Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-shrinkage alkali-activated cement based on industrial solid waste recycling and preparation method thereof
The invention discloses low-shrinkage alkali-activated cement based on industrial solid waste recycling. The low-shrinkage alkali-activated cement is prepared from the following components in parts by weight: 70-100 parts of mineral powder, 0-30 parts of Portland cement, 5-30 parts of desulfurized gypsum, 38-55 parts of water, 3-5 parts of an alkali activator Na2O equivalent and 0.5-1 part of a water reducing agent, the novel low-shrinkage alkali-activated cement is prepared by compounding industrial solid waste mineral powder with a certain amount of Portland cement and externally doping thermal power plant solid waste-desulfurized gypsum. The alkali-activated cement prepared by the invention is natural green, the compressive strength of the alkali-activated cement can reach more than 32 MPa in 3 days, the compressive strength of the alkali-activated cement can reach more than 42.5 MPa in 28 days, the initial setting time is 35-480 minutes, the final setting time is 130-720 minutes, the self-shrinkage value of the alkali-activated cement in 28 days is 60-108 mu epsilon, and the drying shrinkage value of the alkali-activated cement in 28 days is 120-350 mu epsilon. The waste desulfurized gypsum of a thermal power plant is adopted to solve the problem of overlarge shrinkage of an alkali-activated cement material, the application field of the desulfurized gypsum is widened, the carbon emission of the alkali-activated cementing material is further reduced, and the production process is energy-saving and environment-friendly.
本发明公开了一种基于工业固废再利用的低收缩碱激发水泥，由如下各个成分按重量份组成：矿粉70～100、硅酸盐水泥0～30、脱硫石膏5～30、水38～55、碱激发剂为Na2O当量3～5、减水剂0.5～1；本发明将工业固废矿粉与一定量硅酸盐水泥复合，外掺火力发电厂固废‑脱硫石膏制备一种新型的低收缩碱激发水泥。本发明制得的碱激发水泥为自然绿色，3天抗压强度可达到32MPa以上，28天抗压强度可达到42.5MPa以上，初凝时间在35～480min，终凝时间130～720min，28天自收缩值60～108με，28天干燥收缩值120～350με。本发明采用火力发电厂的废弃物脱硫石膏解决碱激发水泥材料收缩过大的问题，不仅拓宽脱硫石膏的应用领域，而且进一步降低碱激发胶凝材料的碳排放，生产过程节能环保。
Low-shrinkage alkali-activated cement based on industrial solid waste recycling and preparation method thereof
The invention discloses low-shrinkage alkali-activated cement based on industrial solid waste recycling. The low-shrinkage alkali-activated cement is prepared from the following components in parts by weight: 70-100 parts of mineral powder, 0-30 parts of Portland cement, 5-30 parts of desulfurized gypsum, 38-55 parts of water, 3-5 parts of an alkali activator Na2O equivalent and 0.5-1 part of a water reducing agent, the novel low-shrinkage alkali-activated cement is prepared by compounding industrial solid waste mineral powder with a certain amount of Portland cement and externally doping thermal power plant solid waste-desulfurized gypsum. The alkali-activated cement prepared by the invention is natural green, the compressive strength of the alkali-activated cement can reach more than 32 MPa in 3 days, the compressive strength of the alkali-activated cement can reach more than 42.5 MPa in 28 days, the initial setting time is 35-480 minutes, the final setting time is 130-720 minutes, the self-shrinkage value of the alkali-activated cement in 28 days is 60-108 mu epsilon, and the drying shrinkage value of the alkali-activated cement in 28 days is 120-350 mu epsilon. The waste desulfurized gypsum of a thermal power plant is adopted to solve the problem of overlarge shrinkage of an alkali-activated cement material, the application field of the desulfurized gypsum is widened, the carbon emission of the alkali-activated cementing material is further reduced, and the production process is energy-saving and environment-friendly.
本发明公开了一种基于工业固废再利用的低收缩碱激发水泥，由如下各个成分按重量份组成：矿粉70～100、硅酸盐水泥0～30、脱硫石膏5～30、水38～55、碱激发剂为Na2O当量3～5、减水剂0.5～1；本发明将工业固废矿粉与一定量硅酸盐水泥复合，外掺火力发电厂固废‑脱硫石膏制备一种新型的低收缩碱激发水泥。本发明制得的碱激发水泥为自然绿色，3天抗压强度可达到32MPa以上，28天抗压强度可达到42.5MPa以上，初凝时间在35～480min，终凝时间130～720min，28天自收缩值60～108με，28天干燥收缩值120～350με。本发明采用火力发电厂的废弃物脱硫石膏解决碱激发水泥材料收缩过大的问题，不仅拓宽脱硫石膏的应用领域，而且进一步降低碱激发胶凝材料的碳排放，生产过程节能环保。
Low-shrinkage alkali-activated cement based on industrial solid waste recycling and preparation method thereof
一种基于工业固废再利用的低收缩碱激发水泥及其制备方法
XUE LILI (Autor:in) / ZHANG ZUHUA (Autor:in) / LIU HONGFEI (Autor:in) / NI ZHENKUN (Autor:in)
09.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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