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Technological process for producing pipe pile by using fine-ground metallurgical slag and fine-ground high silicon sand multiple infiltration method

A process technology, metallurgical slag technology, applied in the production field of concrete products, to achieve the effect of improving early strength and later strength, saving resources, and good gelling performance

Inactive Publication Date: 2005-01-26
FUJIAN DADI CONCRETE PILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ground steel slag, ground slag, etc. have been used as admixtures for pipe pile concrete alone or as admixtures for cement production. It has also been used to produce pretensioned high-strength concrete pipe piles by mixing finely ground high-silica sand, but the finely ground Metallurgical slag mixed with finely ground high-silica sand and replace cement in a certain proportion to produce pipe piles has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1. AB type prestressed high-strength concrete pipe piles with an outer diameter of 400 mm and a wall thickness of 90 mm were produced. The specific surface area is 420m 2 / kg of slag (or steel slag) and a specific surface area of ​​415m 2 / kg of high-silica sand in a ratio of 2:3 to replace 50% of high-grade Portland cement or ordinary Portland cement above grade 42.5. Mix the admixture with cement, sand, gravel, concrete superplasticizer, water, etc. in a forced concrete mixer for 120 seconds, and then feed the mixture into the pipe pile steel that has been cleaned and prestressed steel bars have been placed In the lower half of the mold, close the upper half of the pipe pile steel mold and then stretch the prestressed steel bars. The steel mold is placed on a centrifuge for centrifugation. After the centrifugation, it is cured by steam at 85°C for 7 hours. ; The demoulding strength of the concrete after atmospheric steam curing is 54MPa; then prestress re...

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Abstract

The present invention is aimed at providing a technological process for producing pipe pile by adopting fine-ground metallurgical slag and fine-ground high-silicon sand reblending method. When said invented technique is used to produce pipe pile, the fine-ground metallurgical slag and fine-ground high-silicon sand can be mixed according to a certain proportion, and said mixture can be substituted for 30%-60% of high-grade Portland cement or general Portlant cement with above 42.5-level to produce pipe ile. Said method not only can utilize furnace slag, but also reduce addition quantity of cement, and raise early-strength and after-strength of pipe pile concrete.

Description

technical field [0001] The invention relates to a production technical method of concrete products. Background technique [0002] In the prior art, the cementitious material used in the production of pre-tensioned prestressed concrete pipe piles (referred to as pipe piles) is high-grade Portland cement or ordinary Portland cement above grade 42.5. In the invention patent 95116762.6, the "mixed "Technology for producing pretensioned prestressed high-strength concrete pipe piles with finely ground construction sand". Pretensioned prestressed concrete pipe piles include prestressed concrete pipe piles (ie PC piles, the design strength of concrete is C60 grade), prestressed high-strength concrete pipe piles (ie PHC piles, the design strength of concrete is C80 grade), prestressed concrete piles Thin-walled pipe piles (that is, PTC piles, the design strength of concrete is C60 grade). Ground steel slag, ground slag, etc. are collectively referred to as ground metallurgical slag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B21/60B28B23/08B28B23/10
Inventor 蒋元海
Owner FUJIAN DADI CONCRETE PILE