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Dam concrete and preparation method thereof

A concrete and concrete structure technology, applied in the field of building materials, can solve the problems of poor physical properties such as concrete durability and corrosion resistance, and achieve the effect of strong durability and strong corrosion resistance

Active Publication Date: 2009-12-23
SINOHYDRO BUREAU 1 CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a dam concrete and its preparation method to solve the problems of poor physical properties such as durability and corrosion resistance of traditional concrete

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  • Dam concrete and preparation method thereof
  • Dam concrete and preparation method thereof

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Embodiment Construction

[0015] The strength grade of concrete for a dam is C25, the strength guarantee rate is 95%, and the impermeability grade of concrete is P 8 . The slump of the concrete mixture is 80mm. The concrete ingredients of dams include cement, water, sand, gravel, silica fume powder, air-entraining agent rosin soap, and water-reducing agent wood calcium.

[0016] Coarse aggregate in concrete is pebbles, the maximum particle size is 150mm, and the gradation is: extra large stones (150-80mm), large stones (80-40mm), medium stones (40-20mm) and small stones (20-5mm ) each occupy a certain proportion, the ratio is 30:30:20:20, and the density is 2.70g / cm 3 , the surface water content of medium stones and small stones is 0.3% and 0.8%, and the large stones and extra large stones are in a saturated surface dry state. The fine aggregate in the concrete is river sand with a fineness modulus of 2.60 and a density of 2.65g / cm 3 , the surface moisture content is 4.5%.

[0017] Slag cement wit...

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Abstract

The invention discloses dam concrete and a preparation method thereof. The dam concrete is characterized by being prepared from the following materials: cement, water, sands, stones, siliceous dust powder, an air entraining agent rosinsoap and water reducing agent wooden-calcium, wherein the cement is selected from slag cement with 50-70 percent of slag mixing amount; the water is drinking water; the fineness modulus of the sands is greater than 2.5; the grain diameters of the stones are controlled within 150mm; the using amount of the siliceous dust powder is 5 percent of that of the cement; the mixing amount of the air entraining agent rosinsoap is 1 percent of the using amount of the cement; the mixing amount of the water reducing agent wooden-calcium is 0.5 percent of using amount of the cement; when the dam concrete is poured, a prefabricated reinforced concrete facing slab is used as a permanent moulding plate, and the dam concrete should prevent a construction gap from being arranged in a water level changing area, and the construction gap is sprayed with an epoxy adhesive. A high and large dam concrete structure member adopts layered water reducing for prepared concrete, 0.5 percent of the water is reduced by every 0.3m, and secondary vibration and secondary surface plastering measures are taken. The invention has the characteristics of high durability and strong corrosion resistance.

Description

technical field [0001] The invention relates to the field of building materials, in particular to embankment concrete and a preparation method. Background technique [0002] Due to the frequent or periodic contact with seawater, the physical and chemical effects of seawater or marine atmosphere (containing chloride ions), or the impact and abrasion of waves, dyke concrete can easily damage the concrete in this environment. Therefore, in addition to meeting the workability, strength and other requirements of construction, the embankment concrete should also have the impermeability, corrosion resistance and frost resistance required by marine engineering according to the specific use conditions of the building structure , Prevent corrosion of steel bars and resist ice impact performance. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a kind of embankment concrete and its preparation method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/08C04B14/06
Inventor 朱奎
Owner SINOHYDRO BUREAU 1 CO LTD
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