Remained slurry-free and non-autoclaved prestressed concrete pipe pile

A technology for concrete pipe piles and prestressing, applied in the field of concrete pipe piles, can solve the problems of hidden dangers of production safety, low cost performance of residual slurry recovery and reuse, affecting the quality of pipe piles, etc., and achieves improved compactness, good promotion value, The effect of reducing environmental pollution and energy consumption

CN103482913AInactive Publication Date: 2014-01-01TIANJIN YONGSHENG XINHE PILE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-01-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a remained slurry-free and non-autoclaved prestressed concrete pipe pile, comprising the following raw components in parts by weight: 300-350 parts of cement, 60-80 parts of mineral powder, 600-700 parts of fine aggregate, 1200-1400 parts of coarse aggregate, 80-100 parts of running water, 35-40 parts of mineral additive, and 8-12 parts of water reducer. After a lot of experiments and contrastive analysis of the remained slurry-free and non-autoclaved prestressed concrete pipe pile, remained slurry-free centrifugation is achieved and one-time demoulding strength achieves C80 by adding a nano-sized mineral additive, matching with complexed high-performance water-reducer, and adjusting the centrifuging and steaming steps of the existing pipe pile. The procedures of removing the remained slurry and steaming are removed; the environmental pollution and energy consumption of enterprises are greatly reduced; the endurance quality of concrete is greatly improved.
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Description

technical field

[0001] The invention belongs to the field of concrete pipe piles, in particular to an autoclaved prestressed concrete pipe pile without residual slurry. 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 be used, there is a ser...

Examples

Embodiment 1

[0038] A kind of autoclaved prestressed concrete pipe pile without residual slurry (diameter 400mm, pipe wall thickness 95mm), its raw material components and weight (Kg) are:

[0039]

[0040] Described mineral additive is solid microbead, and its raw material component and percentage content are respectively:

[0041]

[0042] The loss on ignition of the above-mentioned solid microspheres is ≤5%, and the density of the spheres is 2.52Kg / dm 3 , the apparent density in the natural state is 0.67Kg / dm 3 , the apparent density after compression is 0.89Kg / dm 3 , water content ≤ 1%, water demand ratio of mortar sand is 90±1%, fineness d 90 ≤10μm.

[0043] The steps of the production method of the above-mentioned non-residual slurry-free autoclaved prestressed concrete pipe pile are:

[0044] (1) Add fine aggregate and coarse aggregate to the reactor, stir for 10 seconds, then add cement, mineral powder and mineral additives, continue stirring for 30 seconds, and finally a...

Embodiment 2

[0064] A prestressed concrete pipe pile without residual slurry (diameter 500mm, pipe wall thickness 100mm), its raw material components and weight (Kg) are:

[0065]

[0066] Described mineral additive is with embodiment 1.

[0067] The parameters of each centrifugation step in the production method are set as:

[0068] Low-speed centrifugation: the speed is set at 62r / min, and the time is 4min±10s;

[0069] Low and medium speed centrifugation: the speed is set to 122r / min, and the time is 1min±10s;

[0070] Medium-speed centrifugation: the speed is set at 223r / min, and the time is 3min±10s;

[0071] High-speed centrifugation: the speed is set at 390 / min, the time is 4min±10s, and there is no residual slurry during the centrifugation process.

[0072] All the other production methods are the same as in Example 1, and the finished product inspection: after steam curing, the demoulding strength is greater than 80MPa for 1 day.

[0073] Strength detection:

[0074] Durin...

Embodiment 3

[0077] A kind of autoclaved prestressed concrete pipe pile without residual slurry (diameter 500mm, pipe wall thickness 125mm), its raw material components and weight (Kg) are:

[0078]

[0079] Described mineral additive is with embodiment 1.

[0080] The parameters of each centrifugation step in the production method are set as:

[0081] Low-speed centrifugation: the speed is set at 62r / min, and the time is 4min±10s;

[0082] Low and medium speed centrifugation: the speed is set to 122r / min, and the time is 1min±10s;

[0083] Medium-speed centrifugation: the speed is set at 223r / min, and the time is 3min±10s;

[0084] High-speed centrifugation: the speed is set at 400 / min, the time is 4min±10s, and there is no residual slurry during the centrifugation process.

[0085] All the other production methods are the same as in Example 1, and the finished product inspection: after steam curing, the demoulding strength is greater than 80MPa for 1 day.

[0086] Strength detecti...