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High-impedance high-impermeability concrete material and preparing method thereof

A concrete and high-impedance technology, applied in the field of material science and engineering, can solve the safety hazards of concrete structures and other problems, and achieve the effects of improving resistivity and resistance to chloride ion penetration, light weight, and high resistance to scattered current corrosion

Inactive Publication Date: 2008-08-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main durability problem faced by the concrete structure of the subway project is the corrosion of the steel bars inside the concrete caused by the stray current leaked during the operation of the subway and the chloride ions in the surrounding environment. Therefore, it will cause serious harm to the safety of concrete structures. The accidents caused by this have been reported at home and abroad. Therefore, improving the impedance and chloride ion penetration resistance of concrete is the solution to the durability of concrete structures in this type of engineering. key issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (preparation of C30 high impedance and high impermeability concrete):

[0025] A kind of preparation method of high impedance high impermeability concrete material, it comprises the steps:

[0026] 1). Select raw materials according to Table 1;

[0027] Table 1

[0028] The amount of various raw materials per square concrete (Kg / m 3 )

cement

Mineral doping

Mixture

pebbles

river sand

Shale pottery

the sand

polymer

Admixture

water

315

135

930.2

425.9

99.68

3.15

4.5

202

[0029] The cement is 32.5 grade ordinary Portland cement; the mineral admixture is secondary fly ash; the stone is 5-25cm continuous collection of limestone; the river sand fineness modulus is 2.6; the polymer is German Wacker glue powder; the admixture is Kao Maidi 150 high-efficiency superplasticizer; the light ag...

Embodiment 2

[0031] Embodiment 2 (preparation of C50 high impedance and high impermeability concrete):

[0032] A kind of preparation method of high impedance high impermeability concrete material, it comprises the steps:

[0033] 1). Select raw materials according to Table 2;

[0034] Table 2

[0035] The amount of various raw materials per square concrete (Kg / m 3 )

[0036] The cement is 42.5 grade ordinary Portland cement; the mineral admixture is secondary fly ash; the stone is 5-25cm continuous collection of limestone; the river sand fineness modulus is 2.6; the polymer is German Wacker glue powder; the admixture is Kao Maidi 150 high-efficiency superplasticizer; the light aggregate is shale pottery sand.

Embodiment 3

[0038] A kind of preparation method of high impedance high impermeability concrete material, it comprises the steps:

[0039] 1). Select raw materials according to Table 3;

[0040] table 3

[0041] The amount of various raw materials per square concrete (Kg / m 3 )

cement

Mineral doping

Mixture

pebbles

river sand

Shale pottery

the sand

polymer

Admixture

water

371

111.3

985.4

460.8

100

2.41

4.82

160

[0042] The cement is: 42.5 ordinary Portland cement; the sand is: river sand with a fineness modulus of 2.7; the stone is: continuous graded limestone with a particle size of 5-25 mm; The material is: polyvinyl alcohol 1788; the mineral admixture is: secondary fly ash; the admixture is Kao Maidi 150 Nai series high-efficiency water reducer; the light aggregate is a particle size of 2.5 mm of shale pottery...

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Abstract

The invention relates to concrete material of high impedance and high anti-permeability and a preparation method thereof. The concrete material of high impedance and high anti-permeability is characterized in that the material is prepared by mixing and stirring raw materials of cement, lightweight aggregate, pebble, sand, polymer, mineral admixture, admixture and water; wherein, proportion of the cement, lightweight aggregate, pebble, polymer and mineral admixture is: 315-500kg / m<3> of the cement, 60-100kg / m<3> of the lightweight aggregate, 900-1,100kg / m<3> of the pebble, 2.0-5kg / m<3> of the polymer and 40-135kg / m<3> of the mineral admixture; addition amount of the admixture is 0.6-1 percent of weight of cementing material; volume rate of the sand is 38-40 percent; water cement ration is 0.3-0.5; the lightweight aggregate is shale pottery with a particle size of 0.05-2.5mm. The concrete material prepared by the method has high impedance and high chloride ion penetration resistant capacity.

Description

technical field [0001] The invention belongs to the field of material science and engineering, and in particular relates to a high-resistance and high-impermeability concrete material and a preparation method thereof. Background technique [0002] With the rapid development of my country's national economy and the continuous improvement of urbanization level, as well as the increasing shortage of land resources, large-scale development and utilization of underground space for infrastructure construction is an inevitable trend. It is proposed internationally that "the 21st century is the era of human development and utilization of underground space". The development and utilization of underground space and the development of underground transportation system can improve urban traffic congestion and residents' living environment. At present, large-scale underground transportation projects such as subways are being built in major cities in my country. Due to the huge investmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/04
Inventor 胡曙光丁庆军耿健吴雄丁华涛
Owner WUHAN UNIV OF TECH
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