Seawater-blended coral-potassium magnesium phosphate cement-based material and preparation method thereof and maintenance method of test piece made of material

Abstract

The invention discloses a seawater-blended coral-potassium magnesium phosphate cement-based material and a preparation method thereof and a maintenance method of a test piece made of the material, and relates to the field of civil engineering materials. The seawater-blended coral-potassium magnesium phosphate cement-based material is prepared by mixing coral-potassium magnesium phosphate cement-based powder with seawater, wherein the coral-potassium magnesium phosphate cement-based powder is prepared from, by mass, 75%-90% of potassium magnesium phosphate cement, 5%-15% of coral micropowder and 5%-10% of nickel slag powder. The seawater-blended coral-potassium magnesium phosphate cement-based material is controllable in setting time, high in early strength, continuously increased in later strength and high in seawater erosion resistance. The preparation method of the seawater-blended coral-potassium magnesium phosphate cement-based material is simple in process, economical in energy, environmentally friendly and low in cost. According to the test piece made of the seawater-blended coral-potassium magnesium phosphate cement-based material, shrinkage and deformation of a test piece can be reduced, and the compressive strength surplus ratio under long-term seawater soaking can be increased.

Description

technical field [0001] The invention relates to the field of civil engineering materials, and in particular to a seawater-mixed coral potassium magnesium phosphate cement-based material, a preparation method thereof, and a test piece maintenance method. Background technique [0002] With the development of the ocean and the competition for ocean rights and interests, the number of ocean engineering constructions is increasing day by day. For the construction of islands and reefs far away from the mainland, all required materials need to be transported from the mainland. The transportation cost is very expensive, and the transportation is subject to wind and waves. And other natural conditions, it is difficult to guarantee the construction period. Therefore, the development of engineering construction materials that can be obtained locally on islands and reefs is one of the urgent problems to be solved in island and reef engineering construction. [0003] Among the many isla...

AI Technical Summary

Problems solved by technology

However, coral debris and seawater are rich in Cl - , SO 4 2- , Mg 2+ Plasma will have a serious impact on the setting time and strength of ordinary Portland cement series materials, and because the hardened body of ordinary Portland cement has a porous structure, the resistance to chloride ion diffusion and seawater erosion are poor, so the durability Difficult to be guaranteed, unable to meet the increasingly diverse needs of island and reef engineering construction

[0004] In order to improve the performance of coral cement-based materials mixed with seawater, it has been improved by increasing C in Portland cement. 3 A.C 4 AF content, mineral admixture, coral cleaning with fresh water, fresh water mixing and curing methods for Portland cement-based materials, but due to the inherent defects of Portland cement hardened body structure, its early strength, chloride ion diffusion resistance and resistance The improvement of seawater erosion ability is limited, so the obtained seawater mixed coral portland cement-based material has the defects of slow setting, low early strength, poor resistance to chloride ion diffusion and seawater erosion resistance

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