High strength silica powder concrete and construction technology

A concrete and high-strength technology, applied in the field of construction engineering, can solve the problems of small water-to-binder ratio, large amount of cement, and difficulty in bleeding, and achieve the effects of reducing adiabatic temperature rise, saving construction, and simplifying construction.

Inactive Publication Date: 2009-09-23
吴运华
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to its small water-binder ratio, large amount of cement and not easy to bleed, it is more prone to plastic shrinkage than ordinary concrete, and its early dry shrinkage and its own vol

Method used

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  • High strength silica powder concrete and construction technology
  • High strength silica powder concrete and construction technology
  • High strength silica powder concrete and construction technology

Examples

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[0034] Hereinafter, we will make further explanation in conjunction with specific embodiments.

[0035] The Pubugou Hydropower Station's spillway tunnel project is located on the left bank of the Pubugou Hydropower Station and is one of the main flood discharge buildings of the Pubugou Hydropower Station. The spillway tunnel is arranged in the granite body on the left bank, the tunnel line is straight and the azimuth angle is N60°30′W. The spillway tunnel is composed of three parts: an inlet, a tunnel, and an outlet. The maximum discharge flow of the spillway tunnel is 3412m 3 / s, the maximum flow rate is 42m / s. Due to the high elevation of the spillway, the Pubugou Reservoir mainly uses spillway tunnels when the water level is low. The spillway tunnel has a huge discharge volume and a very large discharge power. When the spillway tunnel is in operation, the high-speed water flow in the tunnel will have a strong erosion and cavitation effect on the concrete lining structure, and t...

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Abstract

The invention discloses high strength silica powder concrete and a construction technology thereof. The optimal selection of raw materials and the optimal design of mixing proportion are used as footholds, the measure of mixing pulverized fuel ash and silica powder with selected moderate-heat or low heat cement replaces other measures of mixing composite high efficiency water reducing agent, fibers, and the like with parts of cement, so as to reduce the use level of the cement as much as possible and to reduce the adiabatic temperature rise of the cement, thereby greatly overcoming the disadvantages of the silica powder, improving the early-age cracking-resistance property of the cement, and giving full play to the gap filling efficacy and the pozzolanic reaction property of the silica powder. While strengthening the intensity of the concrete, the invention effectively avoids the technical problem of early-age cracking during the silica powder construction.

Description

technical field [0001] The invention relates to concrete and a construction method, in particular to high-strength silicon powder concrete and a construction method, and belongs to the technical field of construction engineering. Background technique [0002] At present, sand washing structures, flood discharge structures, and water diversion structures in water conservancy and hydropower projects are often used frequently during the operation period due to the effect of moving or suspended matter. Maintenance is frequent and maintenance costs are high. In order to prolong the service life of buildings and reduce maintenance costs, it is often used to add silica fume to concrete to obtain high-strength, abrasion-resistant, cavitation-resistant, and abrasion-resistant concrete. However, due to its small water-binder ratio, large amount of cement and not easy to bleed, it is more prone to plastic shrinkage than ordinary concrete, and its early dry shrinkage and its own volume...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/02C04B14/06C04B16/06
CPCC04B28/04Y02W30/91C04B14/02C04B14/06C04B16/0633C04B18/08C04B18/12C04B20/0096C04B24/2641C04B40/0032C04B2103/302
Inventor 吴运华耿震冉蓉谢英奎詹光文张家富
Owner 吴运华
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