当前位置: X-MOL 学术Eur. J. Environ. Civ. Eng. › 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.)
Properties of concrete containing Guar gum
European Journal of Environmental and Civil Engineering ( IF 2.1 ) Pub Date : 2020-05-28 , DOI: 10.1080/19648189.2020.1767217
Tara Radvand 1 , Vahab Toufigh 2
Affiliation  

Abstract

This study explores the effect of Guar gum as an eco-friendly additive on concrete mechanical characteristics. In the first stage, the slump and relative humidity tests were carried out for the fresh mortar, and tensile and compressive strengths were then determined for fifteen different mixture designs with two different curing times. Further, an exponential correlation was obtained between the ultrasonic pulse velocity and the compression test results. Additionally, scanning electron microscope (SEM) was employed to assess the bond between aggregates and Guar gum. At last, the Taguchi method and ANOVA were utilized to conduct the optimum states of the mechanical characteristics of the concrete specimens and to estimate the contribution of each effective factor on their mechanical properties, respectively. The findings indicate that concrete compressive and tensile strengths are enhanced when displacing up to 0.8 percent of cement with Guar gum which is effective in achieving a sustainable and eco-friendly mixture. Moreover, in the presence of Guar gum, an increase in water to cement ratio negatively affects the mechanical properties of concrete by decreasing compressive and tensile strengths. Finally, the SEM results reveal the fact that concrete morphological characteristics are altered due to the formation of Guar gum strings.



中文翻译:

含瓜尔胶混凝土的性能

摘要

本研究探讨了瓜尔豆胶作为环保添加剂对混凝土力学特性的影响。在第一阶段,对新鲜砂浆进行坍落度和相对湿度测试,然后确定 15 种不同混合料设计和两种不同固化时间的抗拉强度和抗压强度。此外,在超声脉冲速度和压缩试验结果之间获得了指数相关性。此外,使用扫描电子显微镜 (SEM) 来评估聚集体和瓜尔豆胶之间的结合。最后,利用田口法和方差分析对混凝土试件的力学特性进行了优化,并分别估计了各有效因素对其力学性能的贡献。研究结果表明,当用瓜尔胶置换高达 0.8% 的水泥时,混凝土的抗压和抗拉强度会提高,这对于实现可持续和环保的混合物是有效的。此外,在瓜尔胶存在的情况下,水灰比的增加会降低混凝土的抗压强度和抗拉强度,从而对混凝土的力学性能产生负面影响。最后,SEM 结果揭示了混凝土形态特征由于瓜尔胶串的形成而改变的事实。水灰比的增加会降低混凝土的抗压强度和抗拉强度,从而对混凝土的力学性能产生负面影响。最后,SEM 结果揭示了混凝土形态特征由于瓜尔胶串的形成而改变的事实。水灰比的增加会降低混凝土的抗压强度和抗拉强度,从而对混凝土的力学性能产生负面影响。最后,SEM 结果揭示了混凝土形态特征由于瓜尔胶串的形成而改变的事实。

更新日期:2020-05-28
down
wechat
bug