A kind of board seam extrusion material for ALC exterior wall board and preparation method thereof

Abstract

The invention relates to a slab joint shoving material for an ALC external wallboard and a preparation method thereof. The slab joint shoving material is prepared from, by weight, 30-97% of a cementing agent, 1-10 parts of a self-repairing master batch, 1-5 parts of a volume stabilizer, 0-1 part of a defoaming agent, 0-60 parts of filler, 1-10 parts of emulsified paraffin, 0.1-2 parts of a water retaining agent, 0.1-1 part of a thixotropic agent and 0-1 part of a condensing time regulating agent. The slab joint shoving material has the good bonding strength, tensile breaking strength and breaking elongation at break and has the low volume change rate, water absorbing rate and water absorbing speed; meanwhile, the slab joint shoving material further has the certain micro-crack self-repairing, sealing performance and flexibility, and ensures the engineering quality of an autoclaved aerated concrete external wallboard.

Description

technical field [0001] The invention belongs to the field of structural sealing materials, and in particular relates to a board seam grouting material used for splicing autoclaved aerated concrete exterior wall boards and a preparation method thereof. Background technique [0002] With the rapid development of prefabricated buildings, the application of autoclaved aerated concrete strips (ALC) is becoming more and more extensive, which can be used as interior partition walls, floor slabs and exterior wall panels of prefabricated buildings. [0003] The assembly of ALC exterior wall panels usually adopts the close-fitting method of "composite and female grooves". However, in the actual use process, due to the displacement and deformation of the building structure between layers, thermal expansion and contraction of the indoor and outdoor walls, and heat conduction, etc., the panel gaps are likely to occur. In the event of cracking, waterproof damage, light transmission, etc.,...

AI Technical Summary

Problems solved by technology

However, on the one hand, this sealing treatment method has high technical requirements for construction workers, and it is easy to cause problems such as insufficient filling and failure of sealing and waterproof functions; The service life is shortened, the later maintenance is complicated and the cost is high; in addition, the price of organic sealants is expensive, and all use of organic sealants will lead to high construction costs

[0005] In order to overcome the defects in the use of existing sealants, the researchers studied the supporting materials used in the assembly process of the existing ALC boards, but the results showed that most of the matching mortars were unable to improve the bonding performance, elongation at break, and self-healing properties of micro-cracks. , low water absorption and other aspects meet the requirements at the same time, it is only suitable as an adhesive for the assembly of interior wall panels, not suitable for the sealing of ALC exterior wall panels

[0006] The supporting materials of existing autoclaved aerated concrete blocks are masonry mortar and plastering mortar. , The self-repairability is poor, and it can't meet the requirements of grouting treatment during the installation of autoclaved aerated concrete slabs

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