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High-strength burning-free slag ceramsite and preparation method thereof

A high-strength, ceramsite technology, applied in the field of steel slag high-strength non-fired ceramsite and its preparation, can solve the problems of inferior slag micropowder in activity, poor grindability, and difficulty in dissolving free calcium.

Inactive Publication Date: 2017-12-19
XIHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Steel slag is the main solid waste discharged from steelmaking, and has a certain potential hydration activity. However, because its activity is not as good as slag powder, and there are problems such as poor grindability and difficulty in dissolving free calcium, it is mostly mixed with slag powder to prepare steel. Slag powder is used together, there is no report of being used as unfired ceramsite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of steel slag high-strength unfired ceramsite, which is prepared from the following raw materials in weight percentage: 60% of ultra-fine steel slag powder with a particle size of 30 μm, 20% of ordinary portland cement, 10% of quicklime, 4% of quicklime, and 4% of Glauber's salt % and water glass 2%.

[0022] The preparation method comprises the steps of:

[0023] 1) The raw materials are configured according to the proportions mentioned above and mixed evenly by a mixer;

[0024] 2) Using a granulator, add 10% water, and process it into granules with a diameter of 15mm;

[0025] 3) The ceramsite was cured for 14 days under natural conditions, the conditions being a temperature of 10°C and an air humidity of 45%, to obtain the final product.

Embodiment 2

[0027] A high-strength steel slag unfired ceramsite, prepared from the following raw materials in weight percentage: 65% of ultra-fine steel slag powder with a particle size of 20 μm, 15% of 42.5R Portland cement, 12% of quicklime, 3% of quicklime, and 3% of Glauber's salt % and water glass 2%.

[0028] The preparation method comprises the steps of:

[0029] 1) Mix the prepared raw materials evenly through a mixer;

[0030] 2) adopt granulator, add 12% moisture, process into the granule of diameter 10mm;

[0031] 3) Curing in the ceramsite curing room for 21 days under the conditions of temperature 45°C and air humidity 81%.

Embodiment 3

[0033] A high-strength unfired ceramsite of steel slag, which is prepared from the following raw materials in weight percentage: 70% of ultra-fine steel slag powder with a particle size of 20 μm, 10% of ordinary Portland cement, 10% of quicklime, 4% of quicklime, and 3% of Glauber's salt % and water glass 3%.

[0034] The preparation method comprises the steps of:

[0035] 1) Mix the prepared raw materials evenly through a mixer;

[0036] 2) adopt granulator, add 15% moisture, process into the granule of diameter 5mm;

[0037] 3) The ceramsite was naturally cured for 28 days under the conditions of temperature 10°C and air humidity 43% to obtain the final product.

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Abstract

The invention relates to the technical field of building materials, particularly to a high-strength burning-free slag ceramsite and a preparation method thereof, wherein the high-strength burning-free slag ceramsite is prepared from 60-70% of ultra-fine slag micro-powder, 10-20% of cement, 10-15% of quick lime, 0-4% of gypsum, 0-4% of Glauber's salt, and 0-3% of water glass. According to the present invention, the ultra-fine slag micro-powder is used as the main raw material, the bulk density of the prepared high-strength burning-free slag ceramsite is 800-900 kg / m<3>, the numerical tube pressure of the prepared high-strength burning-free slag ceramsite is more than 7.0 MPa, and the prepared of the prepared high-strength burning-free slag ceramsite meets the high-strength light coarse aggregate requirements of GB / T 17431.1 Lightweight Aggregates and Its Test Methods.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength unfired ceramsite with steel slag and a preparation method thereof. Background technique [0002] High-strength ceramsite refers to light and coarse aggregates for structures with a strength rating of not less than 25MPa and a cylinder compressive strength of 4.0MPa or more. The concrete prepared with it has excellent properties such as light weight, high strength, thermal insulation, etc., so it is widely used in high-rise buildings, bridges and long-span concrete structure projects. [0003] Non-fired ceramsite refers to ceramsite prepared without sintering, but using various cementing materials and waste residue activators, adopting reasonable formula and maintenance process. Compared with sintered ceramsite, unfired ceramsite has the advantages of sustainable growth in strength and good acid and alkali corrosion resistance. At the same time, the pr...

Claims

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Application Information

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IPC IPC(8): C04B18/02
CPCC04B18/027C04B18/021C04B18/142C04B7/02C04B2/02C04B22/143C04B22/147C04B22/08
Inventor 敖进清张云郭彪邵丰年夏正芝曾申龙蒋睿
Owner XIHUA UNIV
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