High-strength lightweight aggregate concrete and preparation process thereof

A technology of lightweight aggregate concrete and concrete, which is applied in the field of construction engineering, can solve the problems of unsuitable strength requirements and low strength of lightweight concrete, and achieve the effects of improving surface bonding, easy implementation, and convenient operation

Pending Publication Date: 2019-09-10
成都精准混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the strength grade of C20-C40 is relatively low for lightweight concrete, which is not suitable for construction projects with strength requirements of C60 and above

Method used

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  • High-strength lightweight aggregate concrete and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A preparation method of high-strength lightweight aggregate concrete comprises the following steps:

[0061] Soak the ceramsite in water for 50 minutes, remove the ceramsite, and drain the surface water;

[0062] Put 429kg of ceramsite, 121kg of crushed stone and 85.5kg of water after draining into the mixer, and stir for 15s to obtain the first mixture;

[0063] Then 411kg of cement, 36kg of slag, 39kg of coal gangue powder, 50kg of floating beads and 615kg of pottery sand were put into the mixer and mixed with the first mixture, and stirred for 30 seconds to obtain the second mixture;

[0064] Finally, put 85.5kg of water and 11.5kg of retarder polycarboxylate superplasticizer into the mixer, mix with the second mixture, and stir for 110s to obtain the concrete mixture; pour the concrete mixture into shape, and maintain , to produce high-strength lightweight aggregate concrete.

Embodiment 2

[0066] A preparation method of high-strength lightweight aggregate concrete comprises the following steps:

[0067] Soak the ceramsite in water for 60 minutes, remove the ceramsite, and drain the surface water;

[0068] Put 492kg of ceramsite, 153kg of gravel and 90kg of water drained into the mixer, and stir for 25s to obtain the first mixture; then mix 414kg of cement, 48kg of silica fume, 40kg of coal gangue powder, 55kg of floating beads and 621kg of volcanic slag Continue to put into the blender and mix with the first mixture, stir for 40s to obtain the second mixture;

[0069] Finally, 90kg of water and 11.9kg of retarder polycarboxylate superplasticizer are put into the mixer, mixed with the second mixture, and stirred for 130s to obtain the concrete mixture; the concrete mixture is poured into shape, maintained, High-strength lightweight aggregate concrete can be produced.

Embodiment 3

[0071] A preparation method of high-strength lightweight aggregate concrete comprises the following steps:

[0072] Soak the ceramsite in water for 70 minutes, remove the ceramsite, and drain the surface water;

[0073] Put 625.6kg of ceramsite, 54.4kg of gravel and 88kg of water drained into the mixer, and stir for 20 seconds to obtain the first mixture;

[0074] Then 417kg cement, 39kg fly ash, 44kg slag, 60kg floating beads and 627kg coal slag were put into the mixer and mixed with the first mixture, and stirred for 50s to obtain the second mixture;

[0075] Finally, put 88kg of water and 12.3kg of retarder polycarboxylate superplasticizer into the mixer, mix with the second mixture, and stir for 120s to obtain the concrete mixture; the concrete mixture is poured into shape, maintained, High-strength lightweight aggregate concrete can be produced.

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Abstract

The invention discloses a high-strength lightweight aggregate concrete and a preparation process thereof. The concrete is prepared from the following raw materials in parts by weight: 411 to 417 partsby weight of cement, 75 to 88 parts by weight of mineral admixture, 50 to 60 parts by weight of floating beads, 550 to 680 parts by weight of coarse aggregate, 615 to 627 parts by weight of fine aggregate, 11.5 to 12.3 parts by weight of additive and 171 to 180 parts by weight of water. It has the advantages of high strength, low apparent density and low thermal conductivity. In addition, the preparation method comprises the following steps: firstly, the coarse aggregate is mixed with 50% of water, then cement, mineral admixture, floating beads and fine aggregate are added and uniformly mixed, finally, the remaining 50% of water and the additive are added and uniformly stirred to obtain concrete. The preparation method of the invention has the advantages of simple process, easy implementation, safety and high efficiency.

Description

technical field [0001] The invention relates to the technical field of construction engineering, more specifically, it relates to a high-strength lightweight aggregate concrete and a preparation process thereof. Background technique [0002] Concrete refers to the artificial stone made of cement as the main cementitious material, mixed with water, sand, stones, chemical admixtures and mineral admixtures when necessary, mixed in appropriate proportions, uniformly stirred, compacted and cured. Light aggregate concrete is composed of light coarse aggregate and / or light fine aggregate, cement, water, etc. The apparent density is not more than 1950kg / m 3 of concrete. Light aggregate concrete has the characteristics of light weight, good thermal insulation and fire resistance. Compared with ordinary concrete of the same label, light aggregate concrete can reduce its own weight by more than 20-30%. Light aggregate concrete has good deformation performance and elasticity. The modu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B2201/52
Inventor 王小均魏进吴军刘作科程玉凤何松涛
Owner 成都精准混凝土有限公司
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