Magnesium slag baking-free brick and preparation method thereof

Abstract

The invention provides an environment friendly preparation method for a magnesium slag baking-free brick, aiming to solve the problems that the existing baking-free brick is long in maintenance time, severe in maintenance condition, slow in watering speed of C2S of raw material in aging reaction process, slow in strength increasing, and large in difference of structure and performance of formed hydration products. The raw material of the magnesium slag baking-free brick comprises the following components in percentage: 30-50 percent of reduced magnesium slag, 12-30 percent of fly ash, 24-28 percent of river sand, 4 percent of plaster and 6-10 percent of clinker; the preparation method comprises the following steps of adding water with 6-10 percent of the total gross of the raw material, mixing and press forming the mixture, naturally curing and naturally drying the mixture, and then obtaining the magnesium slag baking-free brick. The magnesium slag baking-free brick provided by the invention uses a large amount of reduced magnesium slag, produced in the magnesium smelting process by adopting a pidgeon process, as main raw material, thus, the pollution of the industrial waste slag to the environment is reduced, and new material is added for the building engineering. The method provided by the invention has the characteristics of simple manufacturing method, easiness in obtaining raw material, short production period and high finished-product brick strength.

Description

technical field [0001] The invention relates to an unburned brick, in particular to an unburned brick prepared with magnesium slag and fly ash as main raw materials. Background technique [0002] Burn-free brick is a wall material made through natural or natural maintenance, neither produces industrial waste, nor emits harmful gases, and does not consume a lot of energy, and can be mixed with other waste, so it plays an important role in the construction field . In recent years, when preparing products, energy saving and emission reduction and low cost have become people's primary considerations, and unburned bricks have become one of the hot spots of building materials. [0003] Unburned bricks can reduce energy consumption and increase the utilization rate of waste residue under the premise of ensuring the performance, so it is a promising building material. At present, the main raw materials for preparing unburned bricks usually include red mud and magnesium slag compou...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the long maintenance time and harsh maintenance conditions of unburned bricks made of existing raw materials, and the C in the raw materials 2 S hydration speed is slow, strength growth is slow, and the structure and performance of the formed hydration products are quite different, and a magnesium slag burning-free magnesium slag with wide sources of raw materials, low cost, high activity and fast hydration speed is provided. Brick and method for its preparation

Images