Abstract
Abstract Concrete is one of the most extensively utilized building materials that can be produced, and has the potential to release a significant quantity of CO2 into the environment. In this research, through studying lightweight (LW) concrete, attempts are made to produce environmentally friendly LW concrete with high strength using nanosilica rather than part of the cement and waste glass powder instead of aggregates. Recycled polypropylene fibers are used to increase the concrete’s compressive strength and nonlinear behavior. The use of glass powder was 20, 25, and 30% of the weight of aggregates, the consumption of nanosilica was 1, 2, and 3% of the weight of cement, and the consumption of recycled fibers (FORTA Ferro-Green) was 0.5, 1, and 1.5% of the weight of cement. Leca is also utilized as a LW aggregate. According to 7- and 28-day experimentation results and field emission scanning electron microscope analysis, the best sample had 1.5% fiber, 3% nanosilica, and 25% waste glass powder, and had a compressive and tensile strengths of roughly 1.7 and 1.6 times, respectively, those of the control specimen after 28 days. Also, using 3% nanosilica instead of cement can reduce greenhouse gas emissions by about 3%.
Highlights
The amount of CO2 produced during manufacturing of the ordinary Portland cement (OPC) is 7% of total wastes generated in the atmosphere
The increase in compressive strength has been studied by a researcher [3,5], where it has been shown that the addition of nanoparticles as a partial replacement for cement decreases the amount of corrosion; it has been found that using nanoparticles in ordinary concrete has many advantages
They found that the compressive strength increases with the age of specimens, and this increase in strength has a higher rate at an early age, but it decreases with time
Summary
The amount of CO2 produced during manufacturing of the ordinary Portland cement (OPC) is 7% of total wastes generated in the atmosphere. The results of compressive strength tests performed on the specimens showed that the specimens containing nanosilica (at 3%) exhibited a higher compressive strength than those which lacked nanosilica (with the same replaced nanosilica percentages instead of LW material) at different ages (3, 7, 28, and 90 days). The authors applied 4 nanosilica percentages of 0, 1, 2, and 3% to examine its effect on the shrinkage, compressive strength, and sensitivity to the formation of initial cracks in the LW concrete specimens prepared with two aggregate types They found that the compressive strength increases with the age of specimens, and this increase in strength has a higher rate at an early age, but it decreases with time. After making compressive and tensile specimens and performing slump tests, the specimens are tested according to the standard after 7 days and 28 days, and their results are evaluated
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
