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Autoclaved prestressed concrete tube pile applied to marine work environment and preparation method thereof

A concrete pipe pile and prestressing technology, applied in the field of building materials, can solve the problems of unfavorable industrialization and promotion of autoclave-free pipe piles, less research on autoclave-free pipe piles, unstable quality, etc. The effect of micro-morphology, reducing the risk of steel corrosion, and improving the corrosion resistance of chlorine salts

Inactive Publication Date: 2015-09-23
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic pipe pile enterprises have carried out trial production of autoclaved pipe piles, using silica fume and ultra-fine fly ash as mineral admixtures. Although the product strength can reach 80MPa, the quality is unstable and the cost is higher than autoclaved curing. There are few researches on autoclaved pipe piles in China, so the autoclaved pipe piles are currently not conducive to industrialization and promotion

Method used

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  • Autoclaved prestressed concrete tube pile applied to marine work environment and preparation method thereof
  • Autoclaved prestressed concrete tube pile applied to marine work environment and preparation method thereof
  • Autoclaved prestressed concrete tube pile applied to marine work environment and preparation method thereof

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Embodiment 1

[0034] In this embodiment, the amount of each raw material of concrete is: the amount of sand and stone is 700kg / m 3 and 1280kg / m 3 ;The total amount of cementitious material is 513kg / m 3 , wherein the amount of mineral admixture is 40wt% of the amount of cementitious material. Mineral admixtures are Class I fly ash, Class II fly ash and ultra-fine fly ash, the amount of which accounts for 5wt%, 25wt%, and 10wt% of the cementitious material, and the water-binder ratio is 0.22; The composite water reducer prepared by aliphatic and polycarboxylic acid at a weight ratio of 1:2 has a solid content of 28wt%, and the amount of water reducer accounts for 2.23wt% of the gelled material.

[0035]Put the raw materials into a 60L forced automatic mixer and stir for 3 minutes according to the ratio of the above-mentioned pipe pile concrete raw materials to obtain the pipe pile concrete mixture, put it into a mold, and stop for 1.5 hours, then put the mold into the steam curing pool for ...

Embodiment 2

[0039] In this embodiment, the amount of each raw material of concrete is: the amount of sand and stone is 685kg / m 3 and 1275kg / m 3 ;The total amount of cementitious material is 450kg / m 3 , wherein the amount of mineral admixture is 30wt% of the amount of cementitious material. Mineral admixtures are superfine fly ash and S95 grade slag powder, the dosage accounts for 15wt% and 15wt% of the amount of cementitious material respectively, and the water-binder ratio is 0.22; the water reducing agent is aliphatic and polycarboxylic acid according to 1: 2 The composite water-reducer prepared in the weight ratio has a solid content of 28wt%, and the amount of the water-reducer accounts for 2.1wt% of the gelling material.

[0040] Put the raw materials into a 60L forced automatic mixer and stir for 2 minutes according to the ratio of the above-mentioned pipe pile concrete raw materials to obtain the pipe pile concrete mixture, put it into a mold, and stop for 1.5 hours, then put the...

Embodiment 3

[0043] In this embodiment, the amount of each raw material of concrete is: the amount of sand and stone is 710kg / m 3 and 1320kg / m 3 ;The total amount of cementitious material is 550kg / m 3 , wherein the amount of mineral admixture is 50wt% of the amount of cementitious material. Mineral admixtures are grade I fly ash, grade II fly ash, and S95 grade slag powder, the amount of which accounts for 30wt%, 10wt%, and 10wt% of the cementitious material, and the water-binder ratio is 0.24; the water reducer is The composite water reducer prepared by aliphatic and polycarboxylic acid at a weight ratio of 1:2 has a solid content of 28wt%, and the amount of the water reducer accounts for 2.3wt% of the amount of the gelling material.

[0044] Concrete agitation forming maintenance process is the same as embodiment 1, and after the maintenance is finished, spray paint treatment, and the consumption of each layer of paint is the same as embodiment 1, primer dry film thickness 30 μ m, inte...

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Abstract

The invention discloses an autoclaved prestressed concrete tube pile applied to a marine work environment and a preparation method thereof. A coating layer is coated on the surface of a tube pile; a gel material consists of P.II52.5 silicate cement and a mineral admixture; the using amount of gel material is 450 to 550kg / m<3>; the using amount of mineral admixture is 30 to 50wt percent that of gel material; the admixture amount of I-level coal ash is 0 to 30wt percent that of gel material; the admixture amount of II-level coal ash is 0 to 25wt percent that of gel material; the admixture amount of ultra-fine coal ash is 0 to 20wt percent that of gel material; the admixture amount of S95-level mineral powder is 0 to 25wt percent that of gel material; the weight ratio of water and gel is 0.22 to 0.24; the water reducer is prepared by aliphatic series and polycarboxylic acid and the ratio is 1 to 2, the using amount of the water reducer is 2.1 to 2.3 wt percent of gel material; the coating layer consists of a primer, a middle paint and a finish paint; the thickness of the coating layer is 125 to 150 microns. The proportions of raw materials and parameters in a preparation process are optimized, and the specific coating layer is coated on the surface, so that the compressive strength and chlorine salt erosion resistance of the tube pile are greatly improved, the rusting risk of the tube pile is greatly reduced, and the service life of the tube pipe in the marine work environment can be greatly prolonged.

Description

technical field [0001] The invention relates to a concrete pipe pile, in particular to an autoclaved prestressed concrete pipe pile suitable for a marine environment and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] With the continuous expansion of my country's basic construction, more and more buildings or structures are located in the coastal or marine environment, so that the application of concrete pipe piles as a foundation component of buildings or structures in the above-mentioned environments is also increasing. many. However, the strength of traditional ordinary prestressed concrete pipe piles is low, and it is difficult to resist the ubiquitous chloride salt erosion in the offshore environment, which leads to premature durability failure of pipe piles. At present, in order to increase the strength, prestressed concrete pipe piles are prepared with mineral admixtures, but the autoclaved prestresse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B41/71
Inventor 李果姚峰夏军武颜成华
Owner CHINA UNIV OF MINING & TECH
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