Production method of non-autoclaved PHC (prestressed high-intensity concrete) pipe pile with good distribution convenience

Abstract

The invention relates to a production method of a non-autoclaved PHC (prestressed high-intensity concrete) pipe pile with good distribution convenience. The production method is characterized in that a slow-release water reducer is used to prepare non-autoclave concrete, distribution of the pipe pile concrete is finished before the slow-release water reducer plays its role in water reducing, centrifuging phase is entered via mold assembly and tensioning, a slow-release admixture then acts, mobility of the concrete increases gradually during centrifuging to arrive at centrifugal formation, and standing, steam-curing and demolding are performed to finish the production of the non-autoclaved PHC pipe pile. The production method has the advantages that the pipe pile concrete is of wet disperse granulate form during distribution, the problem is solved that distribution is difficult for the non-autoclaved pipe pile concrete due to excessively high viscosity, and the production method is particularly suitable for the production of thin-walled pipe piles.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing a non-autoclaved PHC pipe pile which is easy to distribute. Background technique [0002] PHC pipe pile is an important form of building foundation. It is produced and applied all over my country. The traditional PHC pipe pile is first cured in an atmospheric steam curing pool, and then passed through an autoclave to improve the concrete strength by high temperature and high pressure steam curing. The PHC pipe pile produced by autoclaving has the disadvantages of high energy consumption, high brittleness, and poor impermeability. To solve these problems, there are currently methods such as using high-performance admixtures by reducing the water-binder ratio and using high-activity admixtures. The preparation of PHC pipe piles that can meet the strength requirements only by atmospheric pressure steam curing is called autoclaved PHC pipe piles, which has bec...

AI Technical Summary

Problems solved by technology

[0005] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a method for preparing an autoclaved PHC pipe pile that is easy to distribute; it solves the problem that the autoclaved PHC pipe pile is difficult to distribute because of poor concrete workability; The non-autoclaved concrete is prepared with the same agent, so that the concrete is wet and loose powder granular when it is distributed, thus improving the problem that the non-autoclaved pipe pile concrete is difficult to distribute because the viscosity is too high and it is easy to harden. The slow-release admixture after mold closing It begins to play the role of water reduction. After it enters the centrifugation stage, the fluidity of the concrete gradually increases during the centrifugation process and it can be centrifugally formed. Finally, the preparation of the non-autoclaved PHC pipe pile is completed after static stopping, steam curing, and demoulding.