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Composite fiber reinforced foam concrete and preparation method thereof

A technology of reinforced foam and composite fiber, which is applied in the field of building materials, can solve the problems of low strength, achieve low thermal conductivity, simple formula, and expand the application range

Inactive Publication Date: 2011-09-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the looseness and porosity of foam concrete, the strength is low, and it is especially prone to shrinkage and cracking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The first step is to weigh 300 kg of fly ash, 700 kg of cement, 1000 kg of sand, 500 kg of water, 0.8 kg of polypropylene fiber (organic fiber), 1.4 kg of lignin (plant fiber) and 0.8 kg of water retention by weight Put the ingredients together into the container and stir them evenly with a stirrer;

[0020] In the second step, the early strength agent CaCl 2 13 kg, 2 kg of water reducing agent and 300-600 kg of water are fully mixed, then poured into the mixer and stirred until the mixture is uniform;

[0021] The third step is to pour 6 kg of foaming agent into the foaming machine according to the number of parts by mass to foam, add the foam directly to the mixer in two times for stirring, measure the bulk density after stirring evenly, and cast it into shape, standard curing 28d, and made The apparent density is 400-650kg / m 3 High-quality foam concrete, its shrinkage cracking resistance is increased by 50%, the flexural strength is increased by 50%, and the therm...

Embodiment 2

[0023] The first step is to weigh 100 kg of fly ash, 900 kg of cement, 800 kg of sand, 450 kg of water, 1.0 kg of polypropylene fiber, 2 kg of plant fiber and 0.8 kg of water retaining agent into the container by weight. Mix well with a mixer;

[0024] In the second step, 0.4 kilograms of early strength agent triethanolamine and CaCl 2 7 kg, 2 kg of water reducing agent and 300-600 kg of water are fully mixed, then poured into the mixer and stirred until the mixture is uniform;

[0025] The third step is to pour 12 kg of foaming agent into the foaming machine for foaming according to the number of parts by mass. The foam is directly added to the mixer in two times and stirred. After stirring evenly, the bulk density is measured and painted. The standard maintenance is 28 days. Made of apparent density 250-450kg / m 3 High-quality foam concrete, its shrinkage cracking resistance is increased by 70%, the flexural strength is increased by 100%, and the thermal conductivity is 0....

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Abstract

The invention relates to composite fiber reinforced foam concrete and a preparation method thereof. The foam concrete comprises the following components in parts by weight: 0-400 parts of fly ash, 100-900 parts of cement, 500-1000 parts of sands, 300-600 parts of water, 0.4-1 part of organic fiber, 1-3 parts of plant fiber, 0.2-15 parts of early strength agent, 3-20 parts of foaming agent, 0.5-4 parts of water reducing agent and 0.5-2 parts of water retention agent. The preparation method of the foam concrete comprises the following steps of: generating foams by using the foaming agent, adding the foams to fully stirred cement mortar containing composite fibers and the like and keeping stirring so that the foams are dispersed in the mortar uniformly, measuring the volume weight and carrying out casting forming or coating forming and carrying out standard curing for 28 days. In the invention, industrial and agricultural wastes, such as fly ash, plant fiber and the like, are used, shrinkage crack of the foam concrete is inhibited obviously, and the composite fiber reinforced foam concrete has low price; and the foam concrete has simple formula, good workability, long foam stabilizing time, light weight and low coefficient of thermal conductivity and is suitable for exterior wall thermal insulation, roof thermal insulation and non-load-bearing wall manufacturing.

Description

technical field [0001] The invention relates to a composite fiber-reinforced foam concrete, which can be used for heat preservation of external walls, roof heat preservation and non-load-bearing wall. Belonging to the field of building materials, technical background [0002] Our country is advocating a green economy and a low-carbon economy. Therefore, the utilization of waste resources, the lightweight of building materials, low environmental load and heat preservation and energy saving have become important means of low-carbon economy for today's building materials. [0003] Concrete, as the most widely used building material, has the characteristics of wide application range, low price, easy pouring, firmness and durability, etc. It will still be the main building material that cannot be replaced by modern engineering construction in my country in the 21st century. However, a serious defect of concrete is that it is easy to shrink and crack. In engineering, plain concre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/04C04B18/24
CPCC04B28/04C04B2103/10Y02W30/91C04B14/06C04B16/0633C04B18/08C04B18/24C04B24/2641C04B24/383C04B38/10C04B40/0028C04B24/14C04B2103/302C04B2103/46C04B22/124C04B24/122
Inventor 马一平张乐李国友杨晓杰
Owner TONGJI UNIV
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