Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof

A mortar concrete, ultra-high toughness technology, used in solid waste management, climate sustainability, sustainable waste treatment, etc. problems, to achieve the effect of improving product competitiveness, reducing material costs, and ensuring time windows

Active Publication Date: 2020-07-03
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of low early strength, mismatch between elastic modulus and toughness, and insufficient flexibility of existing ultra-high toughness concrete, this invention develops a concrete with high strength, low elastic modulus, low shrinkage, excellent flexibility, and can meet various construction methods. Ultra-high toughness mortar concrete

Method used

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  • Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof
  • Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof
  • Low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A kind of mortar concrete of the present invention, its proportioning is as follows:

[0062] Aluminate cement: 45%

[0063] Natural rubber powder: 10%

[0064] Aggregate: 30%

[0065] Silicone powder defoamer: 0.01%

[0066] Cellulose ether thickener: 0.01%

[0067] Borax coagulant: 0.30%

[0068] Polycarboxylate superplasticizer: 0.50%

[0069] Calcium oxide anti-crack and shrinkage reducer: 5.00%

[0070] The remainder is water;

[0071] The particle size of the natural rubber powder is 100 mesh, the shape of the particle is spherical, and the continuity of the particle size satisfies the normal distribution; the surface of the rubber powder is untreated.

[0072] The mortar concrete is mixed with fiber: polyoxymethylene fiber 40kg / m 3 , wherein the fiber dosage of 30 microns in diameter and 6 mm in length is 25 kg, tensile strength: 1500 MPa, modulus of elasticity: 30 GPa; balance is 300 microns in diameter, 15 mm in length, tensile strength: 940 MPa, modulu...

Embodiment 2

[0075] A kind of mortar concrete of the present invention, its proportioning is as follows:

[0076] Sulphoaluminate cement: 55%

[0077] Butadiene rubber powder: 30%

[0078] Aggregate: 15%

[0079] Polyether powder defoamer: 0.06%

[0080] Cellulose ether thickener: 1.0%

[0081] Borax coagulant: 2.00%

[0082] Polycarboxylate powder superplasticizer: 0.10%

[0083] Calcium oxide anti-crack and shrinkage reducer: 10.00%

[0084] The remainder is water;

[0085] The equivalent particle size of the butadiene rubber powder is 20 meshes, and the shape of the particles is irregular, and the continuity of the particle size satisfies a normal distribution; the surface of the rubber powder is untreated.

[0086] The mortar concrete is mixed with fiber: polyvinyl alcohol fiber 10kg / m 3 , diameter: 30 microns; length: 6 mm, tensile strength: 1600MPa, modulus of elasticity: 40GPa;

[0087] Accurately measure the above-mentioned materials and add them to the dry powder mortar a...

Embodiment 3

[0089] A kind of mortar concrete of the present invention, its proportioning is as follows:

[0090] Aluminate cement: 50.00%

[0091] SBR powder: 1.00%

[0092] Aggregate: 30.00%

[0093] Silicone powder defoamer: 0.03%

[0094] Cellulose ether thickener: 0.05%

[0095] Borate coagulant: 1.00%

[0096] Polycarboxylate superplasticizer: 0.25%

[0097] Calcium oxide anti-crack and shrinkage reducer: 1.0%

[0098] The remainder is water;

[0099] The equivalent particle size of the styrene-butadiene rubber powder is 500 mesh, and the particle shape is irregular, and the continuity of the particle size satisfies a normal distribution; the surface of the rubber powder is treated with a surface modifier after activation.

[0100] The mortar concrete is mixed with fibers: polyvinyl alcohol fibers and polyoxymethylene fibers are 20 and 12 kg / m respectively 3 , wherein polyvinyl alcohol fiber diameter: 40 microns; length: 8 mm, tensile strength: 1540 MPa, elastic modulus: 40 G...

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Abstract

The invention discloses a low-elastic-modulus flexible ultrahigh-toughness mortar concrete system and a preparation method thereof. The low-elastic-modulus flexible ultrahigh-toughness mortar concretesystem is prepared from aluminate cement, rubber powder, aggregate, a powder defoaming agent, a thickening agent, an adjusting admixture, a high-efficiency water reducing agent, an anti-cracking shrinkage reducing agent, water and fibers. Through optimization of all the components, adjustment of the characteristics of early strength, multi-seam cracking, rigidity and softness, noise reduction andenergy absorption and the like can be achieved, and the obtained low-elastic-modulus flexible ultrahigh-toughness mortar concrete system can meet the requirements for toughening, crack resistance, collision prevention, energy absorption and the like of conventional constructional engineering, roads and military engineering.

Description

technical field [0001] The invention relates to the field of fiber-reinforced mortar concrete, in particular to a low elastic modulus flexible ultra-high toughness mortar concrete system and a preparation method thereof. Background technique [0002] The rapid construction of projects and the emergency repair and restoration of engineering facilities are important guarantees for improving efficiency and ensuring project safety, and rapid repair materials are the key to realizing emergency repair and construction. At the same time, they are required to have rapid opening, efficient construction, high toughness, strong bonding and low shrinkage. characteristic. In addition, some building structures should have the function of anti-collision and energy absorption under the premise of toughness. Low elastic modulus flexible ultra-high toughness concrete has excellent properties such as strain hardening characteristics, excellent crack control ability, and excellent freeze-thaw ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/50
CPCC04B28/06C04B2201/50C04B2111/50C04B14/02C04B24/42C04B24/383C04B22/0013C04B22/064C04B16/0675C04B2103/302C04B18/22C04B16/0641C04B24/32Y02W30/91
Inventor 阳知乾刘建忠刘加平沙建芳韩方玉郭飞吕进
Owner JIANGSU SOBUTE NEW MATERIALS
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