Light high-strength concrete and preparation method thereof

A high-strength concrete and lightweight technology, which is applied in the field of lightweight high-strength concrete and its preparation, can solve the problems of increased bulk density and strength discreteness, decreased concrete strength, and increased concrete bulk density, and achieves excellent work performance, improved hydration activity, and good cohesive effect

Inactive Publication Date: 2012-09-12
JIANGSU MINGHE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] my country's research on lightweight high-strength concrete started late. Due to the constraints of the strength of lightweight aggregates, it is difficult to increase the strength of concrete; increasing the strength of concrete by increasing the amount of cement will lead to an increase in the concrete density; and due to light bone The material is easy to float, and the concrete is easy

Method used

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  • Light high-strength concrete and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: a kind of lightweight high-strength concrete is mainly made of the following raw materials in weight percentage:

[0027] Cementitious material: P·I52.5 cement 12%; mineral powder 8%; fly ash 10%; silica fume 5%; among them, mineral powder, fly ash and silica fume belong to low-density cementitious materials;

[0028] Aggregate: Shale ceramsite 25%; Pottery sand 30%;

[0029] 0.4% of polycarboxylate high-performance water reducer produced by Suzhou Fuke Technology Co., Ltd. (0.2% of model 8H water reducer, 0.2% of model 5H water reducer);

[0030] Activator 0.1% (wherein the mass concentration is 85% triethanolamine 0.05%, the mass concentration is 85% triisopropanolamine 0.03%, analytically pure sodium fluorosilicate 0.02%);

[0031] Hydroxymethyl Cellulose Ether Viscosifier 0.05%,

[0032] Water 9.45%.

[0033] Among the above raw materials, the specific surface area of ​​P·I52.5 cement is 390m 2 / kg, 28d compressive strength 59Mpa; mineral powder is...

Embodiment 2

[0035] Embodiment 2: basically the same as embodiment 1, the difference is the composition of raw materials:

[0036] Cementitious material: P·I52.5 cement 11%; mineral powder 8%; fly ash 8%; silica fume 5%;

[0037] Aggregate: Shale ceramsite 28%; Pottery sand 30%;

[0038] 0.4% of polycarboxylate high-performance water reducer produced by Suzhou Fuke Technology Co., Ltd. (0.2% of model 8H water reducer, 0.2% of model 5H water reducer);

[0039] Activator 0.09% (wherein the mass concentration is 85% triethanolamine 0.05%, the mass concentration is 85% triisopropanolamine 0.02%, analytically pure sodium fluorosilicate 0.02%);

[0040] Hydroxymethyl Cellulose Ether Viscosifier 0.1%

[0041] Water 9.41%.

[0042]The formulation method of the above-mentioned lightweight high-strength concrete is as follows: (1) shale ceramsite with a percentage by weight of 28%; The hydroxymethyl cellulose ether tackifier is added into 1% water by weight, the water temperature is heated to 60...

Embodiment 3

[0043] Embodiment 3: substantially the same as Embodiment 1, the difference is the composition of raw materials:

[0044] Cementitious material: P·I52.5 cement 10%; mineral powder 12%; fly ash 7%; silica fume 6%;

[0045] Aggregate: Shale ceramsite 30%; Pottery sand 25%;

[0046] 0.4% of polycarboxylate high-performance water reducer produced by Suzhou Fuke Technology Co., Ltd. (0.2% of model 8H water reducer, 0.1% of model 5H water reducer, 0.1% of model 9H water reducer);

[0047] Activator 0.14% (wherein the mass concentration is 85% triethanolamine 0.05%, the mass concentration is 85% triisopropanolamine 0.04%, analytically pure diethanolamine 0.03%, analytically pure sodium fluorosilicate 0.02%);

[0048] Polyacrylamide tackifier 0.06%;

[0049] Water 9.4%.

[0050] The formulation method of the above-mentioned lightweight high-strength concrete is as follows: (1) shale ceramsite with a percentage by weight of 30%; The polyacrylamide tackifier is added into 1% water b...

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Abstract

The invention discloses light high-strength concrete, which is prepared from the following raw materials in percentage by weight: 10 to 15 percent of silicate cement, 8 to 12 percent of mineral powder, 6 to 10 percent of coal ash, 2 to 6 percent of wollastonite, 20 to 30 percent of ceramsite,25 to 35 percent of ceramic sand, 0.2 to 0.8 percent of high-performance water reducing agent, 0.05 to 0.3 percent of exciting agent, 0.05 to 0.8 percent of tackifier and 8 to 12 percent of water. The light high-strength concrete has the advantages that compact accumulation is realized by optimizing the grain composition of cementing materials; the mineral powder is subjected to ultrafine grinding, so that the hydrated activity of the mineral powder is improved substantially; and the using quantity of the low-density cementing materials can be increased, and the cohesiveness of slurry is improved by combining the high-performance water reducing agent, the exciting agent and the tackifier, so that the concrete slurry is high in working performance and is not segregable, and the aim of reducing the volume weight of the hardened slurry substantially is fulfilled on the basis of ensuring the mechanical property of the hardened slurry.

Description

technical field [0001] The invention relates to a concrete and a preparation method thereof, in particular to a lightweight high-strength concrete and a preparation method thereof. Background technique [0002] Lightweight high-strength concrete (HSLC) is one of the development directions of concrete technology in the world at present. It has the advantages of light weight and high strength, good durability, alkali-free aggregate reaction, good volume stability, and good thermal insulation performance. The United States, Germany, Japan and other countries have widely used HSLC in marine structures, high-rise buildings, long-span bridges and urban overpasses and other projects. [0003] my country's research on lightweight high-strength concrete started late. Due to the constraints of the strength of lightweight aggregates, it is difficult to increase the strength of concrete; increasing the strength of concrete by increasing the amount of cement will lead to an increase in t...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/40
Inventor 臧军邓明超张柏林李保亮徐洪伟
Owner JIANGSU MINGHE GRP
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