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A kind of production method of concrete pile without autoclaving and pouring residual slurry

A technology of concrete piles and production methods, applied in the direction of strengthening molding, etc., can solve the problems of high pH value, difficult handling, high management requirements, etc., and achieve the effects of improving durability, reducing investment costs, and saving energy

Inactive Publication Date: 2011-12-07
JIANHUA CONSTR MATERIALS (JIANGSU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them: in the production process of pipe piles, although some of the waste produced in the process of pouring excess slurry after centrifugal molding can be sold, some of them are not easy to deal with; while the high-pressure steam curing process requires consumption of the pipe pile production process. Two-thirds of all steam consumption in the system, and the steam after heat exchange becomes condensed water, and the pH value of the water is as high as 13; since the high-pressure steam curing process requires autoclave equipment, which is a special equipment, the management requirements are higher

Method used

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  • A kind of production method of concrete pile without autoclaving and pouring residual slurry

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Experimental program
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Effect test

Embodiment 1

[0024] To produce PHC pipe piles, the concrete mix ratio is composed of a mixture of cement and mineral powder, sand, gravel, high-efficiency water reducer, mineral synergist and water, wherein the water-cement ratio is 0.3, and the specific surface area of ​​the cementitious material is 420kg / m 3 The fineness modulus of the sand is 2.5, and the sand rate is 30%; the particle size of the gravel is 5mm-25mm, and the crushing value is 5%; 0.7%; wherein said mineral synergist, its dosage is 10% of cementitious material, and described mineral synergist is made of 50% finely ground gypsum and 50% microsilica;

[0025] production process:

[0026] First put sand, cementitious material, and mineral booster into the concrete mixer and stir until uniform, then in turn the required water reducer and 75% of the water in the entire formula, and then stir until uniform, and finally put in crushed stone and The remaining 25% of water is then stirred until uniform;

[0027] Evenly put the...

Embodiment 2

[0032] To produce PHC pipe piles, the concrete mix ratio is composed of a mixture of cement and mineral powder, sand, gravel, high-efficiency water reducer, mineral synergist and water, wherein the water-cement ratio is 0.2, and the specific surface area of ​​the cementitious material is 300kg / m 3 ; The fineness modulus of the sand is 2.0, and the sand rate is 27%; the particle size of the crushed stone is 5mm-25mm, and the crushing value is 5%; 3% of the total cementitious material; wherein said mineral synergist is 10% of the cementitious material, and said mineral synergist consists of 80% ground gypsum and 20% microbeads;

[0033] production process:

[0034] First put sand, cementitious material, and mineral booster into the concrete mixer and stir until uniform, then in turn the required water reducer and 75% of the water in the entire formula, and then stir until uniform, and finally put in crushed stone and The remaining 25% of water is then stirred until uniform;

...

Embodiment 3

[0040] To produce PHC pipe piles, the concrete mix ratio is composed of a mixture of cement and mineral powder, sand, gravel, high-efficiency water reducer, mineral synergist and water, wherein the water-cement ratio is 0.4, and the specific surface area of ​​the cementitious material 450kg / m 3 The fineness modulus of the sand is 3.5, and the sand rate is 44%; the particle size of the gravel is 5mm-25mm, and the crushing value is 5%; 1.5%; wherein said mineral synergist its dosage is 10% of the cementitious material, and said mineral synergist consists of 40% ground gypsum and 60% microbeads;

[0041] production process:

[0042] First put sand, cementitious material, and mineral booster into the concrete mixer and stir until uniform, then in turn the required water reducer and 75% of the water in the entire formula, and then stir until uniform, and finally put in crushed stone and The remaining 25% of water is then stirred until uniform;

[0043] Evenly put the pre-mixed c...

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Abstract

The invention discloses a production method of concrete piles free of autoclaving and pouring of residual slurry: first, sand, cementitious material, and mineral booster are put into a concrete mixer and stirred until uniform, and then water-reducing agents and the whole formula are put in successively. Add 75% of the water in the mixture, then stir until it is uniform, and finally put in gravel and the remaining 25% of the water and stir until it is even; put the pre-mixed concrete mixture in step A evenly into the mold with the steel cage skeleton installed In the middle, after the cloth is finished, mold closing and prestressed tensioning are carried out, and the tensioning force is about 70% of the total tensile strength of the prestressed steel bars; after the prestressed tensioning, the mold containing the concrete is subjected to centrifugal forming operations until the concrete Pile molding; after the centrifugation is completed, the mold equipped with concrete and steel skeleton cages is subjected to atmospheric pressure steam curing, and after atmospheric pressure steam curing, demoulding and cooling can be completed; the temperature of the atmospheric pressure steam curing is 75-95 ℃, curing time is 4-6 hours.

Description

technical field [0001] The invention relates to a production method of a concrete pile free from autoclaving and pouring of residual slurry. Background technique [0002] Prestressed high-strength concrete piles are widely used in the construction of buildings, roads, bridges, docks and other projects because of their superior performance. At present, the main production process of high-strength concrete piles is: batching→mixing→cloth→mold closing→prestressed tension→centrifugal forming→residual slurry pouring→atmospheric steam curing→demoulding→high pressure steam curing→finished product. Among them: in the production process of pipe piles, although some of the waste produced in the process of pouring excess slurry after centrifugal molding can be sold, there is still a part that is not easy to deal with; and the high-pressure steaming process requires consumption of the pipe pile production process. Two-thirds of all steam consumption in the plant, and the steam after he...

Claims

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Application Information

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IPC IPC(8): B28B21/68B28B21/66C04B28/00
Inventor 苟德胜陈巧
Owner JIANHUA CONSTR MATERIALS (JIANGSU) CO LTD
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