Fabricating method of concrete preformed pile in saline soil region

A technology of concrete prefabricated piles and manufacturing methods, applied in the direction of manufacturing tools, reinforced molding, ceramic molding machines, etc., can solve the problems of application limitations, poor corrosion resistance, etc., and achieve the effects of reduced emissions, good durability, and low calcination temperature

Inactive Publication Date: 2013-02-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concrete and reinforced concrete pile foundations are the most commonly used foundation forms for buildings (structures), but the currentl

Method used

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  • Fabricating method of concrete preformed pile in saline soil region
  • Fabricating method of concrete preformed pile in saline soil region
  • Fabricating method of concrete preformed pile in saline soil region

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The concrete prefabricated pipe pile is made by adopting the method for making the concrete prefabricated pile of the present invention, the pile is 6m long, the outer diameter is 50cm, and the wall thickness is 10cm. The cementitious material concrete is prepared according to the raw materials in parts by weight of the following components:

[0038] Lightly burned magnesia powder: 150 parts;

[0039] Red mud tailings powder is selected as mineral admixture: 50 parts;

[0040] Coarse aggregate: 200 parts;

[0041] Fine aggregate: 200 parts;

[0042] Water: 120 parts.

[0043] Its production process is as follows:

[0044] (1) Mixing and stirring of raw materials: Mix and stir the various raw materials measured separately according to the ratio.

[0045] (2) Mixture molding: Put the carbon fiber reinforced plastic rib skeleton into the steel mold that has been assembled, and bind it in the mold, and then use the centrifugal molding method to carry out the mixture mo...

Embodiment 2

[0049] The concrete prefabricated pile is manufactured by the method for manufacturing the concrete prefabricated pile of the present invention. The length of the pile is 8m, and the section is 50cm×50cm. On the cross section of the pile, 4 through holes with a diameter of 15cm are arranged along the direction of the pile body, arranged in a square. The shortest distance between sides is 14.5cm. The cementitious material concrete is prepared according to the raw materials in parts by weight of the following components:

[0050] Lightly burned magnesia powder: 350 parts;

[0051] Quicklime: 300 parts;

[0052] The mineral admixture is selected from granulated blast furnace slag: 550 parts;

[0053] Coarse aggregate: 1500 parts;

[0054] Fine aggregate: 900 parts;

[0055] Water: 400 parts.

[0056] Its production process is as follows:

[0057] (1) Mixing and stirring of raw materials: Mix and stir the various raw materials measured separately according to the ratio.

...

Embodiment 3

[0062] Adopt concrete prefabricated pile manufacturing method of the present invention to make reinforced concrete prefabricated pile, pile is long 10m, and pile section adopts such as figure 2 The cross-section shown. The cementitious material concrete is prepared according to the raw materials in parts by weight of the following components:

[0063] Lightly burned magnesia powder: 200 parts;

[0064] Quicklime: 100 parts;

[0065] Silica fume is selected as mineral admixture: 100 parts, steel slag: 50 parts;

[0066] Coarse aggregate: 1000 parts;

[0067] Fine aggregate: 100 parts;

[0068] Fiberglass: 1 part;

[0069] Water: 190 parts.

[0070] Its production process is as follows:

[0071] (1) Mixing and stirring of raw materials: Mix and stir the various raw materials measured separately according to the ratio.

[0072] (2) Mixture molding: Put the bamboo reinforcement skeleton into the steel mold that has been assembled, and then pour in the evenly stirred concre...

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Abstract

The invention discloses a fabricating method of a concrete preformed pile in a saline soil region and belongs to the field of civil engineering. The fabricating method comprises the following steps of: mixing light calcined magnesia powder or a mixture of light calcined magnesia powder and calcined lime with mineral admixtures such as granulated blast-furnace slag, pulverized fuel ash, silica fume and steel slag according to a certain proportion and taking the mixture as a cementing material, mixing the cementing material, thick and thin aggregates such as sand stones, and water, taking the mixture as a base material for producing the preformed pile, and finally hardening the base material under a CO2 environment after processes of stirring, forming, pre-curing and the like. As the final products of the cementing material after being subjected to hydration and carburization are magnesium carbonate and calcium carbonate which are not corroded by salinity in the saline soil, the cementing material has enough durability. The corrosion-resistant concrete preformed pile is suitable for the saline soil having a salt content not higher than 44% (mass percentage content).

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to pile foundation engineering technology in building foundations, in particular to a manufacturing process of concrete prefabricated piles used in saline soil areas. Background technique [0002] The saline soil in the salt lake area in western my country and the coastal area in the east contains a lot of salt, mainly chloride, sulfate and carbonate of potassium, sodium, magnesium and calcium. Corrosion of concrete and steel bars is relatively serious, which poses a serious threat to the durability of concrete and reinforced concrete structures made of existing Portland-based cements. Concrete and reinforced concrete pile foundations are the most commonly used foundation forms of buildings (structures). However, due to their poor corrosion resistance, the currently used concrete piles and reinforced concrete piles are greatly limited in application in saline soil areas. Therefore, it...

Claims

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Application Information

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IPC IPC(8): B28B21/30B28B21/56B28B11/24C04B28/32
Inventor 李昆于浩王冉黄新
Owner BEIHANG UNIV
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