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通过采用补偿收缩混凝土无缝设计和施工新方法,可以实现超长混凝土结构取消后浇带或不设缝的目的,不但可有效缩短工期,且防水性能好,是解决超长混凝土结构裂渗问题的有效技术途径。通过混凝土坍落度试验、限制膨胀率试验以及抗压强度试验,研究了膨胀剂掺量对三种强度等级补偿收缩混凝土的坍落度以及各龄期限制膨胀率和抗压强度的影响。根据试验结果,得出各强度等级补偿收缩混凝土膨胀剂的最优掺量,优化了混凝土配合比以实现实际超长混凝土结构工程对补偿收缩混凝土各方面性能的要求。
By adopting a new method of seamlessly designing and constructing compensated shrinkage concrete, the purpose of pouring the strip or not after the canceling of the ultra-long concrete structure can be achieved, which not only shortens the construction period but also has good waterproof performance, which is the solution to the problem of the seepage of the ultra-long concrete structure Effective technical approach. Through the slump test, the restraint expansion rate test and the compressive strength test, the effect of expander dosage on the slump and the restrained expansion rate and compressive strength of three kinds of concrete grade shrinkage-compensated concrete was studied. According to the test results, the optimal dosage of shrinkage concrete expansive agent for each strength class is obtained, and the mix proportion of concrete is optimized to meet the requirements of various aspects of performance of compensated shrinkage concrete in actual super-long concrete structure engineering.