水泥-矿渣基早强固化剂制备及固化土宏微观性能研究

摘要/Abstract

摘要： 为提高工业废渣的利用率,选用磷石膏、高炉矿渣、硅酸钠代替部分水泥并对土样进行固化处理。通过D-最优混料设计,得出3与7 d的无侧限抗压强度回归方程,并计算得到最优质量配合比。使用最优配方固化土样,测得3和7 d无侧限抗压强度分别达4.88和5.84 MPa。通过因素间交互分析结果,得出固化材料的最优掺量范围。通过X射线衍射和扫描电子显微镜对固化土微观机理进行分析,结果表明最优固化土相比水泥固化土水化反应更完全,颗粒间连接更密实,结构更稳定。最后通过对最优配方进行环境效益与经济性评价,得出该配方在强度、环境效益、经济性等方面均要优于水泥。

关键词: 工业废渣, 早强固化剂, D-最优混料设计, 最优配合比, 无侧限抗压强度, 微观机理

Abstract: In order to improve the utilization of industrial waste residue, phosphogypsum, blast furnace slag and sodium silicate were conducted to replace part of cement stabilize silt. The regression equation of unconfined compressive strength cured for 3 and 7 d was obtained through the D-optimal mixture design, and the optimal mass ratio was calculated. The unconfined compressive strength for 3 and 7 d were separately 4.88 and 5.84 MPa by using the optimal formula to solidified soil samples. The microscopic mechanism of solidified soil was studied by X-ray diffraction and scanning electron microscopy. The results show that the hydration reaction of the optimal solidified soil is more complete than that of the cement solidified soil, the connection between the particles is more dense, and the structure is more stable. Finally, the environmental and economic evaluation of the optimal formula was carried out, and it is concluded that the formula is superior to cement in strength, environment and economy.

Key words: industrial waste residue, early strength curing agent, D-optimal mixture design, optimal mixture ratio, unconfined compression strength, microscopic mechanism

中图分类号:

TU502

厉帅康, 俞峰, 陈鑫, 余静. 水泥-矿渣基早强固化剂制备及固化土宏微观性能研究[J]. 硅酸盐通报, 2023, 42(11): 3964-3977.

LI Shuaikang, YU Feng, CHEN Xin, YU Jing. Preparation of Cement-Slag Based Early Strength Curing Agent and Macro and Micro Properties of Solidified Soil[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 3964-3977.

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