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Production method of autoclaved prestressed concrete pipe pile without excess slurry

A technology for a concrete pipe pile and a production method, which is applied in reinforcement molding, ceramic molding machines, manufacturing tools, etc., can solve the problems of high cost, difficult to popularize and apply, and achieves the advantages of reducing excess slurry, facilitating popularization and application, and reducing costs. Effect

Active Publication Date: 2017-06-06
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 autoclaved prestressed concrete pipe pile without excess slurry
  • Production method of autoclaved prestressed concrete pipe pile without excess slurry
  • Production method of autoclaved prestressed concrete pipe pile without excess slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A production method of grout-free and autoclaved prestressed concrete pipe piles includes the following 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 polycarboxylic acid water reducer 8, activator 5 ;

[0020] Step 2. Closing, clamping and stretching processing;

[0021] Step 3. Carry out low-speed, low-medium speed, medium-speed and high-speed centrifugation steps in sequence;

[0022] In the low-speed centrifugation step, the speed is 75r / min, the time is 5min, the speed of the low-medium speed centrifugation is 139r / min, the time is 1.5min, the speed of the medium-speed centrifugation is set to 245r / min, the high-speed centrifugation step, the speed is set 545r / min, time is 2min;

[0023] Step 4. Room temperature steaming, the room temperature steaming includes three stages of heating, constant temperature and cooling, respecti...

Embodiment 2

[0031] A production method of grout-free and autoclaved prestressed concrete pipe piles includes the following 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 polycarboxylic acid water reducer 13, activator 15 ;

[0033] Step 2. Closing, clamping and stretching processing;

[0034] Step 3. Carry out low-speed, low-medium speed, medium-speed and high-speed centrifugation steps in sequence;

[0035] In the low-speed centrifugation step, the speed is 70r / min, the time is 5min, the speed of the low-medium speed centrifugation is 125r / min, the time is 1.8min, the speed of the medium-speed centrifugation is set to 250r / min, the high-speed centrifugation step, the speed is set 459r / min, time is 1.9min;

[0036] Step 4. Room temperature steaming. The room temperature steaming includes three stages of heating, constant temperature and cooling, and ...

Embodiment 3

[0044] A production method of grout-free and autoclaved prestressed concrete pipe piles includes the following 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 polycarboxylic acid water reducing agent 14, activator 19 ;

[0046] Step 2. Closing, clamping and stretching processing;

[0047] Step 3. Carry out low-speed, low-medium speed, medium-speed and high-speed centrifugation steps in sequence;

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

[0049] Step 4. Room temperature steaming, the room temperature steaming includes three stages of heating, constant temperature and coolin...

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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 slurry-free and 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 process has not yet achieved the desired effect. During centrifugation, a large amount of residual slurry will be produced. The residual slurry contains water and gel components, which will affect the quality of the finished pipe pile. At the same time, the existing production process requires two processes of atmospheric steaming and high-pressure steaming, which consumes a lot of energy. In view of the above-mentioned problems, technicians have made improvements. For the former, the existing main method is to add a tackifier to the raw material, and for the latter, the only existing method is to add s...

Claims

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Application Information

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Patent Type & Authority Patents(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