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High-toughness cement-based composite material for injection and preparation method thereof

A composite material and cement-based technology, applied in the field of building materials, can solve the problems of restricting the spray application of high-toughness cement-based composite materials, poor spray surface flatness, nozzle blockage, etc., to improve various properties, strong applicability, and properties uniform effect

Inactive Publication Date: 2020-01-31
CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high-toughness composite cement-based composite material has complex components, and various fibers are mixed in it, so that there are problems such as nozzle clogging, poor spray surface flatness, and high rebound rate when spraying high-toughness cement-based composite materials, which restricts high-strength cement-based composite materials. Spray application of ductile cement-based composites

Method used

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  • High-toughness cement-based composite material for injection and preparation method thereof
  • High-toughness cement-based composite material for injection and preparation method thereof
  • High-toughness cement-based composite material for injection and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this example, the components of a high-toughness cement-based composite material for spraying include P.O42.5 ordinary Portland cement, sulphoaluminate cement, quartz stone powder, fly ash, styrene-butadiene emulsion, carboxymethyl cellulose , water reducer, thixotropic agent, defoamer, polyvinyl alcohol fiber, the mass ratio of raw materials is P.O42.5 ordinary Portland cement: sulfoaluminate cement: quartz stone powder: fly ash: styrene-butadiene emulsion : carboxymethyl cellulose: water reducer: thixotropic agent: defoamer: water = 27%: 3%: 17%: 35%: 1.69%: 0.007%: 0.3%: 0.008%: 0.009%: 15% According to the rheology of mortar (T=24±1°C, 60%, SL / SR=0.52), the fiber content is determined to be 3.0% of the total volume of the high-toughness cement-based composite material. The polyvinyl alcohol fiber has a length of 13 mm, a diameter of 37 μm, a tensile strength of 1550 MPa, an elastic modulus of 42.0 GPa, and an ultimate elongation of 7%.

[0028] Described prepara...

Embodiment 2

[0032] The component of a kind of high-toughness cement-based composite material for spraying in this example comprises P.O42.5 ordinary portland cement, sulphoaluminate cement, quartz stone powder, metakaolin, styrene-butadiene emulsion, carboxymethyl cellulose, Water reducer, thixotropic agent, defoamer, polyvinyl alcohol fiber, the mass ratio of raw materials is P.O42.5 Ordinary Portland cement: Sulphoaluminate cement: Quartz powder: Metakaolin: Butadiene styrene emulsion: Carboxylic acid Methyl cellulose: water reducer: thixotropic agent: defoamer: water = 35%: 3%: 20%: 20%: 3.59%: 0.01%: 0.4%: 0.007%: 0.01%: 18%, according to The rheological properties of the mortar (T=27±1°C, 70%, SL / SR=0.55) determined that the fiber content was 5.0% of the total volume of the high-toughness cement-based composite material. The polyvinyl alcohol fiber has a length of 13 mm, a diameter of 37 μm, a tensile strength of 1550 MPa, an elastic modulus of 42.0 GPa, and an ultimate elongation of...

Embodiment 3

[0037] The component of a kind of spraying high-toughness cement-based composite material comprises P.O42.5 ordinary Portland cement, sulphoaluminate cement, quartz stone powder, fly ash, silica fume, carboxymethyl cellulose, Water reducer, thixotropic agent, defoamer, polyvinyl alcohol fiber, glass fiber, the mass ratio of raw materials is P.O42.5 Ordinary Portland cement: Sulphoaluminate cement: Quartz powder: Fly ash, silicon Ash: carboxymethyl cellulose: water reducer: thixotropic agent: defoamer: water = 27%: 2.5%: 17%: 26%: 8%: 0.01%: 0.5%: 0.009%: 0.01%: 12 %, according to the rheological properties of mortar (T=18±1°C, 50%, SL / SR=0.35), the fiber content is determined to be 1.0% of the total volume of the high-toughness cement-based composite material, wherein the polyvinyl alcohol fiber content is 0.7%, glass fiber content is 0.3%. The length of the polyvinyl alcohol fiber is 13 mm, the diameter is 37 μm, the tensile strength is 1550 MPa, the modulus of elasticity is...

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Abstract

The invention relates to a high-toughness cement-based composite material for injection and a preparation method of the high-toughness cement-based composite material. The high-toughness cement-basedcomposite material comprises, by mass: a cementitious material system; an admixture system; a special additive system; a fine aggregate system and mixing water in the ratio of 25%-39%; 0-40%: 0.007%-7%: 15%-20%: 12%-18%, the volume content of fiber is 0.5-3% of the total volume of the composite material,according to the main technical scheme, based on the physical and chemical properties of the cement-based composite material, the rheological properties of components and slurry of the composite material are controlled, and the high-toughness cement-based composite material capable of being used for spraying is prepared through a fiber segmented dispersion technology and a slurry multi-stage mixing technology. The problems of uneven fiber dispersion, single function, low sprayability and the like of the high-toughness cement-based composite material are solved, and the method is high in applicability, continuous, efficient and capable of being widely applied to preparation of the high-toughness cement-based composite material for spraying.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-toughness cement-based composite material for spraying and a preparation method thereof. Background technique [0002] With the rapid development of the construction industry, more and more attention has been paid to shotcrete technology. Its high-efficiency working ability and excellent adaptability provide the possibility for functionalization and rapid operation under specific conditions. The high-toughness cement-based composite material has the characteristics of steady-state multi-crack cracking, which can realize the harmless treatment of cracks, solve the brittleness problem of ordinary concrete materials, and realize the rapid development of concrete. It can be widely used in bridge engineering, underground engineering, and traffic engineering. , decoration engineering and other fields. However, the high-toughness composite cement-based composite mat...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/00155C04B2201/50C04B7/02C04B14/06C04B18/08C04B24/26C04B24/383C04B16/0641C04B2103/302C04B2103/50C04B2103/0068C04B14/106C04B18/146C04B14/42
Inventor 高育欣王军杨文周建伟余保英程宝军麻鹏飞祝小靓
Owner CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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