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A kind of high strength and high toughness polyurethane concrete and preparation method and application

A high-strength and high-toughness technology of polyurethane concrete, which can be applied to cohesive pavements, roads, buildings, etc. on site, and can solve problems such as poor low-temperature impact resistance and water resistance, low tensile strength and toughness, and high cement content. Achieve the effects of improving water resistance, reducing viscosity, and reducing air bubbles

Active Publication Date: 2022-07-22
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing polyurethane concrete still has high cement content, low tensile strength and toughness, low temperature impact resistance and poor water resistance, and to provide a high-strength and high-toughness polyurethane concrete and its preparation method and application

Method used

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  • A kind of high strength and high toughness polyurethane concrete and preparation method and application
  • A kind of high strength and high toughness polyurethane concrete and preparation method and application

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specific Embodiment approach 1

[0029] Specific embodiment 1: In this embodiment, a high-strength and high-tough polyurethane concrete is composed of 100 parts by weight of polyisocyanate, 100 parts of oligomer polyol, 10-15 parts of chain extender, 2-3 parts of catalyst, 7- 8 parts of molecular sieve activation powder, 6 to 8 parts of silicone, 120 to 200 parts of fly ash, 140 to 160 parts of fine aggregate, 300 to 320 parts of coarse aggregate, 5 to 10 parts of carbon fiber powder and 20 parts of ~40 parts of chitosan are prepared by grafting hyperbranched polymer on the surface.

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the oligomer polyol is aliphatic amino-terminated polyether; the aliphatic amino-terminated polyether is polyetheramine D-2000, One or more mixtures of polyetheramine T-3000 and polyetheramine T-5000; the polyisocyanate is polymethylene polyphenyl isocyanate or diphenylmethane diisocyanate. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the fly ash is first-grade fly ash, and the fineness is 300 mesh to 400 mesh; the fine aggregate is Natural river sand, the main component is granite, the maximum particle size is 2.5mm, the minimum particle size is 0.16mm, using continuous gradation; the coarse aggregate is granite or basalt, the maximum particle size is 4.75mm, and the minimum particle size is 5mm, using continuous gradation, does not contain needle-like particles. Other steps are the same as in the first or second embodiment.

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Abstract

A high-strength and high-tough polyurethane concrete and a preparation method and application thereof belong to the field of civil engineering and transportation engineering, and particularly relate to a preparation method of polyurethane concrete. The purpose of the present invention is to solve the problems of high cement content, low tensile strength and toughness, and poor low temperature impact resistance and water resistance in the existing polyurethane concrete. A high-strength and high-tough polyurethane concrete is composed of polyisocyanate, oligomer polyol, chain extender, catalyst, molecular sieve activation powder, silicone, fly ash, fine aggregate, coarse aggregate, carbon fiber powder and It is prepared by grafting hyperbranched polymers on the surface of chitosan. A high-strength and high-toughness polyurethane concrete is used as a road pavement material and a bridge pavement material, as a fast-curing material for repairing cracks and potholes in concrete pavement, or as a reinforcing material for fast-repairing concrete houses or bridge structures. The invention can obtain a high-strength and high-tough polyurethane concrete.

Description

technical field [0001] The invention belongs to the fields of civil engineering and transportation engineering, and particularly relates to a preparation method of polyurethane concrete. Background technique [0002] As we all know, concrete material is one of the most common materials in infrastructure and one of the most widely used building materials. Traditional concrete materials generally use inorganic composite materials prepared by cement, fine aggregate (sand), coarse aggregate (stone), water and admixtures in a certain proportion. However, traditional concrete is a porous and brittle material with high compressive strength, low tensile strength, and poor impact resistance and fatigue resistance. At present, different types of fibers are used to toughen concrete and increase its tensile strength. However, fiber-reinforced concrete can lead to increased concrete density. Cement is the cementitious material of traditional concrete materials. During the production of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/16C04B24/42C04B14/38E01C7/14C04B111/40C04B111/72
CPCC04B26/16C04B24/42C04B14/386E01C7/142C04B2111/40C04B2111/72C04B2111/0075C04B2201/20C04B2201/50C04B14/048C04B14/068C04B14/02C04B18/08
Inventor 高红帅刘洪波李长平孙悦简家硕李泊辰郑熙龙
Owner HEILONGJIANG UNIV
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