A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cement-based curing material, application thereof and building decoration waste slag powder curing method
The invention belongs to the technical field of solid waste heavy metal curing and resource utilization, and particularly relates to a cement-based curing material, application thereof and a building decoration waste slag powder curing method. Cement, bentonite, gypsum and a heavy metal stabilizer are mixed in proportion to serve as the cement-based curing material, and the bentonite can be swelled and dispersed in water to form colloid-grade clay particles to adsorb heavy metal ions; the heavy metal stabilizer can change the existence state of heavy metals and reduce the bioavailability and mobility of the heavy metals; a hydration product formed after the cement meets water has wrapping and cementing effects on building decoration waste slag powder particles and can fill gaps among the building decoration waste slag powder particles, so that the compactness of a solidified body obtained after the heavy metal is solidified is improved; the gypsum reacts with the hydration product of the cement to generate ettringite, and the ettringite is filled in the solidified body to enhance the strength of the solidified body, so that the heavy metal is sealed in the solidified body, and the dissolution of the heavy metal in the solidified body is reduced.
本发明属于固体废弃物重金属固化与资源化利用技术领域，具体涉一种水泥基固化材料及其应用、建筑装修垃圾渣粉固化方法。本发明通过采用水泥、膨润土、生石膏和重金属稳定剂按比例混合作为水泥基固化材料，膨润土可在水中溶胀分散成胶体级粘粒吸附重金属离子；重金属稳定剂能改变重金属的存在状态，降低其生物有效性和迁移性；水泥遇水后形成的水化产物对建筑装修垃圾渣粉颗粒具有包裹胶结作用，而且能够填充建筑装修垃圾渣粉的颗粒间的空隙，提高固化重金属后所得固化体的密实度，生石膏与水泥的水化产物反应生成钙矾石填充在固化体中可以增强固化体的强度，使重金属封存在固化体内部，减少固化体中重金属的溶出。
Cement-based curing material, application thereof and building decoration waste slag powder curing method
The invention belongs to the technical field of solid waste heavy metal curing and resource utilization, and particularly relates to a cement-based curing material, application thereof and a building decoration waste slag powder curing method. Cement, bentonite, gypsum and a heavy metal stabilizer are mixed in proportion to serve as the cement-based curing material, and the bentonite can be swelled and dispersed in water to form colloid-grade clay particles to adsorb heavy metal ions; the heavy metal stabilizer can change the existence state of heavy metals and reduce the bioavailability and mobility of the heavy metals; a hydration product formed after the cement meets water has wrapping and cementing effects on building decoration waste slag powder particles and can fill gaps among the building decoration waste slag powder particles, so that the compactness of a solidified body obtained after the heavy metal is solidified is improved; the gypsum reacts with the hydration product of the cement to generate ettringite, and the ettringite is filled in the solidified body to enhance the strength of the solidified body, so that the heavy metal is sealed in the solidified body, and the dissolution of the heavy metal in the solidified body is reduced.
本发明属于固体废弃物重金属固化与资源化利用技术领域，具体涉一种水泥基固化材料及其应用、建筑装修垃圾渣粉固化方法。本发明通过采用水泥、膨润土、生石膏和重金属稳定剂按比例混合作为水泥基固化材料，膨润土可在水中溶胀分散成胶体级粘粒吸附重金属离子；重金属稳定剂能改变重金属的存在状态，降低其生物有效性和迁移性；水泥遇水后形成的水化产物对建筑装修垃圾渣粉颗粒具有包裹胶结作用，而且能够填充建筑装修垃圾渣粉的颗粒间的空隙，提高固化重金属后所得固化体的密实度，生石膏与水泥的水化产物反应生成钙矾石填充在固化体中可以增强固化体的强度，使重金属封存在固化体内部，减少固化体中重金属的溶出。
Cement-based curing material, application thereof and building decoration waste slag powder curing method
一种水泥基固化材料及其应用、建筑装修垃圾渣粉固化方法
YU YI (author) / WANG XING (author) / DUAN ZHENHUA (author) / HUANG DONGLI (author) / SHI QINGYAN (author) / XU BIJUN (author) / SHI QINGWEN (author) / JIA CHUAN (author) / LIN YOUSHENG (author) / TAO MENGJIA (author)
2021-09-14
Patent
Electronic Resource
Chinese
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