Preparation and Performance of Vanadium Tailings-Reservoir Sediment-Phosphogypsum-Based Foamed Concrete

Cui Xiaowei; Di Yanqing; Wang ChanglongWang YongboZhang SuhuaZhai YuxinZheng YongchaoWang ShaoxiLi XinChen JingliangRen Zhenzhen

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Preparation and Performance of Vanadium Tailings-Reservoir Sediment-Phosphogypsum-Based Foamed Concrete

机译：Preparation and Performance of Vanadium Tailings-Reservoir Sediment-Phosphogypsum-Based Foamed Concrete

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Foamed concrete (FC) was prepared from raw materials of vanadium tailings (VTs), reservoir sediment (RS), and phosphogypsum (PG). The physicochemical properties of the raw materials were studied by using X-ray diffraction (XRD), X-ray fluorescence (XRF) analysis, and inductively coupled plasma emission spectrometer (ICP-OES). The preparation and properties of FC were investigated by particle size analysis and strength test. The hydration products and microstructure of FC were analyzed by XRD and field emission scanning electron microscopy (FE-SEM). The results show that when the specific surface area (SSA) of VTs is 768 m(2)center dot kg(-1) and the content is 40%, the products with a compressive strength of 3.56 MPa and density of 619.1 kg center dot m(-3) meet the requirements of JG/T 266-2011 standard on FC of grades A06 and C3.0; the main mineral phases in the products are calcium silicate hydrate (C-S-H) gel, ettringite (AFt), and calcite, as well as the residual mineral phases after the system reaction include quartz, orthoclase, mullite, pyrite, and PG.

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《Mathematical Problems in Engineering: Theory, Methods and Applications》 |2021年第45期|8468063.1-8468063.11|共11页
作者
Cui Xiaowei; Di Yanqing; Wang ChanglongWang YongboZhang SuhuaZhai YuxinZheng YongchaoWang ShaoxiLi XinChen JingliangRen Zhenzhen;
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Handan Jianye Construct Engn Qual Inspect Co Ltd, Handan 056000, Peoples R China;

China Railway Construct Grp Co Ltd, Beijing 100040, Peoples R China;

Beijing Bldg Mat Acad Sci Res, State Key Lab Solid Waste Reuse Bldg Mat, Beijing 100041, Peoples R ChinaHebei Univ Engn, Sch Civil Engn, Handan 056038, Peoples R ChinaShangluo Univ, Shaanxi Key Lab Comprehens Utilizat Tailings Reso, Shangluo 726000, Peoples R ChinaShangluo Univ, Shaanxi Key Lab Comprehens Utilizat Tailings Reso, Shangluo 726000, Peoples R China|Hebei Univ Engn, Sch Civil Engn, Handan 056038, Peoples R China;

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Preparation and Performance of Vanadium Tailings-Reservoir Sediment-Phosphogypsum-Based Foamed Concrete

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