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Self-compacting light aggregate concrete and preparation method thereof

A lightweight aggregate concrete and self-compacting technology, applied in the field of concrete, can solve the problems of poor homogeneity and low floating bead density of the self-compacting lightweight aggregate mixture, and achieve the reduction of apparent density and low apparent density. , the effect of increasing strength

Inactive Publication Date: 2014-05-21
北京中联新航建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, those skilled in the art know that if floating beads are used for self-compacting lightweight aggregate concrete, since the characteristic of self-compacting lightweight aggregate concrete is that construction does not require vibration, it can be filled and formed in the formwork under the action of its own weight. However, due to the low density of the floating beads, they are particularly easy to float and drift, and the floating and drifting of the floating beads can easily lead to poor homogeneity of the self-compacting lightweight aggregate mixture

Method used

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  • Self-compacting light aggregate concrete and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] The self-compacting lightweight aggregate concrete described in this example is composed of the following raw materials: P·O 52.5 cement 480kg, apparent density 2000 kg / m 3 The fly ash is 90kg, the apparent density is 2000kg / m 3 , The bulk density is 200kg / m 3 80kg of silica fume, the particle size is 0.01~0.2mm, and the bulk density is 300 kg / m 3 The floating beads are 180kg, and the bulk density is 800 / m 3 The pottery sand is 360kg, and the bulk density is 600kg / m 3 440kg of gravel-type shale ceramsite with cylinder compressive strength of 2.5MPa, 25kg of water reducing agent, and 150kg of water.

Embodiment 2

[0038] P·O 52.5 cement 470kg, apparent density is 2017 kg / m 3 60kg of fly ash, the apparent density is 2107kg / m 3 , The bulk density is 326kg / m 3 70kg of silica fume, the particle size is 0.01~0.2mm, and the bulk density is 312 kg / m 3 The floating beads are 180kg, and the bulk density is 812kg / m 3 The pottery sand is 360kg, and the bulk density is 683kg / m 3 440kg of gravel-type shale ceramsite with cylinder compressive strength of 3.6MPa, 23kg of water reducing agent, and 160kg of water.

Embodiment 3

[0040] P·O 52.5 cement 450kg, apparent density is 2078kg / m 3 70kg of fly ash, the apparent density is 2231kg / m 3 , The bulk density is 243kg / m 3 80kg of silica fume, the particle size is 0.01~0.2mm, and the bulk density is 324 kg / m 3 The floating beads are 200kg, and the bulk density is 827kg / m 3 The pottery sand is 330kg, and the bulk density is 732kg / m 3 4. 450kg of gravel-type shale ceramsite with cylinder compressive strength of 4.3MPa, 26kg of water reducing agent, and 140kg of water.

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Abstract

The invention provides self-compacting light aggregate concrete and a preparation method thereof, and belongs to the technical field of concrete preparation. The self-compacting light aggregate concrete consists of such raw materials as cement, fly ash, silica fume, floating beads, light fine aggregate, light coarse aggregate, a water reducing agent and water. The self-compacting light aggregate concrete provided by the invention has the advantages of being low in appearance density, high in slump expansion degree and capable of avoiding floating of the floating beads; self-compacting light aggregate concrete differing in grade, especially self-compacting light aggregate concrete with strength grade above C60 and appearance density at 1400-1800kg / m<3>, can be prepared through the raw materials.

Description

technical field [0001] The invention relates to a high-strength self-compacting lightweight aggregate concrete and a preparation method thereof, belonging to the technical field of concrete. Background technique [0002] Concrete is currently the most widely used building material in the field of civil engineering. Since the invention of cement and ordinary concrete, after more than a century of development, people have continuously changed the composition of concrete, and more and more new high-performance composite concretes have emerged. Concrete is developing in the direction of high strength, low density, less environmental pollution, and convenient construction, which more embodies the concept of "green and sustainable" development of concrete. Among them, self-compacting lightweight aggregate concrete is a kind developed in recent years. It is a new type of high-performance concrete developed on the basis of self-compacting concrete and lightweight aggregate concrete....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/08C04B22/06
CPCY02W30/91
Inventor 孙占兴聂法智贾伟进
Owner 北京中联新航建材有限公司
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