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A platform for research: civil engineering, architecture and urbanism
Alkali-activated slag-phosphogypsum all-solid waste cementing material and preparation method thereof
The invention provides an alkali-activated slag-ardealite all-solid waste cementing material and a preparation method thereof, and relates to the technical field of cementing materials, the preparation method comprises the following steps: treating ardealite with an acid solution, filtering, performing hydrophobic treatment on a filter cake, drying, grinding, calcining, and performing low-temperature aging to obtain pretreated ardealite; the method comprises the following steps: grinding coal-fired furnace slag, soaking in acid liquor, filtering, and drying a filter cake to constant weight to obtain pretreated coal-fired furnace slag; the pretreated phosphogypsum and the pretreated coal-fired slag are mixed in proportion, then a water reducing agent, a retarder, calcium oxide and sodium hydroxide are added and fully mixed, and the alkali-activated slag-phosphogypsum all-solid waste cementing material is obtained. The ardealite-slag cementing material is prepared from ardealite and coal-fired slag, harmful substances such as water-soluble phosphorus and fluorine in ardealite can be adsorbed, influences of the harmful substances on hydration of ardealite are avoided, pollution to underground water is reduced, and the problem that solid waste such as ardealite is difficult to utilize can be solved.
本发明提供一种碱激发炉渣‑磷石膏全固废胶凝材料及其制备方法，涉及胶凝材料技术领域，所述制备方法包括如下步骤：使用酸液处理磷石膏，过滤并对滤饼进行疏水处理，干燥后磨细并煅烧，随后进行低温陈化，得到预处理磷石膏；将燃煤炉渣磨细，使用酸液浸泡后过滤，滤饼干燥至恒重，得到预处理燃煤炉渣；将预处理磷石膏、预处理燃煤炉渣按比例混合，然后加入减水剂、缓凝剂、氧化钙、氢氧化钠并充分混合，得到碱激发炉渣‑磷石膏全固废胶凝材料。本发明使用磷石膏与燃煤炉渣制备磷石膏‑炉渣胶凝材料，能够吸附磷石膏中的水溶性磷、氟等有害物质，避免其对磷石膏的水化产生影响，并减少对地下水的污染，可解决磷石膏等固体废弃物难以利用的问题。
Alkali-activated slag-phosphogypsum all-solid waste cementing material and preparation method thereof
The invention provides an alkali-activated slag-ardealite all-solid waste cementing material and a preparation method thereof, and relates to the technical field of cementing materials, the preparation method comprises the following steps: treating ardealite with an acid solution, filtering, performing hydrophobic treatment on a filter cake, drying, grinding, calcining, and performing low-temperature aging to obtain pretreated ardealite; the method comprises the following steps: grinding coal-fired furnace slag, soaking in acid liquor, filtering, and drying a filter cake to constant weight to obtain pretreated coal-fired furnace slag; the pretreated phosphogypsum and the pretreated coal-fired slag are mixed in proportion, then a water reducing agent, a retarder, calcium oxide and sodium hydroxide are added and fully mixed, and the alkali-activated slag-phosphogypsum all-solid waste cementing material is obtained. The ardealite-slag cementing material is prepared from ardealite and coal-fired slag, harmful substances such as water-soluble phosphorus and fluorine in ardealite can be adsorbed, influences of the harmful substances on hydration of ardealite are avoided, pollution to underground water is reduced, and the problem that solid waste such as ardealite is difficult to utilize can be solved.
本发明提供一种碱激发炉渣‑磷石膏全固废胶凝材料及其制备方法，涉及胶凝材料技术领域，所述制备方法包括如下步骤：使用酸液处理磷石膏，过滤并对滤饼进行疏水处理，干燥后磨细并煅烧，随后进行低温陈化，得到预处理磷石膏；将燃煤炉渣磨细，使用酸液浸泡后过滤，滤饼干燥至恒重，得到预处理燃煤炉渣；将预处理磷石膏、预处理燃煤炉渣按比例混合，然后加入减水剂、缓凝剂、氧化钙、氢氧化钠并充分混合，得到碱激发炉渣‑磷石膏全固废胶凝材料。本发明使用磷石膏与燃煤炉渣制备磷石膏‑炉渣胶凝材料，能够吸附磷石膏中的水溶性磷、氟等有害物质，避免其对磷石膏的水化产生影响，并减少对地下水的污染，可解决磷石膏等固体废弃物难以利用的问题。
Alkali-activated slag-phosphogypsum all-solid waste cementing material and preparation method thereof
一种碱激发炉渣-磷石膏全固废胶凝材料及其制备方法
CAO XUEJUAN (author) / MIAO CHENGCHENG (author) / YUAN YING (author) / YANG XIAOYU (author) / KONG LINGYUN (author) / XING ZHENHUA (author) / WANG JINTONG (author) / RAO SHANGYI (author) / YANG FAN (author) / TANG BOMING (author)
2024-05-31
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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