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Pre-tensioning method prestress concrete anticorrosion pipe pile as well as manufacture method and application thereof

A kind of prestressing and concrete technology, applied in the direction of reinforcement molding, etc., can solve the problems affecting the durability of reinforced concrete, the limited supply of sulfate-resistant cement, and the inability to obtain anti-corrosion effects, etc., to achieve alkaline protection, reduce microscopic defects, Improvement of penetration resistance and corrosion resistance

Active Publication Date: 2012-10-10
建华建材(莱阳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the traditional method is to use sulfate-resistant cement or add a certain amount of mineral admixtures to the concrete. However, the supply of sulfate-resistant cement is limited and the price is expensive. What is more important is that sulfate-resistant cement can prevent corrosion of steel bars caused by chloride salts. Poor capacity, which seriously affects the durability of reinforced concrete structures in eroded areas
The method of adding mineral admixtures can improve the hydration and compactness of cement and reduce salt corrosion stress. The above two methods are only suitable for moderate corrosion conditions, but when the corrosion environment is strong corrosion, only this method The method does not achieve a good anti-corrosion effect

Method used

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  • Pre-tensioning method prestress concrete anticorrosion pipe pile as well as manufacture method and application thereof
  • Pre-tensioning method prestress concrete anticorrosion pipe pile as well as manufacture method and application thereof
  • Pre-tensioning method prestress concrete anticorrosion pipe pile as well as manufacture method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Pretensioned prestressed concrete anti-corrosion pipe pile, its raw materials and proportions are as follows:

[0035]

[0036] Among them, the combination of cement, finely ground sand and mineral powder is the cementitious material. And add 3.2kg of water reducer and 8kg of preservative, add 116kg of water. The cement is P.I52.5 cement with a specific surface area of ​​3500cm 2 / g, the mass percentage of tricalcium aluminate is 5.5%, and the 28-day mortar strength is greater than or equal to 57MPa. The mineral powder is S95 grade mineral powder, the 28-day activity index is greater than or equal to 95%, and the specific surface area is 4000cm 2 / g. The sand is medium-coarse sand with a fineness modulus of 2.8 to 3.2. The stones are continuously graded from 5 to 20mm, and the crushing index value is not more than 8%. The water reducing agent is a high-efficiency water reducing agent with a water reducing rate of 25%. The preservative is selected from the MS-60...

Embodiment 2

[0044] Pretensioned prestressed concrete anti-corrosion pipe pile, its raw materials and proportions are as follows:

[0045]

[0046] Among them, the combination of cement, finely ground sand and mineral powder is the cementitious material. Add 4kg of water reducer and 20kg of preservative, and add 150kg of water. The cement is P.I52.5 cement with a specific surface area of ​​3600cm 2 / g, the mass percentage of tricalcium aluminate is 5.5%, and the 28-day mortar strength is greater than or equal to 57MPa. The mineral powder is S95 grade mineral powder, the 28-day activity index is greater than or equal to 95%, and the specific surface area is 4300cm 2 / g. The sand is medium-coarse sand with a fineness modulus of 2.8 to 3.2. The stones are continuously graded from 5 to 20mm, and the crushing index value is not more than 8%. The water reducing agent is a high-efficiency water reducing agent with a water reducing rate of 28%. The preservative is selected from the MS-605...

Embodiment 3

[0054] Pretensioned prestressed concrete anti-corrosion pipe pile, its raw materials and proportions are as follows:

[0055]

[0056] Among them, the combination of cement, finely ground sand and mineral powder is the cementitious material. And add 3.7kg of water reducer and 15kg of preservatives, and add 133kg of water. The cement is P.I52.5 cement with a specific surface area of ​​3800cm 2 / g, the mass percentage of tricalcium aluminate is 5%, and the 28-day mortar strength is greater than or equal to 57MPa. The mineral powder is S95 grade mineral powder, the 28-day activity index is greater than or equal to 95%, and the specific surface area is 4500cm 2 / g. The sand is medium-coarse sand with a fineness modulus of 2.8 to 3.2. The stones are continuously graded from 5 to 20mm, and the crushing index value is not more than 8%. The water reducing agent is a high-efficiency water reducing agent, and the water reducing rate is 20%. The preservative is selected from the...

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Abstract

The invention discloses a pre-tensioning method prestress concrete anticorrosion pipe pile as well as a manufacture method and an application thereof. The pre-tensioning method prestress concrete anticorrosion pipe pile comprises the following raw materials in parts by weight: 265-315 parts by weight of cement, 105-135 parts by weight of levigated sand, 30-68 parts by weight of mineral powder, 600-700 parts by weight of sand and 1200-1300 parts by weight of stone, wherein the cement, the levigated sand and the mineral powder are combined into gelling material, the mass ratio of water and the gelling material is 29:100, and water reducing agent accounting for 0.8wt% of the gelling material and preservative accounting for 2-wt% of the gelling material are added. The pipe pile disclosed by the invention has a good anticorrosion performance, and can be applied to the strong-corrosion environment.

Description

technical field [0001] The invention relates to the technical field of concrete pipe piles, in particular to a pretensioned prestressed concrete anti-corrosion pipe pile and its manufacturing method and application. Background technique [0002] At present, pretensioned prestressed concrete pipe piles have been basically popularized in the whole country, and the recognition of pipe piles in the construction industry has gradually increased. The project also has certain requirements for anti-corrosion. According to estimates by foreign experts, the economic loss caused by the corrosion of concrete and steel bars accounts for about 1.25% of national income. These economic losses include not only the cost of materials and project costs for repairing and rebuilding buildings, but also the loss of output due to the failure of the building structure to meet the production requirements, or the interruption of normal production caused during the repair period, according to Article...

Claims

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Application Information

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IPC IPC(8): C04B28/04B28B21/68C04B111/23
Inventor 李明辰
Owner 建华建材(莱阳)有限公司
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