多固废激发剂优化模型及微观机理分析
OPTIMIZATION MODEL AND MICROSCOPIC MECHANISM ANALYSIS OF A MULTI-SOLID WASTE ACTIVATOR
张建俊 1王宝强 1蔡冀奇 2姜英杰 3冉佳莹1
作者信息
- 1. 辽宁工程技术大学土木工程学院,辽宁阜新 123000
- 2. 北京首钢矿山建设工程有限责任公司,北京 100043
- 3. 辽宁省科学技术馆,沈阳 110167
- 折叠
摘要
采用矿渣粉、粉煤灰、钢渣、石灰、脱硫灰等固废配制尾矿砂充填体激发材料(MSWA).构建多响应优化模型,分析MSWA原料显著性,开展微观试验探究水化机理.结果表明:多响应优化模型计算误差＜2％,可有效反映配比意愿及原料显著性;试验组TS-3意愿值0.812为最优,3 d强度和扩展度分别为0.643 MPa和15.8 cm;3 d强度项中显著因子为水泥熟料(0.629)和钢渣(0.171),扩展度项显著因子为粉煤灰(0.761).微观试验表明:在矿渣粉和石灰等提供的OH-和SO42-溶液下,水泥熟料等原料中C3S和C3A迅速水化放热,粉煤灰可促进水化、改善砂浆和易性,且水化产物中C—S—H及AFt等发育良好,会使结构更致密,从而增强充填体的宏观力学性能.
Abstract
Solid wastes such as slag,fly ash,steel slag,lime,and desulfurization ash were used to prepare a multi-solid waste activator(MSWA)for tailings filling.We constructed a multi-response optimization model,analyzed the significance of MSWA raw materials,and conducted microscopic experiments to explore the hydration mechanism.The above test results showed that:the error of the calculated value of the desired model of multiple responses was less than 2％,which can effectively reflect the proportioning willingness and the significance of raw materials;the TS-3 intention value of the test group was 0.812,and the 3-day strength and expansion were 0.643 MPa and 15.8 cm;the significant factors in 3-day strength term were cement clinker(0.629)and steel slag(0.171),the significant factor of expansion term was fly ash(0.761).The microscopic test showed that:in the OH-and SO2-solution provided by slag,C3S and C3A in cement clinker and other raw materials rapidly hydrated and released heat,and fly ash could promote hydration and improve the workability of mortar.In the product,C—S—H and AFt were well developed,making the structure compact,thus enhancing the macroscopic mechanical properties of the filling body.
关键词
固废材料/激发剂/尾砂/充填材料/响应曲面/水化热/孔结构Key words
solid waste materials/activator/tailings/filling slurry/response surface/hydration heat/pore structure引用本文复制引用
基金项目
国家重点研发计划(2017YFC1503101)
辽宁工程技术大学学科创新团队项目(LNTU20TD08)
辽宁省教育厅科学技术研究重点项目(JYTZD2023077)
出版年
2024
NETL
NSTL
万方数据