Crack-resistant, thermal-insulation and fire-proof mortar dry powder material and preparation method

Abstract

The invention provides a flax fiber cement-based cementing material and a preparation method thereof. The preparation method comprises the steps of carrying out oven-drying on flax wastes carded in a flax weaving process at a temperature of 50-55 DEG C, and cutting into flax fibers of which the lengths are less than 10mm; mixing the flax fibers of which the weight ratio is 2.5-3.5%, rubber powder for construction of which the weight ratio is 0.4-0.6% and a certain amount of a cement mortar matrix material which comprises polystyrene beads and the balance of cement and sand based on an energy requirement to obtain a cement mortar dry powder material of flax fiber, polystyrene beads, cement and sand. The cement-based cementing material of flax fiber and polystyrene beads disclosed by the invention has advantages of superior tensile strength, crack resistance, thermal insulation property, fire resistance and low cost; furthermore, since an excellent adhesion strength is generated between the cement-based cementing material prepared by the invention and a base, the cement-based cementing material can be used as a cement-based cementing material for an exterior wall liner of a building. The flax fiber cement-based cementing material disclosed by the invention also opens up a new way for processing flax wastes carded in the flax weaving process, thereby being conducive to the rational utilization of resources and environmental protection.

Description

technical field [0001] The invention relates to a building material, in particular to a cement cracking, heat preservation and fireproof mortar. Background technique [0002] Adding fibers to cement mortar can improve the crack resistance of cement mortar. At present, there are many public reports on this aspect. For example: the application number is 93104062.0, the name is "grinding fiber cement"; the application number is 200710144348.8, the name is "a preparation method of high polymer modified plant fiber cement composite material"; Fiber cement concrete mixture"; the application number is 200510017967.1, and the technical scheme disclosed in patent documents such as "straw fiber cement composite material" and so on. However, in the prior art, the fibers added to the cement are mainly synthetic fibers such as polypropylene fibers, and its cost is relatively high, which limits its application. It is generally only used for some special-purpose materials, and it is not ...

AI Technical Summary

Problems solved by technology

However, in the prior art, the fibers added to the cement are mainly synthetic fibers such as polypropylene fibers, and its cost is relatively high, so its application is limited. It is generally only used for some special-purpose materials, and it is not easy to be popularized as building exterior wall plastering materials. application

There are also straw fibers, wood fibers, etc. added to cement, but their poor mechanical properties also limit their popularization and application.