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Admixture for PHC pipe pile and method for preparing PHC pipe pile

A technology of PHC pipe piles and admixtures, which is applied in the field of building materials, can solve the problems that the load-bearing foundation piles cannot meet the design requirements, the mechanical strength of PHC pipe piles is insufficient, and the pile head damage rate increases, etc., and achieve good social effects and economic performance , save steam and labor costs, and reduce production costs

Inactive Publication Date: 2019-08-06
山东盈润智能新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the insufficient mechanical strength of the PHC pipe pile, it cannot meet the design requirements as a load-bearing foundation pile, especially in large-scale use of PHC pipe piles (such as piles with a pile length of more than 60 meters) as a load-bearing foundation pile. During construction, during the pile sinking process using PHC pipe piles, some pile head damage and broken piles often occur after hammering by the pile driver, which reduces the placement rate of pile sinking and increases the damage rate of pile heads, making it difficult Meet the requirements of construction design

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An admixture for PHC pipe piles, comprising the following raw materials in percentage by weight: 10% activated fly ash, 5% silica fume, 8% zeolite powder, 10% calcined dihydrate gypsum, 0.2% lithium carbonate, and the balance is ore pink;

[0024] The preparation method of activated fly ash is as follows: take fly ash, which is formed at a furnace temperature of 800°C, and screen fly ash particles with a particle size of 0.1 μm; mix the fly ash particles with hydrogen Calcium oxide is mixed according to the mass ratio of 100:1; the fineness of silica fume is 10000 mesh; the fineness of zeolite powder is 800 mesh; the fineness of calcined dihydrate gypsum is 100 mesh; the preparation method of the calcined dihydrate gypsum is: Water gypsum is calcined to 500°C, and then ground to 100 mesh; ore powder is a by-product of large steel mills, and the specific surface area of ​​ore powder is 900㎡ / kg.

[0025] A method for preparing PHC pipe piles with admixtures for PHC pipe ...

Embodiment 2

[0027] An admixture for PHC pipe piles, comprising the following raw materials in percentage by weight: activated fly ash 17%, silica fume 1%, zeolite powder 14%, calcined dihydrate gypsum 4%, lithium carbonate 0.7%, and the balance is ore pink;

[0028] The preparation method of activated fly ash is as follows: take fly ash, which is formed at a furnace temperature of 1000° C., and screen fly ash particles with a particle size of 0.5 μm; mix the fly ash particles with hydrogen Calcium oxide is mixed according to the mass ratio of 100:5; the fineness of silica fume is 30000 mesh; the fineness of zeolite powder is 1500 mesh; the fineness of calcined dihydrate gypsum is 350 mesh; Water gypsum is calcined to 1000°C and then ground to 350 mesh; the specific surface area of ​​mineral powder is 1500㎡ / kg.

[0029] A method for preparing PHC pipe piles with admixtures for PHC pipe piles, the steps are: according to the above formula, take activated fly ash, silica fume, zeolite powde...

Embodiment 3

[0031] An admixture for PHC pipe piles, comprising the following raw materials in percentage by weight: 15% activated fly ash, 3% silica fume, 10% zeolite powder, 7% calcined dihydrate gypsum, 0.5% lithium carbonate, and the balance is ore pink.

[0032] The preparation method of the calcined dihydrate gypsum is as follows: calcining the dihydrate gypsum to 800° C., and then grinding to 200 mesh. The fly ash is a fly ash formed at a furnace temperature of 900°C. The preparation method of the activated fly ash is as follows: take the fly ash, screen the fly ash particles with a particle size of 0.3 μm; mix the fly ash particles and calcium hydroxide according to the mass ratio of 100:3. The fineness of the silica fume is 20000 mesh, and the calcium content in the silica fume accounts for 99%; the fineness of the zeolite powder is 1200 mesh; the specific surface area of ​​the mineral powder is 1200㎡ / kg.

[0033] A method for preparing PHC pipe piles with admixtures for PHC pip...

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Abstract

The invention relates to the technical field of building materials, and in particular discloses an admixture for a PHC pipe pile and a method for preparing the PHC pipe pile. The admixture for the PHCpipe pile comprises the following raw materials in percentage by weight: 10-17% of activated fly ash, 1-5% of silica fume, 8-14% of zeolite powder, 4-10% of calcined dihydrate gypsum, 0.2-0.7% of lithium carbonate and the balance of mineral powder; the raw materials are easy to obtain, and replace 25-30% of cement in a traditional admixture for the PHC pipe pile, the product has continuous and uniform particle size distribution, can effectively improve the compactness and strength of the PHC pipe pile, can greatly improve the mechanical property and long-term durability of the PHC pipe pile,greatly improves the impermeability and corrosion resistance of the PHC pipe pile, and can effectively improve the early strength. Besides, conventional steam curing and high pressure steam curing processes are directly exempted, production requirements of C80 pipe pile concrete can be met only by solar greenhouse curing, the admixture greatly saves steam and labor costs, and is conducive to reducing the production cost of the PHC pipe pile.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an admixture for PHC pipe piles and a method for preparing PHC pipe piles. Background technique [0002] At present, PHC pipe piles (that is, prestressed high-strength concrete pipe piles) can be used instead of steel pipe piles or steel pipe concrete piles as bearing foundation piles to reduce construction costs. PHC pipe piles are widely used in large foundations such as high-rise buildings, bridges, and venues. [0003] However, due to the insufficient mechanical strength of the PHC pipe pile, it cannot meet the design requirements as a load-bearing foundation pile, especially in large-scale use of PHC pipe piles (such as piles with a pile length of more than 60 meters) as a load-bearing foundation pile. During construction, during the pile sinking process using PHC pipe piles, some pile head damage and broken piles often occur after hammering by the pile driver, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B111/20C04B111/27
CPCC04B28/14C04B2111/27C04B2111/20C04B2201/52
Inventor 刘臻
Owner 山东盈润智能新材料有限公司