Mineral polymeric material based active powder concrete and preparation method thereof

A technology of powder concrete and mineral aggregation, which is applied to clay preparation devices, chemical instruments and methods, manufacturing tools, etc., can solve the problems of high price, hindering the application of active powder concrete, and high cost of active powder concrete, so as to save resources and energy, promote sustainable development, and protect the ecological environment

Active Publication Date: 2011-04-06
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main raw materials of ordinary active powder concrete are cement, silica fume, quartz powder, quartz sand, steel fiber, high-efficiency water reducer, etc. Due to the high price of raw materials such as silica fume, quartz powder, and quartz sand, the cost of active powder concrete Higher, which hinders the promotion and application of reactive powder concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh each raw material according to the following ratio

[0025] Cement: 0.2

[0026] Finely ground slag powder: 0.8

[0027] Quartz sand: 1.1

[0028] Liquid sodium water glass (modulus 1.5): 0.1

[0029] Water reducer: 0.02

[0030] Water: 0.15

[0031] Steel fiber (high-strength circular cross-section fiber): 0.1

[0032] First, pour the weighed cement, finely ground slag powder, steel fiber, and aggregate into the concrete mixer and stir for 4 minutes to make it evenly stirred, then pour the water dissolved in the activator and water reducer into the mixer, and then Stir for 6 minutes. Put the well-mixed active powder concrete into the test mold, vibrate for 2 minutes to discharge the air bubbles; the molded specimens are left at room temperature for one day, and then the molds are removed, and the molded specimens are placed in the concrete steam curing box. Raise the temperature to 80°C at a rate of 10°C / h, and then cool down to room temperature at a rate ...

Embodiment 2

[0035] Weigh each raw material according to the following ratio

[0036] Metakaolin: 1

[0037] River sand: 1.2

[0038] Liquid potassium silicate (modulus 1.0): 0.2

[0039] Water reducer: 0.01

[0040] Water: 0.3

[0041] Steel fiber (wave type): 0.15

[0042] First, pour the weighed metakaolin, steel fiber, and river sand into the concrete mixer and stir for 5 minutes to make it evenly stirred, then pour the water dissolved in the activator and water reducer into the mixer, and stir for another 4 minutes. The stirred active powder concrete is put into the test mold and extruded. The formed test pieces were placed in an autoclave after standing still at room temperature for one day, and autoclaved at 140°C for 24 hours. After the autoclave was completed, they were placed in a standard culture room for curing for 7 days.

[0043] The properties of the obtained active powder concrete specimen are: compressive strength: 183MPa; flexural strength: 23.9MPa.

Embodiment 3

[0045] Weigh each raw material according to the following ratio

[0046] Cement: 0.3

[0047] Silica fume: 0.2

[0048] Steel slag powder: 0.4

[0049] Quartz powder: 0.1

[0050] Tailing sand: 0.4

[0051] River sand: 0.7

[0052] Quartz sand: 0.2

[0053] Solid sodium water glass (modulus 3.0): 0.04

[0054] Solid sodium hydroxide: 0.02

[0055] Water reducer: 0.04

[0056] Water: 0.12

[0057]Steel fiber (end hook type steel fiber): 0.25

[0058] First, pour the weighed cement, silica fume, steel slag powder, quartz powder, tailings, river sand, and steel fiber into the concrete mixer and stir for 5 minutes to make it evenly stirred. Pour the water into the blender and blend for another 4 minutes. Put the stirred active powder concrete into the test mold, vibrate for 2 minutes to discharge the air bubbles; the formed test piece is put into the concrete steam curing box after standing still at room temperature for 6 hours, and the temperature is raised to 12°C / h. ...

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Abstract

The invention relates to a mineral polymeric material based active powder concrete and a preparation method thereof. The mineral polymeric material based active powder concrete is made of a gelled material, aggregate, an exciting agent, water, a water reducer and steel fiber in a mass ratio of 1: 0.8-1.3: 0.01-0.2: 0.1-0.3: 0.005-0.07: 0.01-0.25. The preparation method comprises the steps of: pouring the weighed gelled material, aggregate and steel fiber in an agitator and agitating evenly, adding the water in which the exciting agent and the water reducer are dissolved, mixing evenly and molding through vibration or compression, and carrying out autoclave curing or steamed curing on a molded test piece to obtain the mineral polymeric material based active powder concrete. By adopting thepreparation thought of introducing the mineral polymeric material, abundant solid wastes are mixed in the active powder concrete successfully; and the prepared active powder concrete not only has high strength and good durability, but also achieves the effects of reducing the cost and protecting the environment.

Description

Technical field: [0001] The invention belongs to the field of building materials, and in particular relates to a low-cost active powder concrete containing a large amount of industrial waste and a preparation method thereof. Background technique: [0002] Active powder concrete is a new type of ultra-high-strength cement-based material first researched and developed by the research team headed by Pierre Richard of the French BOUYGUES Science Department in the early 1990s. This material is due to the activity and fineness of the powder components. The increase is named active powder concrete. It adopts the preparation principle similar to DSP material, but the constituent materials are further rationalized, so it is different from ordinary steel fiber concrete (FRC) and high performance concrete (HPC), and at the same time, it is a further development of DSP material. RPC is made of densely filled fine particle mixture, superplasticizer and steel fiber mixed into a fluid slu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B28/08B28C5/40B28B11/24
CPCC04B28/02C04B18/08Y02W30/91C04B14/06C04B14/068C04B14/106C04B18/12C04B18/141C04B18/142C04B18/144C04B18/145C04B18/146C04B40/0028C04B40/0067C04B40/024
Inventor 易忠来李化建谭盐宾谢永江朱长华冯仲伟仲新华
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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