A cement-based shrinkage-free grouting material doped with phosphorus slag powder and a using method thereof

Abstract

The invention relates to a cement-based shrinkage-free grouting material doped with phosphorus slag powder and a using method thereof. The cement-based shrinkage-free grouting material comprises common silicate cement, the phosphorus slag powder, ultrafine slag powder, flue gas desulfurization gypsum, medium sand, fine sand, an expanding agent, sepiolite powder, a water reducer, an antifoaming agent and a water-retaining agent. For the phosphorus slag powder, the average particle size of is 20-40 [mu]m, the weight percent of the residue on sieve having a size of 45 [mu]m is not more than 25%, the specific surface area is 350-400 m<2> / kg, and the quality factor K is 1.0-1.3. For the ultrafine slag powder, the average particle size of is 10-20 [mu]m, the specific surface area measured by a nitrogen adsorption method is 600-700 m<2> / kg, and the quality factor K is 1.7-2.0. The ultrafine slag powder has high gelatinization activity which is almost equal to or even slightly superior to the gelatinization activity of 52.5 common silicate cement. The grouting material adopts a composite gelatinization material and can be used on sites by adding water and stirring. The grouting material has excellent performances, such as good fluidity, no shrinkage, rapid intensity development in the earlier period, high intensity in the later period, good anti-permeability and good erosion resistance. The grouting material is suitable for bar splicing and fixation of supports, etc., and is also suitable for grouting of prefabricated parts, cementation of fissures for prestressed bridges, modification, reinforcement and repair of concrete constructions, and the like.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a cement-based non-shrinkage grouting material mixed with phosphorus slag powder and a use method thereof. Background technique [0002] Cement-based grouting material is a dry-mixed material composed of cement as the base material, adding natural high-strength aggregates and concrete admixtures in an appropriate amount. After mixing with water, it has the characteristics of high fluidity, early strength, high strength and micro-expansion. With the rapid development of the national economy, people's demand for buildings is also constantly developing. Many existing buildings can no longer meet the requirements of modern life in terms of appearance and function. They are in urgent need of reinforcement and reconstruction, and a large amount of grouting materials are needed; With the massive construction of infrastructure, many factories and enterprises with l...

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Problems solved by technology

Coupled with the accumulation over the years, the stock is amazing! Such a large amount of phosphorus slag is currently mainly piled up in the form of industrial waste, which not only takes up a lot of land, but also pollutes the soil and water near the piled area.

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