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A platform for research: civil engineering, architecture and urbanism
Preparation method and application of modified regenerated micro powder
The invention discloses a preparation method and application of modified regenerated micro powder, and relates to the technical field of building materials. The preparation method comprises the following steps: crushing and grinding waste concrete to obtain regenerated micro powder; adding alkaline industrial wastewater into the regenerated micro powder, heating, pressurizing, stirring and filtering to obtain filtrate I and filter residues I; respectively adding acidic industrial wastewater into the filtrate I and the filter residue I, stirring and filtering to respectively obtain a filter residue II and a filter residue III; and mixing the filter residue II and the filter residue III, washing with water, filtering, drying and grinding to obtain the modified regenerated micro powder. According to the preparation method, the regenerated micro powder can be well activated, after the micro powder is used as an auxiliary cementing material to partially replace cement, the compressive strength of concrete can be improved, the compactness of the concrete can be improved, meanwhile, alkaline industrial wastewater and acid industrial wastewater are fully utilized, and the purposes of waste utilization, energy conservation and efficiency improvement are achieved.
本发明公开了一种改性再生微粉的制备方法及其应用，涉及建筑材料技术领域。上述制备方法包括以下步骤：将废弃混凝土破碎，粉磨，得到再生微粉；向再生微粉中加入碱性工业废水，加热，加压，搅拌，过滤，得到滤液I和滤渣I；向所述滤液I和滤渣I中分别加入酸性工业废水，搅拌，过滤，分别得到滤渣II和滤渣III；将所述滤渣II和滤渣III混合，水洗，过滤，干燥，粉磨后，得到改性再生微粉。本发明的制备方法可很好的活化再生微粉，作为辅助胶凝材料部分替代水泥后，能提高混凝土抗压强度，改善混凝土的密实性，同时充分利用了碱性工业废水和酸性工业废水，实现了废物利用和节能增效的目的。
Preparation method and application of modified regenerated micro powder
The invention discloses a preparation method and application of modified regenerated micro powder, and relates to the technical field of building materials. The preparation method comprises the following steps: crushing and grinding waste concrete to obtain regenerated micro powder; adding alkaline industrial wastewater into the regenerated micro powder, heating, pressurizing, stirring and filtering to obtain filtrate I and filter residues I; respectively adding acidic industrial wastewater into the filtrate I and the filter residue I, stirring and filtering to respectively obtain a filter residue II and a filter residue III; and mixing the filter residue II and the filter residue III, washing with water, filtering, drying and grinding to obtain the modified regenerated micro powder. According to the preparation method, the regenerated micro powder can be well activated, after the micro powder is used as an auxiliary cementing material to partially replace cement, the compressive strength of concrete can be improved, the compactness of the concrete can be improved, meanwhile, alkaline industrial wastewater and acid industrial wastewater are fully utilized, and the purposes of waste utilization, energy conservation and efficiency improvement are achieved.
本发明公开了一种改性再生微粉的制备方法及其应用，涉及建筑材料技术领域。上述制备方法包括以下步骤：将废弃混凝土破碎，粉磨，得到再生微粉；向再生微粉中加入碱性工业废水，加热，加压，搅拌，过滤，得到滤液I和滤渣I；向所述滤液I和滤渣I中分别加入酸性工业废水，搅拌，过滤，分别得到滤渣II和滤渣III；将所述滤渣II和滤渣III混合，水洗，过滤，干燥，粉磨后，得到改性再生微粉。本发明的制备方法可很好的活化再生微粉，作为辅助胶凝材料部分替代水泥后，能提高混凝土抗压强度，改善混凝土的密实性，同时充分利用了碱性工业废水和酸性工业废水，实现了废物利用和节能增效的目的。
Preparation method and application of modified regenerated micro powder
一种改性再生微粉的制备方法及其应用
DAI ZHUDUAN (author) / CHEN JIAN (author) / ZHOU XIAOYANG (author)
2024-05-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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