Railway traffic cross-sea segment concrete

A technology of rail transit and concrete, which is applied in the field of rail transit cross-sea segment concrete, and can solve the problems of no concrete base material

Inactive Publication Date: 2017-02-01
厦门智欣建材集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The durability of the concrete shield segment of rail transit generally needs to meet the requirement of 100 years. The concrete shield segment of the sea-crossing section must meet the above durability requirements, and one side of it needs to contact seawater or contain seawater. Soil, the other side is in contact with the air. As we all know, the corrosion of seawater or soil containing seawater is much higher than that of the surrounding soil in the non-sea-crossing section, but there is still no way to adapt to the above environment and achieve the corresponding durability in the prior art Required Concrete Substrate

Method used

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  • Railway traffic cross-sea segment concrete
  • Railway traffic cross-sea segment concrete
  • Railway traffic cross-sea segment concrete

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Embodiment 1～2

[0031] For rail transit cross-sea segment concrete, the sand rate is 36%, and the specific mix ratio is as follows:

[0032]

[0033] Mix the above-mentioned components uniformly to make concrete slurry, and place it in a segment mold for molding. The performance indicators of the prepared concrete are as follows:

[0034]

[0035] The specific method for preparing the cross-sea segment concrete for the above-mentioned rail transit cross-sea segment is as follows: the raw material components that have passed the inspection are sent to the mixer through the metering equipment automatically controlled by a computer, and then mixed evenly to form a concrete mixture. And placed in the segment mold molding. Through the technical process of one-time dough collection, resting, second-time dough collection, steam curing, mold removal, water curing for 7 days and natural curing for more than 28 days, the cross-sea view sheet is obtained.

[0036] The segments prepared from the r...

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Abstract

The invention discloses railway traffic cross-sea segment concrete, of which the strength is C55P12, electric flux 56-day age (C) is less than 1000 and chloride ion diffusion coefficient 90-day age is not more than 2*10<-12> m<2>/s; alkali content is controlled to be not more than 2.1 kg/m<3>, the content of SO3 in the concrete is less than 4% of a cementing material, the content of chloride ions in unit volume of the concrete is less than 0.1%, water-binder ratio of the concrete is 0.32 and the addition quantity of an admixture is 45%. The concrete particularly includes the following raw materials: 142-143 kg/m<3> of water, 247-249 kg/m<3> of cement, 90-115 kg/m<3> of fly ash, 90-115 kg/m<3> of ore slag powder, 1160-1163 kg/m<3> of impact-crushed stone, 645-655 kg/m<3> of river sand, and 4.5-4.9 kg/m<3> of a polycarboxylate water reducer. A pipe segment produced from the railway traffic cross-sea segment concrete can adapt a serious corrosive environment in a cross-sea zone, and can reach durability demand of 100 years.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a rail transit cross-sea segment concrete. Background technique [0002] The durability of the concrete shield segment of rail transit generally needs to meet the requirement of 100 years. The concrete shield segment of the sea-crossing section must meet the above durability requirements, and one side of it needs to contact seawater or contain seawater. Soil, the other side is in contact with the air. As we all know, the corrosion of seawater or soil containing seawater is much higher than that of the surrounding soil in the non-sea-crossing section, but there is still no way to adapt to the above environment and achieve the corresponding durability in the prior art Concrete substrate required. Contents of the invention [0003] The object of the present invention is to overcome the defects of the prior art and provide a rail transit cross-sea segment co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/24
CPCC04B28/04C04B2111/24C04B22/002C04B18/08C04B18/141C04B14/02C04B14/068C04B24/24
Inventor 尤仲鹏陈振法林碧玲
Owner 厦门智欣建材集团有限公司
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