High-hardness thermal-insulation plant fiber cement composite ribbon board and manufacturing method thereof

Abstract

The invention discloses a high-hardness thermal-insulation plant fiber cement composite ribbon board. According to the invention, a polyvinyl acetate emulsion immersion treatment process is employed to pretreat the surfaces of plant fiber so as to allow the internal and external surfaces of the plant fiber to be coated with a polymer film, then mist-like paraffin oil is sprinkled, so the entire fiber is compact, obtains certain rigidity and has improved water proofness; and then fly ash is added to modify and replace a part of cement, so the generation amount of hydrated calcium hydrate is decreased, and corrosion resistance of the plant fiber is improved. Thus, the prepared plant fiber cement composite ribbon board has the characteristics of high strength, high hardness, high flatness, thermal insulation performance, etc.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-hardness thermal insulation plant fiber cement composite strip and a manufacturing method thereof. Background technique [0002] Since the 1990s, in terms of the choice of living environment, people are no longer satisfied with ordinary housing, but are pursuing building materials with natural characteristics, that is, environment-friendly new materials. Environmentally harmonious building materials must meet the characteristics of heat preservation and energy saving, sound absorption and sound insulation, water resistance and fire prevention, non-toxic and tasteless, light weight, high strength, and safety. Plant fiber cement composite slats are a new type of environmentally harmonious building materials. Fiber refers to annual plant fibers, mainly crop straws such as corn stalks, wheat stalks, cotton stalks, hemp stalks, etc. [0003] The yield of annual plan...

AI Technical Summary

Problems solved by technology

[0004] However, the anti-coagulation effect of plant fiber extracts on cement and the alkaline erosion of cement hydrates limit the application of plant fiber cement composite strips. The performance is: the highly alkaline liquid in the pores of the cement substrate has an erosion effect on the plant fibers. effect, thus affecting the durability of the composite slats; plant fibers have a high water absorption rate, which will cause volume changes, resulting in a significant decrease in the bending and tensile strength and elastic modulus of the plant fiber cement composite slats after being damp, causing the composite slats to be twisted Deformation, even cracking; plant fibers depolymerize under the action of microorganisms, resulting in a decrease in the degree of polymerization and a corresponding decrease in their tensile strength