Non-autoclaving high-performance prestressed high-strength concrete pile

Abstract

The invention relates to a non-autoclaving high-performance prestressed high-strength concrete (PHC) pile. Each cubic meter of pile concrete contains 400kg to 500kg of cementitious materials, high-efficiency naphthalene-based water reducer and required sandstone; wherein, the cementitous materials comprise silicate cement and self-made special mineral admixtures; the self-made special mineral admixtures comprise the following components by percentage in the total amount of the concrete: 15% to 25% of slag powder, 6% to 10% of silicate, 5% to 7% of activated silica, 2% to 4% of calcium oxide and 7% to 15% of fly ash; the special mineral admixtures account for 25% to 45% of the total amount of the concrete. By directly employing the normal-pressure steam curing process and the natural curing process after stirring-forming, the invention can satisfy the design requirements for the strength of the concrete, thereby reducing the coal consumption by more than 50%, reducing the production cost and the flue gas emission and obviously improving various properties of the manufactured PHC pile.

Description

technical field [0001] The invention relates to a concrete product, in particular to a high-performance concrete pipe pile using an autoclave-free process. Background technique [0002] Prestressed high-strength concrete pipe piles (PHC pipe piles for short) are one of the most widely used cement product materials in infrastructure construction at this stage, and have been widely used in various engineering structures such as industrial and civil buildings, road and railway bridges, port terminals, etc. . Due to different geological conditions, PHC pipe piles face the problem of harmful ion erosion during use, such as the erosion of groundwater, the penetration of soluble particles in the soil, and so on. The erosion of groundwater and the infiltration of soluble particles shorten the life of pipe piles and may threaten building safety. Therefore, technological innovation is used to improve the performance of PHC pipe piles. [0003] At the same time, in today's rapid eco...

AI Technical Summary

Problems solved by technology

But at the same time, the high-pressure curing process will also reduce some properties of concrete, and a large amount of coal needs to be burned to generate steam during the curing process, so the energy cost occupies a large proportion in the production of pipe piles, and the burning of coal will generate A large amount of flue gas, in order to make the flue gas discharge meet the emission standards, the flue gas needs to be treated, which will increase the environmental protection burden of the production enterprise