当前位置: X-MOL 学术Struct. Concr. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of age and waste crumb rubber aggregate proportions on flexural characteristics of self-compacting rubberized concrete
Structural Concrete ( IF 3.2 ) Pub Date : 2021-03-17 , DOI: 10.1002/suco.202000597
Dimuthu Wanasinghe 1 , Farhad Aslani 1 , Kunyou Dai 1
Affiliation  

Generation of waste has been a significant problem in recent decades in many engineering fields. Self-compacting rubberized concrete (SCRC) is a new type of SCC, which replaces part of natural aggregates by rubber aggregates in SCC to increase the application range of waste tyre rubber. This study investigates the effect of age and crumb rubber aggregate ratio on fresh and mechanical performance. Eight different SCRC mixtures using 2–5 mm rubber aggregates to replace 10%, 20%, 30%, and 40% natural aggregates by volume respectively, and 5–10 mm rubber aggregates to replace 10%, 20%, 30%, and 40% natural aggregates by volume respectively, are tested after 7, 28, 56, and 91 days for their mechanical properties. Results show that both the compressive and the tensile strength increase with the aging time, both of these properties drop with the amount and size of the crumb rubber content. Similar to compressive and tensile properties, flexural toughness and the modulus of rupture showed increased with the aging time. Small addition of crumb rubber has shown improvements in both rupture and fracture toughness properties, which diminishes when the crumb rubber content becomes significantly large.

中文翻译:

年龄和废碎橡胶骨料配比对自密实橡胶混凝土抗弯特性的影响

近几十年来,在许多工程领域中,废物的产生一直是一个重大问题。自密实橡胶混凝土(SCRC)是一种新型的SCC,它在SCC中用橡胶骨料代替部分天然骨料,增加废旧轮胎橡胶的应用范围。本研究调查了年龄和碎胶骨料比例对新鲜和机械性能的影响。八种不同的 SCRC 混合物,分别使用 2-5 毫米橡胶骨料替代 10%、20%、30% 和 40% 的天然骨料(按体积计),使用 5-10 毫米橡胶骨料替代 10%、20%、30% 和分别按体积计算 40% 的天然骨料,分别在 7、28、56 和 91 天后测试其机械性能。结果表明,随着老化时间的延长,抗压强度和抗拉强度均增加,这两种性能都随着碎橡胶含量的数量和大小而下降。与压缩和拉伸性能相似,弯曲韧性和断裂模量随着老化时间的增加而增加。少量添加粒状橡胶已显示出断裂和断裂韧性性能的改进,当粒状橡胶含量变得非常大时,这种改善会降低。
更新日期:2021-03-17
down
wechat
bug