A porous waste plastic sheet toughened cement-based composite material

A composite material and plastic sheet technology, which is applied in the field of civil engineering and construction materials, can solve the problems of obvious difference in recycling rate and poor toughness, and achieve important technical and engineering values, large ultimate tensile strain, high impact strength and resistance The effect of bending strength

Inactive Publication Date: 2021-08-20
YUNNAN MINZU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the "Report on Comprehensive Utilization of China's Resources" published by the National Development and Reform Commission in 2014, my country's consumption of plastics in 2013 was 58.79 million tons, while the recycling of waste plastics was only 13 million tons, accounting for less than 25% of the total consumption. The recycling rate of more than 60% in developed countries such as Japan, Europe and the United States is significantly different, which is far from meeting the current needs of my country in building an ecological society and supporting green development.
The mechanical failure mode of cement is brittle failure, and the toughness is extremely poor.

Method used

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  • A porous waste plastic sheet toughened cement-based composite material
  • A porous waste plastic sheet toughened cement-based composite material
  • A porous waste plastic sheet toughened cement-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: The material component ratio (mass part ratio) of this embodiment is shown in Table 1.

[0034] Table 1 present embodiment material component ratio (mass ratio):

[0035]

[0036] The cement used above is ordinary Portland cement of strength grade 42.5, the particle size of the river sand is 0.3-0.8 mm, the fineness coefficient is 1.65, and the viscosity of the viscosity modifier is 12000 mPa.s.

[0037] The preparation steps are as follows:

[0038] 1) Preparation of waste plastic sheets with holes. Cut the waste plastic sheet to the size of the mold cavity, remove the oil stains on the surface of the waste plastic, and prepare circular through holes with a diameter of 8 mm on the surface of the waste plastic sheet. The distribution of the through holes is shown in figure 1 ;

[0039] A perforated corrugated plastic sheet is prepared. Put 5 plastic sheets with holes on the mold of the hot press, set the temperature of the upper and lower mold plate...

Embodiment 2

[0046] Embodiment 2: The material component ratio (mass part ratio) of this embodiment is shown in Table 2.

[0047]Table 2 present embodiment material component ratio (mass ratio):

[0048]

[0049] The cement used above is ordinary Portland cement of strength grade 42.5, the particle size of the river sand is 0.3-0.8 mm, the fineness coefficient is 1.65, and the viscosity of the viscosity modifier is 12000 mPa.s.

[0050] The preparation steps are as follows:

[0051] 1) Preparation of waste plastic sheets with holes. Cut the waste plastic sheet to the size of the mold cavity, remove the oil stains on the surface of the waste plastic, and prepare square through holes with a side length of 10mm on the surface of the waste plastic sheet. The distribution of the through holes is shown in figure 1 ;

[0052] A perforated corrugated plastic sheet is prepared. Put 6 perforated plastic sheets on the mold of the hot press, set the temperature of the upper and lower mold plate...

Embodiment 3

[0059] Embodiment 3: The material component ratio (mass part ratio) of this embodiment is shown in Table 3.

[0060] Table 3 present embodiment material component ratio (mass ratio):

[0061]

[0062] The cement used above is ordinary Portland cement of strength grade 42.5, the particle size of the river sand is 0.3-0.8 mm, the fineness coefficient is 1.65, and the viscosity of the viscosity modifier is 12000 mPa.s.

[0063] The preparation steps are as follows:

[0064] 1) Preparation of waste plastic sheets with holes. Cut the waste plastic sheet to the size of the mold cavity, remove the oil stains on the surface of the waste plastic, and prepare diamond-shaped through holes with a side length of 10mm on the surface of the waste plastic sheet. The distribution of the through holes is shown in figure 1 ;

[0065] A perforated corrugated plastic sheet is prepared. Put 5 plastic sheets with holes on the mold of the hot press, set the temperature of the upper and lower m...

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Abstract

The invention relates to a method for preparing high-toughness cement-based composite materials from waste plastics, belonging to the field of civil engineering and building materials. Disclosed is a high-toughness cement-based composite material prepared from waste plastics with high interfacial composite strength of plastics and cement and a toughening effect. The mass components of the cement-based composite material include: 100 parts of cement, 20-80 parts of fine sand, 30-50 parts of water, 1-20 parts of waste plastics, 0.3-0.8 parts of water reducing agent, and 0.095-0.15 parts of viscosity regulator . Among them, waste plastics are made into corrugated perforated sheets. The wavy structure makes the plastic sheet and the cement form a mechanical engagement in the transverse direction, and the holes on the plastic sheet make the cement and the plastic form a mechanical engagement in the thickness direction. Compared with traditional cement, it has higher impact strength and bending strength. The large tensile strain changes the failure mode of cement from brittle failure to ductile failure, and has good application prospects in the fields of earthquake resistance engineering and guardrail engineering.

Description

technical field [0001] The invention relates to a method for preparing high-toughness cement-based composite materials from waste plastics, belonging to the field of civil engineering and building materials. Background technique [0002] The environmental pollution caused by refractory polymer materials such as waste plastics and rubber is well known. According to the "Report on Comprehensive Utilization of China's Resources" published by the National Development and Reform Commission in 2014, my country's consumption of plastics in 2013 was 58.79 million tons, while the recycling of waste plastics was only 13 million tons, accounting for less than 25% of the total consumption. Japan, Europe and the United States and other developed countries have a significant difference in the recycling rate of more than 60%, which is far from meeting the current needs of my country in building an ecological society and supporting green development. Finding high-efficiency and low-cost res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/06C04B18/20C04B2103/302C04B2103/44
Inventor 江绍萍张靠民赵焱李如燕
Owner YUNNAN MINZU UNIV
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