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Lightweight high-strength concrete and preparation method thereof

A high-strength concrete and concrete technology, applied in the field of building materials, can solve the problems of low strength and poor fluidity of high-strength lightweight aggregate concrete, and achieve the effects of improving toughness, reducing shear stress and plastic viscosity, and reducing cracking

Inactive Publication Date: 2020-06-19
中建西部建设贵州有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a lightweight high-strength concrete and its preparation method to solve the problems of low strength of light-weight aggregate concrete and poor fluidity of high-strength lightweight aggregate concrete in the prior art

Method used

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  • Lightweight high-strength concrete and preparation method thereof
  • Lightweight high-strength concrete and preparation method thereof

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Embodiment Construction

[0022] A preparation method for lightweight high-strength concrete, comprising the following steps:

[0023] Step 1: put the lightweight spherical coarse aggregate into water for pre-wet treatment for 24 hours, and then dry it naturally so that the moisture content is 0.2%-0.5%;

[0024] Step 2: the unilateral consumption of each component of the concrete is weighed according to Embodiment 1-8;

[0025]

[0026] Step 3: First add the weighed cement, high-activity spherical silicon-aluminum material, low-activity alkaline calcareous material iron ore powder, light spherical fine material glass beads into the mixing pot, and stir for 30 seconds to make the powder Fully and evenly disperse, then add water and 2 / 3 of the admixture to stir to obtain a slurry, then add the steel fiber into the stirring pot within 2 minutes to obtain a uniform steel fiber slurry, and then add the light Fine aggregate shale clay sand and lightweight spherical coarse aggregate are added to the mixi...

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Abstract

The invention discloses lightweight high-strength concrete and a preparation method thereof. The lightweight high-strength concrete comprises 550-650 parts of cement, 50 to 150 parts of a high-activity spherical silica-alumina material, 250 to 350 kg / m<3> of a low-activity alkaline calcareous material, 100 to 150 kg / m<3> of a light spherical fine material, 100 to 120 kg / m<3> of a light fine aggregate, 350 to 450 kg / m<3> of a light spherical coarse aggregate, 135 to 150 kg / m<3> of water, 20 to 30 kg / m<3> of an additive and 50 to 100 kg / m<3> of high-toughness fibers. According to the prepared lightweight aggregate concrete, due to matching of the cementing material and adding of the high-toughness fibers, the 28d compressive strength is 70 MPa or above, meanwhile, due to the ball effect of the cementing material and blending of the additive, the concrete is good in fluidity and the expansion degree ranges from 640 mm to 680 mm. The steel fiber is added into the lightweight aggregate high-strength concrete, so that the concrete is good in toughness, not easy to shrink and good in durability.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a lightweight high-strength concrete and a preparation method thereof. Background technique [0002] Lightweight aggregate concrete refers to the concrete with an apparent density of not more than 1900kg / m3 prepared with light coarse aggregate, light sand or ordinary sand, cement and water. 3 Lightweight aggregate concrete has the advantages of low density, high relative strength, good thermal insulation and frost resistance, reduces the self-weight of the structure, and has technical and economic advantages. It is difficult to ensure the fluidity of concrete while having high strength. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a light-weight high-strength concrete and its preparation method to solve the problems of low strength of light-weight aggregate concrete and poor fluidity of high-strength li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/08C04B111/40
CPCC04B28/04C04B2111/40C04B2201/20C04B2201/52C04B14/36C04B22/00C04B18/027C04B14/24C04B14/48
Inventor 叶鸿宏林喜华班录江何凯路东义赵士豪杨光林李江
Owner 中建西部建设贵州有限公司
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