Method for preparing concrete by using basalt micropowder-slag micropowder-limestone powder as blending material

A technology of slag powder and limestone powder, which is applied in the field of building materials to achieve the effects of resource saving, simple preparation technology and good durability

Inactive Publication Date: 2012-09-19
南宁兴典混凝土有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, there are no relevant research reports on the preparation of concrete admixtures with basalt fine powder, slag fine powder and limestone powder for high-performance concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) The mass percentages of cementitious materials, aggregates and mixing water are 19.5%, 72% and 8.5% respectively; the mass percentages of cementitious materials are: cement 50%, basalt micropowder 35%, slag micropowder 10%, Limestone powder 5%; mass percentage of coarse aggregate: 5-10mm: 30%; 10-20mm: 55%; 20-30mm: 15%; fine aggregate: sand fineness modulus 2.6; activator chemically pure Na 2 SO 4 3% of the mass percentage of the cementitious material, the water reducer NSOb-naphthalenesulfonic acid formaldehyde high-condensation sodium salt is 1.5% of the mass percentage of the cementitious material, the water-binder ratio is 0.44, and the sand rate is 36%;

[0024] (2) Dry the basalt, slag and limestone until the moisture content is less than 1%, and put them into a ball mill to grind them respectively until the specific surface area is 450㎡ / ㎏, 550㎡ / ㎏ and 600㎡ / ㎏ to obtain basalt powder and slag powder and limestone powder;

[0025] (3) Mixing the cement, basalt...

Embodiment 2

[0031] (1) The mass percentages of cementitious materials, aggregates and water are 21.5%, 70.7% and 7.8% respectively; the percentages of cementitious materials are: cement 40%, basalt micropowder 30%, slag micropowder 20%, limestone powder 10% %; mass percentage of coarse aggregate: 5-10mm: 35%; 10-20mm: 55%; 20-30mm: 10%; fine aggregate: sand fineness modulus 2.7; 2 SO 4 It is 3% of the mass percentage of the cementitious material, the water reducing agent NSOb-naphthalenesulfonic acid formaldehyde high-condensation sodium salt is 2% of the mass percentage of the cementitious material, the water-binder ratio is 0.36, and the sand rate is 32%;

[0032] (2) Dry the basalt, slag and limestone until the moisture content is less than 1%, and put them into a ball mill to grind them respectively until the specific surface area is 500㎡ / ㎏, 600㎡ / ㎏ and 720㎡ / ㎏;

[0033] (3) Mixing the cement, basalt micropowder, slag micropowder and limestone powder obtained in step (2) uniformly acco...

Embodiment 3

[0040] (1) The mass percentages of cementitious materials, aggregates and water are 24.2%, 66.1% and 9.7% respectively; the percentages of cementitious materials are: cement 40%, basalt micropowder 30%, slag micropowder 20%, limestone powder 10% %; mass percentage of coarse aggregate: 5-10mm: 45%; 10-20mm: 45%; 20-30mm: 10%; fine aggregate: sand fineness modulus 2.8; 2 SO 4 3% of the mass percentage of the cementitious material, the water reducing agent NSOb-naphthalenesulfonic acid formaldehyde high-condensation sodium salt is 2.5% of the mass percentage of the cementitious material, the water-binder ratio is 0.40, and the sand rate is 40%;

[0041] (2) Dry the basalt, slag and limestone until the moisture content is less than 1%, and put them into a ball mill to grind them respectively until the specific surface area is 520㎡ / ㎏, 610㎡ / ㎏ and 800㎡ / ㎏;

[0042] (3) Mixing the cement, basalt micropowder, slag micropowder and limestone powder obtained in step (2) uniformly accordin...

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Abstract

The invention discloses a method for preparing concrete by using basalt micropowder-slag micropowder-limestone powder as a blending material. The method is characterized in that (1), raw materials consist of a gelatinizing material, an exciting agent, aggregate, additives and water, wherein the gelatinizing material is formed by compounding cement, basalt micropowder, slag micropowder and limestone powder; and the additives comprise an alkaline exciting agent and a high-efficiency water-reducing agent; (2), the specific surface area of the basalt micropowder, the slag micropowder and the limestone powder is controlled to be 400 to 600 m<2>/kg, 500 to 800 m<2>/kg and 600 to 900 m<2>/kg respectively; (3), small-size continuous grading coarse aggregate is adopted; and (4), the exciting agentis dissolved into water in advance and is mixed with the mixing water. By the method, the process is simple; concrete of C20-C60 grade can be prepared; the adding amount of industrial residues in theconcrete can be increased obviously; the concrete has high work performing; and durability such as shrinkage resistance, freezing resistance, seawater erosion resistance and the like is improved obviously.

Description

Technical field [0001] The present invention belongs to the field of building material technology. It specially involves a method of using Xuanwu Rock Micro Powder-Standard Micro Mink-Limin Powder composite ore powder as a mixing material to prepare high-performance concrete. Background technique [0002] With the high -level, cross -scale, light -oriented, undergroundization, and environmental environment of modern buildings, the demand for good working, high -intensity, and durability of concrete is growing. High -performance concrete has become a science and technology workerProjects for competing research.In recent years, research on high -performance concrete focuses on several aspects of concrete structure design, low water -grade ratio, active mineral fine doping, and the use of high -efficiency outer agents.Therefore, the use of industrial waste residue, natural minerals, or composite mineral powder as a concrete blending is one of the effective means to achieve high -per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08
Inventor 马清清陈平赵艳荣刘荣进
Owner 南宁兴典混凝土有限责任公司
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