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Preparation method for cement based composite material taking steel slag as admixture

A composite material and cement-based technology, which is applied in the field of building materials, can solve the problems of low early strength, large fluctuations in composition, and application limitations, and achieve the effects of high strength, low preparation cost, and good wear resistance

Inactive Publication Date: 2017-07-25
佛山慧创正元新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydration process of free calcium oxide and magnesium oxide in steel slag will cause the expansion of the volume of the steel slag cement composite cementitious material, resulting in poor stability of the system; moreover, its composition fluctuates greatly and its early strength is low, which leads to its in cement-based materials. Apps are restricted in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of a cement-based composite material using steel slag as an admixture, comprising the following steps:

[0031] (1) In parts by weight, mix and stir 10 parts of calcium acetate, 3 parts of diethylenetriamine and water until the solid dissolves to obtain solution A; mix and stir 5 parts of triethylene glycol and 2 parts of triethanolamine hydrochloride evenly Finally, add 0.1 part of glacial acetic acid, mix and stir to obtain solution B; mix and stir solution A and solution B to obtain a mixed solution, and add it to a ball mill together with steel slag, ball mill for 1-2 hours, and dry after ball milling to obtain a pre- Process steel slag fine powder; wherein, during ball milling, the mass ratio of steel slag to mixed liquid is 100:0.05

[0032] (2) Add montmorillonite, octadecyltrimethylammonium bromide and cyclohexane into a three-necked flask, mix and stir evenly, heat up to 50°C, stir at a constant temperature for 20min, then add carboxylated ...

Embodiment 2

[0036] A preparation method of a cement-based composite material using steel slag as an admixture, comprising the following steps:

[0037] (1) In parts by weight, mix and stir 20 parts of calcium formate, 10 parts of diethylenetriamine and water until the solid dissolves to obtain solution A; mix 20 parts of 1,4-butanediol, 10 parts of triisopropanolamine After the hydrochloride is mixed and stirred evenly, add 2 parts of glacial acetic acid, mix and stir to obtain solution B; mix and stir solution A and solution B to obtain a mixed solution, and add it to the ball mill together with steel slag, ball mill for 2 hours, and dry after ball milling , to obtain pretreated steel slag powder; wherein, during ball milling, the mass ratio of steel slag to mixed solution is 100:0.13

[0038] (2) Add montmorillonite, octadecyltrimethylammonium bromide and cyclohexane into a three-necked flask, mix and stir evenly, heat up to 80°C, stir at a constant temperature for 40min, then add carbo...

Embodiment 3

[0042] A preparation method of a cement-based composite material using steel slag as an admixture, comprising the following steps:

[0043](1) In parts by weight, mix and stir 15 parts of sodium acetate, 5 parts of N-methyldiethanolamine and water until the solid dissolves to obtain solution A; mix 10 parts of neopentyl glycol and 3 parts of triethanolamine hydrochloride After stirring evenly, add 0.5 parts of glacial acetic acid, mix and stir to obtain solution B; mix and stir solution A and solution B to obtain a mixed solution, and add it to a ball mill together with steel slag, ball mill for 1.2 hours, and dry after ball milling to obtain Pretreatment of steel slag fine powder; wherein, during ball milling, the mass ratio of steel slag to mixed solution is 100:0.07

[0044] (2) Add montmorillonite, octadecyltrimethylammonium bromide and cyclohexane into a three-necked flask, mix and stir evenly, heat up to 60°C, stir at a constant temperature for 25min, then add carboxylat...

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Abstract

The invention discloses a preparation method for a cement based composite material taking steel slag as an admixture. The method comprises the following steps: firstly, preparing a mixed preparation, mixing the mixed preparation with the steel slag and ball-milling, thereby acquiring pretreated steel slag micro-powder; mixing imvite with octadecy trimethyl ammonium bromide and cyclohexane and then adding carboxylated carbon nano-tube, thereby acquiring a carbon nano-tube intercalated imvite material; mixing cement, pretreated steel slag micro-powder, carbon nano-tube intercalated imvite material, coal ash, wollastonite powder, gypsum and natural river sand, uniformly stirring, adding a mixture of water reducer, de-foaming agent, expanding agent, dispersing agent and deionized water, uniformly mixing and then acquiring cement based mixed slurry; and adding the cement based mixed slurry into a mold, compacting and forming, de-molding and maintaining, thereby acquiring the cement based composite material. According to the invention, the steel slag is taken as the raw material, the cost is low, the gelling activity of the pretreated steel slag is high, the composite material strength is high and the mechanical property is excellent.

Description

[0001] Technical field: [0002] The invention relates to the field of building materials, in particular to a method for preparing cement-based composite materials using steel slag as an admixture. [0003] Background technique: [0004] Steel slag is a solid waste produced in the iron and steel smelting process. Its mineral composition is mainly silicate phase and has potential gelling properties. Its discharge is about 15-20% of crude steel output. The density of steel slag is between 3.3-3.6g / cm 3 From the surface point of view, the steel slag particles are loosely connected and hard in texture. Due to the high content of Fe, it is difficult to grind steel slag. The grindability index of steel slag is 7, which is lower than that of blast furnace slag, which is 96, and that of standard sand is 1.0. [0005] In developed countries, the overall utilization rate of steel slag is very low, almost close to 100%, but the utilization rate of cement and concrete products in develop...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B20/02
CPCC04B20/023C04B28/02C04B2201/50C04B18/142C04B14/104C04B14/026C04B18/08C04B14/043C04B22/143C04B14/06C04B2103/302C04B2103/50C04B2103/408
Inventor 邵光伟
Owner 佛山慧创正元新材料科技有限公司
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