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

• Published in: IOP conference series. Materials Science and Engineering Vol. 439; no. 4; pp. 42055 - 42060
• Main Authors: Linmin, Yuchen, Guo, Beisi, Tian, Yunlian, Song
• Format: Journal Article
• Language: English
• Published: IOP Publishing 09.11.2018
• ISSN: 1757-8981; 1757-899X; 1757-899X
• DOI: 10.1088/1757-899X/439/4/042055

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.