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Micro-slump concrete for roller compacted concrete dam and construction method thereof

A technology for rolling concrete and concrete, applied in the field of concrete, can solve the problems of large construction interference, difficult to guarantee construction quality, difficult rolling and other problems

Active Publication Date: 2007-10-24
CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES
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  • Abstract
  • Description
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Problems solved by technology

[0007] However, during the construction of the RCC dam, due to the use of large-scale construction machinery, the upper and lower reaches of the RCC dam close to the formwork, the bank slope of the river channel, the water stop sheet, and the corridor holes are difficult to roll, and the construction interference is large and Construction quality is not easy to guarantee and other issues

Method used

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  • Micro-slump concrete for roller compacted concrete dam and construction method thereof

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0025] The invention is used for the micro-slump concrete of the roller compacted concrete dam, including cement, fly ash, coarse aggregate, fine aggregate, retarding high-efficiency water reducer, air-entraining agent, water, and the slump of the prepared concrete Less than 0.5cm, the consistency VC value is 1-3 seconds.

[0026] The specific ratio of each component is: coarse aggregate 1200 ~ 1400kg / m 3 , fine aggregate 750~900kg / m 3 , mixing water 90~130kg / m 3 , the retarding high-efficiency water reducer is 0.6-1.5% of the weight of the cementitious material, and the amount of the causative agent to control the air content of the concrete is 3-5%; the maximum particle size of the coarse aggregate is 40-80mm, and the maximum particle size of the fine aggregate is 40-80mm. The fineness modulus is 2.4-3.2; the water-binder ratio of the micro...

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Abstract

The invention discloses a micro-collapse concrete of rolled concrete dam and constructing method, which comprises the following parts: cement, coal ash, rough aggregate, fine aggregate, slow setting high-effective dehydragent, air-entrainer and water, wherein the slump of allocated concrete is less than 0. 5cm with consistency value VC at 1-3s; the allocation of the micro-collapse concrete is similar to internal rolling concrete of dam through adding some gelling material slightly, which saves cost with high quality obviously.

Description

technical field [0001] The invention relates to concrete, especially micro-slump concrete used for roller compacted concrete dams and a construction method thereof. Background technique [0002] At present, according to the difference in concrete slump, it is usually divided into normal concrete and roller compacted concrete. Due to the difference in consistency, their construction is also different, usually: [0003] ① The slump of normal concrete is divided into three categories according to size: fluid concrete (10-17) cm, plastic normal concrete (5-8) cm, dry hard concrete (1-3) cm, and vibrating rods are used for construction. Reality. [0004] ② The slump of the roller compacted concrete is 0cm, and the VC value is (6-10) seconds. Vibration rollers are used for compaction during construction. [0005] Roller compacted concrete dam building is a new concrete dam technology that has emerged and developed rapidly in recent decades, and has been more and more widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/06C04B14/00C04B18/08B28B1/093
CPCY02W30/91
Inventor 武永新杨天生曹楚生
Owner CHINA WATER RESOURCES BEIFANG INVESTIGATION DESIGN & RES
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