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High-durability concrete

A concrete and durable technology, applied in the field of high-durability concrete, can solve the problems of water content decline, poor regularity of groundwater enrichment in aquifers, and development depth limited by groundwater dynamic conditions, so as to enhance its own durability and improve sulfate resistance. The effect of erosion properties

Pending Publication Date: 2022-04-29
中国华西企业股份有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The bedrock fissure water is groundwater. The flow of groundwater will dissolve the contained gypsum, and form a network of weathered zone dissolution pores and dissolution pores along the dissolution pores or fissures, creating good channels and spaces for groundwater supply, storage, and runoff. , forming the aquifer in the weathered zone; however, due to the softness of the mudstone, the fissures are mostly slightly open or closed, and the development depth of dissolved pores and dissolved pores is limited by groundwater dynamic conditions. Decrease, the water content decreases; the regularity of groundwater enrichment in this aquifer is poor

Method used

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Experimental program
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Effect test

Embodiment 1

[0021] The present embodiment 1 provides a kind of high durability concrete, and the raw material proportion of concrete described in every cubic meter comprises: cement 273~293kg / m 3 , The total amount of gelling material is 340~450kg / m 3 , Sand 703~710kg / m 3 , Stone 1064~1099kg / m 3 , Admixture 9.66~10.35kg / m 3 , Polypropylene fiber 0.9~1.2kg / m 3 and the remaining amount of water; the cementitious material includes fly ash 105~113kg / m 3 , S95 mineral powder 42~45kg / m 3 And waterproofing agent 29~32kg / m 3 .

[0022] Compared with the existing technology, due to the presence of sulfate in groundwater and the irregularity of its flow direction, for large-volume concrete, the sulfate in groundwater has a strong erosive force on concrete. This solution provides a High-durability concrete, adopting this scheme, improves the sulfate erosion resistance, crack resistance and chloride ion penetration resistance of concrete through the preparation of the combination ratio of conc...

Embodiment 2

[0034] Embodiment 2 is further optimized on the basis of Embodiment 1, and a specific implementation manner is provided.

[0035] 1. Mass concrete design

[0036] The thickness of the floor is 1.8m, the thickness of the shear wall is 1m, 2m, 3m, the thickness of the roof is 2.5m, 2.8m, 3.0m, the concrete is grade C45P10, and the construction technology of pumping concrete is adopted. The mass concrete of this project uses the 60-day post-strength of concrete as the basis for concrete design, strength evaluation and acceptance.

[0037] 1.1. Durability design

[0038] 1) The maximum water-binder ratio of concrete is 0.40, and the minimum amount of cementitious material is 340kg / m3 / . Ⅲ; Anti-carbonization performance level T-Ⅳ;

[0039] 2) Portland cement and ordinary Portland cement should be used for concrete, and its strength grade should not be lower than No. 42.5; when other types of cement are used, it should be determined through experiments, and high-hydration concret...

Embodiment 3

[0069] Embodiment 3 is further optimized on the basis of Embodiment 2.

[0070] Regarding the curing of concrete, the curing of concrete is one of the key steps in concrete construction. For high-performance concrete, due to the small water-binder ratio, the amount of bleeding after pouring is very small. When the moisture lost by evaporation on the concrete surface is not fully replenished, the plastic shrinkage of the concrete is intensified. At this time, the concrete does not yet have the strength required to resist deformation, which easily leads to the generation of plastic shrinkage cracks, affecting durability and strength. In addition, the amount of high-performance concrete cementitious material is large, and the hydration temperature rises, which leads to increased self-shrinkage and temperature stress. For high-performance concrete with high fluidity, due to the large amount of cementitious material, large When molding to the component, it will cause a large propo...

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Abstract

The invention discloses high-durability concrete, and relates to the technical field of building engineering construction, and each cubic meter of the concrete comprises the following raw materials: 273-293 kg / m < 3 > of cement, 340-450 kg / m < 3 > of a cementing material, 703-710 kg / m < 3 > of sand, 1064-1099 kg / m < 3 > of stone, 9.66-10.35 kg / m < 3 > of an additive, 0.9-1.2 kg / m < 3 > of polypropylene fiber and the balance of water. The cementing material comprises 105-113kg / m < 3 > of fly ash, 42-45kg / m < 3 > of S95 mineral powder and 29-32kg / m < 3 > of a waterproof agent; according to the scheme, the sulfate corrosion resistance, the early-stage crack resistance and the chloride ion penetration resistance of the concrete are improved by preparing the concrete combination proportion, and the durability of the concrete is enhanced.

Description

technical field [0001] The invention relates to the technical field of building engineering construction, in particular to a high-durability concrete. Background technique [0002] According to the hydrogeological data of the Sichuan area and the storage conditions of the groundwater, there are two main types of groundwater, one is the stagnant water in the upper layer attached to the soil filling layer, and the other is the fissure water in the bedrock; the stagnant water in the upper layer is in the shape of a lens Distributed on the surface of the earth, it is stored in the surface fill layer, atmospheric precipitation and the domestic water of nearby residents are its main supply sources, and the water volume changes greatly and is unstable. The bedrock fissure water is groundwater. The flow of groundwater will dissolve the contained gypsum, and form a network of weathered zone dissolution pores and dissolution pores along the dissolution pores or fissures, creating good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/20C04B111/34
CPCC04B28/04C04B2111/20C04B2111/343C04B2201/50C04B18/08C04B18/141C04B2103/65C04B14/02C04B14/06C04B16/0633C04B2103/302
Inventor 赵崇贤谢勇邹明君辛朝刚周俊叶光荣
Owner 中国华西企业股份有限公司
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