Cement-based shrinkage-free joint filling sealing mortar for doors and windows and preparation method and construction method thereof

Abstract

The invention relates to a cement-based shrinkage-free joint filling sealing mortar for doors and windows and a preparation method and a construction method thereof. The sealing mortar is prepared by the components in parts by weight as follows: 100 parts of cement, 0-80 parts of active admixture, 0.01-10 parts of water reducer, 0.01-10 parts of early strength agent, 0.01-10 parts of thickening time control agent, 0-25 parts of expanding agent, 0-30 parts of binder, 0-10 parts of air entraining agent, 0.01-30 parts of plastic retaining agent, 0.01-10 parts of moisture repellent, 0-5 parts of starch ether, 0-150 parts of powder filler and 0-300 parts of aggregate. Compared with the prior art, the mortar provided by the invention has the advantages of no shrinkage, strong binding power, no falling, good anti-permeability, simpleness in construction, efficiency and the like, and can adequately fill joints of doors and windows to ensure the sealing property around the doors and windows, and water is prevented from being seeped into the doors and windows.

Description

technical field [0001] The invention belongs to the technical field of building materials and building construction, and in particular relates to a cement-based non-shrinkage door and window joint sealing mortar and a preparation method and a construction method thereof. Background technique [0002] Leakage of doors and windows, as a common quality problem in construction projects, has always been one of the quality problems that affect the use of construction projects, cause complaints from owners, and have a high repair rate. The selection and quality of caulking and sealing materials is one of the most important factors affecting the quality of doors and windows engineering. The most commonly used caulking materials in the installation of doors and windows are cement mortar, glass fiber, rock wool, wool tops, silicone glue, polysulfide sealing materials, polyurethane sealing materials, etc. Due to the poor cohesive force and deformation ability of ordinary cement mortar...

AI Technical Summary

Problems solved by technology

Due to the poor cohesive force and deformation ability of ordinary cement mortar, it is easy to shrink and crack, and it is prone to leakage; it is sealed with materials such as glass fiber, rock wool, and wool strips, and the construction process is complicated. There is no adhesion between such materials and the door and window frames. Sealing force, sealing, and waterproof effect are poor; sealing materials such as silicone rubber and polysulfide rubber have good bonding force, and the construction is relatively convenient, but they are generally limited to surface sealing, not only have low strength, poor ductility, and are not Anti-aging, easy to peel off, high cost

Polyurethane foam sealant has good adhesion, fast filling construction speed, good elasticity, excellent recovery, and can be suitable for dynamic joints, but polyurethane sealant also has some shortcomings, such as construction quality is not easy to control, foaming agent If the filling is not dense, it will easily cause water leakage. The material itself has poor water resistance, especially alkali water resistance and heat resistance. The storage stability of one-component adhesives is greatly affected by packaging and the outside world. Bubbles and cracks are generated, primer coating is required in many occasions, and the high cost also affects the application of this material

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