Method for preventing and controlling cracks of hollow wallboard for building

Abstract

The invention relates to an installing method of a hollow wallboard for a building, in particular to a construction method for eliminating cracks of the hollow wallboard generated by self-gravity settling as priority, belonging to the technical field of buildings. The method comprises the following steps: preparing self-leveling floor mortar doped with a water-reducing agent and a cement expanding agent; wetting the floorslab part of the bottom end of the wallboard with water; drilling a grouting hole leading to a hollow cavity in the wallboard at the lower end of the wallboard; applying pressure to grout mortar to the grouting hole; leading the mortar to flow and fill part of the hollow cavity of the wallboard and bottom seams between floorslabs; and forming a mortar grouting column in the hollow cavity. The installing method can avoid the occurrence of most common cracks after the hollow wallboard is constructed on the basis that the existing construction method of the light wallboard and the basic mixing ratio of the raw materials used for the production of the wallboard are not changed basically.

Description

technical field [0001] The invention relates to a method for installing a hollow wallboard for construction, in particular to a construction method for preventing cracks in a hollow wallboard wall, and belongs to the technical field of construction. Background technique [0002] With the advancement of construction industrialization, the production of hollow wall panels in the world and in my country has entered a stage of rapid development. In the past ten years, the large-scale and mechanized production lines of extruded wall panels from Germany, Finland, Spain and other countries have entered our country one after another; the lightweight slats used for building partition walls in our country have also developed rapidly. The production of lightweight wall panels can consume a large amount of industrial waste, high production efficiency, less raw materials used in production, fast construction speed when building walls, can significantly reduce the weight of buildings, and...

AI Technical Summary

Problems solved by technology

However, after more than ten years of construction engineering practice-even the slats produced by imported slat production lines, the problem of cracks in the walls constructed by them has been lacking in effective prevention methods. The body crack problem could not be solved and was forced to close down

According to the current technical regulations for wallboard installation, cracks at the joints of wallboards are caused by defects in the construction process; general raw material preparation in the production process of wallboards, due to the natural shrinkage of batch materials after drying, shrinkage cracks of wallboards cannot be avoided

[0007] The current wall panel installation process stipulates: "Fill the bottom joint with fine stone concrete", but in actual installation and construction, if the bottom joint is filled with fine stone concrete, the fine stone and mortar are easy to separate, which is inconvenient to operate

Construction workers are used to filling with mortar, which cannot fill all the gaps in the bottom joints of the wall panels. This operation makes the bottom joints of the wall panels empty, and the wall panels will slowly sink under the action of gravity, resulting in cracks

[0008] Most of the raw materials for the production of light-weight wallboards do not use cement water reducers and cement expansion agents, so drying shrinkage cracks are unavoidable

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