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Heat-resistant concrete and preparation method thereof

A heat-resistant concrete and admixture technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as casualties, property and personnel loss, property loss, etc. The effect of improving the service life and working performance

Inactive Publication Date: 2015-12-30
SHANGHAI MCC ENVIRONMENTAL ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the economy, the use of fire and electricity in daily production and life has increased significantly, and the factors causing fire accidents have also increased sharply. Fire accidents, especially serious fire accidents, have caused huge property losses and casualties to the society. Building materials with lower fire resistance ratings can lead to more serious property and human losses in a fire

Method used

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  • Heat-resistant concrete and preparation method thereof
  • Heat-resistant concrete and preparation method thereof
  • Heat-resistant concrete and preparation method thereof

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preparation example Construction

[0065] The preparation process used in the embodiment is the preparation process of ordinary concrete, that is, the aggregate (steel slag aggregate, blast furnace slag, basalt) is mixed first, and then the powder (cement, mineral powder, steel slag powder, Silica fume) is poured in, after stirring, add water and liquid admixture and continue to stir evenly to become the heat-resistant concrete of the present invention.

[0066] According to "YB / T4252-2011 Technical Specification for Application of Heat-resistant Concrete", the technical indicators are tested. The residual strength adopts the method in this standard: after the standard curing, the 100×100×100mm concrete test block is placed in an electric heating constant temperature drying oven, and dried at 110°C±5°C for 24h. The dried test piece is heated in an electric furnace, and the temperature is raised to 700°C at an average speed of 2°C / min to 3°C / min. After a constant temperature of 3 hours, it is cooled to room temp...

Embodiment 1

[0069] Mix 500 parts of blast furnace slag, 1050 parts of basalt, and 650 parts of steel slag aggregate, and stir for 15 seconds. Then pour 250 parts of cement, 150 parts of mineral powder, and 100 parts of steel slag powder, stir for 15 seconds, then add 160 parts of water, stir evenly (stirring time 2min), and the slump is 50mm. The prepared concrete was made into 2 groups (6 pieces) of 100×100×100mm test blocks, and the experiment was carried out after 7 days of curing. One group was subjected to the compressive strength test, and the other group was subjected to the residual strength test. The 7d compressive strength is 32.5MPa, and the 7d residual strength is 29.6MPa.

Embodiment 2

[0071] Mix 450 parts of blast furnace slag, 700 parts of basalt, and 750 parts of steel slag aggregate, and stir for 15 seconds. Then pour 200 parts of cement, 120 parts of mineral powder, and 50 parts of steel slag powder, and stir for 15 seconds, then add 2.6 parts of liquid water reducer, add 120 parts of water and stir for 10 seconds, and then pour it into the dry concrete. Stir evenly (stirring time 2min), the slump is 30mm. The prepared concrete was made into 2 groups (6 pieces) of 100×100×100mm test blocks, and the experiment was carried out after 7 days of curing. One group was subjected to the compressive strength test, and the other group was subjected to the residual strength test. The 7d compressive strength is 40.1MPa, and the 7d residual strength is 31.9MPa.

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Abstract

The invention relates to the field of concrete building materials, in particular to heat-resistant concrete and a preparation method thereof. The heat-resistant concrete is prepared from, by weight, 150-250 parts of cement, 50-150 parts of mineral powder, 0-5 parts of silica fume, 0-100 parts of steel slag powder, 450-700 parts of blast furnace granulated slag, 600-1700 parts of basalt, 0-800 parts of steel slag aggregates, an appropriate amount of water and an appropriate quantity of additives, wherein the total sum of the cement, the mineral powder, the silica fume and the steel slag powder is less than or equal to 450 parts. According to the heat-resistant concrete and the preparation method thereof, by mixing a certain quantity of admixtures in the concrete, the hydration reaction of the cement is more complete, the compactibility and water retaining property of the concrete are further improved while the heat resistance of the concrete is improved, the bleeding and segregation phenomena are reduced, and the working property of the concrete is improved.

Description

technical field [0001] The invention relates to the field of concrete building materials, in particular to a heat-resistant concrete and a preparation method thereof. Background technique [0002] With the rapid development of the economy, the use of fire and electricity in daily production and life has increased significantly, and the factors causing fire accidents have also increased sharply. Fire accidents, especially serious fire accidents, have caused huge property losses and casualties to the society. Building materials with lower fire resistance ratings can cause more serious property and human losses in a fire. [0003] It can be said that how to solve the problem of building fire resistance economically and effectively is of great significance in today's rapid increase in fire and unsafe factors. In recent years, with the wide application of some new materials, new processes and new technologies in the field of construction, the performance of building components h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B18/14C04B14/06
CPCY02W30/91
Inventor 汪海龙刘国威苏剑韩甲兴陆珺朱李俊
Owner SHANGHAI MCC ENVIRONMENTAL ENG TECH CO LTD
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