High-performance rolling concrete and preparation method thereof

A RCC, high-performance technology for climate sustainability, sustainable waste treatment, solid waste management, etc. It can solve problems such as high water consumption, poor durability of RCC dams, and achieve low carbonation resistance. , high grindability, good durability

Inactive Publication Date: 2008-04-30
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Through the research and data analysis of domestic RCC dams and foreign RCC dams (Chingshan Dam in the United States), it can be seen that high water consumption and low fly ash content will inevitably lead to poor durability of RCC dams

Method used

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  • High-performance rolling concrete and preparation method thereof
  • High-performance rolling concrete and preparation method thereof

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Embodiment approach

[0022] Raw materials: 32Kg of cement with a strength of not less than 42.5MPa, 128Kg of fly ash, 883Kg of natural sand or artificial sand with a fineness in the range of medium sand, 1325Kg of stones with a particle size within the range of 5-40mm, and high-performance polycarboxylate water reducing Agent 2.56Kg and water 72Kg.

[0023] Preparation method: first mix cement and national standard I grade fly ash together, then add sand, gravel, cement and national standard I grade fly ash cementitious material, polycarboxylate high-performance water reducer and water Mix in a forced concrete mixer for 100 seconds to get 1 cubic meter of high-performance roller compacted concrete.

[0024] During production, the amount of sand and stone to be added as aggregate is determined according to the amount of roller compacted concrete to be produced and the required apparent density. When aggregate is added, the apparent density of the produced roller compacted concrete is controlled. A...

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Abstract

The invention provides a concrete with high rolling property and relative preparation, for overcoming the defect of prior concrete as short service life. The inventive concrete is made from gelatinizing material, skeleton material, water and additive, wherein the gelatinizing material consumption is 140-220Kg / m3 concrete, the additive is water reducer, which consumption is 0.7-3.0% of the gelatinizing material, the ratio between water and gel is 0.30-0. 5. The preparation comprises that prepares gelatinizing material, water reducer, water, and skeleton water into rolling concrete which apparent density is 2400-2600Kg / m3. Compared with prior art, the inventive high-property rolling concrete reduces water-gel ratio to 0.45, and improves coal ash consumption to 85%, while the produced rolling concrete has long service life, high rolling property, barrier property, freezing resistance, corrosion resistance, carbonation resistance, and low hydration heat, which realizes long service life, technicality, low cost and high safety of rolling concrete dam construction.

Description

technical field [0001] The invention relates to concrete and a preparation method thereof, in particular to a roller compacted concrete used for dam building and a preparation method thereof. Background technique [0002] Roller compacted concrete is a kind of dry hard concrete, which is constructed by layered roller compaction. Because of its advantages of less cement material consumption, low cost, fast construction progress and wide source of materials, it has become an important dam building material for water conservancy and hydropower projects. . Through the research and data analysis of domestic RCC dams and foreign RCC dams (Chingshan Dam in the United States), it can be seen that high water consumption and low fly ash content will inevitably lead to poor durability of RCC dams. The emergence of the second-generation concrete superplasticizer represented by naphthalenesulfonate formaldehyde condensate (NSF) has further reduced the water consumption of roller compact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/08
CPCC04B2201/20C04B28/02Y02W30/91C04B14/02C04B14/06C04B18/08C04B20/0048C04B40/0028C04B2103/302
Inventor 范福平何金荣梁文泉曾正宾苏耘杨金娣
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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