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A platform for research: civil engineering, architecture and urbanism
Concrete superfine composite mineral admixture prepared from urban construction waste and preparation method of concrete superfine composite mineral admixture
The invention relates to the technical field of solid waste reutilization, in particular to a concrete superfine composite mineral admixture prepared from urban construction waste and a preparation method thereof.The concrete superfine composite mineral admixture is prepared by adding wollastonite particles into urban construction waste particles, combining control over the dosage ratio of the wollastonite particles to the urban construction waste particles and meanwhile preparing the concrete superfine composite mineral admixture from the urban construction waste. Cement brick particles and concrete block particles are selected for urban construction waste particles, and after the specific surface area is larger than 380 m < 2 >/kg through vertical milling, the composite mineral admixture is obtained, the stability is smaller than or equal to 2.0, the 7d strength activity index reaches 68% or above, the calcium carbonate content reaches 74% or above, the radioactivity IRa is smaller than 0.3, and I gamma is about 0.4. The application safety of the admixture and the stability of the admixture after blending are greatly improved, the defects of high transportation cost, high raw material cost and the like caused by regional characteristics of lime, fly ash, blast furnace slag and the like are avoided, and the preparation cost of the concrete superfine composite mineral admixture is greatly reduced.
本发明涉及固废再利用技术领域，尤其是利用城建垃圾制备的混凝土超细复合矿物掺合料及其制备方法，经在城建垃圾颗粒中添加毛石块颗粒，结合对毛石块颗粒与城建垃圾颗粒用量比控制，同时，对城建垃圾颗粒选定采用水泥砖块颗粒、混凝土块颗粒，使得经立磨至比表面积＞380㎡/kg后，得到复合矿物掺合料，其安定性≤2.0，且7d强度活性指数达到68％以上，碳酸钙含量达到74％以上，放射性IRa＜0.3、Iγ约为0.4，极大程度提高掺合料应用安全性和掺合后的稳定性，避免了石灰、粉煤灰、高炉渣等地域特性而导致运输成本较高，原料成本较高等缺陷，极大程度降低了混凝土超细复合矿物掺合料制备成本。
Concrete superfine composite mineral admixture prepared from urban construction waste and preparation method of concrete superfine composite mineral admixture
The invention relates to the technical field of solid waste reutilization, in particular to a concrete superfine composite mineral admixture prepared from urban construction waste and a preparation method thereof.The concrete superfine composite mineral admixture is prepared by adding wollastonite particles into urban construction waste particles, combining control over the dosage ratio of the wollastonite particles to the urban construction waste particles and meanwhile preparing the concrete superfine composite mineral admixture from the urban construction waste. Cement brick particles and concrete block particles are selected for urban construction waste particles, and after the specific surface area is larger than 380 m < 2 >/kg through vertical milling, the composite mineral admixture is obtained, the stability is smaller than or equal to 2.0, the 7d strength activity index reaches 68% or above, the calcium carbonate content reaches 74% or above, the radioactivity IRa is smaller than 0.3, and I gamma is about 0.4. The application safety of the admixture and the stability of the admixture after blending are greatly improved, the defects of high transportation cost, high raw material cost and the like caused by regional characteristics of lime, fly ash, blast furnace slag and the like are avoided, and the preparation cost of the concrete superfine composite mineral admixture is greatly reduced.
本发明涉及固废再利用技术领域，尤其是利用城建垃圾制备的混凝土超细复合矿物掺合料及其制备方法，经在城建垃圾颗粒中添加毛石块颗粒，结合对毛石块颗粒与城建垃圾颗粒用量比控制，同时，对城建垃圾颗粒选定采用水泥砖块颗粒、混凝土块颗粒，使得经立磨至比表面积＞380㎡/kg后，得到复合矿物掺合料，其安定性≤2.0，且7d强度活性指数达到68％以上，碳酸钙含量达到74％以上，放射性IRa＜0.3、Iγ约为0.4，极大程度提高掺合料应用安全性和掺合后的稳定性，避免了石灰、粉煤灰、高炉渣等地域特性而导致运输成本较高，原料成本较高等缺陷，极大程度降低了混凝土超细复合矿物掺合料制备成本。
Concrete superfine composite mineral admixture prepared from urban construction waste and preparation method of concrete superfine composite mineral admixture
利用城建垃圾制备的混凝土超细复合矿物掺合料及其制备方法
WANG YAO (author) / ZHANG XUHUI (author) / SONG MEI (author) / ZHANG JIAJU (author) / ZHANG MIN (author) / YIN JING (author) / WANG JIANYI (author) / WANG YONG (author)
2022-06-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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