High-activity granulated blast furnace slag and preparation method thereof

Abstract

The invention discloses a high-activity granulated blast furnace slag and a preparation method thereof. In the process of grinding the granulated blast furnace slag, and a solid synergist is added in a ratio of 10-30%, through commonly grinding, the granulated blast furnace slag with a specific surface area of 350-600 m2 / kg is obtained. The high-activity granulated blast furnace slag can be doped in concrete and cement products, because the granulated blast furnace slag has high activity and a certain water reducing property, while the water consumption is appropriately reduced, the early strength development of concrete and cement products can be promoted; meanwhile, concrete and cement products doped with the high-activity granulated blast furnace slag can achieve the design performance requirements thereof in advance under the condition of natural curing or non-autoclave normal-pressure steam curing; and the corrosion resistance and durability of concrete and cement products doped with the high-activity granulated blast furnace slag are also obviously improved. The main components of the solid synergist are as follows: active silicon, sulfate, high-activity calcium oxide, a small amount of organic matters, a moderate amount of other inorganic materials, so that the solid synergist belongs to a high-activity compound material.

Description

technical field [0001] The invention relates to a highly active slag micropowder in the field of building materials and a preparation method thereof. Background technique [0002] The use of cement and concrete products can improve the construction efficiency of construction projects. After the concrete is poured, if the climate is hot and the air is dry, and the maintenance is not carried out in time, the moisture in the concrete will evaporate too quickly, forming a dehydration phenomenon, which will make the cement particles that have formed a gel It cannot be fully hydrated, cannot be converted into stable crystals, and lacks sufficient cohesive force, so that flakes or powders will fall off on the concrete surface. In addition, when the concrete does not have sufficient strength, premature evaporation of water will also cause Large shrinkage deformation occurs, and shrinkage cracks appear, which affects the durability and integrity of concrete. Therefore, during the gr...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of slag micropowder with high activity, wide application field and multi-functionality to improve the performance of concrete, aiming at the common problems of low activity, limited application field and relatively single function of existing slag micropowder. At the same time of comprehensive performance, it also achieves the purpose of improving production efficiency, reducing production cost, energy saving and emission reduction

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