Polypropylene fiber-reinforced alkali slag cementing material

Abstract

The invention relates to a polypropylene fiber-reinforced alkali slag cementing material. When thicker steel fibers are subjected to tensile test, the phenomenon that the thicker steel fibers are pulled out due to larger size exists. The polypropylene fiber-reinforced alkali slag cementing material comprises the following slag chemical compositions in percentage by weight: 36.9 percent of silicon dioxide, 15.66 percent of aluminum oxide, 37.57 percent of calcium oxide, 9.3 percent of magnesium oxide and 0.36 percent of ferric oxide; active indexes are shown as follows: the mass coefficient is 1.69, the alkaline coefficient is 0.97, and the activity coefficient is 0.42; potassium water glass of which M is equal to 1.0, and M is equal to 2.0, sodium hydroxide with a mass fraction of greater than or equal to 96.0 percent, a polypropylene fiber with an elastic modulus of 42 GPa and tap water are adopted; the compressive and flexural strengths of an alkali slag cementing material gel sand part doped with the polypropylene fiber are improved along with the prolonging of maintenance time, and the flexural strength of the alkali slag cementing material containing 12 percent of alkali and 35 percent of water is improved. The invention can be used for the preparation of polypropylene fiber-reinforced alkali slag cementing material.

Description

Technical field: [0001] The invention relates to a polypropylene fiber reinforced alkali slag cementitious material. Background technique: [0002] During the flexural test of the base mortar of the alkali slag cementitious material, when the maximum failure load is reached, the specimen breaks suddenly, and the cross section is smooth and flat, accompanied by a loud fracture sound. Alkali slag cementitious materials are highly brittle, have almost no ductility characteristics, and have no yield stage, and failure occurs directly. [0003] From the analysis of the microscopic morphology of alkali slag cementitious materials, whether it is rice stalks, wheat straws, corn stalks, or relatively thick steel fibers, they are closely combined with the matrix, and the transition zone is complete and compact. , during the tensile test, there will be a phenomenon that the thicker steel fibers are pulled out. [0004] In order to solve the problem of high brittleness of the alkali s...

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Problems solved by technology

[0004] In order to solve the problem of high brittleness of the alkali slag cementitious material, referring to the practice of th

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