Mechanical properties and chemical microscopic characteristics of all-solid-waste composite cementitious materials prepared from phosphogypsum and granulated blast furnace slag
文献类型：期刊论文
| 作者 | Meng, Wencheng1; Dong, Yiqie1; Zang, Meng1; Zou, Nachuan1; Lu, Haijun1,2 |
| 刊名 | MATERIALS TODAY COMMUNICATIONS
 |
| 出版日期 | 2024-12-01 |
| 卷号 | 41页码:10 |
| 关键词 | Cementitious materials Phosphogypsum Thermal activation Softening coefficients hydration mechanism |
| DOI | 10.1016/j.mtcomm.2024.110809 |
| 英文摘要 | Industrial wastes, such as phosphogypsum, are characterized by high production and accumulation volumes, and significant pollution. A high-performance, all-solid waste, phosphogypsum-based composite cementitious material (PCCM) was developed by using a hybrid ball milling method and thermal activation to stimulate various industrial wastes. Optimization of rationing was analyzed using extreme variance, standard variance, and multiple regression models. The macro-engineering parameters of PCCM were evaluated through flexural and compressive tests. The mineralogical composition, functional groups, micro-morphology, and molecular structure of PCCM were examined through micro-testing. When the mass ratio of Ball milled calcined phosphogypsum (BCPG) to granulated blast furnace slag (GGBS) is 1.2:1, with a 4 % addition of calcium oxide and a water-cement ratio of 0.4, the 28-day flexural and compressive strengths, as well as the softening coefficients, of PCCM can reach 7.27 MPa, 40.1 MPa, and 0.922, respectively, closely matching the performance of C42.5 cement. Under the synergistic effects of the hydration reaction and an alkaline environment, the CaSO4 in the PCCM system hydrated and crystallized to produce gypsum-phase crystals, enhancing early strength properties by 60-174 %. As hydration continued, SO4 2- reacted with silicon and aluminum oxides, prompting secondary hydration of GGBS, and increasing AFt and C-(A)-S-H in the system. This research offers a new approach for the co-disposal and resource utilization of various solid wastes while identifying a cementitious material that can replace traditional cement in practical engineering applications. |
| 资助项目 | Natural Science Foun-dation of Hubei Province of China[2022CFA011] ; National Natural Science Foundation of China[U20A20320] ; Natural Science Foundation of Hubei Province of China[2023AFD214] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001346711800001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43069]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lu, Haijun |
| 作者单位 | 1.Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Wencheng,Dong, Yiqie,Zang, Meng,et al. Mechanical properties and chemical microscopic characteristics of all-solid-waste composite cementitious materials prepared from phosphogypsum and granulated blast furnace slag[J]. MATERIALS TODAY COMMUNICATIONS,2024,41:10. |
| APA | Meng, Wencheng,Dong, Yiqie,Zang, Meng,Zou, Nachuan,&Lu, Haijun.(2024).Mechanical properties and chemical microscopic characteristics of all-solid-waste composite cementitious materials prepared from phosphogypsum and granulated blast furnace slag.MATERIALS TODAY COMMUNICATIONS,41,10. |
| MLA | Meng, Wencheng,et al."Mechanical properties and chemical microscopic characteristics of all-solid-waste composite cementitious materials prepared from phosphogypsum and granulated blast furnace slag".MATERIALS TODAY COMMUNICATIONS 41(2024):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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