| Issue |
E3S Web Conf.
Volume 338, 2022
7th International Conference on Environmental Science and Material Application (ESMA 2021)
|
|
|---|---|---|
| Article Number | 01024 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.1051/e3sconf/202233801024 | |
| Published online | 20 January 2022 | |
The Key Application Technology of Desulfurized Gypsum in Dry-Mixed Mortar
Changji State Product Quality Inspection Institute ChangJi XinJiang 831100 China
* Corresponding author: 471268185@qq.com
In this paper, in view of the problem of low early and late strength of dry-mixed mortar prepared by cement-fly ash-slag powder composite cementing system, the ratio of mixing fly ash and slag powder to replace cement is 70%. To study the effect of desulfurization gypsum (FGD) on improving the activity of the system. The results show that adding desulfurized gypsum, which accounts for 6% to 8% of the total mass of the cementitious material, has no adverse effect on the workability and can significantly improve the compressive resistance of the slurry. Strength and tensile bonding strength, shrinkage rate is reduced by more than 10%, and the ability to resist carbonization is improved to make the mortar volume more stable.
Key words: Desulfurized gypsum / dry-mix mortar / fly ash / slag powder
© The Authors, published by EDP Sciences, 2022
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