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A production method for autoclaved self-insulating lightweight concrete blocks

A lightweight concrete and building block technology, applied in the field of energy-saving building materials, can solve the problems of a large amount of steam, high energy consumption, and unqualified additives, and achieve the effects of reducing production costs, simplifying the production process, and simplifying the production process

Active Publication Date: 2020-05-22
HARBIN TIANSHUN CHEM TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The production of autoclaved curing technology mainly has the following problems. First, the investment in autoclaved curing production equipment is relatively large, with an annual output of 100,000 m 3 The production line needs three 100m 3 The high-pressure reactor, the equipment investment is about 15 million
Second, the autoclave process requires a large amount of steam, which consumes a lot of energy
The third is that the density and compressive strength of the product cannot meet the standard requirements due to the lack of various additives (according to foreign standards, the density is 600kg / m 3 The compressive strength of the block should be 3.5kg / cm 2 Above, while most domestic products are currently at 2.5kg / cm 2 the following)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0045] Preparation of composite foam stabilizer: add 212g of p-cumylphenol into a 1000ml autoclave, add 0.2g of potassium hydroxide as a catalyst, feed nitrogen to drive away the air in the reaction vessel, heat up to 80°C and start adding 440g of ethylene oxide , keep the reaction pressure at 0.2-0.4MPa. Keep the temperature for 1 hour after the addition of ethylene oxide, and release the material when the reaction pressure drops below 0.05 MPa to obtain 649 g of p-cumylphenol polyoxyethylene ether with a polymerization degree of 10. 100 g of p-cumylphenol polyoxyethylene ether with a degree of polymerization of 10, 50 g of cetyl dimethyl ammonium stearate, and 25 g of n-octanol were heated to 50° C. and stirred evenly to obtain a composite foam stabilizer. Prepare the required amount of composite foam stabilizer according to the above method and ratio of materials.

[0046] Preparation of quick-setting enhancer: Dissolve 700g (about 1mol) of industrial aluminum sulfate in 1...

Embodiment 1

[0049] 400kg of No. 425 cement, 300kg of 20-40 mesh river sand, 350kg of fly ash, and 400kg of water are placed in a cement mixing tank and stirred evenly. Add 1.5kg composite foam stabilizer, 1.5% SZ-1 quick-setting enhancer (calculated by cement addition), 20kg concentration of 30% hydrogen peroxide, 200gHT1 catalyst, stir vigorously and put it into the mold frame for curing. After 6 hours, take off the mold frame, continue curing at room temperature for 18 hours, cut into products of fixed size, continue curing at room temperature until 28 days later, and measure the density to 0.61g / cm 3 , the compressive strength is 4.5Kg / cm 2 .

Embodiment 2

[0051] 400kg of No. 425 cement, 350kg of river sand of 20-40 mesh, 300kg of fly ash, and 400kg of water are placed in a cement mixing tank and stirred evenly. Add 1.5kg composite foam stabilizer, 1.5% SZ-1 quick-setting enhancer (calculated by cement addition), 20kg concentration of 30% hydrogen peroxide, 200gHT1 catalyst, stir vigorously and put it into the mold frame for curing. After 6 hours, take off the mold frame, continue curing at room temperature for 18 hours, cut into products of fixed size, continue curing at room temperature until 28 days later, and measure the density to 0.63g / cm 3 , the compressive strength is 4.2Kg / cm 2 .

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PUM

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Abstract

The invention relates to a production method for a steam-free self-insulating lightweight concrete block. The method comprises the following steps: adding river sand, coal ash and water into cement; stirring to form mortar; adding a compound foaming stabilizer, a quick setting enhancer, a hydrogen peroxide decomposition catalyst and hydrogen peroxide; stirring and mixing uniformly; injecting into a model frame; foaming in the model frame; shaping; curing, thereby acquiring an initially cured concrete block; cutting according to requirement; maintaining in a maintaining room for 7 days, thereby acquiring the steam-free self-insulating lightweight concrete block. The production method has the advantages that the production process is simple and energy-saving; a technique for maintaining under normal temperature and normal pressure is adopted; the energy source required by steam pressure maintenance is saved; the production process is simplified; the production cost is lowered; the energy is saved and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of energy-saving building materials, in particular to a production method of concrete blocks. Background technique [0002] Self-insulating lightweight concrete block has the characteristics of fire resistance and fire prevention, heat insulation, light weight, and earthquake resistance. Functional new lightweight foam energy-saving blocks. This new type of block is light in weight, has good thermal insulation performance and sound insulation effect, and can greatly reduce the construction cost and the use cost of the house. It is one of the new wall materials promoted by the state. In addition, the aggregates in this kind of blocks can use a large amount of industrial waste such as fly ash, slag, and stone powder, thereby reducing waste discharge, effectively improving ecological conditions, and protecting the ecological environment. [0003] Since the 1990s, foreign countries have started to produce and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/04C04B28/08C04B28/02C04B24/32C04B24/12B28B1/50B28B11/24
CPCB28B1/50B28B11/245C04B28/021C04B28/04C04B28/08C04B38/02C04B40/0039C04B2201/20C04B2201/50C04B24/32C04B24/12C04B24/02C04B24/04C04B24/00C04B22/085C04B24/283C04B24/123C04B22/062C04B38/0067C04B14/068C04B18/08C04B22/002C04B22/068
Inventor 孟凡钧刘波刘奇航孟子顺张会车都
Owner HARBIN TIANSHUN CHEM TECH DEV CO LTD