Insulating concrete material and preparation technology

A technology of concrete and cementitious materials, which is applied in the field of special performance building materials and their preparation, can solve the problems of high humidity, low resistivity, and high cost, and achieve the effects of simple preparation process, cheap and easy-to-obtain raw materials, and reliable insulation performance

Active Publication Date: 2012-08-01
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The PCT patent with the application number 200780101006.6 discloses a polymer concrete electrical insulation system. The patent prepares electrical insulation concrete by using epoxy resin as the bonding component. This concrete is different from ordinary concrete with cement as the main bonding component. The cement concrete is a kind of resin concrete, which uses epoxy resin as the adhesive component. This concrete has good electrical insulation performance, but the main problem is that the cost is too high and it is not suitable for large-scale use. At the same time, this resin Concrete is also less durable than ordinary cement concrete
The patent application number 200810046967.8 discloses a high-resistance and high-impermeability concrete material and its preparation method. The patent realizes its high resistance and high impermeability by adding polymers and lightweight aggregates. The main problem of this method is that through Adding pre-wetted lightweight aggregate as the internal curing component of concrete achieves high density and high impermeability of concrete, but this method will cause the internal humidity of concrete to be too high, so that its resistivity is relatively low and cannot be realized electrical insulation

Method used

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  • Insulating concrete material and preparation technology
  • Insulating concrete material and preparation technology
  • Insulating concrete material and preparation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for an insulating concrete material, comprising the steps of:

[0030] 1) Take raw materials according to Table 1:

[0031] Table 1 Embodiment 1 raw material proportioning

[0032]

[0033] The cementitious material is: 70% cement + 30% fly ash

[0034] Fine aggregate is: river sand

[0035] Coarse aggregate is: crushed stone

[0036] The insulation additive is: 98% ethylene-vinyl acetate copolymer emulsion + 2% silane waterproofing agent

[0037] The admixture is: polycarboxylate high-efficiency water reducer

[0038] (2) Mix and stir the cementitious material, fine aggregate and coarse aggregate together for 2 minutes, then add insulating additives, admixtures and water, continue stirring for 3 minutes, and then mold it;

[0039] (3) After the concrete is hardened and removed from the mold, it is first cured in an environment with a relative humidity of 95% for 7 days, and then cured in an environment with a relative humidity of 20% for 28...

Embodiment 2

[0041] A preparation method for an insulating concrete material, comprising the steps of:

[0042] 1) Take raw materials according to Table 2:

[0043] Table 2 Embodiment 2 raw material proportioning

[0044]

[0045] The cementitious material is: 100% cement

[0046] Fine aggregate is: machine-made sand

[0047] Coarse aggregate is: crushed stone

[0048] Insulation additives: 80% vinyl acetate and higher fatty acid vinyl ester copolymer powder + 20% penetrating crystalline waterproofing agent

[0049] Admixture: 95% naphthalene superplasticizer + 5% defoamer

[0050] (2) Mix and stir the cementitious material, fine aggregate and coarse aggregate together for 1 minute, then add insulation additives, admixtures and water, and continue stirring for 5 minutes before molding into a mold;

[0051] (3) After the concrete is hardened and demoulded, it is cured for 14 days in an environment with a relative humidity of 100%, and then cured for 56 days in an environment with a re...

Embodiment 3

[0053] A preparation method for an insulating concrete material, comprising the steps of:

[0054] 1) Take raw materials according to Table 3:

[0055] Table 3 Embodiment 3 raw material proportioning

[0056]

[0057] The cementitious material is: 60% cement + 35% fly ash + 5% silica fume

[0058] Fine aggregate is: river sand

[0059] Coarse aggregate is: crushed stone

[0060] Insulation additives: 90% silane waterproofing agent + 10% styrene and butadiene copolymer powder

[0061] The admixture is: 99% melamine-based superplasticizer + 1% air-entraining agent

[0062] (2) Mix and stir the cementitious material, fine aggregate and coarse aggregate together for 3 minutes, then add insulation additives, admixtures and water, continue stirring for 2 minutes, and then mold it;

[0063] (3) After the concrete is hardened and removed from the mold, it is first cured in an environment with a relative humidity of 85% for 3 days, and then cured in an environment with a relati...

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Abstract

The invention relates to an insulating concrete material and a preparation method thereof. The concrete material is prepared by mixing a cementing material, coarse aggregate, fine aggregate, insulating additive, admixture and water, wherein the using amount of the cementing material is 350 to 700kg / m<3>; the using amount of the coarse aggregate is 850 to 1,150kg / m<3>; the using amount of the insulating additive is 20 to 150kg / m<3>; the admixture in an amount which is 0.2 to 2.0 percent based on the mass of the cementing material is used; and the volume rate of sand is 35 to 52 percent; and the ratio of water to the cementing material is 0.23 to 0.40. The electrical resistivity of the concrete material can be improved obviously, and the insulating concrete material is prepared, and can be used for the field with the insulating requirement on a concrete structure.

Description

technical field [0001] The invention relates to a building material with special performance and a preparation method thereof, and specifically designs an insulating concrete material and a preparation technology thereof. Background technique [0002] Concrete is the most widely used building material in modern times, and it is also the largest man-made material at present. Compared with other common building materials, cement concrete production has low energy consumption, wide sources of raw materials, and simple process, so the production cost is low. It also has the characteristics of durability, fire prevention, strong applicability, and convenient application. Therefore, for a long time to come, cement concrete will still be the most widely used and used building material. With the wide application of concrete materials and components, people put forward new requirements for the performance of concrete materials in some special fields. [0003] my country is vigorous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/24C04B111/92
Inventor 李化建易忠来谢永江谭盐宾
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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