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High-fluidity cement concrete and preparation method thereof

A cement concrete, high fluidity technology, applied in the field of building materials, can solve the problems of general compressive strength, impermeability, frost resistance and other properties, and cannot be applied well, and achieves inhibition of alkali-aggregate reaction, excellent resistance to Freeze, high early strength effects

Active Publication Date: 2019-04-26
内蒙古高速公路集团有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Invention patent application CN 106915912 A discloses a high fluidity impermeable concrete mixture, which contains 450-470 parts by weight of Portland cement; 380-400 parts by weight of fine sand; 220-250 parts by weight of medium coarse sand; 1150 parts by weight of gravel -1200 parts by weight; 90-95 parts by weight of mineral powder; 160-162 parts by weight of water; 12.7-12.9 parts by weight of pumping agent; Concrete mixture can organically combine the ultra-fine fiber polypropylene mesh fiber and fine sand, improve the adhesion between fine sand and other ingredients, and the compressive strength, impermeability, and frost resistance are general, and cannot be very good. It is well suitable for the occasions where the steel structure is denser in the on-site construction

Method used

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  • High-fluidity cement concrete and preparation method thereof
  • High-fluidity cement concrete and preparation method thereof
  • High-fluidity cement concrete and preparation method thereof

Examples

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Embodiment 1

[0059] The high fluidity cement concrete in the present embodiment comprises the following components by weight: 500 parts of sulphoaluminate cement; 300 parts of fine sand; 250 parts of medium coarse sand; 100 parts of mineral powder; 15 parts of graphene oxide; 75 parts of glass beads; 50 parts of gypsum; 8 parts of water reducing agent (carbonyl pyraldehyde); 5 parts of air-entraining agent (rosin resin); 4 parts of retarder (methyl borate); 5 parts of VAE emulsion; sodium citrate 5 parts, 6 parts of propylene glycol; 260 parts of water; 0.6 parts of polypropylene fiber;

[0060] Its preparation method is as follows:

[0061] (1) Fine sand, medium coarse sand, mineral powder, hollow glass microspheres of 10 microns and wall thickness of 1 micron, gypsum and graphene oxide are put into the mixer and stirred;

[0062] (2) Throwing in a filamentous polypropylene fiber with a length of 2 cm, dry mixing for 30 seconds;

[0063] (3) add 60% water, add compound admixture simulta...

Embodiment 2

[0071] The high fluidity cement concrete in the present embodiment comprises the following components by weight: 600 parts of sulphoaluminate cement; 400 parts of fine sand; 300 parts of medium coarse sand; 120 parts of mineral powder; 25 parts of graphene oxide; 85 parts of glass beads; 80 parts of gypsum; 10 parts of water reducer (carbonyl pyraldehyde); 8 parts of air-entraining agent (sodium tetradecylbenzenesulfonate); 6 parts of retarder (methyl phosphate); VAE emulsion 7 parts; 8 parts of sodium citrate, 10 parts of propylene glycol; 320 parts of water; 1.2 parts of polypropylene fiber;

[0072] Its preparation method is as follows:

[0073] (1) Fine sand, medium coarse sand, mineral powder, and 100 micron, hollow glass microspheres with a wall thickness of 2 microns, gypsum and graphene oxide are put into the mixer and stirred;

[0074] (2) Throwing in a filamentous polypropylene fiber with a length of 3 cm, dry mixing for 35 seconds;

[0075] (3) add 70% water, add ...

Embodiment 3

[0083] The high fluidity cement concrete in the present embodiment comprises the following components by weight: 530 parts of sulphoaluminate cement; 320 parts of fine sand; 280 parts of medium coarse sand; 100 parts of mineral powder; 18 parts of graphene oxide; 78 parts of glass beads; 60 parts of gypsum; 9 parts of water reducing agent (carbonyl pyraldehyde); 5 parts of air-entraining agent (saponin, protein, 2.5 parts each); 4 parts of retarder (methyl phosphate); 6 parts of VAE emulsion ; 5 parts of sodium citrate, 6 parts of propylene glycol; 300 parts of water; 1.0 parts of polypropylene fiber;

[0084] Its preparation method is as follows:

[0085] (1) Fine sand, medium coarse sand, mineral powder, and 250 microns, hollow glass microspheres with a wall thickness of 1 micron, gypsum and graphene oxide are loaded into the mixer and stirred;

[0086] (2) throwing in a filamentous polypropylene fiber with a length of 5 cm, dry mixing for 40 seconds;

[0087] (3) add 65% ...

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Abstract

The invention provides high-fluidity cement concrete and a preparation method thereof. The high-fluidity cement concrete comprises 500-600 parts by weight of sulphoaluminate cement, 300-400 parts by weight of fine sand, 250-300 parts by weight of medium-coarse sand, 100-120 parts by weight of mineral powder, 15-25 parts by weight of graphene oxide, 75-85 parts by weight of hollow glass beads, 50-80 parts by weight of gypsum, 33-49 parts by weight of compound admixture, 260-320 parts by weight of water and 0.6-1.2 parts by weight of concrete fibers; the concrete fibers are uniformly dispersed into monofilaments through mixing and stirring time by time, and then the monofilaments can be put into use; the cement concrete prepared by the preparation method provided by the invention can effectively improve the fluidity and ensure the compression resistance, the permeability resistance and the frost resistance.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high fluidity cement concrete and a preparation method thereof. Background technique [0002] As a building material with a large amount and a wide range of use in the world, concrete has been widely developed in various countries and regions for its good mechanical properties, economy and adaptability to the environment. put forward higher requirements. As the most commonly used structural form in the field of civil engineering, concrete structures have extremely complex construction and service environments. The durability of concrete in harsh environments is particularly prominent, and has become a research hotspot at home and abroad. Its strength, impermeability and water resistance are important factors affecting the durability of concrete. The strength and water resistance of concrete currently on the market are not very ideal, and the durability is poor, whi...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B111/20C04B111/34
CPCC04B28/06C04B2111/00017C04B2111/00293C04B2111/20C04B2111/2038C04B2111/343C04B2201/50C04B14/06C04B14/024C04B18/141C04B14/22C04B22/143C04B24/26C04B24/06C04B24/02C04B16/0633C04B24/008C04B24/34C04B24/006C04B24/16C04B24/003C04B24/14C04B24/38
Inventor 刘胜军宝群群张志强秦明星姚嘉季春霞张寒梅李晓燕张惠芳辛炜刘芳赵宇宾王新宇
Owner 内蒙古高速公路集团有限责任公司
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