Slag additive and its preparation method and use

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...

AI Technical Summary

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.

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