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Production method of non-surplus-slurry and non-autoclaved prestressed concrete pipe pile

A technology for concrete pipe piles and production methods, which is applied in the direction of reinforcement molding, ceramic molding machines, manufacturing tools, etc., and can solve problems such as high cost and difficulty in popularization and application

Active Publication Date: 2015-10-07
JIANGSU DONGPU PILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem of these two methods is that the cost is very high and it is difficult to popularize and apply

Method used

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  • Production method of non-surplus-slurry and non-autoclaved prestressed concrete pipe pile
  • Production method of non-surplus-slurry and non-autoclaved prestressed concrete pipe pile
  • Production method of non-surplus-slurry and non-autoclaved prestressed concrete pipe pile

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of production method of free autoclaved prestressed concrete pipe pile without residual slurry, comprises the steps:

[0019] Step 1. Preparation of raw materials, in parts by weight, the raw materials are composed of the following components: cement 390, fly ash 100, sand 790, water 133, stone 1142, new polycarboxylate superplasticizer 8, activator 5 ;

[0020] Step 2, cloth, mold clamping and tension processing;

[0021] Step 3, performing low-speed, low-medium-speed, medium-speed and high-speed centrifugation steps successively;

[0022] In the low-speed centrifugation step, the rotating speed is 75r / min, and the time is 5min. The rotating speed of the low-medium speed centrifugation is 139r / min, and the time is 1.5min. 545r / min, the time is 2min;

[0023] Step 4, steaming at room temperature, the steaming at room temperature includes three stages of heating, constant temperature and cooling, the time is respectively 1.2h in the heating stage; 3h in the con...

Embodiment 2

[0031] A kind of production method of free autoclaved prestressed concrete pipe pile without residual slurry, comprises the steps:

[0032] Step 1. Preparation of raw materials, in parts by weight, the raw materials are composed of the following components: cement 404, fly ash 112, sand 739, water 140, stone 1128, new polycarboxylate superplasticizer 13, activator 15 ;

[0033] Step 2, cloth, mold clamping and tension processing;

[0034] Step 3, performing low-speed, low-medium-speed, medium-speed and high-speed centrifugation steps successively;

[0035] In the low-speed centrifugation step, the rotating speed is 70r / min, and the time is 5min. The rotating speed of the low-medium speed centrifugation is 125r / min, and the time is 1.8min. It is 459r / min, and the time is 1.9min;

[0036] Step 4, steaming at room temperature, the steaming at room temperature includes three stages of heating, constant temperature and cooling, the time is respectively 1.3h in the heating stage;...

Embodiment 3

[0044] A kind of production method of free autoclaved prestressed concrete pipe pile without residual slurry, comprises the steps:

[0045] Step 1. Preparation of raw materials, in parts by weight, the raw materials are composed of the following components: cement 417, fly ash 115, sand 670, water 140, stone 1150, new polycarboxylate superplasticizer 14, activator 19 ;

[0046] Step 2, cloth, mold clamping and tension processing;

[0047] Step 3, performing low-speed, low-medium-speed, medium-speed and high-speed centrifugation steps successively;

[0048] In the low-speed centrifugation step, the rotating speed is 73r / min, and the time is 4min. The rotating speed of the low-medium speed centrifugation is 136r / min, and the time is 2.4min. The rotating speed of the medium-speed centrifugation is set to 230r / min. It is 533r / min, and the time is 1.2min;

[0049] Step 4, steaming at room temperature, the steaming at room temperature includes three stages of heating, constant temp...

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Abstract

The invention discloses a production method of a non-surplus-slurry and non-autoclaved prestressed concrete pipe pile, which comprises the following steps of preparing raw materials, performing material distribution, die assembly and tensioning treatment, performing low speed, low medium speed, medium speed and high speed centrifugation sequentially, and performing normal temperature steam curing, wherein in the step of preparing the raw materials, the raw materials consist of the following ingredients in parts by weight: 380-420 parts of cement, 80-120 parts of pulverized fuel ash, 650-790 parts of sand, 130-160 parts of water, 1050-1200 parts of gravel, 8-15 parts of novel polycarboxylate superplasticizer and 5-20 parts of excitant; in the step of the low speed centrifugation, a rotating speed is 70-75r / min and the time is 3-5min; in the step of the low medium speed centrifugation, the rotating speed is 120-140r / min and the time is 1.5-2.5min; in the step of the medium speed centrifugation, the rotating speed is set as 230-250r / min; in the step of the high speed centrifugation, the rotating speed is set as 450-550r / min; and the step of normal temperature steam curing comprises three stages, namely the heating stage, the constant temperature stage and the cooling stage. The production method can reduce the quantity of surplus slurry greatly, so that energy conservation and environmental protection are facilitated; the energy conservation and emission reduction are further realized only by an atmospheric pressure steam curing process; and the production method does not require solid microbead raw materials, so that the cost of the non-autoclaved prestressed concrete pipe pile is lowered greatly.

Description

technical field [0001] The invention belongs to the field of pipe pile production, in particular to a production method of no-remaining slurry-free autoclaved prestressed concrete pipe piles. Background technique [0002] Prestressed concrete pipe piles have the advantages of reliable quality and resource saving, and have been widely used in engineering construction. However, the existing technology has not yet achieved the ideal effect. During centrifugation, a large amount of residual slurry will be produced. These residual slurry contains moisture and gel components, which will affect the quality of the finished pipe pile. At the same time, the existing production process needs to go through two processes of atmospheric pressure steaming and high pressure steaming, which consume a lot of energy. For the above-mentioned problems, technicians have made improvements. For the former, the main existing method is to add a tackifier to the raw materials. For the latter, the onl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B21/60B28B21/30C04B28/00C04B24/16
CPCB28B21/30B28B21/60C04B14/06C04B18/08C04B24/16C04B28/00
Inventor 颜成华颜井意
Owner JIANGSU DONGPU PILE
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