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Concrete with a bulk density exceeding 5,000 kilograms per cubic meter and its preparation method

A concrete and bulk density technology, which is applied in the field of concrete materials, can solve the problems of affecting the cohesion and water retention of concrete, the adverse effect of heavy concrete construction performance, and the high aggregate density, etc., to improve the workability of the product, excellent penetration and emulsification , the effect of reducing water consumption

Active Publication Date: 2021-12-21
成都精准混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned related technologies, raw materials such as barite, iron ore, and steel scrap are used as aggregates, and the aggregate density is high, especially the bulk density exceeds 5000kg / m 3 At the same time, there is a higher requirement for the density of the aggregate, which will have a certain adverse effect on the stability of the concrete, affect the cohesion and water retention of the concrete, and have a certain adverse effect on the construction performance of the heavy concrete.

Method used

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  • Concrete with a bulk density exceeding 5,000 kilograms per cubic meter and its preparation method
  • Concrete with a bulk density exceeding 5,000 kilograms per cubic meter and its preparation method
  • Concrete with a bulk density exceeding 5,000 kilograms per cubic meter and its preparation method

Examples

Experimental program
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Effect test

Embodiment

[0033] The raw materials involved in this application are all commercially available, and the models and sources of the raw materials are shown in Table 1.

[0034] Table 1 Specifications, Models and Sources of Raw Materials

[0035]

[0036]

[0037] The iron sand used in the following examples is provided by Henan Tengze Environmental Protection Technology Co., Ltd. There are two specifications, one with an apparent density of 6820kg / m 3 , fineness 3.3; the other is the apparent density of 7550kg / m 3 , fineness 3.1.

preparation example 1

[0039] Preparation example 1: the preparation method of additive, comprises the steps:

[0040] Weigh 2.5kg of isopentenyl polyoxyethylene ether, stir at a speed of 100 rpm, heat to 90°C, add 700g of nonylphenol polyoxyethylene ether, add 300g of hydrogen peroxide dropwise at a constant speed for 60min, keep stirring for 120min; cool down To 55°C, add 250g of vitamin C, 750g of sodium gluconate and 500g of calcium gluconate, and continue stirring for no less than 20 minutes to prepare the admixture.

preparation example 2

[0041] Preparation example 2: the preparation method of additive, comprises the steps:

[0042] Weigh 2.5kg of isopentenyl polyoxyethylene ether, stir at a speed of 100 rpm, heat to 90°C, add 250g of allyl polyoxyethylene ether, 200g of nonylphenol polyoxyethylene ether and 250g of methyl alkene Propyl polyoxyethylene ether, add 300g of hydrogen peroxide dropwise at a constant speed for 60 minutes, keep stirring for 120 minutes; cool down to 55°C, add 250g of vitamin C, 750g of sodium gluconate and 500g of calcium gluconate, and continue stirring for no less than 20 minutes to prepare the admixture . Referring to GB / T8077-2012 "Concrete Admixture Homogeneity Test Method", the water-reducing rate was tested, and the water-reducing rate of the admixture prepared in Preparation Example 2 was 35%.

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Abstract

The application discloses a concrete with a bulk density exceeding 5,000 kilograms per cubic meter and a preparation method thereof, relating to the technical field of concrete materials. A concrete with a bulk density exceeding 5,000 kilograms per cubic meter, mainly made of the following concrete raw materials in parts by weight: 170-180 parts of water, 4200-4400 parts of iron sand, 6.8-13.6 parts of admixture, and 3-6 parts of ferrocene , 3.5-5 parts of hydroxyl-terminated polybutadiene, 650-750 parts of cement; the admixture is mainly made from the following admixture raw materials in weight percentage: hydrogen peroxide 5.5-6.5%, sodium gluconate 14-16%, core material 12.5‑15.5%, calcium gluconate 9‑11%, vitamin C 4.5‑5.5%, and the rest is prenyl polyoxyethylene ether. It has the advantages of good construction performance, no bleeding phenomenon, and can be used for pumping construction. The preparation method has the advantage of improving product workability.

Description

technical field [0001] The present application relates to the technical field of concrete materials, in particular to a concrete with a bulk density exceeding 5,000 kilograms per cubic meter and a preparation method thereof. Background technique [0002] Heavy concrete is concrete with a large bulk density, and the bulk density generally exceeds 2800kg / m 3 . Heavy concrete is usually made of dense heavy aggregate mixed with cementitious materials such as strontium cement and barium cement. Heavy concrete is opaque to x-rays and gamma rays and has excellent radiation protection. Heavy concrete has been gradually used in box girder counterweights, viaducts, nuclear power projects, hospitals, military bases, building floor parts, dam underwater bottom sealing projects, nuclear industry and tunnels and other fields. [0003] At present, the commonly used heavy concrete uses barite, iron ore, steel chips and other raw materials as aggregates, which can significantly increase t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/20C04B14/34C04B24/40C04B24/26C04B24/32C04B22/068C04B24/06C04B24/38
Inventor 王小均刘作科程玉凤黄美珍
Owner 成都精准混凝土有限公司
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