Cement composite dispersant

A composite dispersant and composite dispersion technology, applied in the field of chemical industry, can solve the problems that the dispersion effect affects the internal mechanical properties, etc., and achieve the effect of improving the electrostatic repulsion effect, improving the dispersion effect, and reducing the surface energy

Inactive Publication Date: 2019-07-16
刘国荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a cement composite dispersant for the dispersing effect of commonly used cement composite dispersants and the problems affecting internal mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] Preparation of carbon-boron carrier: Mix boric acid, xanthan gum, and citric acid solution with a mass fraction of 20% according to the mass ratio of 3:0.2:13~18, and heat-treat at 80~100°C for 20~45min to obtain a gel. The gel is heated in a high-temperature furnace at 700-800°C for 20-35 minutes to obtain a precursor, and the precursor is taken in a vacuum furnace at 1200-1500°C, and heat-treated for 1-3 hours to obtain a micropowder. The mass ratio of the micropowder is 1:7~ 16 Add 12% dopamine solution, soak at room temperature for 1-3 hours, filter, collect the filter residue and dry it in an oven at 65-80°C to obtain the carbon-boron carrier.

[0028] Filler: Mix talcum powder, polyvinyl alcohol, and cetyltrimethylammonium bromide at a mass ratio of 5-8:1:1, and grind for 1-3 hours to obtain the filler.

[0029] Additive: Mix microcrystalline paraffin and stearic acid at a mass ratio of 3-6:1 to obtain the additive.

[0030] The preparation method of composite di...

Embodiment 1

[0036] Catalyst: Mix chloroplatinic acid and isopropanol at a mass ratio of 1:40, and refrigerate at 2°C to obtain the catalyst.

[0037] Mixed lotion: Take diethyl ether and ethanol solution with a volume fraction of 70% at a volume ratio of 3:5 to obtain a mixed lotion.

[0038] Initiator: sodium persulfate.

[0039] Auxiliary material: mix hydroxyapatite, polyvinylpyrrolidone and lecithin according to the mass ratio of 5:1:1 to obtain the auxiliary material.

[0040] Preparation of carbon-boron carrier: Mix boric acid, xanthan gum, and citric acid solution with a mass fraction of 20% according to the mass ratio of 3:0.2:13, heat-treat at 80°C for 20 minutes to obtain a gel, and take the gel in a high-temperature furnace Heat at 700°C for 20min to obtain the precursor, take the precursor in a vacuum furnace at 1200°C, and heat-treat for 1h to obtain micropowder, take the micropowder and add 12% dopamine solution at a mass ratio of 1:7, soak at room temperature for 1h, filte...

Embodiment 2

[0049] Catalyst: Mix chloroplatinic acid and isopropanol at a mass ratio of 1:50, and refrigerate at 3°C ​​to obtain the catalyst.

[0050] Mixed lotion: Take diethyl ether and ethanol solution with a volume fraction of 70% at a volume ratio of 4:5 to obtain a mixed lotion.

[0051] Initiator: potassium persulfate.

[0052] Auxiliary material: mix hydroxyapatite, polyvinylpyrrolidone and lecithin according to the mass ratio of 6:1:1 to obtain the auxiliary material.

[0053] Preparation of carbon-boron carrier: Mix boric acid, xanthan gum, and citric acid solution with a mass fraction of 20% according to the mass ratio of 3:0.2:15, heat-treat at 90°C for 35 minutes to obtain a gel, and take the gel in a high-temperature furnace Heat at 750°C for 30min to obtain the precursor. Take the precursor in a vacuum furnace at 1400°C and heat-treat for 2h to obtain micropowder. Take the micropowder and add dopamine solution with a mass fraction of 12% at a mass ratio of 1:11, soak at r...

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Abstract

The invention discloses a cement composite dispersant, and belongs to the technical field of chemical industry. The problems that a current commonly used cement dispersant has a poor dispersion effectand influences on the internal mechanical properties are solved. A low critical micelle concentration can be maintained, the lipophilic groups of the dispersant can be adsorbed on the surface of thecement, and the hydrophilic groups can be combined with water, so that the dispersion effect of the cement is improved better. Hydrogen bonds are formed by silicon hydoxyl groups generated through hydrolysis and hydroxyl group contained in a composite dispersing material B, so that the stability of dispersion is enhanced, and the internal bonding force is improved; high-polarity reactive carboxylgroups in acrylic acid are introduced into humic acid molecules of the dispersant, and the influence of steric hindrance is brought through cooperation with acrylic acid grafting, so that the viscosity-reducing effect of the prepared silicon-containing material is improved, the dispersibility inside the obtained blended material is improved, and generation of sedimentation and uneven dispersion isreduced; and furthermore, the cement cohesion strength is improved, and the internal mechanical properties is further improved after blending of the cement is performed.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a cement composite dispersant. Background technique [0002] Cement is mostly used in civil construction sites, and water is added to cement to make cement slurry, which is mixed with fine aggregate sand to obtain mortar, and then coarse aggregate crushed stone is mixed with it to obtain concrete. They are mostly used in building components and civil engineering, It is also used in large quantities in many applications such as fire-resistant walls. In these grouts, mortars, and concretes, the strength is generated through coagulation and curing by the reaction of cement with water, so the workability after adding water decreases over time. In particular, since the socialization of the problem of early deterioration of concrete components in 1981, there has been a strong demand to reduce the unit water consumption of concrete to improve its construction performance and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C08F230/08C08F220/56C08F289/00C04B103/40
CPCC04B40/0046C04B2103/408C08F230/08C08F289/00C04B14/042C04B24/2623C04B24/121C04B24/42C04B24/2641C04B2103/0068C04B24/10C04B24/06C04B14/366C04B24/2652C08F220/56
Inventor 刘国荣
Owner 刘国荣
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