Non-autoclaved prestressed high-strength centrifuge pipe pile and preparation method thereof

A prestressed, centrifugal tube technology, used in sheet pile walls, reinforcement molding, construction, etc., to protect the environment, reduce energy consumption and one-time investment, and improve vertical bearing capacity.

Active Publication Date: 2014-04-16
GUANGDONG SANHE PILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Relevant studies have shown that the durability of the concrete produced by the secondary curing process is not as good as that of the concrete cured at atmospheric pressure

Method used

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  • Non-autoclaved prestressed high-strength centrifuge pipe pile and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of pressure-free steamed prestressed high-strength centrifugal piles:

[0023] A. Put 445Kg / m 3 Cement, 70Kg / m 3 Microbeads, 35Kg / m 3 Silica fume, 720Kg / m 3 Sand, 1191Kg / m 3 Gravel, 1.9Kg / m 3 Water reducer, 104.5kg / m 3 Water, wherein the water-binder ratio is 0.19 mixed to make concrete;

[0024] B. After the above-mentioned concrete is distributed in the steel mold, and the mold is clamped and stretched, it is centrifugally formed on a centrifuge to make a prestressed concrete two-pipe pile. The centrifugal forming process is divided into four types: low speed, medium speed, medium high speed, and high speed. stage;

[0025] C. The prestressed concrete pipe pile after centrifugal forming should be cured by atmospheric pressure steam or water once, and the constant temperature should be controlled at 75°C-95°C; then it should be parked naturally for 7 days, and the concrete strength is 118.0MPa.

Embodiment 2

[0027] Preparation of pressure-free steamed prestressed high-strength centrifugal piles:

[0028] A. Put 460Kg / m 3 Portland cement with strength grade 42.5, 100Kg / m 3 Microbeads, 40Kg / m 3 Silica fume, 700kg / m 3 Sand, 1144Kg / m 3 Gravel, 2.1kg / m 3 Polycarboxylate superplasticizer, 102kg / m 3 Water, wherein the water-binder ratio is 0.17 mixed to make concrete;

[0029] B. Use the above-mentioned concrete in the steel mold for distribution, clamping and tensioning, and then centrifugally form it on a centrifuge to make prestressed concrete piles. The centrifugal forming process is divided into four types: low speed, medium speed, medium high speed, and high speed. stage,

[0030] C. The prestressed concrete pipe pile after centrifugal forming should be cured by atmospheric pressure steam or water once, and the constant temperature should be controlled at 75°C-95°C; then it should be parked naturally for 7 days, and the concrete strength is 118.8MPa.

Embodiment 3

[0032] Preparation of non-pressure steamed prestressed square high-strength centrifugal piles:

[0033] A. Put 520Kg / m 3 Cement, 65Kg / m 2 Microbeads, 65Kg / m 3 Silica fume, 640Kg / m 3 Sand, 1139kg / m 3 Gravel, 2.25kg / m 3 Water reducer, 117Kg / m 3 Water, wherein the water-binder ratio is 0.18 mixed to make concrete;

[0034] B, adopt above-mentioned concrete in steel formwork cloth, after clamping the mold and stretching, centrifugal forming on the centrifuge makes the prestressed concrete pipe pile, divides low speed, medium speed, medium high speed, high speed four stages in the described centrifugal forming process;

[0035] C. The prestressed concrete pipe pile after centrifugal forming should be cured by atmospheric pressure steam or water once, and the constant temperature should be controlled at 75°C-95°C; then it should be parked naturally for 7 days, and the concrete strength is 120.0MPa.

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Abstract

The invention discloses a non-autoclaved prestressed high-strength centrifuge pipe pile and a preparation method thereof. The concrete used by the pipe pile comprises the following components in parts by weight: 550-650 parts of cement, 1761-1905 parts of sand and gravel, 1.65-2.6 parts of water reducing agent and 93.5-136.5 parts of water. The cement comprises the following components in percentage by weight: 70-90% of cement, 5-20% of microbead and 5-10% of silica fume. The method for preparing the pipe pile comprises the following steps:: A. proportionally adding water, sand, gravel and water reducing agent into cement to prepare concrete; B. distributing the concrete in a steel mold, closing the mold, stretching, and centrifugally forming a prestressed concrete pipe pile on a centrifugal machine, wherein the centrifugal forming technique comprises four stages, including low speed, medium speed, medium high speed and high speed; and C. carrying out primary atmospheric steam curing or water curing on the centrifugally formed prestressed concrete pipe pile while controlling the constant temperature at 75-95 DEG C, and naturally standing for 7 days. The strength level of the concrete satisfies C105 strength requirements.

Description

technical field [0001] The invention relates to a pressure-free steamed prestressed high-strength centrifugal pipe pile, and also relates to a method for preparing the centrifugal pipe pile. Background technique [0002] Prestressed high-strength concrete pipe piles (PHC pipe piles) are one of the most commonly used building foundation components in infrastructure construction at this stage. They have high bearing capacity, fast and convenient construction, low environmental pollution, reliable pile quality, and comprehensive technical and economic benefits. Good and other characteristics, it has been widely used in coastal provinces and cities across the country. In the production process, cement, mineral admixtures and sand are usually mixed and stirred, and then produced through a centrifugal process and a secondary curing process combining atmospheric pressure steam curing and high pressure steam curing. In the production of PHC pipe piles, the size of the pipe pile mol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00E02D5/58E02D5/30B28B21/68
Inventor 韦泽林何友林李龙梁槟星魏宜龄
Owner GUANGDONG SANHE PILE CO LTD
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