Technology for producing cement pipe bar product by using jevigating metallurgy slag and coal ash as doping material

A process technology, fly ash technology, applied in the production field of cement pipe and rod products, to achieve good economic and social benefits, improve early strength and later strength, and reduce energy consumption

Inactive Publication Date: 2007-09-26
嘉兴学院管桩应用技术研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ground steel slag, ground slag, etc. are collectively referred to as ground metallurgical slag, and ground steel slag, ground slag, etc. are used as admixtures for pipe pile concrete alone or as admixtures in cement production. Coal ash is also used in the production of pretensioned high-strength concrete pipe piles and drainage pipes, but the ground metallurgical slag or the ground metallurgical slag is mixed with fly ash and replaced by cement in a certain proportion to produce prestressed concrete poles and steel bars Concrete poles, prestressed concrete water pipes, steel cylinder prestressed concrete pipes, and reinforced concrete drainage pipes are five commonly used cement pipes and rods that have not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1. When the reinforced concrete drainage pipe RCP IIφ1200×4000 is produced, the specific surface area is 450m 2 The same amount of ground slag micropowder per kg replaces PO type 32.5 grade "Conch brand" ordinary Portland cement, and the mixing ratio of fly ash in the admixture is 0%. For freshly mixed concrete, the water-binder ratio is controlled to be 0.45, and the slump is 3cm to 5cm. The amount (kg) of various materials per cubic meter of concrete is: cement: slag powder: sand: gravel: water = 300: 100: 600 :1220:180. The mixing time of concrete mixing is 1.5 minutes, and then the concrete distribution operation of centrifugal products is carried out; the centrifugation time of products is 18 minutes, and the maximum centrifugal acceleration is 34g (note: g refers to the acceleration of gravity); in concrete distribution, After centrifugation, send the drain pipe with the mold into the steam curing pool, stop for 1.5 hours, and then carry out steam curi...

Embodiment 2

[0010] Embodiment 2. When the annular prestressed concrete conical electric pole φ150×10×C×BY is produced, the specific surface area is 420m 2 / kg finely ground slag micropowder and Class I fly ash are blended at a ratio of 1:1 to replace 25% of PII type 42.5 grade "Sea Lion" ordinary Portland cement in equal amounts to make fresh concrete. The water-binder ratio is 0.4, the slump is 3cm-5cm, and the amount (kg) of various materials per cubic meter of concrete is: cement: slag powder: fly ash: sand: gravel: water = 345: 57.5: 57.5: 625:1210:184. The mixing time for concrete mixing is 1.5 minutes, which is 0.5 minutes longer than when no admixture is added; then the concrete distribution operation, mold clamping operation, and prestressed tensioning operation of the electric pole are carried out; the maximum centrifugal acceleration of the electric pole during centrifugal operation It is 35g (note: g refers to the acceleration of gravity), and the centrifugation time is 15 min...

Embodiment 3

[0011] Embodiment 3. When the pipe core of prestressed concrete water pipe (pipe core winding process) SYG III A800 is produced, it is 480m with specific surface area 2 / kg of finely ground slag powder and Class I fly ash are blended at a ratio of 2:1, and the blending material replaces 35% PO type 42.5 grade "Conch Brand" ordinary Portland cement in the same amount, and at the same time, 1.0% The MD-150 high-efficiency water reducer is formulated into fresh concrete, the water-binder ratio is controlled to be 0.33-0.35, the slump is 3cm-5cm, and the amount (kg) of various materials per cubic meter of concrete is: cement: finely ground Slag fine powder: fly ash: sand: gravel: water: superplasticizer = 312:112:56:615:1250:164:4.8. The mixing time for concrete mixing is 1.5 minutes. Then carry out the concrete distribution operation of centrifugal products. The maximum centrifugal acceleration when the product is centrifuged is 34g (note: g refers to the acceleration of gravity...

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Abstract

The invention discloses a making method of cement pipe rod based on grinded metallurgical slag and coal powder as doped material, which is characterized by the following: blending grinded metallurgical slag and coal powder according to certain proportion to replace 5%-60% cement over 32.5 grade; reducing doped quantity of cement; improving early-stage and late-stage strength of cement pipe rod.

Description

technical field [0001] The invention relates to a production technical method of cement pipe rod products. Background technique [0002] In the prior art, the commonly used cement pipe pole products include prestressed concrete poles, reinforced concrete poles, prestressed concrete water pipes, prestressed steel cylinder concrete pipes, and reinforced concrete drainage pipes. The cementitious materials used in the production of these 5 kinds of cement pipe and rod products are Portland cement above grade 32.5 or ordinary Portland cement or slag Portland cement or composite Portland cement. Pipe pile is a high-strength concrete product, and it is the product with the highest technical content among cement products in my country. [0003] Ground steel slag, ground slag, etc. are collectively referred to as ground metallurgical slag, and ground steel slag, ground slag, etc. are used as admixtures for pipe pile concrete alone or as admixtures in cement production. Coal ash is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B32/02C04B28/00B28B1/08B28B1/20C04B18/14C04B18/08C04B14/04C04B14/06
CPCC04B28/04Y02W30/91C04B14/02C04B14/06C04B18/08C04B18/142C04B20/0076C04B32/02C04B40/0032C04B40/02C04B40/024C04B2103/302C04B24/14
Inventor 蒋元海刘红飞
Owner 嘉兴学院管桩应用技术研究所
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