Production method of non-residual slurry non-autoclaved prestressed concrete pipe pile

Abstract

The invention relates to a production method of a non-residual slurry non-autoclaved prestressed concrete pipe pile. The production method comprises the following steps: (1) sequentially adding fine aggregate, coarse aggregate, cement, mineral powder, a mineral additive, water and a water reducing agent into a reaction kettle, and evenly stirring to obtain a concrete mixture; (2) prestressed tensioning the concrete mixture after material distribution and die assembling; (3) centrifuging the concrete mixture after prestressed tensioning, and sequentially carrying out low speed, low medium speed, medium speed and high speed centrifugation steps in centrifugation without producing residual slurry in the centrifugation process; (4) placing the centrifuged concrete mixture into a steam maintenance pool for steam maintenance. According to the production method, after multiple experiments, through contrastive analysis, the nanoscale mineral additive is added, and by matching with the compound high-performance water reducing agent and adjusting existing pipe pile centrifugation and steam maintenance steps, the non-residual slurry centrifugation and one-time demoulding strength of C80 are realized, so that the working procedures of pouring residual slurry and steam maintenance are eliminated, and the environmental pollution and energy consumption of enterprises are greatly reduced.

Description

technical field [0001] The invention belongs to the field of concrete pipe piles, in particular to a production method of no-remaining slurry-free autoclaved prestressed concrete pipe piles. Background technique [0002] The existing production process of concrete pipe piles is divided into reinforcement cutting, cage weaving, assembly, concrete pouring, tensioning, centrifugation, steam curing and autoclaving. Two links have always been a headache for pipe pile enterprises: one is the large amount of residual pulp produced by centrifugation, which not only contains a lot of water, but also contains a lot of cement and admixture components, which directly affects the quality of the pipe pile after forming. The recovery and reuse of residual stock is less cost-effective, and a large amount of energy consumption will be generated in the process of recovery and reuse; the second is a large amount of energy consumption generated by autoclaving, and a large pressure vessel must b...

AI Technical Summary

Problems solved by technology

Two links have always been a headache for pipe pile enterprises: one is the large amount of residual slurry produced by centrifugation, which not only contains a large amount of water, but also contains a lot of cement and admixture components, which directly affects the quality of the pipe pile after forming. The recovery and reuse of residual pulp is less cost-effective, and a large amount of energy consumption will be generated in the process of recovery and reuse; the second is a large amount of energy consumption generated by autoclaving, and a large pressure vessel must be used, there is a serious problem production safety hazard

[0005] After comparison, the above-mentioned patent documents are quite different from the present application in terms of the raw materials used in the pipe pile and the centrifugal process.

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