Autoclaved prestressed concrete tube pile applied to marine work environment and preparation method thereof

Abstract

The invention discloses an autoclaved prestressed concrete tube pile applied to a marine work environment and a preparation method thereof. A coating layer is coated on the surface of a tube pile; a gel material consists of P.II52.5 silicate cement and a mineral admixture; the using amount of gel material is 450 to 550kg / m<3>; the using amount of mineral admixture is 30 to 50wt percent that of gel material; the admixture amount of I-level coal ash is 0 to 30wt percent that of gel material; the admixture amount of II-level coal ash is 0 to 25wt percent that of gel material; the admixture amount of ultra-fine coal ash is 0 to 20wt percent that of gel material; the admixture amount of S95-level mineral powder is 0 to 25wt percent that of gel material; the weight ratio of water and gel is 0.22 to 0.24; the water reducer is prepared by aliphatic series and polycarboxylic acid and the ratio is 1 to 2, the using amount of the water reducer is 2.1 to 2.3 wt percent of gel material; the coating layer consists of a primer, a middle paint and a finish paint; the thickness of the coating layer is 125 to 150 microns. The proportions of raw materials and parameters in a preparation process are optimized, and the specific coating layer is coated on the surface, so that the compressive strength and chlorine salt erosion resistance of the tube pile are greatly improved, the rusting risk of the tube pile is greatly reduced, and the service life of the tube pipe in the marine work environment can be greatly prolonged.

Description

technical field [0001] The invention relates to a concrete pipe pile, in particular to an autoclaved prestressed concrete pipe pile suitable for a marine environment and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] With the continuous expansion of my country's basic construction, more and more buildings or structures are located in the coastal or marine environment, so that the application of concrete pipe piles as a foundation component of buildings or structures in the above-mentioned environments is also increasing. many. However, the strength of traditional ordinary prestressed concrete pipe piles is low, and it is difficult to resist the ubiquitous chloride salt erosion in the offshore environment, which leads to premature durability failure of pipe piles. At present, in order to increase the strength, prestressed concrete pipe piles are prepared with mineral admixtures, but the autoclaved prestresse...

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Problems solved by technology

Domestic pipe pile enterprises have carried out trial production of autoclaved pipe piles, using silica fume and ultra-fine fly ash as mineral admixtures. Although the product strength can reach 80MPa, the quality is unstable and the cost is higher than autoclaved curing. There are few researches on autoclaved pipe piles in China, so the autoclaved pipe piles are currently not conducive to industrialization and promotion

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