Method for producing PHC (prestressed high-strength concrete) pipe piles by using different grades of stone

A PHC pipe pile and production method technology, applied in the field of construction concrete, can solve problems such as inability to apply, increase production costs, etc., and achieve the effects of alleviating the tight supply situation of stones, avoiding waste, and high compressive strength

Inactive Publication Date: 2017-12-01
汕头市宏基混凝土构件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In fact, after quarry mining and processing, the proportion of stones of various specifications is about 15% of 0-5 stones, 45% of 1-2 stones, and 40% of 1-3 stones. According to the reinforcement structure characteristics of PHC pipe pile products and the performance requirements of concrete At present, only 1-2 stones are used in the production of pipe piles in the industry, so a large number of 0-5 stones and 1-3 stones cannot be used in PHC pipe piles, resulting in increased production costs during the stone crushing and screening process

Method used

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  • Method for producing PHC (prestressed high-strength concrete) pipe piles by using different grades of stone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Calculated per cubic concrete, take 294kg of cement, and the specific surface area is greater than 420m 2 126kg / kg of silica sand powder, 620kg of natural sand with a fineness modulus of 2.8~3.2, 119kg of 0-5 stones, of which 1203kg of 1-2 stones, 2.31kg of HQ superplasticizer (powder), 118kg of water, according to the specification PHC 400 AB 95-10 pipe piles are used to mix the concrete mixture, and then the concrete mixture is distributed into the steel mold of the pipe pile, and the prestressed steel bars are stretched at a low speed of 65r / min for 2.5 minutes, and the low-medium Speed ​​160r / min, time 1.0min, medium-high speed 270r / min, time 3.0min, high speed 420r / min, time 5.0min. The autoclave is subjected to autoclave curing, and after the curing is finished, it is hoisted to the storage yard, which is the whole use process of the present invention.

Embodiment 2

[0035] Calculated per cubic concrete, take 294kg of cement, and the specific surface area is greater than 420m 2 126kg / kg of silica sand powder, 620kg of machine-made sand with a fineness modulus of 2.8~3.2, 119kg of 0-5 stones, of which 1203kg of 1-2 stones, 2.31kg of HQ superplasticizer (powder), 118kg of water, according to the specification PHC 500 AB 125-12 pipe piles are used to mix the concrete mixture, and then the concrete mixture is distributed into the pipe pile steel mold, and the prestressed steel bars are stretched at a low speed of 60r / min, and the time is 3.0min. Speed ​​150r / min, time 1.0min, medium-high speed 250r / min, time 3.0min, high speed 380r / min, time 6.0min. The autoclave is subjected to autoclave curing, and after the curing is finished, it is hoisted to the storage yard, which is the whole use process of the present invention.

Embodiment 3

[0037] For each cubic concrete, take 280kg of cement, and the specific surface area is greater than 420m 2120kg / kg of silica sand powder, 670kg of natural sand with a fineness modulus of 2.8~3.2, 779kg of 1-3 stones, 519kg of 1-2 stones, 2.20kg of HQ superplasticizer (powder), 112kg of water, according to the specification PHC 400 AB 95-11 Pipe piles are used to mix the concrete mixture, and then the concrete mixture is distributed into the pipe pile steel mold, and the prestressed steel bars are stretched at a low speed of 65r / min for 2.5 minutes. Speed ​​160r / min, time 1.0min, medium-high speed 270r / min, time 3.0min, high speed 420r / min, time 5.0min. The autoclave is subjected to autoclave curing, and after the curing is finished, it is hoisted to the storage yard, which is the whole use process of the present invention.

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Abstract

The invention relates to the field of building concrete, in particular to a method for producing and manufacturing PHC pipe piles by using different grades of stone as raw materials. The method provided by the invention aims at optimizing the stone grades and comprehensively utilizing different grades of stone resources as raw materials for producing the PHC pipe piles. The method has the following effects that 1, in nowadays with reduced stone quality, spare resources and insufficient supply, the supply conflict can be relieved to a certain degree by exploring whether to reasonably match and use 0-5 stone and 1-3 stone in the PHC pipe pile production and comprehensively utilizing resources; 2, the production cost of the PHC pipe piles can be reduced through reasonably matching and using 0-5 stone and 1-3 stones and optimizing the concrete matching ratio; 3, the stone piling density and the particle grade are more reasonable by using different grades of stone and reasonably matching the use of the proportional 0-5 stone or 1-3 stone; the obtained concrete can ensure good workability of the mixture; the production process requirements can be met.

Description

technical field [0001] The invention relates to the field of building concrete, and more specifically relates to a method for producing PHC pipe piles by using different graded stones as raw materials. Background technique [0002] Pretensioned prestressed high-strength concrete pipe piles (hereinafter referred to as PHC pipe piles) are cement concrete products produced by centrifugal molding technology, and are widely used in building foundation projects. The concrete strength grade is C80. The quality of the stones used in the raw materials of PHC pipe piles must meet the requirements in the technical regulations of JC / T2126.6-2012 "Pretensioned Prestressed Concrete Pipe Pile", and the strength of the stone base material is not less than 120MPa. [0003] In fact, after quarry mining and processing, the proportion of stones of various specifications is about 15% of 0-5 stones, 45% of 1-2 stones, and 40% of 1-3 stones. According to the reinforcement structure characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02E04H12/12C04B111/56
CPCC04B28/02C04B2111/56C04B2201/50E04H12/12C04B14/06C04B14/02C04B20/0076C04B2103/302
Inventor 许建钊杜星宇陈黎明苏伟锐
Owner 汕头市宏基混凝土构件有限公司
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