Anti-cracking mortar for repairing decoration pipeline wall slots

Abstract

The invention belongs to the technical field of building mortars, and discloses an anti-cracking mortar for repairing decoration pipeline wall slots. The anti-cracking mortar is prepared from, by weight, 0.9-1.5 parts of Portland cement, 0.2-0.6 part of gypsum powder, 4.2-6.4 parts of medium sands, 0.8-1.2 parts of water and 0.16-0.24 part of fibers, and additives which are 0.14-0.20 wt% of a water retaining agent and 0.14-0.20 wt% of rubber powder are further added. The problem of scars formed by hollowing and cracking of a subsequent fine decoration surface after repairing of pipeline wall slots with mortars in the prior art is solved in the invention. The anti-cracking mortar for repairing decoration pipeline wall slots has a certain repairing bonding strength, has a small shrinkage ratio and a short hydration time in the hydration and condensation process, and realizes the non-cracking of repaired walls and wall slots.

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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