Regeneration additive for waste putty dust and preparation method thereof
1. The additive for regenerating waste putty dust is characterized by comprising the following components:
40-50 parts of heavy calcium powder;
0.1-0.3 part of cellulose ether;
5-10 parts of redispersible latex powder;
10-18 parts of thixotropic agent.
2. The additive for regenerating waste putty dust as set forth in claim 1, wherein the heavy calcium powder is one or two selected from the group consisting of 200 mesh heavy calcium powder, 400 mesh heavy calcium powder, 800 mesh heavy calcium powder.
3. A waste putty dust recycling additive as claimed in claim 1 characterised in that the cellulose ether is selected from the group consisting of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether and has a viscosity of 100000mpa.s to 200000 mpa.s.
4. The recycling additive for waste putty dust as defined in claim 1, wherein the re-dispersible latex powder is one or two of ethylene/vinyl acetate copolymer rubber powder, vinyl acetate/ethylene versatate copolymer rubber powder and acrylic acid copolymer rubber powder.
5. A regenerative additive for waste putty dust as defined in claim 1 wherein the thixotropic agent is starch ether or fumed silica.
6. A method of preparing a regeneration additive for waste putty dust as defined in claim 1 comprising the steps of:
(1) adding coarse whiting powder into a gravity-free mixer;
(2) weighing cellulose ether, redispersible latex powder and thixotropic agent, adding into a gravity-free mixer, and mixing at high speed to obtain uniform powder without agglomeration.
7. A method of using the regeneration additive for waste putty dust as defined in claim 1 comprising the steps of:
(1) adding a regeneration additive into the waste putty dust, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is (1): 200-300 parts by weight;
(2) and stirring and mixing the mixed waste putty dust and clear water according to the weight ratio of 1: 200-300.
Background
The putty (filling mud) is a decorative material for leveling the surface of a wall body, is thick paste paint and is an essential product before painting. Is applied on the primer or directly applied on the object to remove the defects of high and low unevenness on the surface of the object to be coated. When the engineering is decorated, the wall surface is smooth and convenient for subsequent latex paint construction. And the waste putty dust caused by wall surface polishing can not be reused because the putty dust absorbs impurities in the air after being mixed with water, constructed and dried, and the performances of the putty such as strength, toughness, water retention property and the like are reduced. Therefore, putty dust caused by wall surface polishing can be generally collected and treated as construction waste, the treatment mode is not environment-friendly and uneconomical, and the putty dust is plain and causes environmental pollution while the engineering cost is increased.
In the prior art, for example, CN107325616 discloses a method for regenerating waste putty dust, which is relatively simple to operate and can complete regeneration treatment in a construction site because the method aims at the treatment of waste putty dust, and has the disadvantages of complex operation, acid-base treatment, freezing roasting, soaking and drying, incapability of completing regeneration treatment in the construction site, and relatively high transportation cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides a technical scheme of a regeneration additive of waste putty dust, which comprises the following specific contents:
a regeneration additive of waste putty dust comprises the following components:
40-50 parts of heavy calcium powder;
0.1-0.3 part of cellulose ether;
5-10 parts of redispersible latex powder;
10-18 parts of thixotropic agent.
The preparation method of the regeneration additive for waste putty dust comprises the following steps:
(1) adding coarse whiting powder into a gravity-free mixer;
(2) weighing cellulose ether, redispersible latex powder and thixotropic agent in proper proportion, and mixing at high speed by a gravity-free mixer
(3) The powder material is discharged to be uniform and non-caking powder material.
The use method of the regeneration additive for waste putty dust comprises the following steps:
(1) adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Preferably, the heavy calcium powder contained in the regeneration additive is selected from one of 200-mesh heavy calcium powder, 400-mesh heavy calcium powder or 800-mesh heavy calcium powder.
Preferably, the regeneration additive comprises a cellulose ether selected from the group consisting of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether and having a viscosity of from 100000mPa.S to 200000mPa.S
Preferably, the re-dispersible latex powder contained in the regenerative additive is one of ethylene/vinyl acetate copolymer rubber powder, vinyl acetate/versatic acid ethylene copolymer rubber powder and acrylic acid copolymer rubber powder.
Preferably, the thixotropic agent contained in the rejuvenating additive is starch ether or fumed silica.
The heavy calcium powder contained in the regeneration additive can be mixed with waste putty dust to increase the toughness and strength of the product.
After the cellulose ether that regeneration additive contained of this application dissolves in aqueous, because surface activity effect guarantees putty granule evenly distributed effectively in the system, cellulose ether is as a protective colloid in addition, wraps up the putty granule to form one deck lubricating film on its surface, make the putty system after the mixture more stable, also improved the mobility of regeneration putty in the stirring process and the smooth nature of construction. The cellulose ether solution enables the water in the putty paste not to be lost easily due to the characteristics of the molecular structure of the cellulose ether solution, and the water is released gradually in a long period of time, so that the regenerated putty is endowed with good water retention and workability.
The regeneration additive contains redispersible latex powder, can be quickly redispersed into emulsion after being dissolved in water, forms a film after dispersion and plays a reinforcing role as a second adhesive, and in addition, the polymer of the film is distributed in the whole putty system as a reinforcing material, so that the cohesive force of the regeneration putty slurry is increased.
The regeneration additive contains the thixotropic agent, can increase the thickening thixotropy of a system, the thixotropic agent has a larger specific surface area, the thixotropic agent can be wrapped on the surface of powder substances due to the characteristic, and has an interval effect on powder particles, so that adhesion is prevented, free flowing of the powder is promoted, stronger adsorbability is realized, and the specific structure of the thixotropic agent can promote the thixotropic agent to absorb grease and moisture on the surface of the powder, so that adhesion among the powder is reduced. After the thixotropic agent is added into the putty paste, the viscosity is low when the putty paste is used for putty scraping, the putty paste is easy to brush, and becomes high after the putty paste is used for scraping, and the smooth brushing effect can be quickly kept.
Compared with the prior art, the invention has the following beneficial effects:
1. the application of the regeneration additive comprises heavy calcium powder, cellulose ether, redispersible latex powder and a thixotropic agent, can effectively improve toughness and strength of the regenerated putty dust slurry, endows the regenerated putty dust slurry with good water retention and workability, increases cohesion and thickening thixotropy of the regenerated putty dust slurry, and facilitates subsequent batch scraping operation.
2. By using the regeneration additive, waste putty dust polished at a construction site is changed into valuable, regeneration is carried out, and the regenerated putty meets the JGT 298-.
3. The invention can directly carry out regeneration on the construction site, effectively reduce the transportation cost and the worker cost, recover the regeneration on the site and accelerate the construction period efficiency.
Detailed Description
The present invention will be described in further detail below with reference to specific examples and test examples for verifying the effects, but the present invention is not limited to the following examples.
Example 1
The regeneration additive of the invention is prepared from the following components:
45 parts of 400-mesh heavy calcium powder;
0.2 part of hydroxyethyl methyl cellulose ether;
7 parts of ethylene/vinyl acetate copolymer rubber powder;
14 parts of starch ether.
The preparation method comprises the following steps:
(1) adding coarse whiting powder into a gravity-free mixer;
(2) weighing cellulose ether, redispersible latex powder and thixotropic agent, and adding into a gravity-free mixer for high-speed mixing;
(3) obtain uniform powder without agglomeration.
The use method of the regeneration additive for waste putty dust comprises the following steps:
(1) adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
example 2
The regeneration additive of the invention is prepared from the following components:
50 parts of 200-mesh heavy calcium powder;
0.3 part of hydroxypropyl methyl cellulose ether;
10 parts of vinyl acetate/tertiary carbonic acid ethylene copolymer rubber powder;
and 18 parts of starch ether.
The preparation method comprises the following steps:
(1) adding coarse whiting powder into a gravity-free mixer;
(2) weighing cellulose ether, redispersible latex powder and thixotropic agent, and adding into a gravity-free mixer for high-speed mixing;
(3) obtain uniform powder without agglomeration.
The use method of the regeneration additive for waste putty dust comprises the following steps:
(1) adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 300.
Detecting the regenerated putty:
example 3
The regeneration additive of the invention is prepared from the following components:
40 parts of 800-mesh heavy calcium powder;
0.1 part of hydroxypropyl methyl cellulose ether;
5 parts of acrylic copolymer rubber powder;
10 parts of fumed silica.
The preparation method comprises the following steps:
(1) adding coarse whiting powder into a gravity-free mixer;
(2) weighing cellulose ether, redispersible latex powder and thixotropic agent, and adding into a gravity-free mixer for high-speed mixing;
(3) obtain uniform powder without agglomeration.
The use method of the regeneration additive for waste putty dust comprises the following steps:
(1) adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
comparative example 1
The following components were used as regeneration additives: 800 mesh heavy calcium powder
(1) Adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
comparative example 2
The following components were used as regeneration additives: hydroxyethyl methyl cellulose ether
(1) Adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
comparative example 3
The following components were used as regeneration additives: acrylic copolymer rubber powder
(1) Adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
comparative example 4
The following components were used as regeneration additives: fumed silica
(1) Adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
comparative example 5
The following components were used as regeneration additives: 800-mesh heavy calcium powder and hydroxypropyl methyl cellulose ether
(1) Adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
comparative example 6
The following components were used as regeneration additives: hydroxypropyl methylcellulose ether and fumed silica
(1) Adding a regeneration additive into the waste putty dust in a construction site, and uniformly mixing to prepare mixed waste putty dust, wherein the weight ratio of the regeneration additive to the waste putty dust is 1: 200-300;
(2) and stirring and mixing the mixed waste putty dust and clean water according to the mass ratio of 1: 200.
Detecting the regenerated putty:
the detection results of the examples and the comparative examples show that: the regeneration additive can effectively regenerate waste putty dust, and the putty obtained by the regeneration operation of the regeneration additive provided by the invention is compounded in each component according to a specific proportion and meets the standard of JGT 298-.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
