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High-toughness bridge deck pavement fibre concrete and preparation method thereof

A technology of fiber concrete and bridge deck pavement, which is applied in the field of high toughness bridge deck pavement fiber concrete and its preparation, which can solve the problems of difficult construction, large capacity, and poor workability, so as to increase the service life and safety , excellent performance and improved durability

Inactive Publication Date: 2018-06-12
北京新桥技术发展有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Synthetic fibers in the prior art include: polypropylene (PP) fiber, polyethylene (PE) fiber, polyamide (nylon / nylon, PA) fiber, polyacrylonitrile (acrylic, PAN) fiber, polyester (polyester, PET) Fiber, polyvinyl alcohol (vinylon, PVA) fiber, etc., because the bridge deck pavement concrete is in a bending state all the year round, and the concrete material in the bending moment area is under tension for a long time, but the current bridge deck pavement fiber concrete generally has a large volume, and the dosage High, workability is not good, construction is difficult, and there are durability problems that cannot be ignored

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The high tenacity bridge deck pavement fiber concrete of the present embodiment comprises following raw materials by weight:

[0011] cement

480 copies;

sand

810 copies;

rough stone

545 copies;

fine stone

360 copies;

imitation steel fiber

5.7 copies;

Polycarboxylate superplasticizer

2.5 copies;

water

165 copies.

[0012] Preferably, the main material of the imitation steel fiber is modified polypropylene resin, the shape is zigzag, the equivalent diameter is 0.8 millimeters, the length is 3 centimeters, the density is 0.95 grams per cubic centimeter, the tensile strength is greater than 450 MPa, and the initial elastic modulus Greater than 3500 MPa, the elongation at break is between 15 and 40%.

[0013] Preferably, the polycarboxylate superplasticizer is powder, the water content is less than 3wt%, the bulk density is 500-550 grams per liter, the loss on ignition is greater than 85wt%, ...

Embodiment 2

[0019] The high tenacity bridge deck pavement fiber concrete of the present embodiment comprises following raw materials by weight:

[0020] cement

470 copies;

sand

800 copies;

rough stone

535 copies;

fine stone

350 copies;

imitation steel fiber

4.7 copies;

Polycarboxylate superplasticizer

1.5 copies;

water

155 copies.

[0021] Preferably, the main material of the imitation steel fiber is modified polypropylene resin, the shape is zigzag, the equivalent diameter is 0.8 millimeters, the length is 3 centimeters, the density is 0.95 grams per cubic centimeter, the tensile strength is greater than 450 MPa, and the initial elastic modulus Greater than 3500 MPa, the elongation at break is between 15 and 40%.

[0022] Preferably, the polycarboxylate superplasticizer is powder, the water content is less than 3wt%, the bulk density is 500-550 grams per liter, the loss on ignition is greater than 85wt%, ...

Embodiment 3

[0028] The high tenacity bridge deck pavement fiber concrete of the present embodiment comprises following raw materials by weight:

[0029] cement

490 copies;

sand

820 copies;

rough stone

555 copies;

fine stone

370 copies;

imitation steel fiber

6.7 copies;

Polycarboxylate superplasticizer

3.5 copies;

water

175 copies.

[0030] Preferably, the main material of the imitation steel fiber is modified polypropylene resin, the shape is zigzag, the equivalent diameter is 0.8 millimeters, the length is 3 centimeters, the density is 0.95 grams per cubic centimeter, the tensile strength is greater than 450 MPa, and the initial elastic modulus Greater than 3500 MPa, the elongation at break is between 15 and 40%.

[0031] Preferably, the polycarboxylate superplasticizer is powder, the water content is less than 3wt%, the bulk density is 500-550 grams per liter, the loss on ignition is greater than 85wt%, ...

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Abstract

The invention discloses high-toughness bridge deck pavement fibre concrete and a preparation method thereof. The high-toughness bridge deck pavement fibre concrete is prepared from the following components in parts by weight: 470 to 490 parts of cement, 800 to 820 parts of sand, 535 to 555 parts of rough stones, 350 to 370 parts of fine stones, 4.7 to 6.7 parts of imitation steel fibres, 1.5 to 3.5 parts of a polycarboxylate superplasticizer and 155 to 175 parts of water. The high-toughness bridge deck pavement fibre concrete has the advantages that the performance is excellent; the flexural toughness index I5 of the high-toughness bridge deck pavement fibre concrete is 2.7 times that of plain concrete; the fatigue strength is improved by 7.2 percent compared with that of the plain concrete; the splitting tensile strength is improved by 16.6 percent; the compressive strength of the concrete is not affected. The durability is improved; the high-toughness bridge deck pavement fibre concrete is particularly suitable for a concrete structure, which is exposed in natural environment for a long time and is greatly influenced by the environment, such as a bridge deck.

Description

technical field [0001] The invention relates to a high toughness bridge deck pavement fiber concrete and a preparation method thereof. Background technique [0002] Synthetic fibers in the prior art include: polypropylene (PP) fiber, polyethylene (PE) fiber, polyamide (nylon / nylon, PA) fiber, polyacrylonitrile (acrylic, PAN) fiber, polyester (polyester, PET) Fiber, polyvinyl alcohol (vinylon, PVA) fiber, etc., because the bridge deck pavement concrete is in a bending state all the year round, the concrete material in the bending moment area is under tension for a long time, and the current bridge deck pavement fiber concrete generally has a large volume, and the dosage High, workability is not good, construction is difficult, and there are durability problems that cannot be ignored. Contents of the invention [0003] In view of this, the main purpose of the present invention is to provide a high toughness bridge deck pavement fiber concrete, which can increase the splitti...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2201/50C04B2201/52C04B14/06C04B14/02C04B16/0633C04B2103/302
Inventor 刘兆磊李发展余万福赵平于蕾陈雷张述雄
Owner 北京新桥技术发展有限公司
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