Novel non-autoclaved concrete brick and binder thereof

Abstract

The invention belongs to the technical field of building materials and discloses a novel non-autoclaved concrete brick and a binder thereof. A novel concrete is prepared according to the following steps: utilizing a spherical high-performance water-absorbent resin with water absorbent rate of 15-18 to absorb seawater, thereby forming a swelling aggregate; blending with materials, such as cement, at a ratio; adding seawater and then stirring. Freight volume of island-reef engineering building materials can be greatly reduced. The novel non-autoclaved concrete brick has an average compressive resistance value of brick of 28.99MPa, breaking strength of 4.58MPa, hole rate of brick of 20.1%, moisture content of 7.3%, water absorption of 15.4% and density of 1467kg / m3. After the binder providedby the invention is cured, the thickness of bonding layer is 2-3mm, tensile shear bond strength is more than or equal to 1.5MPa, tensile bond strength is more than or equal to 1.0MPa, compressive strength is more than or equal to 8.0MPa, shrinkage value is less than or equal to 1.0mm / m, 50-times freezing thawing strength loss is less than or equal to 2.0% and bonding curing time is 1h-5h.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a novel autoclaved-free concrete brick and its adhesive. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] The islands and reefs in the South China Sea are far away from the mainland, and the available construction resources are scarce. There are problems in the construction of islands and reefs, such as transportation and construction difficulties and long periods of time. It is impossible to prepare rapid construction materials by traditional methods such as firing clay bricks on islands and reefs. Preparation of rapid construction materials based on concrete is a more reliable technical approach. In order to reduce the transportation volume of ordinary concrete coarse and fine aggregates and realize local materials for island and reef engineering concrete materials, the traditional technical m...

AI Technical Summary

Problems solved by technology

[0006] (1) Ordinary sintered bricks need to use non-renewable resources—clay, which cannot meet environmental protection requirements; islands and reefs do not have the conditions for a large amount of clay raw materials;

[0007] (2) The gravel required for traditional concrete bricks needs to be transported from the mainland, which is too expensive; moreover, such concrete bricks need to be cured by autoclaving, and islands and reefs do not have the conditions to build large-scale autoclaved curing rooms;

[0008] (3) The bonding performance of traditional ordinary masonry mortar is very poor, and the special adhesive must have a small amount of high-efficiency bonding ability

[0010] At present, there are few research results on seawater aggregate concrete, mainly focusing on preparation technology, mechanical properties, functional characteristics, etc.

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