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Nickel slag concrete expansion agent, preparation process and concrete

A technology of concrete and expansion agent, applied in nickel slag concrete expansion agent, preparation technology and concrete field, can solve the problems of low added value of products, occupy large land resources, etc., achieve good economic and environmental benefits, high added value of products, Inflation effect lasting effect

Active Publication Date: 2018-11-27
江苏瑞海新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the annual discharge of nickel slag in my country exceeds 2 million tons, and the main method of disposal is open-air storage, which not only occupies a large amount of land resources, but also brings a series of environmental problems to the local area. The comprehensive treatment and utilization of nickel slag, Turning waste into wealth is a choice that meets the requirements of sustainable development. Now the utilization of nickel slag is mainly concentrated in cement concrete and glass. method, the invention patent with the application number 201310023003.2 discloses a nickel slag concrete, and the invention patent with the application number 201310023003.2 discloses a concrete heat storage material, etc. These methods can effectively recycle the nickel slag, but the obtained The added value of the product is low

Method used

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  • Nickel slag concrete expansion agent, preparation process and concrete
  • Nickel slag concrete expansion agent, preparation process and concrete
  • Nickel slag concrete expansion agent, preparation process and concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The present embodiment provides a kind of concrete, makes according to the following method:

[0043] Prepare 3kg of nickel slag, 4kg of desulfurized gypsum, and 3kg of high-alumina fly ash; crush the nickel slag, roughly grind it with a ball mill for 1 hour, and calcinate the desulfurized gypsum at 700°C for 2 hours; , High-aluminum fly ash mixed and ground for 20 minutes, homogenized, passed through a 80μm square hole sieve, and the nickel slag concrete expansion agent was obtained.

[0044] 0.5kg of nickel slag concrete expansion agent; 6kg of cement; 13kg of quartz sand; and 2.6kg of water were mixed to prepare the concrete of this embodiment.

Embodiment 2

[0046] The present embodiment provides a kind of concrete, makes according to the following method:

[0047] Prepare 7kg of nickel slag, 1.5kg of desulfurized gypsum, and 1.5kg of high-alumina fly ash; crush the nickel slag, roughly grind it with a ball mill for 2 hours, and calcinate the desulfurized gypsum at 800°C for 3 hours; Desulfurized gypsum and high aluminum fly ash were mixed and ground for 30 minutes, homogenized, and passed through a 100 μm square hole sieve to obtain the nickel slag concrete expansion agent.

[0048] 0.6kg of nickel slag concrete expansion agent; 6.4kg of cement; 14kg of quartz sand; and 2.8kg of water were mixed to prepare the concrete of this embodiment.

Embodiment 3

[0050] The present embodiment provides a kind of concrete, makes according to the following method:

[0051] Prepare 4.2kg of nickel slag; 3.3kg of desulfurized gypsum; and 2.5kg of high-alumina fly ash; crush the nickel slag, roughly grind it with a ball mill for 1 hour, and calcinate the desulfurized gypsum at 700°C for 2 hours; The final desulfurized gypsum and high-aluminum fly ash were mixed and ground for 20 minutes, homogenized, and passed through an 80 μm square hole sieve to obtain a nickel slag concrete expansion agent.

[0052] 0.53kg of nickel slag concrete expansion agent; 6.1kg of cement; 13.25kg of quartz sand; and 2.65kg of water were mixed to prepare the concrete of this embodiment.

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Abstract

The invention provides a nickel slag concrete expanding agent, and relates to the technical field of concrete additives. The expanding agent is prepared from the following raw materials in percentage by weight: 30-70 percent of nickel slag, 15-40 percent of desulfurized gypsum and 15-30 percent of high-alumina fly ash, so that nickel slag can be effectively recycled, and the product has a high additional value. The nickel slag concrete expanding agent has a relatively high free-expansion-rate and durable and stable expansion effect, and can be used for effectively compensating shrinkage generated in each age of concrete. The invention further provides a process for preparing the nickel slag concrete expanding agent. The preparation process is simple. The invention provides concrete, which is prepared by using the nickel slag concrete expanding agent as a raw material, and the expansion rate of the expanding agent is consistent with development of concrete strength, so that the hardened concrete has high quality, excellent compression resistance and excellent fracture resistance, and has excellent economic benefit and environment-friendly benefit.

Description

technical field [0001] The invention relates to the technical field of concrete admixture, and in particular to a nickel slag concrete expansion agent, a preparation process and concrete. Background technique [0002] During the initial setting or hardening process of concrete, due to the hydration or dehydration of the cement itself, the concrete structure will shrink, shrink and shrink in its own volume. When the shrinkage value is greater than the ultimate tensile value of the concrete, the structure of the concrete will be destroyed, resulting in cracking. As a new type of concrete admixture, concrete expansive agent can react with cement and water to produce crystals with larger volume, which can expand the volume of concrete and generate a certain prestress, which helps to control the shrinkage and cracking of concrete and protect the concrete structure. At present, there are various types of concrete expansion agents. The invention patent application with the applica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14C04B28/00
CPCC04B28/00C04B40/0042C04B2201/50C04B18/144C04B18/08C04B22/145C04B14/06C04B22/002
Inventor 张长森朱宝贵吴其胜诸华军翟牧楠
Owner 江苏瑞海新材料科技有限公司