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Corrosion-resisting high-performance concrete suitable for sewage works and its preparation method

A sewage engineering and concrete technology, which is applied in the field of sewage corrosion-resistant high-performance concrete and its preparation, can solve the problems of concrete cracking damage, dissolution type damage, complex reaction, etc., and achieve the effect of prolonging life

Active Publication Date: 2007-04-11
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2. Dissolving damage
[0011] 3. Corrosion of steel bars in concrete causes concrete cracking and damage
Moreover, the participation of microorganisms makes the above reactions more complicated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Embodiments of the present invention are described below.

[0031] 1. Proportion and production of concrete

[0032] The weight ratio of various cementitious materials in C40 corrosion-resistant high-performance concrete is as follows:

[0033] 52.5P II cement: 27.3% to 32.1%, mineral admixture: 72.7% to 67.9%. Among mineral admixtures, slag powder (S95): 40% to 58%, ground fly ash: 39% to 47%, mineral additive (JEA): 0% to 8%, and water reducer (RH1100) It is 0.8% to 1.2% of the weight of the mineral admixture.

[0034] According to the aforementioned preparation steps, various materials are stirred and mixed, and then poured.

[0035] 2. Properties of concrete

[0036] Concrete workability: It meets the technical requirements for the production of ready-mixed pumped concrete in the concrete batching plant.

[0037] Concrete preparation strength (28d standard culture): greater than 45MPa.

[0038] 3. Concrete maintenance

[0039] According to the current technic...

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PUM

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Abstract

The invention belongs to technical field of construction materials, specifically it relates to a corrosion-resisting high-performance concrete and the method for preparation. Concrete mentioned in this invention is made of aggregate, water, cement, scoria powder, high grade fly ash, high-powered mineral additive and water reducing agent according to proper weight ratio. The corrosion-resisting high-performance concrete satisfies the requirement of sewage-project environmental design and construction in three performances of casting durability, intensity, and casting performance, which makes sure that the concrete project structure can be used in a long term and safely.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a sewage corrosion-resistant high-performance concrete and a preparation method thereof. Background technique [0002] At present, the following two major methods are mainly used in the treatment of concrete sewage at home and abroad to improve the resistance of concrete to the corrosion of aggressive media: [0003] ① Spray water-based polymer cement mortar on the concrete surface to improve corrosion resistance. [0004] ② Coating the concrete surface with polyurethane anti-corrosion paint and coating the steel surface with cross-linked high-chlorinated polyethylene anti-corrosion paint improves the corrosion resistance of concrete and steel structures in sewage works. [0005] The above method has the problems of high cost and troublesome construction. Contemporary high-performance concrete technology (i.e. the concrete technology that can ensure the lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/08C04B18/12
CPCY02W30/91
Inventor 张荫济王国华陆嘉竑陈嫣
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP