Block stone/chip stone self-compaction concrete

A technology for self-compacting concrete and rubble, applied in the field of building materials, can solve the problems of high cost and difficult control of the quality of rubble concrete, and achieve the effects of low cost, saving labor resources, and no noise pollution.

Inactive Publication Date: 2013-10-16
GUIZHOU HIGHWAY ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has led to the difficulty in controlling the quality of the flake concrete and the high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of block flake self-compacting concrete, comprising the following steps:

[0022] (1) Put the large rocks / flakes with a maximum particle size of no more than 1.2m directly into the construction warehouse, and the accumulation rate of the flakes is 50%, forming a flake body with certain gaps;

[0023] (2) Then pour superfluid self-compacting concrete with a slump of 250mm and a slump expansion of 650mm on the rubble body, relying on its own weight to completely fill the gaps in the rubble, and the superfluid self-compacting concrete will form a complete and dense structure with the rubble after hardening , Concrete structure with low heat of hydration.

[0024] Among them: flakes: clean, no weathering, hard texture, no mud, saturated water compressive strength not less than 40MPa, maximum particle size 3 / 4 of the structural cross-sectional size, the minimum particle size should not be less than 30cm, and the particle size should not exceed 10% if les...

Embodiment 2

[0031] A preparation method of block flake self-compacting concrete, comprising the following steps:

[0032] (1) Put the large stones / rocks with a maximum particle size of no more than 1.2m directly into the construction warehouse, and the accumulation rate of the rocks is 60%, forming a rock body with certain gaps;

[0033] (2) Then pour superfluid self-compacting concrete with a high slump of 290mm and a high slump expansion of 800mm on the rubble body, relying on its own weight to completely fill the gaps in the rubble, and the superfluid self-compacting concrete will form a complete structure with the rubble after hardening , dense, low heat of hydration concrete structure.

[0034] Among them: flakes: clean, no weathering, hard texture, no mud, saturated water compressive strength not less than 40MPa, maximum particle size 3 / 4 of the structural cross-sectional size, the minimum particle size should not be less than 30cm, and the particle size should not exceed 10% if les...

Embodiment 3

[0041] A preparation method of block flake self-compacting concrete, comprising the following steps:

[0042] (1) Put the large stones / flakes with a maximum particle size of no more than 1.2m directly into the construction warehouse, and the accumulation rate of the flakes is 55%, forming a flake body with certain gaps;

[0043] (2) Then pour superfluid self-compacting concrete with a slump of 270mm and a slump expansion of 750mm on the rubble body, relying on its own weight to completely fill the gaps in the rubble, and the superfluid self-compacting concrete will form a complete and dense structure with the rubble after hardening , Concrete structure with low heat of hydration.

[0044] Among them: flakes: clean, no weathering, hard texture, no mud, saturated water compressive strength not less than 40MPa, maximum particle size 3 / 4 of the structural cross-sectional size, the minimum particle size should not be less than 30cm, and the particle size should not exceed 10% if le...

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Abstract

The invention discloses block stone/chip stone self-compaction concrete. The block stone/chip stone self-compaction concrete is characterized in that block stone/chip stone is directly placed in a construction bin to form a chip stone body, wherein the accumulation rate of the chip stone is 50-60%; and then superfluid self-compaction concrete is poured on the chip stone body and is hardened so as to obtain the block stone/chip stone self-compaction concrete, wherein the slump SL of the superfluid self-compaction concrete is greater than or equal to 250 mm and less than or equal to 290 mm, and the slump flow SL is greater than or equal to 650 mm and less than or equal to 800 mm. The block stone/chip stone self-compaction concrete has the advantages of low construction cost, high construction speed, quality assurance, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a block stone self-compacting concrete. [0002] Background technique [0003] Rubble concrete is a commonly used building material for structural engineering in foundation construction (such as rubble concrete dams, rubble concrete retaining walls, rubble concrete culverts, etc.). Add flakes or block stones to form a flake concrete complex. Due to the low working performance of traditional ordinary concrete, if the amount of flakes added is too large, it is easy to cause gaps and cavities between the flakes, and the concrete and flakes cannot be well combined, reducing the Comprehensive performance of flake concrete. Therefore, the code stipulates that the amount of rubble in rubble concrete should not exceed 25% of the total volume of rubble concrete. This has just resulted in that the quality of flake concrete is difficult to control and the cost is high. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 母进伟石大为周大庆胡涛任达成蒋正武尤诏郑文袁立徐贵荣
Owner GUIZHOU HIGHWAY ENG GRP
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