High-performance panel concrete and preparation method thereof

A concrete and high-performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of volume stability panel concrete cracking and crack resistance of panel concrete. Achieve suitable strength and strength development, workability, high volume stability

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

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Problems solved by technology

However, due to the limitation of the performance of traditional cement concrete materials, the problem of volume stability of panel concrete has always led to cracking of

Method used

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  • High-performance panel concrete and preparation method thereof

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Example Embodiment

[0025] The preferred embodiment of the present invention:

[0026] Raw materials: 157Kg of cement with strength not less than 42.5MPa, 158Kg of national standard I-level fly ash, 804Kg of natural or artificial sand with a fineness in the range of medium sand, 1205Kg of gravel with a particle size in the range of 5-40mm, high polycarboxylic acid series Performance water reducing agent 10.12Kg, water 107.5Kg and polypropylene chemical fiber 0.9Kg.

[0027] Preparation method: first mix cement and national standard I grade fly ash uniformly, and then sequentially mix sand, gravel, uniformly mixed cement and national standard grade I fly ash cementitious material, polycarboxylic acid series high-performance water reducing agent, poly Acrylic chemical fiber and water are added to the forced concrete mixer and mixed for 100 seconds, and the apparent density is about 2500Kg / m. 3 One cubic meter of high-performance panel concrete.

[0028] During production, the amount of sand and stone a...

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Abstract

The invention provides a high-property concrete for preparing the panel of panel rock-fill dam, and relative preparation process, for overcoming the defect of prior concrete which volume is instable. The inventive concrete is made from gelatinizing material, skeleton material, water and additive, wherein the gelatinizing material consumption is 280-390Kg/m3 concrete, the additive is water reducer, which consumption is 0.7-3.5% of the gelatinizing material, the ratio between water and gel is 0.30-0.45. The preparation comprises that adds skeleton material (sand and stone), gelatinizing material (cement and coal ash), water reducer and water into a mixer in turn, and mixes for 90-120s, to prepare panel concrete which apparent density is 2400-2600Kg/m3. The high-property panel concrete prepared by the inventive formula and method has high volume stability, high crack resistance, barrier property, freezing resistance, corrosion resistance, and carbonation resistance.

Description

technical field [0001] The invention relates to a concrete and a preparation method thereof, in particular to a high-performance concrete used for preparing a face plate of a face rockfill dam and a preparation method thereof. Background technique [0002] Concrete face rockfill dam is the most common and fastest growing type of earth-rockfill dam in water conservancy and hydropower engineering. [0003] With the continuous progress of science and technology, especially the emergence of large-scale vibrating mills, the filling density of rockfill bodies has been significantly increased, the deformation and water seepage have been reduced, and the safety, economy and adaptability are excellent. Competitive new dam type. The concrete face is the main anti-seepage structure of the face rockfill dam, and it is also the interface between water, air and rockfill, and the working environment is complex. Therefore, there are high requirements for the performance of the concrete use...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/06C04B16/06C04B14/38
CPCC04B2201/20C04B28/02Y02W30/91C04B14/02C04B14/06C04B18/08C04B20/0048C04B40/0028C04B2103/302
Inventor 兰春杰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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