Concrete admixture suitable for fine aggregate as tunnel hole slag and preparation method of concrete admixture

A concrete admixture and fine aggregate technology, which is applied in the field of building materials, can solve problems such as poor appearance quality and poor workability, and achieve the effects of improving surface appearance, promoting recycling, and realizing high-quality sustainable development

Active Publication Date: 2022-05-03
ANHUI TRANSPORTATION HLDG GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the problems of poor workability, serious bleeding and poor appearance quality of concrete whose fine aggregate is tunnel slag, the present invention is based on the principle of modern material composition design and fully utilizes chemical modification technology to prepare a water-reducing, The composite admixture with the characteristics of mud powder, shrinkage reduction and crack resistance can effectively improve the workability, surface appearance and mechanical properties of concrete whose fine aggregate is tunnel slag, and improve the mechanical properties of concrete

Method used

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  • Concrete admixture suitable for fine aggregate as tunnel hole slag and preparation method of concrete admixture

Examples

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Embodiment 1

[0039]The present embodiment relates to a concrete admixture suitable for fine aggregate as tunnel slag, by weight percentage, consisting of the following raw materials: polyethylene glycol 3.5%, methacrylic acid 9.2%, acrylic acid 5.5%, ammonium persulfate 1.1%, vitamin C 0.5%, sodium hydroxide 0.4%, sodium sulfate 0.4%, hydrogen peroxide 0.8%, allyl alcohol 6.0%, polyoxyethylene ether 7.0%, mercaptoacetic acid 4%, p-benzool 1.5%, phenothiazine 4.2%, Styrene 0.8%, deionized water 55.1%, the sum of the weight percentage of raw materials is 100%.

[0040] The present embodiment relates to a concrete admixture preparation method suitable for fine aggregates as tunnel cavity slag, performed in accordance with the following steps:

[0041] Step 1: Weigh each raw material separately according to the quality ratio of the above raw materials;

[0042] Step two, the polyethylene glycol, methacrylic acid and acrylic acid in turn into three beakers, control the reaction temperature of 50 °...

Embodiment 2

[0048]Example 2 relates to a concrete admixture suitable for fine aggregates as tunnel slag, by weight percentage, consisting of the following raw materials: polyethylene glycol 4.2%, methacrylic acid 7.3%, acrylic acid 6.1%, ammonium persulfate 0.8%, vitamin C 0.7%, sodium hydroxide 0.3%, sodium sulfate 0.6%, hydrogen peroxide 0.6%, allyl alcohol 4.3%, polyoxyethylene ether 9.2%, mercaptoacetic acid 3%, p-benzenediol 2.3%, phenothiazine 3.1%, Styrene 1.1%, deionized water 56.4%. The sum of the weight percentages of raw materials is 100%. The preparation method of the present example 2 is the same as that of Example 1.

Embodiment 3

[0050] Example 3 relates to a concrete admixture suitable for fine aggregate as tunnel slag, by weight percentage, consisting of the following raw materials: polyethylene glycol 5.0%, methacrylic acid 6.1%, acrylic acid 7.4%, ammonium persulfate 0.6%, vitamin C 0.9%, sodium hydroxide 0.2%, sodium sulfate 0.8%, hydrogen peroxide 0.5%, allyl alcohol 3.5%, polyoxyethylene ether 11.4%, mercaptoacetic acid 2%, 3.0% of p-phenylphenol, phenothiazine 2.4%, Styrene 1.5%, deionized water 54.7%. The sum of the weight percentages of raw materials is 100%. The preparation method of the present embodiment 3 is the same as that of Example 1.

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Abstract

The invention provides a concrete admixture with tunnel slag as fine aggregate and a preparation method of the concrete admixture. Comprising the following components: 3.5%-5.0% of polyethylene glycol, 6.1%-9.2% of methacrylic acid, 5.5%-7.4% of acrylic acid, 0.6%-1.1% of ammonium persulfate, 0.5%-0.9% of vitamin C, 0.2%-0.4% of sodium hydroxide, 0.4%-0.8% of sodium sulfate, 0.5%-0.8% of hydrogen peroxide, 3.5%-6.0% of allyl alcohol, 7.0%-11.4% of polyoxyethylene ether, 2%-4% of mercaptoacetic acid, 1.5%-3.0% of hydroquinone, 2.4%-4.2% of phenothiazine, 0.8%-1.5% of styrene and the balance of deionized water. The invention also relates to a preparation method of the admixture. The problems that concrete with the fine aggregate being the tunnel hole slag is prone to segregation and collapse, poor in appearance quality and the like are solved, meanwhile, the performance of the concrete is effectively improved, recycling of solid waste such as the tunnel hole slag is promoted, and the concrete is simple and practical and has important practical significance and engineering application value.

Description

Technical field [0001] The present invention belongs to the field of building materials; in particular, relates to a concrete admixture suitable for fine aggregates as tunnel slag and preparation method thereof. Background [0002] With the continuous advancement of infrastructure construction, the demand for sand and gravel and other building materials has increased year by year, and the data shows that in 2020, China's ready-mixed concrete production will reach 43 billion cubic meters, while natural sand and gravel are in short supply, and it is urgent to find high-quality alternatives. On the other hand, mountainous areas and other areas have become the main battlefield of infrastructure construction, high bridge tunnel ratio is a common feature of mountain highways, in the construction of mountain highways, tunnel slag and excavated stone low utilization rate and sand and gravel material procurement and transportation is a more prominent problem, higher bridge-tunnel ratio l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C08F283/06C08F220/06
CPCC04B40/0046C08F283/06C08F220/06C04B24/2694C04B22/147C04B22/062C04B22/068C04B24/16C04B24/02C04B24/128C04B24/06Y02W30/91
Inventor 徐良孙狂飙程华才陆学元王文炳吴金方江山赵龙陈华鑫郑雎宁马子宸关博文
Owner ANHUI TRANSPORTATION HLDG GRP CO LTD
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