High-durability prestressed high-strength concrete pipe pile

A high-strength concrete and durable technology, applied in the direction of clay preparation device, mixing operation control, mixing operation control device, etc., to achieve good anti-permeability effect

Inactive Publication Date: 2008-01-02
GUANGDONG SANHE PILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Examples

Experimental program
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Effect test

Embodiment 1

[0029] Take 380 kg of P II 42.5R Yuexiu cement, 100 kg of first-grade fly ash, 690 kg of Zhaoqing river sand, 1287 kg of granite gravel, and 128 kg of water. Naphthalenesulfonic acid formaldehyde condensation product water reducer 3.528kg, SJ-2 type water-soluble air-entraining agent 72g.

[0030] Ingredients: Stir the gravel for 20 seconds first, add part of the cementitious material, part of the admixture and part of the water and stir for 40 seconds, then add all the rest and stir for 1 minute.

[0031] Then the pipe pile is centrifugally formed, and rested for 1 hour, after steam curing and autoclaving curing, the temperature of autoclave curing is 80°C, the temperature rises for 30 minutes, the temperature is constant for 5 hours, and the temperature is lowered for 30 minutes; the pressure of autoclave curing is 1.0MPa, and the temperature is greater than 180°C , boosting the pressure for 1.5 hours, constant pressure for 5.5 hours, and reducing the pressure for 1 hour, a ...

Embodiment 2

[0035] Sulfonic acid formaldehyde condensation product water reducing agent 3.550kg, SJ-2 type water-soluble air-entraining agent 50g, other conditions are identical with embodiment 1.

[0036] The permeability of concrete is measured by coulometric method of 1000 coulombs and measured by ASTM C1202 method; the chloride ion diffusion coefficient is 3.0×10 -8 cm 2 / s, measured by NEL method; the number of times of anti-sulfate erosion reaches 35 times; the number of times of antifreeze (freeze-thaw cycles) reaches 300 times.

Embodiment 3

[0038] Sulfonic acid formaldehyde condensation product water reducing agent 3.510kg, SJ-2 type water-soluble air-entraining agent 90g, other conditions are identical with embodiment 1.

[0039] The permeability of concrete is measured by coulometric method of 1000 coulombs and measured by ASTM C1202 method; the chloride ion diffusion coefficient is 2.9×10 -8 cm 2 / s, measured by NEL method; the number of times of anti-sulfate erosion reached 37 times; the number of times of antifreeze (freeze-thaw cycles) reached 403 times.

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Abstract

The invention discloses a high-durability pre-stressed high-strength concrete pipe pile. The invention is constituted by additive constituted by cementing material, water reduction agent of naphthalene sulfonated formaldehyde condensate and triterpenoid saponin non-ion surface active air-entraining agent, sand and stone, and water by centrifugal casting, steam curing and steam pressing. Addition amount of additive is 1.0-1.2 wt% of cementing material. The high-durability pre-stressed high-strength pipe pile is provided with good permeability resistance, sulfate-corrosion resistance and frost resistance in phase.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular, the invention is a high-durability prestressed high-strength concrete pipe pile. Background technique [0002] At present, pipe piles, as a building component of pile foundation construction, face the problem of harmful ion erosion during use, such as the erosion of groundwater, the penetration of soluble particles in the soil, and so on. The erosion of groundwater and the infiltration of soluble particles shorten the life of pipe piles and may threaten building safety. [0003] The full name of PHC pipe pile is high durability prestressed high-strength concrete pipe pile, and the concrete of the pile body is C80 high-strength concrete. Its main production process is: laying concrete, applying prestress, high-speed centrifugal molding, atmospheric pressure steam curing, high temperature and high pressure steam curing after demoulding. PHC pipe piles have the characteri...

Claims

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Application Information

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IPC IPC(8): B28C7/04B28B21/30B28B11/24
CPCC04B2111/29C04B2111/2015C04B2111/56C04B28/04C04B2111/00241
Inventor 韦泽林
Owner GUANGDONG SANHE PILE CO LTD
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