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Concrete raw material, composite powder for concrete and preparation method thereof
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A technology for concrete and composite powder, applied in the field of materials, can solve the problems of insufficient supply of admixtures and scarcity of high-quality mineral admixtures, and achieve the effects of improving technical and economic performance, improving performance and solving environmental protection.
Active Publication Date: 2021-06-04
中建西部建设新疆有限公司 +1
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Problems solved by technology
However, at present, high-quality mineral admixtures are increasingly scarce, and admixtures in many areas are in short supply.
Method used
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preparation example Construction
[0041] The preparation method of composite powder for above-mentioned concrete,
[0042] Mix volcanic ash, desulfurized gypsum, oil shale, steel slag, and sodium metaaluminate to obtain a mixture; grind the mixture until the specific surface area is 480-520kg / m 3 , joined Hua Qiansu.
[0043] Further, the above mixture is ground by ball milling, and the gradation ratio of the ball milling steel section is: 11-11.5kg of Φ70mm steel balls, 16-17kg of Φ60mm steel balls, 18-18.5kg of Φ50mm steel balls, 10-11kg of Φ40mm steel balls .
[0044] The surface area is 480-520kg / m2 obtained by grinding with the gradation ratio of the above-mentioned ball mill steel section 3 powder.
[0045] The present invention also provides a technical solution:
[0046] A kind of concrete raw material, concrete comprises above-mentioned composite powder for concrete.
[0047] Further, the composite powder for concrete accounts for 38-42% of the total mass of concrete raw materials. In this embod...
Embodiment 1
[0051] The present embodiment provides a composite powder for concrete, which mainly includes the following components in parts by weight:
[0052] 30 parts of volcanic ash, 5 parts of desulfurized gypsum, 10 parts of oil shale, 15 parts of steel slag, 4 parts of activator, and 3 parts of Huaqiansu; the activator is sodium metaaluminate.
Embodiment 2
[0054] The present embodiment provides a composite powder for concrete, which mainly includes the following components in parts by weight:
[0055] 50 parts of volcanic ash, 15 parts of desulfurized gypsum, 30 parts of oil shale, 30 parts of steel slag, 6 parts of activator, and 4 parts of Huaqiansu; the activator is sodium metaaluminate.
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Abstract
The invention relates to the field of materials, in particular to concrete raw materials, composite powder for concrete and a preparation method thereof. A composite powder for concrete, the composite powder for concrete mainly includes the following components in parts by weight: 30-50 parts of volcanic ash, 5-15 parts of desulfurized gypsum, 10-30 parts of oil shale, 15-30 parts of Part steel slag, 4-6 parts activator, 3-4 parts Huaqiansu; the activator is sodiumsulfate or sodium metaaluminate. Huaqiansu improves the performance of concrete mixtures. Volcanic ash, desulfurized gypsum, oil shale and steel slag have good technical coupling under the action of Huaqiansu. The activator can improve the performance of the composite powder and achieve effective supply while improving It has high technical and economic performance, and makes full use of low-quality industrial waste that could not be used in the past, and solves a series of problems such as environmental protection.
Description
technical field [0001] The invention relates to the field of materials, in particular to concrete raw materials, composite powder for concrete and a preparation method thereof. Background technique [0002] High-performance concrete is a new type of high-tech concrete, which uses modern concrete science and technology to increase the safe service life of concrete structures and reduce waste and construction waste caused by repairing or demolishing old concrete structures; high-performance concrete can be used in large quantities Industrial waste and ore can reduce the consumption of natural resources and energy, and reduce environmental pollution; high-performance concrete has excellent working performance, is convenient for construction, can save labor, reduce energy consumption, and so on. Therefore, high performance concrete is the way out for the sustainable development of concrete. [0003] High-quality mineral admixtures are an indispensable part of high-performance c...
Claims
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