OPTIMIZATION MODEL AND MICROSCOPIC MECHANISM ANALYSIS OF A MULTI-SOLID WASTE ACTIVATOR

ZHANG Jianjun; WANG Baoqiang; CAI Jiqi; JIANG Yingjie; RAN Jiaying

doi:10.13205/j.hjgc.202404023

Volume 42 Issue 4

Apr. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(4): 196-203

ZHANG Jianjun, WANG Baoqiang, CAI Jiqi, JIANG Yingjie, RAN Jiaying. OPTIMIZATION MODEL AND MICROSCOPIC MECHANISM ANALYSIS OF A MULTI-SOLID WASTE ACTIVATOR[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 196-203. doi: 10.13205/j.hjgc.202404023

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ZHANG Jianjun, WANG Baoqiang, CAI Jiqi, JIANG Yingjie, RAN Jiaying. OPTIMIZATION MODEL AND MICROSCOPIC MECHANISM ANALYSIS OF A MULTI-SOLID WASTE ACTIVATOR[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(4): 196-203. doi: 10.13205/j.hjgc.202404023

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OPTIMIZATION MODEL AND MICROSCOPIC MECHANISM ANALYSIS OF A MULTI-SOLID WASTE ACTIVATOR

doi: 10.13205/j.hjgc.202404023

1. College of Civil Engineering, Liaoning Technical University,Fuxin 123000, China;
2. Beijing Shougang Mine Construction Engineering Co., Ltd.,Beijing 100043, China;
3. Liaoning Science and Technology Museum,Shenyang 110167, China

Received Date: 2023-08-30
Available Online: 2024-06-01

Abstract

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 SO^2-₄ 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.
- solid waste materials,
- activator,
- tailings,
- filling slurry,
- response surface,
- hydration heat,
- pore structure

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References

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沈阳化工大学材料科学与工程学院沈阳 110142

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