Key technology scheme according to improvement for insulation and material mechanics performance of aerated concrete

Abstract

The invention relates to a key technical scheme for promoting thermal insulation and material mechanical performances of aerated concrete, which belongs to the building envelope insulation technical field. The invention promotes the performances of the aerated concrete in two steps to facilitate the concrete to be capable of satisfying the requirements of the national construction energy saving (50-80 percent) standard: the first step is to improve the thermal insulation performance until the stem thermal conductivity coefficient is smaller than or equal to 0.05W / (m question mark K); the second step is to strengthen the material mechanical performance until the cube compressive strength is larger than or equal to 3.5MPa and larger than or equal to 2.0MPa after 100 times of freeze-thaw. The first step includes: firstly, minimizing the density of the aerated concrete; secondly, maximizing the porosity; thirdly, optimizing the pore structure. The second step includes: firstly, enhancing additive; secondly, strengthening fibers; thirdly, optimizing the coordination; fourthly, optimizing the mixing process; fifthly, improving the maintenance method (including CO2, variable pressure steam nourishing, middle temperature and high humidity and strength agent surface maintenance).

Description

technical field [0001] The invention relates to a key technical scheme for improving the thermal insulation and mechanical properties of materials of aerated concrete, and belongs to the technical field of thermal insulation of building enclosure structures. Background technique [0002] Building envelope insulation technology is generally divided into four categories: sandwich insulation, internal insulation, external insulation and self-insulation. [0003] Due to the poor seismic performance of the sandwich insulation structure, this insulation technology has basically been eliminated in our country. [0004] It is difficult to avoid thermal (cold) bridges in internal insulation. Thermal (cold) bridges are the weak links of the building envelope, usually appearing at the corners of walls and structural columns, ring beams and windows at the junction of internal and external walls. (Cold) air penetrates into the room through such weak points, and it is easy to form moistu...

AI Technical Summary

Problems solved by technology

However, high porosity and low density simultaneously bring about a decline in the mechanical properties of the material.