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A kind of concrete and preparation method thereof

A concrete and mass fraction technology, applied in the field of building materials, can solve problems such as large density difference, easy to block pipes, aggregate sinking, etc., and achieve the effect of improving fluidity, not easy to crack, and easy to mix

Active Publication Date: 2021-07-20
海门市帕源道路工程材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high density of aggregates such as sand and stone, there is a large difference in density between them and other components in concrete, which makes it easy for aggregates to sink and water to rise during transportation, vibration and pumping. phenomenon, even sand and stones are easy to block the pipeline during the pumping process, and there is still room for improvement

Method used

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  • A kind of concrete and preparation method thereof
  • A kind of concrete and preparation method thereof
  • A kind of concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A concrete comprising the following components in parts by mass:

[0051] Portland cement 22.5kg; water 45kg; sand 22.5kg; stone 37.5kg; sulfamate superplasticizer 1.35kg; carboxymethyl cellulose 0.15kg; silane coupling agent 7.5kg.

[0052] In this embodiment, the viscosity of carboxymethyl cellulose is 6000 mPa.s.

[0053] In this embodiment, the silane coupling agent adopts 3-aminopropyltrimethoxysilane, and in other embodiments, the silane coupling agent can also adopt N-phenyl-3-aminopropyltrimethoxysilane, N -(2-Aminoethyl)-3-aminopropyltrimethoxysilane and the like.

[0054] Concrete is prepared as follows:

[0055] (1) Add 22.5kg of sand and 37.5kg of stone to the sand and gravel mixer at room temperature, and stir at a speed of 200r / min. After stirring evenly, aggregates are obtained;

[0056] (2) Add Portland cement 22.5kg while stirring, after stirring evenly, obtain the premix;

[0057] (3) Put the uniform premix in step (2) into the concrete mixer. Unde...

Embodiment 2

[0059] A concrete comprising the following components in parts by mass:

[0060] Portland cement 27kg; water 52.5kg; sand 27kg; stone 44kg; sulfamate superplasticizer 1.6kg; carboxymethyl cellulose 0.18kg; silane coupling agent 8.7kg.

[0061] In this embodiment, the viscosity of carboxymethyl cellulose is 6000 mPa.s.

[0062] In this embodiment, N-phenyl-3-aminopropyltrimethoxysilane is used as the silane coupling agent.

[0063] Concrete is prepared as follows:

[0064] (1) In the gravel mixer, under normal temperature conditions, add 27kg of sand and 44kg of stone, and stir at a speed of 200r / min. After stirring evenly, aggregates are obtained;

[0065] (2) Add Portland cement 27kg while stirring, after stirring evenly, obtain the premix;

[0066] (3) Put the uniform premix in step (2) into the concrete mixer, and stir at a speed of 200r / min under normal temperature conditions, and add 52.5kg of water and sulfamate-based high-efficiency water reducer while stirring 1.6k...

Embodiment 3

[0068] A concrete comprising the following components in parts by mass:

[0069] Portland cement 30kg; water 60kg; sand 30kg; stone 50kg; sulfamate superplasticizer 1.8kg; carboxymethyl cellulose 0.2kg; silane coupling agent 10kg.

[0070] In this embodiment, the viscosity of carboxymethyl cellulose is 6000 mPa.s.

[0071] In this embodiment, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane is used as the silane coupling agent.

[0072] Concrete is prepared as follows:

[0073] (1) Add 30kg of sand and 50kg of stone to the sand and gravel mixer at room temperature, and stir at a speed of 200r / min. After stirring evenly, aggregates are obtained;

[0074] (2) Add Portland cement 30kg while stirring, after stirring evenly, obtain the premix;

[0075] (3) Put the uniform premix in step (2) into the concrete mixer. Under normal temperature, stir at a speed of 200r / min. While stirring, add 60kg of water and sulfamate-based high-efficiency water reducer 1.8 kg, 0.2 kg of carboxymet...

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Abstract

The invention relates to the field of building materials. Aiming at the problem that concrete is prone to segregation or bleeding during the process of mixing and mixing, resulting in pipeline blockage, a concrete is provided, which includes the following components in parts by mass: Portland cement 22.5‑ 30 parts; 45-60 parts of water; 22.5-30 parts of sand; 37.5-50 parts of stone; 1.35-1.8 parts of sulfamate superplasticizer; 10 servings. A method for preparing concrete, comprising the following steps: (1) adding sand and stone to a mixer and stirring uniformly to obtain aggregate; (2) adding microsilica fume and Portland cement while stirring, and stirring uniformly to obtain a premix ; (3) Add the remaining raw materials while stirring, stir evenly and form concrete after curing. By adding carboxymethyl cellulose, it is beneficial to increase the consistency of the cement slurry, which is conducive to the uniform dispersion of sand and stone in the cement slurry, making it easier to mix the concrete evenly, so that the sand and stone are not easy to block the pipeline during pumping. .

Description

technical field [0001] The invention relates to the field of building materials, more specifically, it relates to a concrete and a preparation method thereof. Background technique [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, concrete refers to the cement concrete obtained by mixing cement with cement as cementing material, sand and stone as aggregate, and water (may contain admixtures and admixtures) in a certain proportion, also known as ordinary concrete. It is widely used in civil engineering. [0003] However, due to the high density of aggregates such as sand and stone, there is a large difference in density between them and other components in concrete, which makes it easy for aggregates to sink and water to rise during transportation, vibration and pumping. The phenomenon that the sand and stone are easy to block the pipeline during the pumping pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B22/002C04B14/06C04B14/02C04B2103/302C04B24/383C04B24/42
Inventor 袁建成陆海健
Owner 海门市帕源道路工程材料有限公司
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