Solid-waste-based high-iron sulphoaluminate maritime work cementing material as well as preparation method and application thereof

Abstract

The invention belongs to the resource recycling industry, and relates to comprehensive utilization of solid wastes, in particular to a solid-waste-based high-iron sulphoaluminate maritime work cementing material as well as a preparation method and application thereof. The high-iron sulphoaluminate cement is prepared from the following raw materials in parts by mass: 70 to 80 parts of solid waste-based high-iron sulphoaluminate cement clinker, 5 to 10 parts of desulfurized gypsum, 5 to 10 parts of limestone tailings, 10 to 20 parts of steel slag, 0.15 to 0.2 part of water reducing agent, 0.05 to 0.1 part of retarder and 2 to 4 parts of silica fume. The concrete has the characteristics of quick hardening, early strength, high strength, high compactness, high permeability resistance and the like, is particularly resistant to seawater erosion, has excellent seawater erosion resistance and carbonization resistance, and can effectively prolong the durability of marine concrete engineering.

Description

technical field [0001] The invention belongs to the resource recycling industry and relates to the comprehensive utilization of solid waste, in particular to a solid waste-based high-iron sulfoaluminate marine cementitious material and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Portland cement is mainly used in the construction of marine concrete projects. However, Portland cement is easily deteriorated and damaged after long-term seawater erosion, wave erosion and carbonization in the marine environment, resulting in its service life much lower than the design life, resulting in resources. Serious waste of waste, you can try t...

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Problems solved by technology

[0003] Portland cement is mainly used in the construction of marine concrete projects. However, Portland cement is easily deteriorated and damaged after long-term seawater erosion, wave erosion and carbonization in the marine environment, resulting in its service life much lower than the design life, resulting in resources. The serious waste of the Portland cement can be tried to improve the durability of the material by adding mineral powder and other active mineral admixtures to the Portland cement. Although there is a certain effect, it has not fundamentally solved the slow and early hydration reaction of the Portland cement. Low strength, poor seawater erosion resistance and other problems, therefore, a fundamental breakthrough is urgently needed for marine cement

[0004] Because sulfoaluminate cement has the characteristics of rapid hydration reaction, early strength, high strength, high frost resistance, high density, and high impermeability, some scholars have carried out related research on using it as marine cement. The research found that sulfur Compared with portland cement-based marine cementitious materials, aluminate cement has excellent antifreeze and seawater erosion properties, and is suitable for use as marine cement. However, due to its special mineral composition, the pH value of its hydration liquid phase is relatively low. Low, which in turn leads to insufficient carbonation resistance of materials, which seriously affects the durability life of marine engineering buildings

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