Hydraulic concrete surface layer slit sealing method

Abstract

The invention relates to a hydraulic concrete surface layer slit sealing method belonging to a hydraulic concrete slit sealing method and comprising the following formula method: the formula contains 1000-1400 parts of general purpose portland cement PO42.5, 1100-2000 parts of medium coarse sand, 0-600 parts of chicken girt, 300-360 parts of water and a composite material; the method comprises the following steps of: (1) cutting a concrete surface layer crack; (2) cleaning the base surface of the concrete crack; and (3) preparing the composite material in the proportion of the formula, stirring the composite material with cement, the medium coarse sand and the water for 3 min at the stirring speed of 2000-2500R / min to form a cement gel material, and then pouring the cement gel material into slits. The invention is suitable for hydraulic concrete dam face slit treatment with better effect.

Description

technical field

[0001] The invention belongs to a sealing treatment method for hydraulic concrete slits. Background technique

[0002] At present, there are large cracks in the face protection concrete of many reservoir dams in Jilin Province. The reason for the cracks is that our province is located in the seasonally frozen soil area, and the temperature difference is large. After the dam concrete is poured, cracks are often caused by the large temperature difference, and the cracks have a great impact on the safety of the reservoir project.

[0003] Since cracks in hydraulic concrete engineering have a great impact on leakage and engineering durability, the effect of sealing the joints directly affects the performance of the engineering. Conventional treatment methods cannot effectively solve this problem, and special treatment technologies are necessary. The project requires that the material for cutting joints should have a good bonding effect with the old concrete, suf...

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