A water-resistant and crack-resistant foam concrete and its preparation method

Abstract

The invention discloses waterproof crack-resistant foam concrete and a manufacture method thereof. The waterproof crack-resistant foam concrete is formed by mixing and stirring of raw materials including, by weight, 220-350 parts of cement, 90-180 parts of microspheres, 1-6 parts of elastic particles, 0.30-0.45 parts of palm filaments, 60-160 parts of water, 2-9 parts of waterproof admixtures and foam. The waterproof crack-resistant foam concrete and the manufacture method thereof have the advantages that the raw materials such as industrial by-products, tailings powder or waste rubber powder and the palm filaments are adopted, and the multi-scale toughening principle on compounding of the elastic particles and fibers is followed, so that strength and crack resistance of the foam concrete are improved, and waste resource utilization is benefited; the adopted waterproof admixtures are highly compatible with other materials, and accordingly, water resistance and durability of the foam concrete are improved effectively; by the prepared foam which is fine, uniform and high in stability, anti-permeability and thermal performance of the foam concrete are improved; the foam concrete is applicable to heat insulation of building walls and roofs and roadbed refilling materials for highways in regions with soft soil and high water level.

Description

1. Technical field [0001] The invention belongs to the field of building materials, and in particular relates to a water-resistant and crack-resistant foam concrete that can be used for building envelope structure heat preservation, roadbed filling and other projects. 2. Background technology [0002] As an inorganic material formed by physical mixing of cement-based slurry and foam, foam concrete has light weight, high fluidity, self-standing after curing, low elastic shock absorption, adjustable strength, insulation Thermal and other physical and mechanical properties, and convenient construction, it is mostly used in building thermal insulation, structural weight reduction, road subgrade filling, municipal road widening, foundation replacement and backfilling and other projects. [0003] In construction engineering, foamed concrete can be used as filling walls, lightweight blocks, concrete component cores and roof insulation materials of frame structures; in road and tunn...

AI Technical Summary

Problems solved by technology

[0004] The powder material of the foam concrete used in today's engineering is almost all cement, or mixed with a small amount of fly ash, which is economical and difficult to overcome the defects of the cement material itself; the quality of foam made of commercially available foaming agents is not good. Stable, easy to cause uneven size of pores and increase of connected pores, resulting in problems such as high water absorption and poor water resistance of foamed concrete, especially in humid or high water level areas, which have a greater impact on the durability of foamed concrete, in case of freeze-thaw cycles even pulverization

At the same time, the shrinkage and deformation of foamed concrete are relatively large, and the resistance to external loads is weak. Cracking of large-sized filling cores or components is more common, which will greatly reduce the thermal performance and strength of the material.

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