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| Study on the Use of Desulfurized Gypsum as Modifier of Mineral Admixtures in Dry-mixed Mortar |
| 1. Ruzhou Dongjiang Construction Industry Technology Co., Ltd. , Ruzhou Henan 467500, China; 2. Tianrui Group Cement Co., Ltd. , Ruzhou Henan 467500, China |
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Abstract The effects of desulfurized gypsum on the properties of modified fly ash and slag powder composite admixtures, and the structural properties of low-cement-high admixture dry-mixed mortar containing desulfurized gypsum were studied experimentally. The test results show that the modified mineral admixture is beneficial to improve the early and late strength of dry-mixed mortar. The addition amount is 5%~7%; the modified mineral admixture can improve the internal structure of the mortar and increase the number of harmless pores; the properties of the prepared mortar can meet the requirements of the JG/T 230 2007 standard. Compared with mixed mortar, the cost is reduced by more than 10%.
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Received: 24 November 2021
Published: 25 July 2022
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