Pressure steam curing-free prestressed high-strength concrete pipe pile and method for producing same

Abstract

The invention discloses a pressure steam curing-free prestressed high-strength concrete pipe pile and a method for producing the same. The concrete of the pipe pile consists of a cementing material, a water reducing agent and sandstone, wherein each cubic meter of the concrete contains 420-500 kilograms of the cementing material, and the cementing material consists of 59-78.8% of Portland cement and 21.2-41% of special mineral admixtures, wherein the special mineral admixtures consist of superfine slag powder, superfine quartz sand powder, bentonite and slag powder, and each component of the special mineral admixtures accounts for the total mass of the cementing material as follows: 15-25% of the superfine slag powder, 5-10% of superfine quartz sand powder, 0.2-1% of the bentonite and 1-5% of the slag powder. The invention aims to provide the pressure steam curing-free prestressed high-strength concrete pipe pile which only adopts atmospheric steam curing and short-term natural suspending and can satisfy the use requirements without a pressure steam curing technology, coal consumption can be reduced, the production cost is lowered, smoke emission is reduced ,and the environmental protection loads of enterprises are relieved.

Description

technical field [0001] The invention relates to a concrete pipe pile product, in particular to a pressure-free steaming prestressed high-strength concrete pipe pile. Background technique [0002] Today, with the rapid economic development, energy shortage and environmental pollution have become important factors restricting the development of the cement products industry. Continue to carry out technological improvement and innovation to improve the use of energy, reduce production costs, and protect the environment. [0003] Prestressed high-strength concrete pipe piles (PHC pipe piles) are the most commonly used cement product components in foundation construction at the present stage. In the production process, the cementitious material and sand are usually mixed and stirred, and after a centrifugal process, a combination of atmospheric pressure steam curing process (80-85°C) and high-pressure steam curing process (pressure 1MPa, 180-200°C) is used. It is prepared by curi...

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Problems solved by technology

At the same time, the high-pressure maintenance process consumes a lot of heat energy, and the combustion of coal will also produce a large amount of flue gas. In order to make the flue gas emission meet the emission standards and not pollute the environment, the flue gas needs to be treated, which greatly increases the production cost. Increase the environmental protection burden of production enterprises