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ZV型修补胶是以高分子共聚物为基本原料,掺加适量改性剂、有机助剂制成的水乳状产品,无毒、不燃、无腐蚀性,PH值为6～6.5,粘度200～500厘泊。ZV型修补胶可直接掺入水泥砂浆和混凝土中,配制成聚合物砂浆和聚合物混凝土,大大增加粘结强度、抗拉抗折强度,提高抗渗性能和变形性能,也可以掺入水泥浆中配制成薄层涂料和界面处理浆。京广K770+853复线桥梁体加固工程,为3-16m普通钢筋混凝土π型梁。该桥已运营了31年,近年来,由于运量不断增大,该桥梁下翼缘裂损严重,腹板出现大量裂缝,严重危及行车安全。本工程原设计是以郑计修(91)126号文为依据的换梁大修,于93年编制了设计文件,后因北桥台电化线杆位置影响换梁作业,根据局工务处指示精神,本次在原批文精神的基础上采用梁体加固新技术、新工艺,以改善现有病害状态。其工艺简介如下:
ZV-based repair glue is based on macromolecule copolymer as raw material, mixed with proper amount of modifier and water-milky products made of organic additives, nontoxic, non-flammable and non-corrosive with PH value of 6 ~ 6.5 and viscosity of 200 ~ 500 cps. ZV-type repair adhesive can be directly incorporated into the cement mortar and concrete, formulated into polymer mortar and polymer concrete, greatly increase the bond strength, tensile flexural strength, improve impermeability and deformation properties, can also be mixed with cement In the preparation of thin coatings and interface treatment slurry. Beijing-Guangzhou K770 +853 double-track bridge body reinforcement project, 3-16m ordinary reinforced concrete π-beam. The bridge has been in operation for 31 years. In recent years, due to the increasing traffic volume, the cracking of the lower flange of the bridge is serious with a lot of cracks in the web, seriously endangering traffic safety. The original design of this project is to change Liang Daixiu based on document Zheng Ji Xiu (91) 126, and the design document was prepared in 1993. After the change of beam position due to the location of Beiqiao electro-galvanized pole, On the basis of the spirit of the original approval, the beam body reinforcement technology and new technology are used to improve the existing disease status. The process is as follows: