硅粉
抗弯强度
材料科学
复合材料
抗压强度
水泥
聚丙烯
延展性(地球科学)
蠕动
作者
Erfan Najaf,Hassan Abbasi,Seyed Mehdi Zahrai
出处
期刊:International Journal of Structural Integrity
[Emerald (MCB UP)]
日期:2022-05-09
卷期号:13 (3): 511-533
被引量:24
标识
DOI:10.1108/ijsi-03-2022-0039
摘要
Purpose Today, using lightweight structural concrete plays a major role in reducing the damage to concrete structures. On the other hand, lightweight concretes have lower compressive and flexural strengths with lower impact resistance compared to ordinary concretes. The aim of this study is to investigate the effect of simultaneous use of waste glass powder, microsilica and polypropylene fibers to make sustainable lightweight concrete that has high compressive and flexural strengths, ductility and impact resistance. Design/methodology/approach In this article, the lightweight structural concrete is studied to compensate for the lower strength of lightweight concrete. Also, considering the environmental aspects, microsilica as a partial replacement for cement, waste glass powder instead of some aggregates and polypropylene fibers are used. Microsilica was used at 8, 10 and 12 wt% of cement. Waste glass powder was added to 20, 25 and 30 wt% of aggregates, while fibers were used at 0.5, 1 and 1.5 wt% of cement. Findings After making the experimental specimens, compressive strength, flexural strength and impact resistance tests were performed. Ultimately, it was concluded that the best percentage of used microsilica and glass powder was equal to 10 and 25%, respectively. Furthermore, using 1.5 wt% of fibers could significantly improve the compressive and flexural strengths of lightweight concrete and increase its impact resistance at the same time. For constructing a five-story building, by replacing cement with microsilica by 10 wt%, the amount of used cement is reduced by 5 tons, consequently producing 4,752 kg less CO 2 that is a significant value for the environment. Originality/value The study provides a basis for making sustainable lightweight concrete with high strength against compressive, flexural and impact loads.
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