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A platform for research: civil engineering, architecture and urbanism
High-toughness cement-based interface agent for repairing and reinforcing and preparation method of high-toughness cement-based interface agent
The invention relates to a high-toughness cement-based interface agent for repairing and reinforcing and a preparation method thereof, which are used for solving the problems of low bonding strength and poor toughness of the existing interface agent. Comprising the following components in parts by weight: 400-1200 parts of a cementing material; 2 to 14 parts of high-modulus chopped polypropylene fiber; 80 to 360 parts of water; 200 to 600 parts of fine aggregate; 2-12 parts of a high-efficiency water reducing agent; and 1-4 parts of a thickening agent. The preparation method comprises the following steps: soaking in a salpeter solution with the concentration of 50-80% at 70 DEG C for 3 hours, drying at 60 DEG C for 12 hours, then soaking in a solution containing 0.01-0.04 mol/L of aluminum nitrate and 0.1-0.4 mol/L of urea, transferring into a stainless steel pressure container, performing high-pressure treatment at 120 DEG C for 24 hours, combining aluminum ions and hydroxyl ions in the high-pressure container to form a metastable phase AlOOH which is attached to the surface of the fiber, modifying the high-modulus chopped polypropylene fiber, and drying at 60 DEG C for 12 hours to obtain the modified high-modulus chopped polypropylene fiber. And the toughness of the repaired concrete member is greatly improved.
本发明涉及一种修补加固用高韧性水泥基界面剂及其制备方法，用于解决现有界面剂粘结强度低韧性差的问题。包括重量份数的各组分：胶凝材料400～1200份；高模量短切聚丙烯纤维2～14份；水80～360份；细集料200～600份；高效减水剂2～12份；增稠剂1～4份。在50％～80％浓度硝酸溶液，70℃浸泡3h，60℃烘干12h，然后浸泡于含0.01～0.04mol/L的硝酸铝与0.1～0.4mol/L尿素溶液中，并转移至不锈钢压力容器中，120℃高压24h，高压容器中铝离子和氢氧根离子结合形成介稳相AlOOH并附着于纤维表面，对高模量短切聚丙烯纤维改性，大幅提升修补后混凝土构件的韧性。
High-toughness cement-based interface agent for repairing and reinforcing and preparation method of high-toughness cement-based interface agent
The invention relates to a high-toughness cement-based interface agent for repairing and reinforcing and a preparation method thereof, which are used for solving the problems of low bonding strength and poor toughness of the existing interface agent. Comprising the following components in parts by weight: 400-1200 parts of a cementing material; 2 to 14 parts of high-modulus chopped polypropylene fiber; 80 to 360 parts of water; 200 to 600 parts of fine aggregate; 2-12 parts of a high-efficiency water reducing agent; and 1-4 parts of a thickening agent. The preparation method comprises the following steps: soaking in a salpeter solution with the concentration of 50-80% at 70 DEG C for 3 hours, drying at 60 DEG C for 12 hours, then soaking in a solution containing 0.01-0.04 mol/L of aluminum nitrate and 0.1-0.4 mol/L of urea, transferring into a stainless steel pressure container, performing high-pressure treatment at 120 DEG C for 24 hours, combining aluminum ions and hydroxyl ions in the high-pressure container to form a metastable phase AlOOH which is attached to the surface of the fiber, modifying the high-modulus chopped polypropylene fiber, and drying at 60 DEG C for 12 hours to obtain the modified high-modulus chopped polypropylene fiber. And the toughness of the repaired concrete member is greatly improved.
本发明涉及一种修补加固用高韧性水泥基界面剂及其制备方法，用于解决现有界面剂粘结强度低韧性差的问题。包括重量份数的各组分：胶凝材料400～1200份；高模量短切聚丙烯纤维2～14份；水80～360份；细集料200～600份；高效减水剂2～12份；增稠剂1～4份。在50％～80％浓度硝酸溶液，70℃浸泡3h，60℃烘干12h，然后浸泡于含0.01～0.04mol/L的硝酸铝与0.1～0.4mol/L尿素溶液中，并转移至不锈钢压力容器中，120℃高压24h，高压容器中铝离子和氢氧根离子结合形成介稳相AlOOH并附着于纤维表面，对高模量短切聚丙烯纤维改性，大幅提升修补后混凝土构件的韧性。
High-toughness cement-based interface agent for repairing and reinforcing and preparation method of high-toughness cement-based interface agent
一种修补加固用高韧性水泥基界面剂及其制备方法
WU KAI (author) / ZHANG YONG (author) / PAN FENG (author) / GAO KUO (author) / XU DAWEI (author)
2023-10-27
Patent
Electronic Resource
Chinese
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