...% substitutions of FA for sand, the workability, compressive strength and split tensile strength were evaluated and compared with conventional concrete. The results showed that replacing 40% of sand with FA increased the split tensile strength by 15.45%, increased the compressive strength by 29.94% and reduced...

...He-Xiang Wu; Wen-Xu Yang; Shuang-Xin Li; Yun-Peng Zhao; Quan-Sheng Sun The effects of different dosages of expanded perlite (as a carrier for bacteria) and nanosilica on the strength and self-healing properties of cement mortar were investigated. The strengths of specimens at different curing ages...

.... Aqueous solutions were prepared, using a wet-dispersion technique to disperse GNPs in the mixing water. Concrete batches were prepared using different GNP fractions (0.05, 0.1, 0.25, 0.5, 1 and 2% by weight of cement), and their compressive, flexural and tensile strengths were determined at 28 days...

...Hui Li; Li Li; Ning Zhang; Qi Feng Using geopolymer composites to reduce the use of Portland cement can decrease carbon dioxide emissions. The focus of this study was on improving the strength of a geopolymer composite by assessing the positive hybrid effect of nano-calcium carbonate (NCC...