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A kind of anti-crack anti-penetration high durability concrete and its preparation method

A durable concrete and anti-penetration technology, which is applied in the field of building materials, can solve the problems of impermeability, crack resistance and durability, brittleness and cracks affecting the safety of concrete structures, and poor durability, so as to achieve good workability and durability. Volume stability, improvement of volume stability, and effect of anti-corrosion performance

Active Publication Date: 2021-03-19
CHONGQING YABO BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance design of high-performance concrete mainly includes strength such as compressive strength, flexural strength, split tensile strength, bending tensile strength and durability evaluation such as anti-permeation, freeze-thaw resistance, and carbonation resistance. In actual engineering, it is often Taking strength as the main design and evaluation index, it is difficult to realize the impermeability, crack resistance and durability requirements of high-performance concrete, which leads to poor durability of current concrete buildings and projects, cracks, Leakage and other problems are relatively prominent, and the reinforcement and maintenance of these concrete structures cost a lot of money every year. At the same time, due to the brittleness and cracks of concrete, construction, road and bridge collapse accidents occur from time to time. The brittleness and cracks of concrete have seriously affected the safety of the use of concrete structures.

Method used

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  • A kind of anti-crack anti-penetration high durability concrete and its preparation method
  • A kind of anti-crack anti-penetration high durability concrete and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Preparation method of C60 anti-crack, anti-permeation and high durability concrete

[0041] Step 1, put 1120 parts of gravel, 686 parts of sand, 32 parts of silicon powder, 19 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;

[0042] Step 2: 336 parts of cement, 37 parts of fly ash, 28 parts of coal gangue powder and 14 parts of phosphorous slag powder are sequentially added to the mixture of step 1 and stirred to make it evenly mixed according to the number of parts by mass;

[0043] Step 3: Mix 4.7 parts of dispersing activator, 9.3 parts of water reducing agent, 65.2 parts of modified graphene oxide dispersion and 108.7 parts of water in 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 ...

Embodiment 2

[0064] Example 2: Preparation method of C70 anti-crack, anti-permeation and high durability concrete

[0065] Step 1, put 1110 parts of gravel, 651 parts of sand, 33 parts of silicon powder, 19 parts of boron nitride powder, and 1.3 parts of polyvinyl alcohol fiber into the mixer according to the number of parts by mass, and stir to make them fully mixed evenly;

[0066] In step 2, 343 parts of cement, 38 parts of fly ash, 29 parts of coal gangue powder and 14 parts of phosphorus slag powder are sequentially added to the mixture of step 1 and stirred to make it evenly mixed in parts by mass;

[0067] Step 3: Mix 4.8 parts of dispersing activator, 9.5 parts of water reducer, 76.2 parts of modified graphene oxide dispersion and 89.2 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 concrete. ...

Embodiment 3

[0070] Example 3: Preparation method of C80 anti-crack, anti-permeation and high durability concrete

[0071] Step 1, put 1105 parts of gravel, 648 parts of sand, 34 parts of silicon powder, 19.4 parts of boron nitride powder, and 1.3 parts of polyvinyl alcohol fiber into the mixer according to the number of parts by mass and stir to make them fully mixed;

[0072] Step 2: 350 parts of cement, 39 parts of fly ash, 29.2 parts of coal gangue powder and 15 parts of phosphorus slag powder are sequentially added to the mixture of step 1 and stirred to make it evenly mixed according to the number of parts by mass;

[0073] Step 3: Mix 4.9 parts of dispersing activator, 9.7 parts of water reducer, 87.5 parts of modified graphene oxide dispersion and 77.3 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-dura...

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Abstract

The invention relates to a concrete with anti-cracking, anti-seepage and high-durability effects and a preparation method thereof. The concrete is prepared from the following components of cement, flyash, silicon powder, coal gangue powder, boron nitride, phosphor residue powder, sand, crushed stone, high-strength polyvinyl alcohol fiber, a water reduction agent, a dispersing activator, a modified graphene oxide dispersion liquid and water. The concrete has the advantages that the heat conduction coefficient in the 1h age period is 2.9 to 3.7W / (m.K), the heat conduction coefficient in the 28-day age period is 3.5 to 4.7W / (m.K), the compressive strength is 67.6 to 98.3MPa, the break strength is 13.3 to 16.8MPa, the split strength is 9.3 to 9.8MPa, the tensile strength is 8.3 to 10.7MPa, and the tensile elastic modulus is 44.5 to 51.4GPa; the anti-water permeation property, anti-chlorine ion permeation property, anti-freezing and thawing property, and anti-carbonizing property can reachthe highest level; the working property is high, the volume stability is high, the durability is high, the toughness is high, the anti-cracking ability is high, and the anti-seepage ability is high.

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] Crack-resistant, permeation-resistant, high-durability high-performance concrete with a strength grade of C60-C90 is mainly used in various high-rise buildings and high-grade road projects such as long-span bridges, bridge piers, tunnels, hydropower dams, airport runways, military and nuclear power facilities, etc. In the field of engineering, it is the high-performance concrete that is urgently needed in various projects. 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 is has a very long service lif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B24/26C08F283/06C08F220/06C08F220/46C08F292/00C08F226/06C08F220/20
CPCC04B24/2694C04B28/04C04B2111/00293C04B2201/32C04B2201/50C08F283/065C08F292/00C04B14/02C04B14/06C04B14/327C04B16/0641C04B18/08C04B18/12C04B18/0481C04B14/024C04B2103/302C08F220/06C08F220/20C08F226/06
Inventor 吕生华习海涛高党国刘锦茹
Owner CHONGQING YABO BUILDING MATERIALS CO LTD
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