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High-toughness, high-impermeability and high-durability concrete and preparation method thereof

A durable concrete and high-toughness technology, applied in the field of building materials, can solve the problems that the durability indicators such as flexural strength, splitting tensile strength, flexural tensile strength and anti-penetration are difficult to improve, and the compressive strength is easy to achieve. The effect of hydration product structure, elimination of micro-cracks, and improvement of thermal conductivity

Pending Publication Date: 2019-01-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem at present is still that the compressive strength is easy to achieve, but the durability indicators such as flexural strength, splitting tensile strength, flexural tensile strength, cracks, and penetration resistance are difficult to improve.

Method used

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  • High-toughness, high-impermeability and high-durability concrete and preparation method thereof
  • High-toughness, high-impermeability and high-durability concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Preparation method of C100 high toughness, high impermeability and high durability concrete

[0042] Step 1, put 1030 parts of gravel, 579 parts of sand, 37 parts of silicon powder, 26.8 parts of boron nitride powder, 0.3 parts of low-degree graphene oxide sheet powder, and 1.4 parts of high-strength polyvinyl alcohol fiber into the Put it into the mixer to make it fully mixed;

[0043] Step 2: Add 385 parts of cement, 32 parts of fly ash, 43 parts of steel slag powder and 16 parts of phosphorus slag powder into the mixing of step 1 in order to make it evenly mixed according to the number of parts by mass;

[0044] Step 3: Mix 8.0 parts of dispersing activator, 13.4 parts of water reducer, 107.2 parts of modified graphene oxide dispersion and 59.2, 54.5, 55.4 parts of water in parts by mass and stir to obtain a mixture;

[0045] Step 4: Slowly add the mixture prepared in Step 3 to the mixture prepared in Step 2 under stirring to obtain high-toughness, high-i...

Embodiment 2

[0066] Example 2: Preparation method of C110 high toughness, high impermeability and high durability concrete

[0067] Step 1, put 1010 parts of gravel, 544 parts of sand, 38 parts of silicon powder, 27 parts of boron nitride powder, 0.5 part of low-degree graphene oxide sheet powder, and 1.4 parts of high-strength polyvinyl alcohol fiber into the Put it into the mixer to make it fully mixed;

[0068] Step 2: Add 393 parts of cement, 33 parts of fly ash, 45 parts of steel slag powder and 17 parts of phosphorous slag powder into the mixing of step 1 in order to make it evenly mixed according to the number of parts by mass;

[0069] Step 3: Mix 8.2 parts of dispersing activator, 13.7 parts of water reducer, 109.2 parts of modified graphene oxide dispersion and 54.5 parts of water in parts by mass and stir to obtain a mixture;

[0070] Step 4: Slowly add the mixture prepared in Step 3 to the mixture prepared in Step 2 under stirring to obtain high-toughness, high-impermeability ...

Embodiment 3

[0072] Example 3: Preparation method of C120 high toughness, high impermeability and high durability concrete

[0073] Step 1, put 1000 parts of crushed stone, 539 parts of sand, 39 parts of silicon powder, 28 parts of boron nitride powder, 0.8 part of low-degree graphene oxide sheet powder, and 1.5 parts of high-strength polyvinyl alcohol fiber into the Put it into the mixer to make it fully mixed;

[0074] Step 2: Add 400 parts of cement, 34 parts of fly ash, 47 parts of steel slag powder and 18 parts of phosphorus slag powder into the mixing of step 1 in order to make it evenly mixed according to the number of parts by mass;

[0075] Step 3: Mix 8.3 parts of dispersing activator, 13.9 parts of water reducer, 111.2 parts of modified graphene oxide dispersion and 55.4 parts of water in parts by mass and stir to obtain a mixture;

[0076] Step 4: Slowly add the mixture prepared in Step 3 to the mixture prepared in Step 2 under stirring to obtain high-toughness, high-impermeab...

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Abstract

The invention discloses high-toughness, high-impermeability and high-durability concrete and a preparation method thereof. The concrete is prepared from cement, coal ash, silicon powder, steel slag powder, boron nitride, low-alcohol graphene oxide sheet powder, phosphorus slag powder, sand, gravels, high-intensity polyvinyl alcohol fibers, a water reducing agent, a dispersive activator, modified graphene oxide dispersion liquid and water. The prepared concrete has a heat conduction coefficient of 3.46 to 4.32 W / (m.K) in the age of 1 hour, and has a heat conduction coefficient of 4.83 to 5.54 W / (m.K), the compressive strength of 106.8 to 127.5 MPa, the breaking strength of 17.3 to 19.8 MPa, the splitting tensile strength of 10.7 to 11.8 MPa, the bending strength of 11.2 to 12.7 MPa and an anti-bending elastic modulus of 52.6 to 57.6 GPa in the age of 28 days; meanwhile, the water impermeability, the chloride ion impermeability, the freeze-thawing property and the carbonization resistance of the concrete are at the best level.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-toughness, high-impermeability, and high-durability concrete and a preparation method thereof. Background technique [0002] High-performance concrete with high toughness, high impermeability and high durability refers to high-performance concrete with a strength of C100-C150. This grade of concrete is mainly used in various high-rise buildings and high-grade road projects such as bridges, bridge piers, tunnels and hydroelectric power plants. Dams, airport runways, port terminals, offshore engineering, military facilities and nuclear power construction, etc., are the concrete that is urgently needed and under research and development in various engineering constructions. 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 st...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/27
CPCC04B28/04C04B2111/27C04B2201/32C04B2201/50C04B18/146C04B18/142C04B14/327C04B14/024C04B14/06C04B14/02C04B16/0641C04B2103/302C04B2103/408
Inventor 刘锦茹吕生华习海涛胡浩岩
Owner SHAANXI UNIV OF SCI & TECH
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