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[1]屠艳平,程子扬,邓 丽*,等.纳米SiO2对橡胶再生水泥胶砂性能的影响[J].武汉工程大学学报,2022,44(03):341-345.[doi:10.19843/j.cnki.CN42-1779/TQ.202109006]
 TU Yanping,CHENG Ziyang,DENG Li*,et al.Effect of Nano-SiO2 on Properties of Rubber-Recycled Cement Mortar[J].Journal of Wuhan Institute of Technology,2022,44(03):341-345.[doi:10.19843/j.cnki.CN42-1779/TQ.202109006]
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纳米SiO2对橡胶再生水泥胶砂性能的影响(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
44
期数:
2022年03期
页码:
341-345
栏目:
资源与土木工程
出版日期:
2022-06-30

文章信息/Info

Title:
Effect of Nano-SiO2 on Properties of Rubber-Recycled Cement Mortar
文章编号:
1674 - 2869(2022)03 - 0341 - 05
作者:
屠艳平程子扬邓 丽*程书凯徐 雄陈国夫
武汉工程大学土木工程与建筑学院,湖北 武汉 430074
Author(s):
TU YanpingCHENG ZiyangDENG Li*CHENG ShukaiXU XiongCHEN Guofu
School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430074,China
关键词:
橡胶再生水泥胶砂再生细骨料纳米SiO2抗压强度
Keywords:
rubber-recycled cement mortar recycled fine aggregate nano-SiO2 compressive strength
分类号:
TU528
DOI:
10.19843/j.cnki.CN42-1779/TQ.202109006
文献标志码:
A
摘要:
采用纳米SiO2对水泥进行等质量替代,研究其对橡胶再生水泥胶砂(RRCM)抗压强度、抗折强度和折压比的影响,同时采用扫描电子显微镜对RRCM的微观结构形貌进行表征。结果表明:橡胶颗粒和再生细骨料(RFA)会降低水泥胶砂(CM)的抗压强度、抗折强度和折压比,导致CM的延性变差;纳米SiO2替代水泥后,RRCM的抗压强度、抗折强度和折压比得到显著提升,且其微观结构更加致密;当纳米SiO2的替代率为3%时,RRCM的28 d的抗压强度、抗折强度、折压比分别提升14.1%、39.7%、22.5%,水泥砂浆和RFA之间的界面过渡区更加密实,水化产物分布均匀,孔隙明显减少,具有较好的力学性能和经济效益。
Abstract:
Compressive strength,flexural strength and flexural-compression ratio of the rubber-recycled cement mortar (RRCM) with nano-SiO2 replacing cement in same content were investigated,and its microstructural morphologies were characterized by scanning electron microscopy. The results indicate that the incorporation of rubber particles and recycled fine aggregates(RFA) reduces the compressive strength,flexural strength,and flexural-compression ratio of cement mortar,leading to the deterioration of the ductility. After the nano-SiO2 is substituted for cement,the compressive strength,flexural strength and flexural-compression ratio of RRCM are significantly improved,and its microstructure is more compact. When the substitution rate of nano-SiO2 is 3%,the compressive strength,flexural strength and tensile compression ratio of RRCM in 28 d increase by 14.1%,39.7% and 22.5% respectively,the interface transition zone between cement mortar and RFA is more compact,the hydration products are evenly distributed,and the pores are obviously reduced,proving that the RRCM has better mechanical properties and economic benefits.

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相似文献/References:

备注/Memo

备注/Memo:
稿日期:2021-09-04
基金项目:武汉工程大学第十二届研究生教育创新基金(CX2020109);武汉工程大学校内科学基金(K201932&K2021031)
作者简介:屠艳平,博士,副教授。E-mail:121552188@qq.com
*通讯作者:邓 丽,硕士,助理实验师。E-mail:879619616@qq.com
引文格式:屠艳平,程子扬,邓丽,等.纳米SiO2对橡胶再生水泥胶砂性能的影响[J]. 武汉工程大学学报,2022,44(3):341-345.

更新日期/Last Update: 2022-06-29