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Concrete and concrete components with resistance to sulfate and chloride corrosion

A sulfate-resistant concrete technology, which is applied in the field of buildings or concrete components, can solve problems such as difficult quality control, high cost, and unstable product performance, and achieve reasonable proportioning, reduced difficulty, and resistance to sulfate and chloride salts. powerful effect

Active Publication Date: 2017-11-17
JIANGSU DONGPU PILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are many kinds of existing anti-corrosion concrete, which are mainly achieved by adding a variety of anti-corrosion additives or increasing the amount of gel. The more raw materials, the more difficult the quality control, the unstable performance of the product, and the cost of the existing solutions is also correspondingly compared high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1a

[0058] Cement 275kg / m 3 , fly ash 92kg / m 3 , sand 678kg / m 3 , stone 1203kg / m 3 , water 147kg / m 3 , water reducing agent 1.2%, air entraining agent 0.01%.

[0059] The experimental data are as follows: the compressive strength is 42.8MPa, the tensile strength is 3.25MPa, the impermeability performance parameter is 40mm, the frost resistance performance parameter is 0.52%, the sulfate resistance performance parameter is 79%, and the chloride salt resistance performance parameter is 4.20 and 877.

Embodiment 1b

[0061] Cement 321kg / m 3 , fly ash 82kg / m 3 , sand 675kg / m 3 , stone 1152kg / m 3 , water 145kg / m 3 , water reducing agent 1.2%, air entraining agent 0.01%.

[0062] The experimental data are as follows: the compressive strength is 46.5MPa, the tensile strength is 3.42MPa, the impermeability performance parameter is 45mm, the frost resistance performance parameter is 2.35%, the sulfate resistance performance parameter is 81%, and the chloride salt resistance performance parameter is 3.52 and 744.

Embodiment 1c

[0064] Cement 384kg / m 3 , fly ash 67 kg / m 3 , sand 643 kg / m 3 , stone 1140 kg / m 3 , water 145kg / m 3 , water reducing agent 1.2%, air entraining agent 0.01%.

[0065] The experimental data are as follows: the compressive strength is 37.2 MPa, the tensile strength is 2.84 MPa, the impermeability performance parameter is 35mm, the frost resistance performance parameter is 1.86%, the sulfate resistance performance parameter is 80%, and the chloride salt resistance performance parameter is 3.57 and 787.

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PUM

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Abstract

The invention discloses concrete having the performance of resisting invasion of sulfates and chlorides and a concrete member. The concrete includes the following components: 368-453 kg / m<3> of a cementing material, 621-677 kg / m<3> of sand, 1142-1201 kg / m<3> of stone, 143-149 kg / m<3> of water, 1.2-1.8% of a water reducer, 0.01-0.02% of an air entraining agent and 0-8.4% of an corrosion resistant agent, wherein the percentage ratio refers to the mass ratio of the water reducer, the air entraining agent and the corrosion resistant agent to the cementing material, and the cementing material includes at least one of cement, mineral slag and fly ash and the corrosion resistant agent. The concrete is reasonable in proportion, is strong in the performance of resisting sulfates and chlorides, is reduced in blending difficulty, is high in quality controllability and is reduced in cost.

Description

technical field [0001] The present invention relates to buildings or concrete elements, such as pipe piles, in particular to a sulfate and chloride resistant concrete and concrete elements. Background technique [0002] In saline areas, such as coastal and salt lake areas, the soil is rich in sulfates and chlorides, which will corrode concrete and the steel bars in concrete, affecting its durability. [0003] At present, high-strength pipe piles are widely used in engineering foundations. Considering the corrosion effect of saline-alkali environment, the current code does not allow the use of open pipe piles in strong corrosion environments, and closed pile tips should be used. The measure of long core filling can improve the anti-corrosion performance, but the measure of long core filling increases the construction process of pipe pile foundation, and sometimes there are construction quality problems. [0004] There are many kinds of existing anti-corrosion concrete, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B14/06C04B22/14C04B22/08C04B22/06
Inventor 颜成华钱文勋李世歌霍永业陈迅捷韦华李果王晓军王强周
Owner JIANGSU DONGPU PILE