Coal gangue novel lightweight wall material and preparation method

Abstract

The invention discloses a coal gangue novel lightweight wall material and a preparation method thereof. The novel lightweight wall material is prepared from the raw materials by mass percent of 43-84.5% of coal gangue, 5-20% of fluxing agent, 0.5-2% of foaming agent and 10-35% of perlite by the steps of mixing, spray granulation, die filling and sintering. The wall material disclosed by the invention has the characteristics of light weight and high impact strength and a lightweight, thermal-insulation, durable and environment-friendly novel lightweight wall material, wherein the volume weight is 250-290kg/m<3> and the impact strength is not lower than 2kJ/m<2>.

Description

technical field [0001] The invention relates to a wall material and a preparation method thereof. More specifically, it relates to a novel lightweight wall material of coal gangue and a preparation method thereof. Background technique [0002] The production of coal gangue sintered new wall materials not only utilizes a large amount of solid waste such as coal gangue, but also effectively protects the ecological environment, and truly realizes the basic national policy of sustainable development in my country. [0003] Building materials are an important material basis for building a well-off society, and an important industry for achieving national economic growth and improving residents' living conditions. New building materials have a very broad space for development. Under the situation that my country's wall material innovation is deepening, more and more cities and regions have banned the production and use of solid clay bricks, and vigorously advocate and develop var...

AI Technical Summary

Problems solved by technology

[0007] Up to now, the external walls in our country generally adopt the wall structure of autoclaved aerated concrete blocks plus insulation layer, and there are some restricted parts in this wall structure.

Autoclaved aerated concrete blocks have a high water absorption rate, and after absorbing water, their strength decreases and their thermal insulation properties deteriorate. Therefore, they cannot be used in places where the building’s elevation is below ±0.00 or where it has been soaked in water for a long time or is often subjected to alternating wet and dry conditions; when the interface bonding strength is low, it is easy to interface seam

The surface strength of aerated concrete blocks is low, it is easy to powder, and it is not easy to bond with ordinary mortar, so that the mortar joints are cracked and the plaster layer is hollow; the wall of autoclaved aerated concrete blocks is easy to leak

Cracks in the wall due to the aforementioned reasons, especially when openings for doors and windows are directly reserved on the wall, cracks are generated due to the inconsistency between the cement mortar and other materials filled between the window frame and the wall and the shrinkage value of the block material, which may easily cause water seepage or Water leakage phenomenon. The air holes inside the aerated concrete block are closed and independent spherical structures. The water seepage has the characteristics of fast first and then slow. Once wet, it is not easy to dry, which will affect the normal use of the house.