Surface mortar, grinding stone, board and preparation method thereof

Abstract

The invention discloses a surface layer mortar, a millstone, a board and a preparation method thereof, and relates to the technical field of stone materials. The surface layer mortar includes the following components in mass percentage: cement 20‑45%, aggregate 55‑67%, nano silica fume 0‑5.4%, mineral powder 0‑6.5%, redispersible rubber powder 2‑3%, slow Coagulant 0‑0.2%, coagulant 0.1‑0.3%, water reducer 0.1‑0.3%, defoamer 0.05‑0.3%, thickener 0.01‑0.02% and pigment 2‑3%; cement includes high Bailey Special sulfoaluminate cement and optional ordinary cement, high belite sulfoaluminate cement accounts for 20‑100% of the cement mass; the water-material ratio of the surface mortar is 0.08‑0.1. The fluidity, flexural, compressive strength and free expansion rate of the surface mortar meet the requirements of relevant indicators. The grinding stone or plate made of this surface mortar has small shrinkage, no deformation, no cracking, and no alkali return.

Description

Technical field [0001] The present invention relates to the field of stone technology, and in particular, there is a surface layer mortar, a grindstone, a sheet, and a preparation method thereof. Background technique [0002] With the depletion of natural stone resources, as well as green, coordinated, sustainable development and environmental guidance, artificial grinding stone floor and decorative board materials are increasingly attracted by society due to their safety, fire prevention, durability and cost performance. Recognize. [0003] There are currently several forms in the current market, and there are mainly in the market: one is a substrate with an organic epoxy resin material, a polyurethane resin material, and the like, and the other is (white) silicate cement or sulfur aluminum. As an inorganic cement, aluminate cement as an inorganic cement, there is a proportional gypsum compound in silicate cement (white silicate) or sulphate cement, or The multi-system gelling m...

AI Technical Summary

Problems solved by technology

[0005] 1. Although the floor grindstone or decorative board made of organic resin materials has good strength and bright color, the production process has a certain smell, poor safety, and poor environmental protection; at the same time, when used outdoors, the weather resistance is poor and the price is high. be popularized and applied

[0006] 2. Use (white) Portland cement or sulphoaluminate cement, aluminate cement materials to make floor grinding stones or prefabricated panels. Because of its controllable cost and better durability than organic materials, it has won a lot of attention in the market. A certain degree of promotion, but the floor grindstone or prefabricated boards produced have large size deformation and shrinkage, are easy to crack and warp, and are easy to return to alkali, so they are only suitable for some low-end ground applications, and it is difficult to use them on commercial floors or Comprehensive promotion in the field of decorative panels

[0007] 3. The composite cement system is based on a single cement as the cementitious material, and is compounded with other materials. The floor grinding stone or decorative plate produced improves the deformation to a certain extent, but its expansion stability period is long, the late deformation is large, and the raw material The procurement is uncontrollable, and only solves the deformation problem in the early period of time, and the phenomenon of cracking in the later stage is not uncommon

At the same time, raw materials vary greatly from place to place, and the performance of the millstones and decorative plates produced is even more different, which is impossible to control, which greatly increases the difficulty of production and operation for practitioners.

Images