A kind of anti-cracking mortar for repairing pipeline wall groove

Abstract

The invention belongs to the technical field of building mortar. The invention discloses an anti-crack mortar for repairing pipeline wall grooves, which is prepared from the following raw materials: 0.9-1.5 parts by weight of Portland cement, 0.2-0.6 parts by weight of gypsum powder, 4.2-6.4 parts by weight of medium sand, water 0.8-1.2 parts by weight, 0.16-0.24 parts by weight of fiber, and the following additives by weight percentage are added, water-retaining agent 0.14-0.20wt%, rubber powder 0.14-0.20wt%. The invention solves the problem in the prior art that after repairing the pipeline wall groove, the subsequent fine decoration surface layer is hollowed and cracked to form a dilapidated phase. The anti-cracking mortar used for repairing the pipeline wall groove in the present invention has certain repair adhesion Strength, hydration, and condensation process shrinkage ratio is shorter than the hydration time, so that the wall and wall groove can be repaired without cracking.

Description

technical field [0001] The invention relates to the technical field of building mortar, in particular to an anti-cracking mortar for repairing wall grooves of decoration pipelines. Background technique [0002] Concealed projects in the early stage of building decoration construction generally involve the pre-embedded slotting process of pipelines. After the slotting and piping are completed, the wall slots need to be repaired. In the existing construction, the repair of the wall slots generally uses cement mortar components similar to wall painting. The material is used for caulking, repairing and smoothing. Because ordinary cement mortar will produce uneven shrinkage in the process of hydration and initial setting, it will cause different hollowing, cracking or even falling off of the repaired parts, causing hollowing to the subsequent fine decoration surface. Cracked and dilapidated. [0003] Since the size of the pipeline wall groove is about a few centimeters to more t...

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Problems solved by technology

[0002] Concealed projects in the early stage of building decoration construction generally involve the pre-embedded slotting process of pipelines. After the slotting and piping are completed, the wall slots need to be repaired. In the existing construction, the repair of the wall slots generally uses cement mortar components similar to wall painting. The material is used for caulking, repairing and smoothing. Because ordinary cement mortar will produce uneven shrinkage in the process of hydration and initial setting, it will cause different hollowing, cracking or even falling off of the repaired parts, causing hollowing to the subsequent fine decoration surface. Cracked and dilapidated phase

[0003] Since the size of the pipeline wall groove is about a few centimeters to more than ten centimeters, it is neither a large wall cavity nor a gap at the corner joint. It takes a long time to cure and there will be cavities in the later stage, and it cannot be treated with caulking mortar, and more cracks will be generated due to uneven shrinkage in the later stage

[0004] In the prior art, although there are some anti-cracking mortars, such as Chinese Patent Publication No. CN103435321A, a kind of anti-cracking mortar is disclosed, such as Chinese Patent Publication No. CN104418563A, which discloses a light anti-cracking mortar, but the above two mortars All cannot be used for repairing the wall groove of the decoration pipeline in the present invention, the hydration time is long, and some cracks will still occur, which will affect the appearance

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