Raw wood pulp fiber reinforced calcium silicate sheet

Abstract

The invention discloses a raw wood pulp fiber reinforced calcium silicate sheet which is mainly prepared from the following components by weight percentage: 6-12% of raw wood pulp fiber, 1-3% of glass fiber, 15-20% of lime, 35-46.04% of quartz, 20-30% of common silicate cement, and 1-2% of expanded perlite. The raw wood pulp fiber reinforced calcium silicate sheet has the advantages as follows: the early strength effect of Na+ salt on the silicate cement is utilized, so that the standing time of the plate-making process is shortened, in addition, the influence of the Na+ salt on the silicate cement is avoided, the problem that the raw wood pulp is directly used for production of a calcium silicate sheet is solved, and wood can be comprehensively utilized; due to the early strength of sodium salt on cement, the final setting time of cement is shortened, the stripping time is shortened (the original stripping time is 4-7 hours, and the current stripping time is 2-5 hours), and the strength is high; the appearance is attractive; the cost is low; the raw material is low in cost, and contains fewer impurities; the raw wood pulp fiber is used to replace rock wool; the 100% wool-free plate is produced; the raw wood pulp fiber reinforced calcium silicate sheet is low in cost, and more environmental-friendly.

Description

technical field [0001] The invention relates to a building material, in particular to a raw wood pulp fiber reinforced calcium silicate board. Background technique [0002] Fiber-reinforced calcium silicate boards are widely used in various buildings because of their low density, fire prevention, strong sound insulation, anti-corrosion and moisture-proof, and high strength. The existing fiber-reinforced calcium silicate boards are divided into asbestos-containing and asbestos-free two kinds. The existing asbestos-containing fiber-reinforced calcium silicate board is produced. The reinforcing fibers used are mainly waste kraft paper, glass fiber, asbestos, etc., and other raw materials are CaO, SiO2, expanded perlite and ordinary Portland cement. It is made through shredded paper refining, asbestos loosening, pulping, pulp vacuum dehydration, molding and demoulding, autoclaving reaction, drying, edging, and finished product. The fiber that this prior art uses is paper fiber...

AI Technical Summary

Problems solved by technology

The price of raw materials is high, there are many impurities, and the pollution is serious, and they must be shredded and refined before they can be used. The processing process consumes a lot of power and the process is complicated

In addition, when the raw wood pulp is used as the reinforcing fiber of the calcium silicate board in the conventional method, the Na in the raw wood pulp + The strength of the fiber-reinforced calcium silicate board made by the existence of the fiber is low, and the appearance is black spots, which cannot be used or affect the use

[0003] Chinese patent No. 201010197118 discloses the patent document titled: Lime Bamboo Pulp Fiber Reinforced Calcium Silicate Board. This document discloses the technical scheme of using Lime Bamboo Pulp to manufacture calcium silicate board as the main raw material. Although a breakthrough has been made, However, due to the use of lime bamboo pulp as raw material, the softening time of bamboo pulp during production is long, the efficiency is low, and the variety of raw materials is single

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