A kind of slag additive and its preparation method and application

An additive and slag technology, which is applied in the field of slag additives and its preparation, can solve the problems of early strength decline, can not meet requirements well, can not achieve mechanical performance indicators, etc. Effect

Inactive Publication Date: 2016-05-18
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the introduction of slag, the hydration process and strength development of the cementitious material system have changed, especially when the slag content is large, the early strength of the system will be significantly reduced and the mechanical properties cannot be achieved.
In order to solve the problem of active excitation of slag, there are methods such as physical excitation and chemical excitation, but they cannot meet the requirements well in terms of structural durability and economic feasibility.

Method used

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  • A kind of slag additive and its preparation method and application
  • A kind of slag additive and its preparation method and application
  • A kind of slag additive and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh the raw materials of each component according to the following ratio: ethylene glycol: 17%, diethylene glycol: 14%, glycerol: 12%, lithium sulfate 12%, sodium sulfate: 2%, sodium thiocyanate: 15% , Sodium hydroxide: 5%, water 23%; mix and stir evenly to obtain the slag activation enhancer.

[0032] The amount of the slag additive prepared in this example used as a slag activation enhancer is 0.1% of the slag mass.

Embodiment 2

[0034] Weigh the raw materials of each component according to the following proportions: ethylene glycol: 8%, diethylene glycol: 2%, glycerol: 2%, lithium sulfate 6%, sodium sulfate: 3%, sodium thiocyanate: 10% , Sodium hydroxide: 3%, water 66%; mix and stir evenly to obtain the slag activation enhancer.

[0035] The amount of the slag additive prepared in this example used as a slag activation enhancer is 0.3% of the slag mass.

Embodiment 3

[0037] Weigh the raw materials of each component according to the following ratio: ethylene glycol: 3%, diethylene glycol: 7%, glycerol: 6%, lithium sulfate 2%, sodium sulfate: 5%, sodium thiocyanate: 4% , Sodium hydroxide: 2%, water 71%; mix and stir evenly to obtain the slag activation enhancer.

[0038] The amount of the slag additive prepared in this example used as a slag activation enhancer is 0.5% of the slag mass.

[0039] Using the slag activated enhancer prepared in the above three examples, the cement mortar test was carried out according to the requirements of GB / T17671-1999. Calculated according to GB / T18046-2008, the activity index of slag. The obtained mortar strength and activity index results are shown in the following table:

[0040]

[0041] Table 1 shows that: using the special activation enhancer of the present invention, the 7-day activity index of slag is increased by 10-14%, and the 28-day activity index is increased by 5-9%.

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Abstract

The invention belongs to the technical field of building materials and relates to a slag additive and its preparation method and use. The slag additive comprises, by weight, 5-50% of glycol, 5-30% of diglycol, 10-50% of glycerol, 10-50% of lithium sulfate, 0.1-5% of sodium sulfate, 0.1-5% of sodium sulfocyanate, 1-10% of sodium hydroxide and 15-95% of water. A use ratio of the slag additive in slag is in a range of 0.1-0.5%. The slag additive can improve slag seven-day activity by 10-15% and slag 28-day activity by 5-10%.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a slag additive and its preparation method and application. Background technique [0002] With the development of my country's economy, energy and environmental issues have gradually become the focus of attention. my country is a big country in the building materials industry, especially the cement and concrete industries have a great impact on resources and the environment. According to statistics, for the production of 1 ton of cement, about 1.2 tons of limestone and 150 kg of standard coal are consumed, and about 0.87 tons of CO2 are emitted at the same time. 2 . Globally, CO emissions from the cement industry into the atmosphere 2 accounting for about 7% of total emissions. Therefore, while ensuring the steady development of economic construction, attention should be paid to reducing energy consumption and protecting the environment in the building materials indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/02
Inventor 张永娟赵明张雄
Owner TONGJI UNIV
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