in the same mix. Compressive and split tensile strength of these mixes were measured and compared with the control concrete specimens. The experimental test results showed that concrete prepared with (3%) nano silica showed a good comparable strength (either compressive or splitting tensile) than the other two concrete mixes of 10% of silica fume or combined nano silica concrete. The test results showed also that there is a decrease in ratio of tensile to compressive strength as cement content increased for both 10% silica fume concrete and 1% nano silica concrete due to the more increase in compressive strength gain.
Amr Elsaid and Maged Tawfik, 2021. Characteristics of Nano-Silica Concrete with Macro-Fiber Reinforcement. Journal of Engineering and Applied Sciences, 16: 1-5.