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Anti-crack, anti-permeability and high-durability concrete and preparation method thereof

A durable concrete, anti-penetration technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. The ability of conduction to dissipate the heat of hydration, the effect of improving thermal conductivity, good economy and practicality

Active Publication Date: 2019-02-01
衢州鑫业建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For concrete used in various projects, the main problem at present is that the indicators such as compressive strength are easy to achieve, and the durability indicators such as high toughness, crack resistance, and penetration resistance are difficult to achieve.

Method used

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  • Anti-crack, anti-permeability and high-durability concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: The preparation method of C30 anti-crack and anti-permeation high durability concrete:

[0041] Step 1, put 1116 parts of gravel, 744 parts of sand, 28 parts of silicon powder, 16 parts of boron nitride powder, and 1 part of polyvinyl alcohol fiber into the mixer according to the number of parts by mass, and stir to make them fully mixed;

[0042] Step 2, adding 288 parts of cement, 32 parts of fly ash, 24 parts of coal gangue powder and 12 parts of phosphorous slag powder into the mixture of step 1 in order to make it evenly mixed according to the number of parts by mass;

[0043] Step 3: Mix 4 parts of dispersing activator, 7 parts of water reducing agent, 40 parts of modified graphene oxide dispersion liquid and 117 parts of water according to parts by mass and stir to obtain a mixture;

[0044] Step 4, under stirring, gradually add the mixture prepared in Step 3 to the mixture prepared in Step 2 and stir to obtain crack-resistant, permeable and high-durab...

Embodiment 2

[0064] Example 2: The preparation method of C40 anti-crack and anti-permeation high durability concrete:

[0065] Step 1, put 1122 parts of gravel, 687 parts of sand, 31 parts of silicon powder, 18 parts of boron nitride powder, and 1.1 parts of polyvinyl alcohol fiber into the mixer according to the number of parts by mass and stir to make them fully mixed;

[0066] Step 2, adding 321 parts of cement, 36 parts of fly ash, 27 parts of coal gangue powder and 13 parts of phosphorous slag powder into the mixture of step 1 in order to make it evenly mixed according to the number of parts by mass;

[0067] Step 3: Mix 4.5 parts of dispersing activator, 7.8 parts of water reducing agent, 44.7 parts of modified graphene oxide dispersion and 111.5 parts of water in parts by mass and stir to obtain a mixture;

[0068] Step 4, under stirring, gradually add the mixture prepared in Step 3 to the mixture prepared in Step 2 and stir to obtain crack-resistant, permeable and high-durability c...

Embodiment 3

[0070] Embodiment 3: The preparation method of C50 anti-crack and anti-permeation high durability concrete:

[0071] Step 1, put 1118 parts of gravel, 700 parts of sand, 30 parts of silicon powder, 17 parts of boron nitride powder, and 1.2 parts of polyvinyl alcohol fiber into the mixer according to the number of parts by mass, and stir to make them fully mixed evenly;

[0072] Step 2, adding 305 parts of cement, 34 parts of fly ash, 25.5 parts of coal gangue powder and 12.5 parts of phosphorus slag powder into the mixture of step 1 in order to make it evenly mixed according to the number of parts by mass;

[0073] Step 3: Mix 4.2 parts of dispersing activator, 8 parts of water reducer, 50 parts of modified graphene oxide dispersion and 110 parts of water in parts by mass and stir to obtain a mixture;

[0074] Step 4, under stirring, gradually add the mixture prepared in Step 3 to the mixture prepared in Step 2 and stir to obtain crack-resistant, permeable and high-durability ...

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Abstract

Provided are anti-crack, anti-permeability and high-durability concrete and a preparation method thereof; the concrete is prepared from cement, silica powder, boron nitride powder, sand, polyvinyl alcohol fibers, crushed stone, fly ash, coal gangue powder, phosphorus slag powder, a water reducing agent, a dispersing activator, a modified graphene oxide dispersion liquid and water. The thermal conductivity coefficients of the obtained concrete at 1 h and 28 days of age is 2.62-3.23 W / (m*K) and 3.53-4.35 W / (m*K) respectively, the compressive strength at 28 days of age is 38.7-57.6 MPa, the breaking strength is 13.3-14.6 MPa, the splitting tensile strength is 8.4-9.7 MPa, the bending-tensile strength is 7.3-9.0 MPa and the bending-tensile elasticity modulus is 28.7-33.4 GPa. Meanwhile, all the water permeability resistance, chloride ion permeability resistance, freeze-thaw resistance and carbonization resistance reach the best level. The concrete has high workability, high volume stability and abilities of high durability, high toughness, high crack resistance and high permeability resistance, and is suitable for the requirements of ordinary high performance concrete under various complex environmental conditions.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a crack-resistant, seepage-resistant, high-durability concrete and a preparation method thereof. Background technique [0002] Anti-crack, anti-permeation, high durability, ordinary high-performance concrete refers to high-performance concrete with a strength of C30-C50. High-performance concrete refers to concrete with high workability, high volume stability and high durability. High workability means good fluidity and construction performance. High volume stability means that its volume shrinkage and expansion are small. No cracks and leaks, high durability means a long service life, strong resistance to cracks and penetration. Therefore, high workability, high volume stability and high durability jointly determine the high performance of concrete. [0003] Concrete is a structural material used to build various buildings, roads and bridges, tunnels, airports, hy...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/20C04B111/27C04B111/34
CPCC04B28/04C04B2111/27C04B2111/343C04B2111/20C04B2201/50C04B2201/32C04B2111/00293C04B14/06C04B18/146C04B14/327C04B16/0641C04B18/08C04B18/12C04B18/0427C04B14/024C04B14/048C04B14/14C04B24/04C04B24/12C04B24/283C04B22/142C04B24/122C04B24/06C04B2103/302Y02W30/91
Inventor 吕生华习海涛刘锦茹
Owner 衢州鑫业建材有限公司
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