Research on influence of admixtures to the plastic shrinkage cracking of mortar

2018 6th International Conference on Mechanical Engineering, Materials Science and Civil Engineering

材料科学;机械制造;土木建筑工程

Ma, Yiping^1 ; Zhang, Han^1 ; Yu, Shaotong^1 ; Tan, Chang^1^2 ; Yang, Xiaojie^1

Key Laboratory of Advanced Civil Engineering Materials of Education Ministry, Tongji University, Shanghai, China^1

Wuhan Chengxing United Technology Development Co. Ltd., Wuhan, China^2

关键词: Air entraining agents;    Constitutive relations;    Plastic shrinkage;    Plastic shrinkage crackings;    Plastic tensile strength;    Shrinkage reducing agents;    Water-reducing agents;    Water-retaining agents;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/542/1/012002/pdf
DOI  :  10.1088/1757-899X/542/1/012002

来源: IOP

【 摘 要 】

In this paper, the influence of admixture on plastic shrinkage cracking was studied. The results show that the plastic tensile strength increases while plastic shrinkage stress decreases as the content of air-entraining agent grows to 150×10-6 wt.%, and the anti-cracking index increases as a whole. Water reducing agent, water retaining agent, and shrinkage reducing agent all have the effect of improving plastic shrinkage cracking of fresh cement mortar. The constitutive relations between the admixtures content and anti-cracking index have been built.