Concrete admixture for PHC pipe pile using superfine molybdenum tailings and pipe pile

Abstract

The invention discloses a concrete admixture for a PHC pipe pile using superfine molybdenum tailings and the PHC pipe pile. The preparation method of the concrete admixture for the PHC pipe pile comprises the steps of carrying out filter pressing or filtering dehydration on the superfine molybdenum tailings, and drying; drying the desulfurized gypsum; and proportioning the dried superfine molybdenum tailings and desulfurized gypsum according to the mass ratio of (9-10): 1, and grinding the mixture in a ball mill until the specific surface area of the material is 700m < 2 > / kg-1000m < 2 > / kg to obtain the concrete admixture. The concrete admixture is prepared from the superfine molybdenum tailings, the concrete admixture is used for preparing the PHC pipe pile, the compressive strength, compactness and durability of the PHC pipe pile concrete can be improved, the production cost of the pipe pile can be reduced, resource utilization of the molybdenum tailings and the desulfurized gypsum can be achieved at the same time, and remarkable environmental benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of PHC pipe pile preparation, in particular to a concrete admixture and pipe pile for PHC pipe piles using ultrafine molybdenum tailings. Background technique [0002] Prestressed high-strength concrete pipe piles, referred to as PHC pipe piles, are widely used in construction, transportation, water conservancy and other engineering constructions. The compressive strength of PHC pipe pile concrete is required to be above 80MPa. At present, it is generally necessary to use natural quartz powder and the like as siliceous raw materials when preparing PHC pipe piles, and its cost is relatively high, which will increase the production cost of PHC pipe piles. The amount of slag powder and fly ash in the process of partially preparing PHC pipe piles is also relatively large, which also increases the production cost to a certain extent. [0003] With the development of the mining industry, the comprehensive utiliza...

AI Technical Summary

Problems solved by technology

The concrete admixture for PHC pipe piles is prepared by grinding ultra-fine molybdenum tailings and desulfurized gypsum. Using this concrete admixture to prepare PHC pipe piles can meet the requirements of PHC pipe pile concrete strength and other performance requirements, saving The production cost of PHC pipe piles realizes the resource utilization of molybdenum tailings and desulfurized gypsum, and solves the problem of environmental pollution caused by a large amount of molybdenum tailings stockpiling, which has significant environmental and economic benefits.

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