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A wear-resistant concrete mixed with nickel slag

A technology of concrete and nickel slag, applied in the field of wear-resistant concrete, can solve the problems of insufficient attention to the durability design of road cement concrete and insufficient attention to the wear resistance of cement concrete pavement, so as to save natural sand resources, widen the scope of use, and reduce the wear resistance. high grinding effect

Active Publication Date: 2016-06-29
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Cement concrete pavement has the advantages of high rigidity, high strength, no rutting, good stability, and low maintenance costs. It has been widely used in road construction in my country in recent years. Insufficient attention has been paid to durability design, especially the current highway pavement cement concrete mix ratio design specification does not have specific requirements for the wear resistance of pavement cement concrete, which directly leads to insufficient attention to the wear resistance of cement concrete pavement, and wear resistance is a common durability problem in pavement engineering in all regions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Cement P.O42.5 Ordinary Portland Cement has a mass of 335.75kg and a specific surface area of ​​490m 2 The quality of nickel slag powder / kg is 19.75kg, the quality of secondary fly ash is 39.5kg, the quality of water is 185kg, the quality of natural sand is 425.4kg, the quality of nickel slag fine aggregate is 283.6kg, and the quality of natural gravel The mass of the nickel slag coarse aggregate is 212.6kg, and the mass of the naphthalene superplasticizer is 5.93kg.

[0024] Preparation:

[0025] Mix the cement, fly ash, nickel slag powder, nickel slag, sand and stones weighed according to the ratio evenly;

[0026] Add half of the mixing water and stir until uniform;

[0027] Pour the remaining water and water reducer into the mixing pot together, and stir well.

[0028] The comparison between the nickel slag wear-resistant concrete prepared by this method and the ordinary concrete of the same grade is shown in Table 1.

[0029] Table I

[0030] name

Embodiment 2

[0032] The quality of cement P.I42.5 Portland cement is 338.3kg, and the specific surface area is 520m 2 The quality of nickel slag powder per kg is 19.9kg, the quality of secondary fly ash is 39.8kg, the quality of water is 155kg, the quality of natural sand is 367kg, the quality of nickel slag fine aggregate is 367kg, and the quality of natural gravel is 892.5 kg, the mass of nickel slag coarse aggregate is 297.5kg, and the mass of naphthalene-based superplasticizer is 1.99kg. The comparison between the nickel slag concrete prepared by this method and the ordinary concrete with the same designation is shown in Table 2.

[0033] Table II

[0034] name

Embodiment 3

[0036] Cement P.O42.5 Ordinary Portland Cement has a mass of 307.8kg and a specific surface area of ​​510m 2 The quality of nickel slag powder per kg is 26.6kg, the quality of secondary fly ash is 45.6kg, the quality of water is 175kg, the quality of natural sand is 468kg, the quality of nickel slag fine aggregate is 252kg, and the quality of natural gravel is 770kg , the quality of nickel slag coarse aggregate is 330kg, the quality of naphthalene series superplasticizer is 3.8kg, the preparation method is the same as embodiment 1.

[0037] The comparison between the nickel slag wear-resistant concrete prepared by this method and the ordinary concrete of the same grade is shown in Table 3.

[0038] Table three

[0039] name

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Abstract

The invention provides wear-resisting concrete doped with nickel slags. The wear-resisting concrete comprises the following components by weight: 270-420g of cement, 20-50g of nickel slag powder, 35-75g of coal ash, 150-190g of water, 250-500g of nickel slag fine aggregates, 210-440g of nickel slag coarse aggregates, 320-500g of sand, 740-1176g of stone and 1.8-9g of water reducing agents. Compared with common concrete, the concrete has good wear-resisting performance, the work performance of the concrete is good, and the anti-fracture strength and the compressive strength are high. Additionally, the nickel slags serving as the coarse and fine aggregates replace a part of natural gravels, the quantity of the natural gravels used for the concrete is reduced, the production cost is reduced, and therefore, the utilization rate of the nickel slags is improved and the energy and resources are saved. The concrete can be used for floors and road surfaces in building projects and can be also used for roads, road engineering and projects with a requirement for wear resistance, and accordingly the use range of the nickel slags is widened.

Description

technical field [0001] The invention belongs to the field of concrete materials, and more specifically relates to a wear-resistant concrete mixed with nickel slag. Background technique [0002] Nickel slag is an industrial solid waste discharged during the smelting of nickel-iron alloy. Nickel-iron alloy is mainly used to produce stainless steel, so nickel slag is also called stainless steel slag or nickel-iron slag. Due to the continuous and substantial increase in the demand for stainless steel in my country in recent years, a large amount of solid waste residues have also been produced. However, these waste residues have not been fully utilized. A large number of open-air piles around the smelter not only takes up valuable land resources, Moreover, it pollutes the surrounding environment, so the resource utilization of nickel slag becomes an urgent problem. [0003] In the process of smelting nickel-iron alloy, due to the difference in smelting process, the discharged was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/30
CPCY02W30/91
Inventor 杨鼎宜李浩
Owner YANGZHOU UNIV
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