Self-compacting concrete and preparation method thereof

A self-compacting concrete and stone technology, applied in the field of building materials, can solve the problem that the compressive strength of self-compacting concrete cannot meet the requirements of concrete compressive strength, and achieve the goal of improving self-compacting performance, compressive strength and fluidity Effect

Inactive Publication Date: 2018-05-22
南通中厦建筑工程总承包有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, as can be seen from the above, the compressive strength of the self-compacting concrete prepared according to this scheme cannot meet the requirements of the existing concrete compressive strength, and its technical scheme needs to be further improved.

Method used

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  • Self-compacting concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A self-compacting concrete, comprising the following components per cubic meter of self-compacting concrete:

[0047] 155kg of water;

[0048] Cement 360 kg;

[0049] Sand material 750 kg;

[0050] Stone 980 kg;

[0051] Mineral admixture 160 kg;

[0052] Admixture 6 kg;

[0053] Ultrafine powder 2 kg;

[0054] Modifier 2 kg.

[0055] Among them, the cement is p.042.5 cement, and the sand material is low-alkali active mechanism sand with a fineness modulus of 2.3; the stone material is two gradations of 5-16mm and 5-25mm low-alkali active machine-made crushed stone mixture, and the two The weight ratio of the two is 1:1; the mineral admixture is a mixture of Class I fly ash and S75 mineral powder, and the weight ratio of the two is 2:1; the admixture is a polycarboxylic acid regulator; the ultrafine powder is two Tin oxide; modifiers include absolute ethanol and fluorocarboxylic acid, the weight ratio of the two is 5:2.

[0056] Its preparation method is:

[00...

Embodiment 2

[0062] A self-compacting concrete, comprising the following components per cubic meter of self-compacting concrete:

[0063] 160kg of water;

[0064] 400 kg of cement;

[0065] Sand material 800 kg;

[0066] Stone 960 kg;

[0067] Mineral admixture 180 kg;

[0068] Admixture 6 kg;

[0069] Ultrafine powder 1 kg;

[0070] Modifier 2 kg.

[0071]Among them, the cement is p.042.5 cement, and the sand material is low-alkali active mechanism sand with a fineness modulus of 2.5; the stone material is two gradations of 5-16mm and 5-25mm low-alkali active machine-made crushed stone mixture, and the two The weight ratio is 1:1; the mineral admixture is a mixture of Class I fly ash and S75 mineral powder, and the weight ratio of the two is 3:2; the admixture is a polycarboxylic acid regulator; the ultrafine powder is boron zirconium oxide; the modifying agent includes absolute ethanol and fluorinated carboxylic acid, and the weight ratio of the two is 5:2.

[0072] Its preparati...

Embodiment 3

[0078] A self-compacting concrete, comprising the following components per cubic meter of self-compacting concrete:

[0079] 170kg of water;

[0080] Cement 380 kg;

[0081] Sand material 700 kg;

[0082] Stone 970 kg;

[0083] Mineral admixture 200 kg;

[0084] Admixture 5 kg;

[0085] Ultrafine powder 3 kg;

[0086] Modifier 3 kg.

[0087] Among them, the cement is p.042.5 cement, and the sand material is low-alkali active mechanism sand with a fineness modulus of 2.8; the stone material is low-alkali active machine-made crushed stone mixture with two grades of 5-16mm and 5-25mm, and two The weight ratio of the two is 2:1; the mineral admixture is a mixture of Class I fly ash and S75 mineral powder, and the weight ratio of the two is 1:1; the admixture is a polycarboxylic acid regulator; the ultrafine powder is two Tin oxide; modifiers include absolute ethanol and fluorocarboxylic acid, the weight ratio of the two is 5:2.

[0088] Its preparation method is:

[0089]...

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Abstract

The invention relates to the technical field of building materials, and particularly discloses self-compacting concrete and a preparation method thereof. The self-compacting concrete is higher in flowability and stronger in compressive strength. According to the technical scheme, the self-compacting concrete is characterized in that every cubic meter of self-compacting concrete is prepared from the following components: 155 to 170 kilograms of water, 350 to 400 kilograms of cement, 700 to 800 kilograms of sand, 960 to 1,000 kilograms of stones, 160 to 200 kilograms of a mineral additive, 5 to7 kilograms of an admixture, 1 to 4 kilograms of ultrafine powder and 2 to 5 kilograms of a modifier. According to the self-compacting concrete and the preparation method thereof, the concrete is prepared by mixing each raw material according to a certain proportion, so that the concrete is endowed with a higher gap passing rate and self-compacting capability, and can freely flow to fully fill aninternal space of a structure to form a uniformly compacted structure; the ultrafine powder is added into the concrete, so that the flowability of the concrete is further improved, and meanwhile, thecompressive strength is strengthened.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a self-compacting concrete and a preparation method thereof. Background technique [0002] Self-compacting concrete, which has high fluidity, uniformity and stability, does not require external vibration during pouring, that is, concrete that can flow under its own weight and fill the formwork space. [0003] For example, the invention patent with the publication number CN105801053A discloses a self-compacting concrete with a large amount of fly ash C40, which improves the performance of concrete by adding polycarboxylate additives and a large amount of fly ash to cement and sand. Reduce cement hydration heat and improve concrete durability. And the compressive strength of the self-compacting concrete prepared by it reaches 40-47Mpa at 7d, and reaches 50-62Mpa at 28d. [0004] However, it can be known from the above that the compressive strength of the self-compactin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02
CPCC04B28/04C04B20/023C04B2201/50C04B22/002C04B14/06C04B14/02C04B18/08C04B18/141C04B24/24C04B22/06C04B24/026C04B24/04C04B22/0013
Inventor 徐文慧仇连勇
Owner 南通中厦建筑工程总承包有限公司
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