Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Carbonization-free building solid waste modified recycled coarse aggregate as well as preparation method and application thereof
The invention discloses carbonization-free building solid waste modified recycled coarse aggregate as well as a preparation method and application thereof. The recycled coarse aggregate is composed of a building solid waste substrate and a modified dopamine coating wrapping the surface of the building solid waste substrate. The particle size of the building solid waste substrate is 5-20 mm; the thickness of the modified dopamine coating ranges from 8 micrometers to 24 micrometers. The recycled coarse aggregate is prepared by an impregnation method, and the thickness of the dopamine coating is controlled by controlling the impregnation time of a substrate under a weakly alkaline condition. The concrete prepared on the basis of the coarse aggregate provided by the invention has excellent early hardening property, compactness and corrosion resistance, and compared with the concrete prepared from the uncoated coarse aggregate, the compressive strength of the concrete in one day is improved by 9.7%, the compressive strength in 28 days is improved by 15.9%, and the chloride ion migration coefficient and the total capillary water absorption are respectively reduced by 23.9% and 33.7%.
本发明公开了一种免碳化建筑固废改性再生粗骨料及其制备方法及应用。该再生粗骨料由建筑固废基底及其表面包裹的改性多巴胺涂层组成；所述建筑固废基底的粒径为5～20mm；所述改性多巴胺涂层为厚度为8～24μm。该再生粗骨料通过浸渍法制备，在弱碱性条件下通过控制基底的浸渍时间来控制其多巴胺涂层的厚度。基于本发明所提供粗骨料制备的混凝土具有优异的早硬性、密实度以及抗腐蚀性，相较于无涂层粗骨料制备的混凝土，其1天抗压强度提升9.7％，28天抗压强度提升15.9％，氯离子迁移系数以及总毛细吸水量分别下降23.9％和33.7％。
Carbonization-free building solid waste modified recycled coarse aggregate as well as preparation method and application thereof
The invention discloses carbonization-free building solid waste modified recycled coarse aggregate as well as a preparation method and application thereof. The recycled coarse aggregate is composed of a building solid waste substrate and a modified dopamine coating wrapping the surface of the building solid waste substrate. The particle size of the building solid waste substrate is 5-20 mm; the thickness of the modified dopamine coating ranges from 8 micrometers to 24 micrometers. The recycled coarse aggregate is prepared by an impregnation method, and the thickness of the dopamine coating is controlled by controlling the impregnation time of a substrate under a weakly alkaline condition. The concrete prepared on the basis of the coarse aggregate provided by the invention has excellent early hardening property, compactness and corrosion resistance, and compared with the concrete prepared from the uncoated coarse aggregate, the compressive strength of the concrete in one day is improved by 9.7%, the compressive strength in 28 days is improved by 15.9%, and the chloride ion migration coefficient and the total capillary water absorption are respectively reduced by 23.9% and 33.7%.
本发明公开了一种免碳化建筑固废改性再生粗骨料及其制备方法及应用。该再生粗骨料由建筑固废基底及其表面包裹的改性多巴胺涂层组成；所述建筑固废基底的粒径为5～20mm；所述改性多巴胺涂层为厚度为8～24μm。该再生粗骨料通过浸渍法制备，在弱碱性条件下通过控制基底的浸渍时间来控制其多巴胺涂层的厚度。基于本发明所提供粗骨料制备的混凝土具有优异的早硬性、密实度以及抗腐蚀性，相较于无涂层粗骨料制备的混凝土，其1天抗压强度提升9.7％，28天抗压强度提升15.9％，氯离子迁移系数以及总毛细吸水量分别下降23.9％和33.7％。
Carbonization-free building solid waste modified recycled coarse aggregate as well as preparation method and application thereof
一种免碳化建筑固废改性再生粗骨料及其制备方法和应用
LIU BAOJU (Autor:in) / YE HUIWEN (Autor:in) / WU XIANG (Autor:in) / SHI JINYAN (Autor:in)
02.04.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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