Recycled concrete energy-saving thermal-insulating building block and preparation method thereof

Abstract

The invention relates to a recycled concrete energy-saving thermal-insulating building block and a preparation method thereof. Four rows of through holes are vertically formed in the building block, two through holes are formed in each of the first row and the fourth row, three through holes are formed in each of the second row and the third row, and the end part of one through hole in each of the second row and the third row is not sealed, so that the end ribs of building blocks are not continuous, the continuous heat transfer among the end ribs is blocked, and the cold-hot bridge effect is reduced; a bottom-sealed structure is adopted at the bottom of the building block, so that the air circulation among through holes of upper and lower building blocks of a wall body is prevented, the grouting and cementation of the building block during vertical construction are enhanced, and the construction strength and shearing strength of the building block are enhanced. The energy-saving thermal-insulating building block consists of recycled aggregate, coal cinders, glass beads, an air entraining agent, cement, coal ash, slag, polypropylene fiber, a water reducing agent and water; the glass beads are added into a building block base body, so that the heat resistance of the building block base body is improved, and the heat transfer of temperature difference between inside and outside of the wall body among building block base bodies is reduced. The building block provided by the invention has the characteristics of being high in mechanical strength and excellent in heat insulation, saves energy, utilizes wastes, is simple in manufacturing method, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a building energy-saving and heat-preserving wall material, in particular to a recycled concrete energy-saving and heat-preserving block and a preparation method thereof. Background technique [0002] In recent years, with the acceleration of urban construction in my country, a large number of abandoned buildings have been demolished, resulting in more and more urban waste. The accumulation and disposal of these construction wastes has become an urgent problem to be solved. The preparation of construction waste into recycled aggregate can solve the problem of environmental pollution caused by construction waste. It not only helps to protect natural aggregate resources from depletion, but also reduces the damage to the environment, which has huge environmental and economic effects. In addition, with the progress and development of the times, people's requirements for building structure functions and building material properties ...

AI Technical Summary

Problems solved by technology

[0004] Many existing thermal insulation blocks only set the thermal insulation material inside the hollow concrete block, and do not heat-insulate the concrete matrix, and the thermal resistance effect of concrete is far worse than that of thermal insulation materials. Therefore, this In the wall made of structural blocks, the temperature difference between the inside and outside is still transferred by the inner and outer walls of the blocks, the wall ribs and the end ribs, which cannot well avoid the thermal bridge phenomenon, and the thermal resistance effect is not ideal

Many existing block end rib seals have a relatively large cross-sectional area, resulting in a large cold and heat bridge effect, which is not conducive to heat preservation and energy saving, and the masonry area of ​​the upper and lower end faces of the block (the vertical two ports of the through hole) is small, Poor masonry strength and shear strength

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