Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Self-repairing recycled concrete and preparation method thereof
The invention discloses self-repairing recycled concrete and a preparation method thereof, relates to concrete and a preparation method thereof, and aims to solve the technical problems that the mechanical property, the working property and the durability of the prepared recycled aggregate concrete are weaker than those of common concrete due to poor physical property, high porosity and high water absorption rate of the existing recycled aggregate. The self-repairing recycled concrete is prepared by mixing nano silica sol, cement, fly ash, water, fine aggregate, natural coarse aggregate, a water reducing agent and modified aggregate. The preparation method comprises the following steps: soaking the nano silica sol, recycling the aggregate, premixing the cement, the fly ash, the fine aggregate, the coarse aggregate and the modified aggregate, stirring the water, the water reducing agent and the nano silica sol, and finally adding the stirring water into the premixed material for mixing and stirring to obtain the modified concrete. After the modified concrete is cured for 28 days, the compressive strength and the splitting tensile strength reach 34.3-39.6 MPa and 2.63-2.91 MPa, the slump is 135-155 mm, and the modified concrete can be applied to the field of buildings.
一种自修复性再生混凝土及其制备方法，它涉及混凝土及其制备方法，它是要解决现有的再生骨料物理性能差、孔隙率和吸水率较高，导致其制备的再生骨料混凝土力学性能、工作性能、耐久性能弱于普通混凝土的技术问题。本发明的自修复性再生混凝土由纳米硅溶胶、水泥、粉煤灰、水、细骨料、天然粗骨料、减水剂和改性骨料混合而成。制法：先将纳米硅溶胶浸泡，再生骨料，再将水泥、粉煤灰、细骨料、粗骨料、改性骨料预拌，再将水、减水剂和纳米硅溶胶拌搅拌，最后将拌和水加入到预拌物中混合搅拌，得到改性混凝土。该改性混凝土养护28d后抗压强度和劈裂抗拉强度达到34.3～39.6MPa、2.63～2.91MPa，坍落度在135～155mm，可应用于建筑领域。
Self-repairing recycled concrete and preparation method thereof
The invention discloses self-repairing recycled concrete and a preparation method thereof, relates to concrete and a preparation method thereof, and aims to solve the technical problems that the mechanical property, the working property and the durability of the prepared recycled aggregate concrete are weaker than those of common concrete due to poor physical property, high porosity and high water absorption rate of the existing recycled aggregate. The self-repairing recycled concrete is prepared by mixing nano silica sol, cement, fly ash, water, fine aggregate, natural coarse aggregate, a water reducing agent and modified aggregate. The preparation method comprises the following steps: soaking the nano silica sol, recycling the aggregate, premixing the cement, the fly ash, the fine aggregate, the coarse aggregate and the modified aggregate, stirring the water, the water reducing agent and the nano silica sol, and finally adding the stirring water into the premixed material for mixing and stirring to obtain the modified concrete. After the modified concrete is cured for 28 days, the compressive strength and the splitting tensile strength reach 34.3-39.6 MPa and 2.63-2.91 MPa, the slump is 135-155 mm, and the modified concrete can be applied to the field of buildings.
一种自修复性再生混凝土及其制备方法，它涉及混凝土及其制备方法，它是要解决现有的再生骨料物理性能差、孔隙率和吸水率较高，导致其制备的再生骨料混凝土力学性能、工作性能、耐久性能弱于普通混凝土的技术问题。本发明的自修复性再生混凝土由纳米硅溶胶、水泥、粉煤灰、水、细骨料、天然粗骨料、减水剂和改性骨料混合而成。制法：先将纳米硅溶胶浸泡，再生骨料，再将水泥、粉煤灰、细骨料、粗骨料、改性骨料预拌，再将水、减水剂和纳米硅溶胶拌搅拌，最后将拌和水加入到预拌物中混合搅拌，得到改性混凝土。该改性混凝土养护28d后抗压强度和劈裂抗拉强度达到34.3～39.6MPa、2.63～2.91MPa，坍落度在135～155mm，可应用于建筑领域。
Self-repairing recycled concrete and preparation method thereof
一种自修复性再生混凝土及其制备方法
KONG JIE (Autor:in) / WANG WEICHENG (Autor:in) / HU YONGCHAO (Autor:in) / ZHANG DAOMING (Autor:in) / SHAO PENGFEI (Autor:in)
01.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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