Non-autoclaved prestressed high-strength concrete tubular pile and preparation method thereof

Abstract

The invention discloses a non-autoclaved prestressed high-strength concrete tubular pile and a preparation method thereof. Concrete is prepared from a binding material, a polycarboxylate superplasticizer, coarse and fine aggregates and water, wherein the binding material is prepared from cement and mineral power and accounts for 15-20% the total mass of the concrete, the water reducing rate of the polycarboxylate superplasticizer is higher than 25%, the polycarboxylate superplasticizer accounts for 0.2-0.5% the total mass of the concrete, the coarse and fine aggregates include coarse aggregates and fine aggregates, the coarse aggregates are 5-25 mm continuous grading granite stones and account for 45-55% the total mass of the concrete, the fine aggregates are nickel mineral slag sand with the fineness modules being 2.5-3.2 and account for 25-30% the total mass of the concrete, and water accounts for 5.0-6.0% the total mass of the concrete. The compressive strength of the obtained PHC is larger than 85 MPa, and the appearance quality, dimensional deviation and mechanical property meet the national tubular pile standard requirements.

Description

technical field [0001] The invention relates to an autoclaved-free prestressed high-strength concrete pipe pile (PHC) technology, in particular to an autoclaved-free prestressed high-strength concrete pipe pile prepared by utilizing nickel ore slag sand and a method thereof. Background technique [0002] With the continuous development of the economy, the continuous improvement of the quality of living standards, the continuous enhancement of the awareness of resource protection, and the gradual increase in the demands for the living environment, in recent years, the concept of sustainable development of protecting the natural environment, optimizing the use of resources, and seeking harmony between man and nature is important. The topic has been raised. The future development conditions of the construction industry must be to protect the environment to meet human needs, research and develop technologies that can be most effective and consume the least resources and can be co...

AI Technical Summary

Problems solved by technology

[0004] 1. The coal consumption of traditional autoclaved maintenance is too high and the air pollution is high. High-pressure autoclaved maintenance needs to consume 3 kg of 5000 kcal standard coal to produce 7.5 kg of carbon dioxide per meter of pipe pile;

[0005] 2. The use of traditional autoclaved high-pressure vessels is not safe, and high-pressure autoclaved maintenance of pipe piles has operator safety accidents and casualties;

[0006] 3. There is always a moment when traditional natural resources, coarse and fine aggregate, sand and gravel are mined;

[0007] 4. The traditional production of high-strength prestressed concrete pipe piles requires high-quality coarse and fine aggregates and cementitious materials. High-quality resources will always be mined at the moment