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A kind of high-strength lightweight aggregate concrete and its preparation method

A lightweight aggregate concrete and high-strength technology, applied in the field of new building materials, can solve the problems of unfavorable lightweight aggregate concrete stability, little improvement in concrete strength, and low activity of stone tailings, so as to improve the scope of comprehensive utilization and alleviate Effect of environmental pressure, improved mechanical properties and stability

Active Publication Date: 2019-08-06
GUANGXI XUTENG INDUSTRIAL GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because stone tailings have low activity and poor compatibility with other materials, it is not conducive to the stability of lightweight aggregate concrete, thus restricting its application.
[0005] The invention patent with the application number CN201010277568.X discloses an anti-seepage and anti-crack lightweight aggregate thermal insulation concrete, which uses quartz sand as the main raw material, and the prepared concrete has waterproof and anti-seepage effects, and its strength has also been improved. The stability of lightweight aggregate concrete still needs to be improved, and solid waste such as tailings is not used
The invention patent with the application number CN201410318142.2 discloses a lightweight aggregate concrete containing low-quality recycled aggregates. By adjusting the raw materials and adding specific additives, the state of the mixture can meet the requirements of use and maintain The stable state of the mixture is improved, and the workability of the concrete mixture is improved, but the strength of the concrete is not greatly improved, and it is mainly aimed at the reuse of construction waste. Further research is still needed on the reuse of stone tailings

Method used

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  • A kind of high-strength lightweight aggregate concrete and its preparation method

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Effect test

Embodiment 1

[0042] A high-strength lightweight aggregate concrete, according to parts by weight, including the following raw materials:

[0043] 500 parts of cementitious material, 500 parts of lightweight fine aggregate, 600 parts of lightweight coarse aggregate, 6 parts of admixture, and 160 parts of water.

[0044] The cementitious material is composed of 60% mass fraction of cement clinker and 40% mass fraction of cement admixture, and the mass ratio of the cement admixture is 15:10:1 stone tailings, active construction waste powder and Composition of desulfurized gypsum.

[0045] The lightweight fine aggregate includes 70% mass fraction of fine aggregate ceramsite and 30% mass fraction of active construction waste powder; the lightweight coarse aggregate includes the following components in terms of mass fraction: coarse aggregate pottery Granite 60%, stone tailings 25%, ceramic waste slag 10%, expanded graphite 5%; the fine aggregate ceramsite and coarse aggregate ceramsite include...

Embodiment 2

[0064] A high-strength lightweight aggregate concrete, according to parts by weight, including the following raw materials:

[0065] 400 parts of cementitious material, 450 parts of lightweight fine aggregate, 650 parts of lightweight coarse aggregate, 7 parts of admixture, and 150 parts of water.

[0066] The cementitious material is composed of 75% mass fraction of cement clinker and 25% mass fraction of cement admixture, and the mass ratio of the cement admixture is 20:10:1 stone tailings, active construction waste powder and Composition of desulfurized gypsum.

[0067] The lightweight fine aggregate includes 80% mass fraction of fine aggregate ceramsite and 20% mass fraction of active construction waste powder; the lightweight coarse aggregate includes the following components in terms of mass fraction: coarse aggregate pottery Granite 75%, stone tailings 10%, ceramic waste slag 10%, and expanded graphite 5%; the fine aggregate ceramsite and coarse aggregate ceramsite inc...

Embodiment 3

[0081] A high-strength lightweight aggregate concrete, according to parts by weight, including the following raw materials:

[0082] 550 parts of cementitious material, 600 parts of lightweight fine aggregate, 500 parts of lightweight coarse aggregate, 5 parts of admixture, and 170 parts of water.

[0083] The cementitious material is composed of 55% mass fraction of cement clinker and 45% mass fraction of cement admixture, and the mass ratio of the cement admixture is 10:10:1 stone tailings, active construction waste powder and Composition of desulfurized gypsum.

[0084] The lightweight fine aggregate includes 60% mass fraction of fine aggregate ceramsite and 40% mass fraction of active construction waste powder; the lightweight coarse aggregate includes the following components in terms of mass fraction: coarse aggregate pottery Granite 50%, stone tailings 30%, ceramic waste slag 15%, expanded graphite 5%; the fine aggregate ceramsite and coarse aggregate ceramsite include...

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Abstract

Disclosed is a high-strength light-weight aggregate concrete, comprising the following raw materials in parts by weight: 350-550 parts of cementing material, 450-600 parts of light-weight fine aggregate, 500-650 parts of light-weight coarse aggregate, 5-7 parts of additive, and 150-170 parts of water; the light-weight fine aggregate comprises 60-80% of fine aggregate ceramsite by mass fraction and 20-40% of active construction waste powder by mass fraction; the light-weight coarse aggregate comprises the following components by mass fraction: 50-75% of coarse aggregate ceramsite, 10-30% of stone tailings, 10-20% of ceramic waste residue, and 3-8% of expanded graphite.

Description

technical field [0001] The invention relates to the field of new building materials, in particular to a high-strength lightweight aggregate concrete and a preparation method thereof. Background technique [0002] Lightweight aggregate concrete refers to the use of lightweight aggregates, cement and water and other materials to prepare, the dry apparent density is not more than 1950kg / m 3 concrete. Compared with ordinary concrete, lightweight aggregate concrete has the characteristics of light weight, good seismic performance, and good thermal insulation durability. Many bridges and houses have also been built using lightweight aggregate concrete. [0003] Lightweight aggregate concrete uses lightweight aggregates with lower density to replace ordinary coarse aggregates. This lightweight aggregate often has lower cylindrical compressive strength than ordinary sand and gravel, so the cube compressive strength of lightweight aggregate concrete is lower. , it cannot be applie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
CPCC04B28/144C04B2111/00017C04B2201/20C04B2201/32C04B2201/50C04B18/12C04B18/16C04B7/02C04B18/027C04B14/024C04B18/0418C04B7/34C04B18/26C04B14/10C04B14/28C04B2103/302C04B2103/408C04B24/383C04B14/383
Inventor 黄聿新
Owner GUANGXI XUTENG INDUSTRIAL GROUP CO LTD
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