A kind of active powder concrete mixed with super active slag powder and its preparation method

A technology of reactive powder and slag powder, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. Reactivity, high reactivity effect

Active Publication Date: 2015-10-28
北京中联新航建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the high cost of reactive powder concrete in the prior art, and the problem that the compressive strength of reactive powder concrete is low in actual engineering applications, and then provide a kind of active powder concrete that can reduce the activity by adding super-active slag powder Cracking and cost of powder concrete, active powder concrete and its preparation method that can also improve its compressive strength under normal pressure heat curing conditions

Method used

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  • A kind of active powder concrete mixed with super active slag powder and its preparation method
  • A kind of active powder concrete mixed with super active slag powder and its preparation method
  • A kind of active powder concrete mixed with super active slag powder and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0058] The active powder concrete A in this implementation includes 1Kg cement, 0.32Kg super-active slag powder, 0.2Kg silica fume, 0.35Kg quartz powder, 1.25Kg natural river sand, 0.38Kg industrial water, 0.035Kg water reducing agent and preparation molding 1.5% of the volume of the final reactive powder concrete steel fiber; wherein the super-reactive slag powder is prepared by the following steps:

[0059] (1) Mix 64kg of slag powder with 12kg of the first grinding medium, wherein the first grinding medium is 4kg of Steel balls, and 1kg 2kg A mixture of steel columns; grinding in a ball mill for 55 minutes;

[0060] (2) Add 8kg of the second grinding medium to the step (1), wherein the second grinding medium has a diameter of The steel ball is continuously ground for 400 minutes to prepare the super-active slag powder of the present invention.

[0061] The preparation method of the reactive powder concrete in this embodiment is as follows:

[0062] (1) Dissolving the above-men...

Embodiment 2

[0066] The reactive powder concrete B described in this implementation includes 1kg cement, 0.2kg super-active slag powder, 0.21kg silica fume, 0.36kg quartz powder, 1.27kg natural river sand, 0.41kg industrial water, 0.037kg polycarboxylate for water reduction And steel fiber of 1.7% of the volume of the prepared reactive powder concrete;

[0067] Wherein, the super active slag powder is prepared through the following steps:

[0068] (1) Mix 4kg of S75 grade slag powder with 56kg of the first grinding medium, wherein the first grinding medium is 28kg Steel ball, 4kg Steel ball, 2kg Steel ball, 1.6kg Steel column, 2.4kg The mixture of the steel column is ground in a ball mill for 45 minutes;

[0069] (2) Add 24kg of the second grinding medium to the step (1), wherein the second grinding medium has a diameter of After grinding the steel balls for 480 minutes, the super-active slag powder of the present invention is prepared.

[0070] The preparation method of the reactive powder ...

Embodiment 3

[0078] The reactive powder concrete C in this implementation includes 1kg cement, 0.25kg super-active slag powder, 0.22Kg silica fume, 0.370Kg quartz powder, 1.28Kg natural river sand, 0.38Kg industrial water, 0.038Kg water reducing agent and preparation molding 1.8% steel fiber of the volume of the reactive powder concrete afterwards;

[0079] Wherein, the super active slag powder is prepared through the following steps:

[0080] (1) Mix 5kg of S95 grade slag powder with 16kg of the first grinding medium, wherein the first grinding medium is 6kg Steel ball, 2kg Steel ball, 2kg Steel ball, 2.6kg Steel column, 3.4kg The mixture of the steel column is ground in a ball mill for 60 minutes;

[0081] (2) Add 4kg of the second grinding medium to the step (1), wherein the second grinding medium has a diameter of The steel ball is continuously ground for 300 minutes to prepare the super-active slag powder of the present invention.

[0082] The preparation method of the reactive powder c...

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Abstract

The invention provides superactive slag powder doped active powder concrete which comprises cement, silica fume, quartz powder, sand, water, a water reducer and steel fiber and superactive slag powder. The superactive slag powder is prepared by the method comprising the following steps of: (1) mixing slag powder with a first grinding medium, and grinding for 45-90minutes in a ball mill; (2) adding a second grinding medium into the step (1), and continuously grinding for 180-480minoutes to prepare the superactive slag powder. The first grinding medium is a mixture consisting of steel balls with diameters of 60mm, 40mm and 20mm as well as steel columns with diameters of 20mm and 10nm. The second grinding medium is steel balls with diameter of 20mm. The compressive strength of the superactive slag powder doped active powder concrete prepared by the method in normal pressure thermal curing condition reaches 260-300MPa and the breaking strength is 35-45MPa. The compressive strength and the breaking strength are far greater than those of 200MPa level active powder concrete in engineering application in the prior art.

Description

Technical field [0001] The invention relates to an active powder concrete mixed with super active slag powder and a preparation method thereof, and belongs to the field of building materials. Background technique [0002] Reactive Powder Concrete (RPC) is a new type of cement-based composite material with ultra-high strength, ultra-high performance and low porosity. It is made from cement, quartz powder, silica fume, sand, steel fiber and superplasticizer after mixing and molding according to the principle of maximum compactness, removing coarse aggregate, and then steam curing or autoclave curing. RPC models can be divided into 200MPa, 500MPa and 800MPa grades according to their compressive strength. At present, the 200MPa grade RPC material has been applied in some projects, while the 500MPa grade and 800MPa grade are both in the testing stage of the laboratory. [0003] The basic component of RPC is active powder, where the active powder mainly refers to cement, silica fume an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B18/14C04B14/48C04B16/06
CPCY02W30/94Y02W30/91
Inventor 孙占兴聂法智贾伟进
Owner 北京中联新航建材有限公司
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