Study on early strength agent for improving early strength performance of water-stabilized macadam material

2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

材料科学;无线电电子学;计算机科学

Linmin^1 ; Yuchen, Guo^1 ; Beisi, Tian^2 ; Yunlian, Song^1

School of Civil Engineering, Inner Mongolia University of Technology, Hohhot

010051, China^1

Chang'An University, Xi'an

710064, China^2

关键词: Anhydrous sodium sulfate;    Blank control group;    Cement-stabilized macadam;    Correlation analysis;    Performance of cement;    Shrinkage cracks;    Triethanolamines;    Unconfined compression tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/439/4/042055/pdf
DOI  :  10.1088/1757-899X/439/4/042055

来源: IOP

【 摘 要 】

Because triethanolamine (TEA) and anhydrous sodium sulfate (Na2SO4) can both improve the performance of cement stabilized macadam material, an optimal dosage group is found by compounding the two materials to improve the dry shrinkage performance of cement stabilized macadam material. Based on unconfined compression test and dry shrinkage strain test, the changes of compressive strength of water-stabilized macadam materials caused by different compound dosage groups and original materials were compared. The results show that the three dosage groups can improve compressive strength and reduce the dry shrinkage strain of the cement stabilized macadam material. The compressive strength of 2.0 % anhydrous sodium sulfate and 1.0 % triethanolamine was the best, increasing 73.8 %; moreover, the dosage group can effectively reduce shrinkage cracks, which is 3.88 % less than that of the blank control group. The test data were tested by correlation analysis and there were significant differences between the control group and each dosage group, which indicated that the admixture had a significant improvement on the material properties.