Ore powder, preparation method of the ore powder and autoclave curing-free prestressed high-intensity concrete (PHC) production method

A technology of mineral powder and pipe piles, which is applied in the field of energy-saving, environment-friendly and pressure-free production of PHC pipe piles, the production of PHC pipe piles, ultrafine particle mineral powder and the preparation of ultrafine particle mineral powder, which can solve the problem that the activity index is not clear. Improvement and other issues, to achieve the effect of easy realization and control, reduction of emissions, and improvement of intensity

Inactive Publication Date: 2012-09-12
昆山德固新型建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent "vertical mill slag powder and its production process" (application number 02136907.0) discloses a mineral powder and a preparation method, and the specific surface area of ​​the mineral powder prepared by the method is 400-500m 2 / kg, and there was no clear increase in the activity index
At present, there is no method that can produce PHC pipe piles without using high-pressure steam curing on the premise of ensuring the quality of PHC pipe piles.

Method used

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  • Ore powder, preparation method of the ore powder and autoclave curing-free prestressed high-intensity concrete (PHC) production method
  • Ore powder, preparation method of the ore powder and autoclave curing-free prestressed high-intensity concrete (PHC) production method
  • Ore powder, preparation method of the ore powder and autoclave curing-free prestressed high-intensity concrete (PHC) production method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] On the basis of the mineral powder S prepared in the foregoing specific embodiment, that is, after step A is completed, the mixing is carried out according to the ratio of Table 3, and the ratio in the table is the mass percentage. Among them, the unit of mass is KG, and the following is the same, so it will not be repeated.

[0101]

[0102] table 3

[0103] After mixing, the concrete material is distributed and closed in a steel mold equipped with a steel cage, and the pipe pile is pre-stressed. After high-speed centrifugal molding, the slurry is discharged and cured by normal pressure steam at 75-85°C for 6-8 hours. , Once the production is completed, the product can be directly put into the finished product yard.

[0104] Table 4 is the test result of the PHC pipe pile made in Example 1.

[0105]

[0106] Table 4

Embodiment 2

[0108] On the basis of the mineral powder S prepared in the foregoing specific embodiment, that is, after step A is completed, the mixing is carried out according to the ratio of Table 5.

[0109]

[0110] table 5

[0111] The mixed concrete material is distributed and closed in a steel mold equipped with a steel cage, and the pipe pile is prestressed. After high-speed centrifugal molding, the slurry is discharged and cured by normal pressure steam at 75-85°C for 6-8 hours. After the pipe pile reaches the required technical parameters, it is demoulded and the product can be directly put into the finished product yard.

[0112] Table 6 shows the test results of the PHC pipe pile made in Example 2.

[0113]

[0114] Table 6

Embodiment 3

[0116] On the basis of the mineral powder S prepared in the foregoing specific embodiment, that is, after step A is completed, the mixing is carried out according to the ratio of Table 7.

[0117]

[0118] Table 7

[0119] The mixed concrete material is distributed and closed in a steel mold equipped with a steel cage, and the pipe pile is prestressed. After high-speed centrifugal molding, the slurry is discharged and cured by normal pressure steam at 75-85°C for 6-8 hours. After the pipe pile reaches the required technical parameters, it is demoulded and the product can be directly put into the finished product yard.

[0120] Table 8 shows the test results of the PHC pipe pile made in Example 3.

[0121]

[0122] Table 8

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Abstract

The invention discloses ore powder, a preparation method of the ore powder and an autoclave curing-free prestressed high-intensity concrete (PHC) production method. The ore powder has performances of above level S115. The preparation method of the ore powder mainly comprises raw material transportation, grading, grinding and recirculation. The autoclave curing-free PHC production method mainly comprises two main steps of preparing PHC raw material ore powder and preparing a PHC from the PHC raw material ore powder. Composed with the common fine slag powder, the ore powder has higher fineness and can greatly improve the strength, workability and durability of concrete. The preparation method of the ore powder provides a high-performance ore powder, is convenient for implementation, management and control and has a large economic benefit. The autoclave curing-free PHC production method can improve PHC quality, greatly reduce cracks, reduce brittleness, improve durability, reduce a cost and improve benefits.

Description

Technical field [0001] The invention relates to a method for preparing mineral powder and mineral powder used as a concrete mineral admixture and a method for producing PHC pipe piles. Specifically, it relates to an ultrafine particle mineral powder and a method for preparing ultrafine particle mineral powder. A method and a method for producing PHC pipe piles with energy-saving, environmental protection and pressure-free steaming belong to the field of building materials. Background technique [0002] Slag powder (namely slag powder, the same below), as a mineral admixture, has been maturely used in the construction fields of ready-mixed commercial concrete, marine concrete and prefabricated components. However, with the development of economy, S95 mineral powder on the market And S105 mineral powder can no longer meet the needs of the construction market. A large number of studies have shown that the particle size distribution of S95 and S105 mineral powder is mainly in the ran...

Claims

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Application Information

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IPC IPC(8): C04B18/12C04B28/04B28B21/30
CPCY02W30/91
Inventor 胡有来单爱珍
Owner 昆山德固新型建材科技有限公司
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