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External expansion type anti-air-shrinkage concrete block and preparation method thereof

A concrete block and expansion technology, applied in the field of concrete, can solve the problems of poor heat dissipation and large temperature difference between inside and outside

Inactive Publication Date: 2021-02-02
黎诗剑
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, concrete is a poor conductor of heat, has poor heat dissipation, and has a large temperature difference between inside and outside.

Method used

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  • External expansion type anti-air-shrinkage concrete block and preparation method thereof
  • External expansion type anti-air-shrinkage concrete block and preparation method thereof
  • External expansion type anti-air-shrinkage concrete block and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] see Figure 1-2 , an external expansion type anti-drying shrinkage concrete block, comprising a concrete block body 1, the interior of the concrete block body 1 near the edge is inlaid with a steel skeleton 2, and the steel skeleton 2 is along the length direction of the concrete block body 1 A plurality of evenly distributed node reinforcement balls 3 are connected, and the node reinforcement ball 3 is connected with a heat-shrinkable centripetal rod 4 near the center of the section of the concrete block body 1;

[0046] Concrete block body 1 includes the following raw materials in parts by weight: 50 parts of Portland cement, 30 parts of superfine fly ash, 2 parts of water reducer, 1 part of activator, 10 parts of expansion agent, 1.5 parts of polypropylene fiber, 40 parts of water and 0.3 parts of polymer emulsion.

[0047] see Figure 2-4 The heat-shrinkable centripetal rod 4 includes a plurality of unit migration pieces 41 that are distributed in a staggered mann...

Embodiment 2

[0061] The concrete block body 1 includes the following raw materials in parts by weight: 60 parts of Portland cement, 40 parts of superfine fly ash, 3.5 parts of water reducer, 2.5 parts of activator, 15 parts of expansion agent, 2.2 parts of polypropylene fiber, 45 parts of water and 0.5 parts of polymer emulsion.

[0062] The rest are consistent with the embodiment.

Embodiment 3

[0064] Concrete block body 1 includes the following raw materials in parts by weight: 70 parts of Portland cement, 50 parts of superfine fly ash, 5 parts of water reducer, 4 parts of activator, 20 parts of expansion agent, 3 parts of polypropylene fiber, 50 parts of water and 0.8 parts of polymer emulsion.

[0065] The rest are consistent with the embodiment.

[0066] The present invention can realize the innovative introduction of the steel skeleton 2 as the internal skeleton of the concrete block body 1, which plays an integral role in shaping the concrete block body 1, and through the heat-shrinkable centripetal rods on the steel skeleton 2 extending toward the center 4. When the concrete block body 1 is formed, it is heated to trigger thermal shrinkage, and through the cooperation between the air-entraining base ball 6 and the air-entraining fiber tube 5, the gas is continuously released to form small and uniform pores, so that the formed The concrete block body 1 has a p...

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Abstract

The invention discloses an external expansion type anti-air-shrinkage concrete block and a preparation method thereof, and belongs to the technical field of concrete. According to the concrete block,a thermal shrinkage centripetal rod extending towards the center can be innovatively arranged on a steel reinforcement framework, thermal shrinkage action is triggered by heating when a concrete blockbody is formed; an air-entraining base ball and an air-entraining fiber pipe are matched to continuously release air to form fine and uniform air holes, so that the formed concrete block body has a porous structure; meanwhile, the air-entraining fiber pipe can be stretched and straightened during ventilation, after the concrete block body is finally formed, the thermal shrinkage centripetal rod generates external expansion force on the concrete block body due to cooling after heat shrinkage, and shrinkage of concrete after condensation is counteracted; and the air-entraining fiber pipe assists the thermal shrinkage centripetal rod in forming expansion force in other areas, so that the air shrinkage phenomenon of the concrete block body can be obviously reduced, and the forming quality ofthe concrete block body is obviously improved.

Description

technical field [0001] The invention relates to the technical field of concrete, and more specifically relates to an external expansion type anti-shrinkage concrete block and a preparation method thereof. Background technique [0002] Air-entrained concrete block is a new type of building material that is lightweight, porous, thermal insulation, good fire resistance, nailable, sawable, planable, and has certain earthquake resistance. As early as the early 1930s, China began to produce this product, and it was widely used in high-rise frame structure buildings. It is an excellent new building material and has the advantages of environmental protection. [0003] The general quality of aerated concrete blocks is 500-700 kg / m3, which is only equivalent to 1 / 4-1 / 3 of clay bricks and lime-sand bricks, and 1 / 5 of ordinary concrete. It is a lighter type of concrete. It is suitable for filling walls of high-rise buildings and load-bearing walls of low-rise buildings. The use of th...

Claims

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Application Information

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IPC IPC(8): E04C1/41B28B23/02B28B1/14C04B28/04C04B111/34
CPCB28B1/14B28B23/02C04B28/04C04B2111/34E04C1/41C04B18/08C04B2103/302C04B2103/0068C04B22/002C04B24/24C04B16/0633C04B12/04C04B22/147
Inventor 黎诗剑
Owner 黎诗剑
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