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Concrete and preparation method thereof

A concrete and retarder technology, which is applied in the manufacture of rayon, single-component polyester rayon, and fiber chemical characteristics, can solve the problems of limited pore-causing effect of foaming agent and insignificant improvement of concrete surface cracks, etc. , to achieve the effects of strong ductility and fluidity, avoiding the reduction of slump, and improving the ability to resist temperature stress

Inactive Publication Date: 2021-03-09
北京城建九混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor believes that the temperature stress of the concrete is reduced by increasing the rate of heat loss inside the concrete by means of pore-making, thereby improving the occurrence of temperature cracks. The improvement effect of surface cracks is not significant

Method used

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  • Concrete and preparation method thereof
  • Concrete and preparation method thereof
  • Concrete and preparation method thereof

Examples

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Effect test

preparation example 1

[0037] The preparation method of the far-infrared fiber / nano-titanium nitride / PET composite material is:

[0038] (1) Disperse 30%wt nano-titanium nitride in ethylene glycol, mix terephthalic acid and antimony trioxide uniformly and add to the polymerization kettle, the quality of ethylene glycol, terephthalic acid, antimony trioxide The ratio is 1:2.75:0.02. After the polymerization tank is sealed, pressurize to 0.25MPa, heat up to 250°C, stir at 100r / min, and perform esterification for 1.5h to obtain an intermediate product;

[0039] (2) Carry out polycondensation treatment on the intermediate product, make the vacuum degree rise to 20Pa, control the temperature at 270°C, adjust the stirring speed to 240r / min, react for 1.5h, and prepare the nano-titanium nitride / PET polycondensate;

[0040] (3) the pressure is adjusted back to normal pressure, the temperature is adjusted to 50°C, the stirring speed is adjusted to 130r / min, and the far-infrared ceramic powder accounting for ...

preparation example 2

[0042] The preparation method of far-infrared fiber / PET composite material is:

[0043](1) Put PET into the reaction kettle, adjust the pressure to normal pressure, and heat it to a molten state;

[0044] (2) Adjust the stirring speed to 130r / min, and add the far-infrared ceramic powder into the molten PET, stir and mix evenly, discharge the material, cool and granulate, and then spin the masterbatch to obtain the far-infrared fiber / PET composite Material.

Embodiment 1

[0047] A kind of concrete, its raw material and portion are as shown in table 1;

[0048]

[0049]

[0050] Among them, the filler includes fly ash, xanthan gum and slag powder with a mass ratio of 1:1:1.5;

[0051] The concrete preparation method specifically comprises the following steps:

[0052] S1. Weigh gravel, fine sand, cement, water, filler, nickel-titanium alloy, water reducer and retarder by weight for subsequent use;

[0053] S2. Stir the crushed stone, fine sand and cement evenly to make a mixed dry material;

[0054] S3. Then add water and water reducer to the mixed dry material, stir for 10 minutes, add filler and nickel-titanium alloy, continue stirring for 5 minutes, add retarder, and mix evenly to obtain a finished concrete product.

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Abstract

The invention relates to the technical field of building materials, and particularly discloses concrete which is prepared from the following raw materials in parts by weight: 900-1100 parts of gravels, 400-600 parts of fine sand, 150-250 parts of cement, 100-300 parts of water, 100-200 parts of a filler, 100-200 parts of nickel-titanium alloy, 3-5 parts of a water reducing agent and 1-3 parts of aretarder. The preparation method comprises the following steps: S1, weighing the gravels, fine sand, cement, water, a filler, a nickel-titanium alloy, a water reducing agent and a retarder in parts by weight for later use; S2, uniformly stirring gravels, fine sand and cement to prepare a mixed dry material; and S3, adding water and the water reducing agent into the mixed dry material, stirring for 5-10 minutes, adding the filler and the nickel-titanium alloy, continuously stirring for 3-5 minutes, adding the retarder, and uniformly stirring to obtain a concrete finished product. The cracks inthe concrete surface are greatly reduced.

Description

technical field [0001] The application relates to the technical field of building materials, more specifically, it relates to a concrete and a preparation method thereof. Background technique [0002] Concrete is one of the most important civil engineering materials in contemporary times. It has the characteristics of abundant raw materials, low price and simple production process. Therefore, concrete is not only used in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal Concrete is also an important material in industries such as engineering. During the process of mixing, preparing and placing concrete, the concrete will generate heat of hydration, which will lead to an increase in its internal temperature and an increase in the temperature difference between the internal and external surfaces, resulting in different degrees of internal and external thermal expansion and contraction, resulting in compressive stress inside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/48C04B20/00D01F6/92D01F1/10
CPCC04B14/48C04B20/0068C04B28/04C04B2201/50D01F1/10D01F6/92C04B14/02C04B14/06C04B24/06C04B2103/302C04B18/08C04B18/141C04B24/38
Inventor 卫晓勇任荣鑫陈志鹏董福明
Owner 北京城建九混凝土有限公司
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