Effects of TEAHCl hardening accelerator on the workability of cement-based materials

17th IUMRS International Conference in Asia

Pan, Wenhao^1 ; Ding, Zhaoyang^2 ; Chen, Yanwen^1

School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang

110168, China^1

Test and Analysis Center, Shenyang Jianzhu University, Shenyang

110168, China^2

关键词: Bleeding rate;    Cement based material;    Cement hydration;    Experimental analysis;    Fluidity of cement paste;    Influence rule;    Initial setting time;    Practical engineering;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/182/1/012046/pdf
DOI  :  10.1088/1757-899X/182/1/012046

来源: IOP

【 摘 要 】

The aim of the test is to research the influence rules of TEA•HCl on the workability of cement paste and concrete. Based on the features of the new hardening accelerator, an experimental analysis system were established through different dosages of hardening accelerator, and the feasibility of such accelerator to satisfy the need of practical engineering was verified. The results show that adding of the hardening accelerator can accelerate the cement hydration, and what's more, when the dosage was 0.04%, the setting time was the shortest while the initial setting time and final setting time were 130 min and 180 min, respectively. The initial fluidity of cement paste of adding accelerator was roughly equivalent compared with that of blank. After 30 min, fluidity loss would decrease with the dosage increasing, but fluidity may increase. The application of the hardening accelerator can make the early workability of concrete enhance, especially the slump loss of 30 min can improve more significantly. The bleeding rate of concrete significantly decreases after adding TEA•HCl. The conclusion is that the new hardening accelerator can meet the need of the workability of cement-based materials in the optimum dosage range.