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Sponge coke and vacuum residue modified high-ductility concrete and preparation method thereof

A technology of high ductility concrete and decompression residue oil, applied in the field of fiber concrete, to achieve the effect of improving ultimate tensile strength and tensile strain, not easy to wear, and reducing the probability of being pulled out

Inactive Publication Date: 2021-06-18
CHINA ROAD & BRIDGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large chemical bonding energy causes the PVA fibers to be broken during tension, which limits the improvement of the tensile properties of high ductility concrete materials

Method used

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  • Sponge coke and vacuum residue modified high-ductility concrete and preparation method thereof
  • Sponge coke and vacuum residue modified high-ductility concrete and preparation method thereof
  • Sponge coke and vacuum residue modified high-ductility concrete and preparation method thereof

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preparation example Construction

[0036] The present invention provides the preparation method of high-derivative concrete modified above the above-mentioned sponge coke and decompression residue, including the following steps:

[0037] (1) Comparative reduced pressure residue is heated with sponge to obtain a mixture of the plus;

[0038] (2) Stirring water, cement, fly ash, quartz sand and water reducer, and obtain premixed liquid;

[0039] (3) Mix the premixed liquid with an additive mixture, polyvinyl alcohol fibers, to obtain a high-profile concrete modified by sponge coke and decompression residue;

[0040] The steps (1), (2) have no time order limit.

[0041]The discollection residue is booled with a sponge to obtain a mixture of an extension. In the present invention, the temperature of the heating mixing is preferably 140 to 160 ° C, more preferably from 145 to 155 ° C. The present invention preferably heats the reduced pressure residue, and then adds a sponge mixing into the heat and reduction residue. I...

Embodiment 1

[0047] A sponge coke and decompression residue modified hypervasive concrete, prepared from the following mass of raw materials:

[0048]

[0049] Among them, the particle size of the fly ash is 1 to 100 μm, the particle size of the quartz sand is 0.5 to 2 mm, the particle size of the sponge is ≤ 1 mm; the polyvinyl alcohol fibers have a diameter of 14 to 26 μm, and the length is 6 to 12 mm.

[0050] The viscosity of the reduced pressure residue is 400mm 2 / S, the boiling point is 550 ° C, and the glue content in the decompression residue is 46%.

[0051] The preparation method is as follows:

[0052] (1) Add 90 cement, 200 pieces of fly ash, 120 pieces of stone sand into the stirring pan, stir well;

[0053] (2) Incorporating 0.2 parts water reduction into 80 parts of water, stir well;

[0054] (3) The liquid in step (2) is added to the stirring pan to continue stirring until the slurry flow spread reaches 230 mm to obtain a premixed liquid;

[0055] (4) 2 parts of decompressi...

Embodiment 2

[0059] A sponge coke and decompression residue modified hypervasive concrete, prepared from the following mass of raw materials:

[0060]

[0061] Among them, the particle size of the fly ash is 1 to 100 μm, the particle size of the quartz sand is 0.5 to 2 mm, the particle size of the sponge is ≤ 1 mm; the polyvinyl alcohol fibers have a diameter of 14 to 26 μm, and the length is 6 to 12 mm.

[0062] The viscosity of the reduced pressure residue is 450mm 2 / S, the boiling point is 550 ° C, and the glue content in the decompression residue is 48%.

[0063] The preparation method is as follows:

[0064] (1) Add 110 cement, 260 pieces of fly ash, 150 pieces of stone sand into the stirring pan, stir well;

[0065] (2) In 100 parts of water, 0.3 parts of water reduction agent is mixed into 100 parts of water, stir well;

[0066] (3) The liquid in step (2) is added to the stirring pan to continue stirring until the slurry flow spread reaches 230 mm;

[0067] (4) 4 parts of decompress...

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Abstract

The invention provides sponge coke and vacuum residue modified high-ductility concrete and a preparation method thereof, and belongs to the field of fiber concrete. The high-ductility concrete provided by the invention comprises the following components in parts by mass: 90-150 parts of cement, 200-350 parts of fly ash, 120-180 parts of quartz sand, 15-20 parts of sponge coke, 2-6 parts of vacuum residue, 10-20 parts of polyvinyl alcohol fiber, 0.2-0.4 part of a water reducing agent, and 80-135 parts of water. The sponge coke and the vacuum residue are used as concrete admixtures and have a synergistic effect, so that the chemical bonding energy between the polyvinyl alcohol fiber and a cement hydration product can be effectively reduced, and the probability that the polyvinyl alcohol fiber is broken by pulling is reduced, thereby improving the tensile deformation capacity of the high-ductility concrete material and improving the ultimate tensile strength and tensile strain of the high-ductility concrete.

Description

Technical field [0001] The present invention relates to the field of fiber concrete technology, and more particularly to a modified hypervascular concrete and a preparation method thereof. Background technique [0002] As the most common building materials, cement concrete exhibits a brittle characteristic under stretching or bending load. In order to improve the brittleness of the concrete material, a quantity of short-cut fibers are usually added to the concrete material to make fiber concrete. [0003] ENGINEERED CEMENTITES (ECC) is a special fiber reinforced cement-based material. It is based on microscopic mechanics and fracture mechanical design theory. By designing and optimizing cement matrix, fiber, fiber / matrix interface properties, typically has a fiber dosage of about 2%. Unlike the brittle failure mode of ordinary concrete or fiber concrete, under direct tensile load, ECC exhibits ultra-high ductility and toughness, and its stretch strain can be 3 to 8%, about 300 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B111/20
CPCC04B28/02C04B2201/50C04B2111/2038C04B18/08C04B14/06C04B16/0641C04B14/022C04B18/04C04B2103/302
Inventor 王随原李刚杨小刚曾峰李伟雄于华洋陈搏
Owner CHINA ROAD & BRIDGE
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