CN110606693A - Thickening powder for dry-mixed mortar and preparation method thereof - Google Patents

Thickening powder for dry-mixed mortar and preparation method thereof Download PDF

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Publication number
CN110606693A
CN110606693A CN201911033215.2A CN201911033215A CN110606693A CN 110606693 A CN110606693 A CN 110606693A CN 201911033215 A CN201911033215 A CN 201911033215A CN 110606693 A CN110606693 A CN 110606693A
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powder
mortar
thickening
mixture
thickening powder
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CN201911033215.2A
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Chinese (zh)
Inventor
张立
周宇武
王彬彬
唐圳
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Ningbo New Guangyi Building Materials Co Ltd
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Ningbo New Guangyi Building Materials Co Ltd
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Priority to CN201911033215.2A priority Critical patent/CN110606693A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039Premixtures of ingredients
    • C04B40/0042Powdery mixtures
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/44Thickening, gelling or viscosity increasing agents

Abstract

The invention relates to thickening powder for dry powder mortar and a preparation method thereof, relating to the technical field of dry powder mortar, and specifically comprising the following components: 20-30 kg/t of cellulose, 30-45 kg/t of re-dispersible latex powder, 380-430 kg/t of bentonite, 80-100 kg/t of sodium lignosulfonate and 60-80 kg/t of calcium lignosulfonate; the thickening powder also comprises 50-70 kg/t of hydroxymethyl starch, 5-10 kg/t of polyvinyl alcohol and 10-15 kg/t of polyacrylamide. The thickening powder prepared by the invention is added into dry powder mortar, so that the consistency of the mortar can be ensured, and the adhesive force between the mortar and a wall body can be improved.

Description

Thickening powder for dry-mixed mortar and preparation method thereof
Technical Field
The invention relates to the technical field of dry powder mortar, in particular to thickening powder for dry powder mortar and a preparation method thereof.
Background
The dry powder mortar is a granular or powder mixture prepared by uniformly mixing cement, sand, mineral admixture and functional additive in a certain proportion in a dry state in a professional production plant, then transporting the mixture to a construction site in a dry powder package or bulk form, and adding water according to the specification to mix the mixture to obtain the dry powder mortar material which can be directly used. The thickening powder is a novel non-lime non-air-entraining water-retaining thickening filler, is easy to measure, has no radioactivity and corrosiveness, and can be properly adjusted in proportion to different raw materials to achieve the best effect. The thickening powder for the dry powder mortar has the characteristics of water resistance, seepage resistance, small shrinkage and high bonding force, the performance indexes of the dry powder mortar added with the thickening powder are superior to those of the traditional mortar, and the thickening powder can solve the problems of poor operability of the dry powder mortar, low strength of mixed mortar, large shrinkage and water intolerance of the dry powder mortar in material properties.
The Chinese patent with the publication number of CN103043940B discloses thickening powder for preparing dry-mixed plastering mortar, which is composed of organic materials, wherein the ingredients of the thickening powder comprise 11-13% of hydroxypropyl methyl cellulose ether, 22-24% of wood fiber, 57-61% of calcium lignosulfonate and 6-7% of starch ether, and the thickening powder is used as an additive of the dry-mixed plastering mortar, so that the workability, water retention property and mechanical property of the dry-mixed plastering mortar can be obviously improved.
The above prior art solutions have the following drawbacks: the hydroxypropyl methyl cellulose ether has a thickening effect and can improve the consistency of the dry-mixed plastering mortar, but the thickening powder has little influence on the caking property of the dry-mixed plastering mortar, so that the caking property between the mortar and a wall body is poor.
Disclosure of Invention
The invention aims to provide thickening powder for dry powder mortar, which is added into the dry powder mortar and can improve the binding force between the mortar and a wall body; the invention also aims to provide a preparation method of the thickening powder for the dry-mixed mortar.
The technical purpose of the invention is realized by the following technical scheme: the thickening powder for the dry powder mortar specifically comprises the following components: 20-30 kg/t of cellulose, 30-45 kg/t of re-dispersible latex powder, 380-430 kg/t of bentonite, 80-100 kg/t of sodium lignosulfonate and 60-80 kg/t of calcium lignosulfonate.
By adopting the technical scheme, the cellulose is a hydrophobic macromolecule formed by connecting glucose through glycosidic bonds, and the hydrophobic main chain of the cellulose is associated with the surrounding water molecules through hydrogen bonds, so that the volume of the cellulose is improved, the free movement space of other particle components in the mortar is reduced, and the viscosity of the system is improved; in addition, the cellulose molecules realize the increase of viscosity through the winding of molecular chains.
The redispersible latex powder can be redispersed into emulsion quickly after contacting with water, the emulsion can be dehydrated again in the process of setting and hardening the mortar, a polymer film structure can be formed on the surface of the mortar particles, the defects on the interface of fine aggregate and setting material can be filled, the stress concentration is reduced, the redispersable latex powder cannot be damaged under the action of external force, and the redispersable latex powder has better cohesiveness to inorganic and organic materials. The addition of the redispersible latex powder increases the bonding strength of the mortar, and the increase of the bonding force can reduce the thickness of the bonding layer. When the dry-mixed plastering mortar is stirred by adding water, the redispersible latex powder is dispersed automatically and does not cohere with cement, and lubricating effect exists among particles of the redispersible latex powder, so that mortar components can flow independently. On the other hand, after the redispersible latex powder is added, the redispersible latex powder has a certain air entraining effect, and bubbles play a role of microbeads in the mixing process, so that the construction workability of the mortar can be improved.
The bentonite is a layered inorganic silicate, swells to form flocculent substances after absorbing water, has good suspension property and dispersibility, is combined with a proper amount of water to form colloid, can release charged particles in the water, increases the viscosity of the system and improves the bonding effect between mortar and a wall body.
The sodium lignosulfonate and the calcium lignosulfonate are anionic surfactants, have strong dispersing capacity, can uniformly disperse solids in an aqueous medium, contain various active groups, and can generate condensation or generate hydrogen bond with other compounds. The sodium lignosulfonate and the calcium lignosulfonate are added into the mortar, so that the surface tension and the interfacial tension of water can be reduced, and the water reducing effect is achieved.
The invention is further provided with: the thickening powder also comprises 50-70 kg/t of hydroxymethyl starch, and the preparation method of the hydroxymethyl starch comprises the following steps: 1) weighing 100g of starch, adding into a container, adding 30ml of absolute ethyl alcohol, and uniformly stirring; 2) then adding 20g of sodium hydroxide and 22g of sodium pyrophosphate, stirring uniformly, and standing for 2 h; 3) adding 12g of sodium chloroacetate, stirring uniformly, and sealing and standing the container for 30 h; 4) adding the mixture after standing in the container into a ball mill, adding a ball milling medium, carrying out ball milling for 90min at the temperature of 60 ℃ at the rotating speed of 400r/min, separating the mixture and the ball milling medium after the ball milling is finished, washing the mixture by using ethanol with the mass fraction of 50% until no chloride ions exist in the mixture, drying and crushing the mixture at the temperature of 50 ℃, and sieving the mixture by using a 150-mesh sieve for later use.
By adopting the technical scheme, the hydroxymethyl starch is cold water soluble anionic starch ether and is thickened mainly by hydration and entanglement among molecules. On one hand, the hydroxymethyl starch added into the mortar can absorb a large amount of water in the mortar, so that the size of the hydroxymethyl starch is greatly expanded, and free movement spaces of other components in the mortar are reduced, thereby achieving the thickening effect; on the other hand, the molecular chains of the hydroxymethyl starch are intertwined with each other to form a three-dimensional network structure, and other components in the mortar are enclosed in the network structure and cannot flow freely, so that the purpose of thickening is achieved. The addition of the hydroxymethyl starch improves the bonding strength of the mortar, so that the bonding force between the mortar and a wall body is enhanced.
The preparation method adopts a mechanical activation method to prepare the hydroxymethyl starch by placing the starch, the etherifying agent sodium chloroacetate and the cross-linking agent sodium pyrophosphate in a ball mill, and has the advantages of simple preparation process and controllable process.
The invention is further provided with: the thickening powder also comprises 5-10 kg/t of polyvinyl alcohol.
By adopting the technical scheme, the polyvinyl alcohol is a water-soluble high-molecular polymer and has good cohesiveness and dispersibility, and the polyvinyl alcohol is used as the protective colloid of the redispersible latex powder, so that the dispersibility of the redispersible latex powder can be improved, and the cohesiveness of the redispersible latex powder can be better exerted.
The invention is further provided with: the thickening powder also comprises 10-15 kg/t of polyacrylamide.
By adopting the technical scheme, the polyacrylamide is a linear high molecular polymer, has good adhesion and thickening property, and can reduce the frictional resistance among molecules; the molecular structural unit contains a large amount of acylamino, so that hydrogen bonds are easily formed, the polyacrylamide has good water solubility and high chemical activity, and is easy to disperse and uniform in the using process when added into mortar.
The invention is further provided with: the thickening powder specifically comprises the following components: 25kg/t of cellulose, 37.5kg/t of redispersible latex powder, 400kg/t of bentonite, 90kg/t of sodium lignosulfonate, 72kg/t of calcium lignosulfonate, 63kg/t of hydroxymethyl starch, 10kg/t of polyvinyl alcohol and 12.5kg/t of polyacrylamide.
The invention is further provided with: the thickening powder specifically comprises the following components: 28kg/t of cellulose, 45kg/t of redispersible latex powder, 415kg/t of bentonite, 85kg/t of sodium lignosulfonate, 65kg/t of calcium lignosulfonate, 58kg/t of hydroxymethyl starch, 8kg/t of polyvinyl alcohol and 15kg/t of polyacrylamide.
The invention is further provided with: the cellulose is lignocellulose.
By adopting the technical scheme, the lignocellulose has a good effect of preventing the mortar layer from cracking due to the stable size, and the lignocellulose can also improve the workability of the mortar construction process, increase the strength, enhance the adhesive force of the mortar to the wall surface and the like.
The invention is further provided with: the bentonite is sodium bentonite.
By adopting the technical scheme, the bentonite is divided into sodium bentonite and calcium bentonite according to whether the interlayer cations are sodium ions or calcium ions, the bentonite has viscosity, but the sodium bentonite contains soda ash, so that the viscosity is increased. On the other hand, the sodium bentonite is added into the thickening powder and then added into the mortar, and the thickening powder is uniformly dispersed in the mortar due to the good expansion performance of the sodium bentonite, so that the uniformity of the performances of all parts of the mortar is ensured.
The second technical purpose of the invention is realized by the following technical scheme: the method specifically comprises the following steps:
step 1, drying the powder materials in the formula, weighing the materials according to the formula, and mixing and stirring the cellulose, the bentonite, the sodium lignosulfonate, the calcium lignosulfonate, the hydroxymethyl starch and the polyacrylamide uniformly;
and 2, uniformly mixing the redispersible latex powder and the polyvinyl alcohol, adding the mixture into the mixture obtained in the step 1, and uniformly stirring the mixture again to obtain the thickening powder.
By adopting the technical scheme, the polyvinyl alcohol is used as the protective colloid of the redispersible latex powder, and is uniformly mixed with other substances, so that the redispersible latex powder can be prevented from being coagulated, and the bonding property of the redispersible latex powder is ensured. In addition, the preparation method is simple to operate and is suitable for producing large-batch thickening powder.
In conclusion, the beneficial technical effects of the invention are as follows:
1. the redispersible latex powder can be redispersed into emulsion quickly after contacting with water, the emulsion can be dehydrated again in the process of setting and hardening the mortar, a polymer film structure can be formed on the surface of the mortar particles, the defects on the interface of fine aggregate and setting material can be filled, the stress concentration is reduced, the redispersable latex powder cannot be damaged under the action of external force, and the redispersable latex powder has better cohesiveness to inorganic and organic materials. The addition of the redispersible latex powder increases the bonding strength of the mortar, and the increase of the bonding force can reduce the thickness of the bonding layer. When the dry-mixed plastering mortar is stirred by adding water, the redispersible latex powder is dispersed automatically and does not cohere with cement, and lubricating effect exists among particles of the redispersible latex powder, so that mortar components can flow independently. On the other hand, after the redispersible latex powder is added, the redispersible latex powder has a certain air entraining effect, and bubbles play a role of microbeads in the mixing process, so that the construction workability of the mortar can be improved;
2. the bentonite is a layered inorganic silicate, expands to form flocculent substances after absorbing water, has good suspension property and dispersibility, is combined with a proper amount of water to form colloid, can release charged particles in the water, increases the viscosity of the system and improves the bonding effect between mortar and a wall body;
3. hydroxymethyl starch is a cold water soluble anionic starch ether that is thickened primarily by hydration and intermolecular entanglement. On one hand, the hydroxymethyl starch added into the mortar can absorb a large amount of water in the mortar, so that the size of the hydroxymethyl starch is greatly expanded, and free movement spaces of other components in the mortar are reduced, thereby achieving the thickening effect; on the other hand, the molecular chains of the hydroxymethyl starch are intertwined with each other to form a three-dimensional network structure, and other components in the mortar are enclosed in the network structure and cannot flow freely, so that the aim of thickening is fulfilled; the addition of the hydroxymethyl starch improves the bonding strength of the mortar, so that the bonding force between the mortar and a wall body is enhanced.
Detailed Description
The present invention will be described in further detail with reference to examples.
The mass of the components in all the examples is 1 ton of dry mortar.
Example 1
TABLE 1 Components and their masses of a thickening powder for dry-mixed mortars
Components Mass (kg) Components Mass (kg)
Lignocellulose 20 Lignosulfonic acid sodium salt 80
Redispersible latex powder 30 Lignosulfonic acid calcium salt 60
Sodium bentonite 400
The preparation method of the thickening powder specifically comprises the following steps:
step 1, drying the powder materials in the formula, weighing the materials according to the formula, and mixing and stirring cellulose, bentonite, sodium lignosulfonate and calcium lignosulfonate uniformly;
and 2, adding the redispersible latex powder into the mixture obtained in the step 1, and uniformly stirring again to obtain the thickening powder.
Example 2
TABLE 2 Components and their masses of a thickening powder for dry-mixed mortars
Components Mass (kg) Components Mass (kg)
Lignocellulose 25 Lignosulfonic acid sodium salt 100
Redispersible latex powder 40 Lignosulfonic acid calcium salt 70
Sodium bentonite 380 Hydroxymethyl starch 50
The preparation method of the hydroxymethyl starch comprises the following steps: 1) weighing 100g of starch, adding into a container, adding 30ml of absolute ethyl alcohol, and uniformly stirring; 2) then adding 20g of sodium hydroxide and 22g of sodium pyrophosphate, stirring uniformly, and standing for 2 h; 3) adding 12g of sodium chloroacetate, stirring uniformly, and sealing and standing the container for 30 h; 4) adding the mixture after standing in the container into a ball mill, adding a ball milling medium, carrying out ball milling for 90min at the temperature of 60 ℃ at the rotating speed of 400r/min, separating the mixture and the ball milling medium after the ball milling is finished, washing the mixture by using ethanol with the mass fraction of 50% until no chloride ions exist in the mixture, drying and crushing the mixture at the temperature of 50 ℃, and sieving the mixture by using a 150-mesh sieve for later use.
The preparation method of the thickening powder specifically comprises the following steps:
step 1, drying the powder materials in the formula, weighing the materials according to the formula, and mixing and stirring cellulose, bentonite, sodium lignosulfonate, calcium lignosulfonate and hydroxymethyl starch uniformly;
and 2, adding the redispersible latex powder into the mixture obtained in the step 1, and uniformly stirring again to obtain the thickening powder.
Example 3
TABLE 3 Components and their masses of a thickening powder for dry-mixed mortars
Components Mass (kg) Components Mass (kg)
Lignocellulose 30 Lignosulfonic acid calcium salt 80
Redispersible latex powder 45 Hydroxymethyl starch 60
Sodium bentonite 430 Polyvinyl alcohol 5
Lignosulfonic acid sodium salt 90
The preparation method of hydroxymethyl starch is the same as that of example 2.
The preparation method of the thickening powder specifically comprises the following steps:
step 1, drying the powder materials in the formula, weighing the materials according to the formula, and mixing and stirring cellulose, bentonite, sodium lignosulfonate, calcium lignosulfonate and hydroxymethyl starch uniformly;
and 2, uniformly mixing the redispersible latex powder and the polyvinyl alcohol, adding the mixture into the mixture obtained in the step 1, and uniformly stirring the mixture again to obtain the thickening powder.
Example 4
TABLE 4 Components and their masses of a thickening powder for dry-mixed mortars
The preparation method of hydroxymethyl starch is the same as that of example 2.
The preparation method of the thickening powder specifically comprises the following steps:
step 1, drying the powder materials in the formula, weighing the materials according to the formula, and mixing and stirring the cellulose, the bentonite, the sodium lignosulfonate, the calcium lignosulfonate, the hydroxymethyl starch and the polyacrylamide uniformly;
and 2, uniformly mixing the redispersible latex powder and the polyvinyl alcohol, adding the mixture into the mixture obtained in the step 1, and uniformly stirring the mixture again to obtain the thickening powder.
Example 5
TABLE 5 Components and their masses of a thickening powder for dry-mixed mortars
Components Mass (kg) Components Mass (kg)
Lignocellulose 25 Lignosulfonic acid calcium salt 72
Redispersible latex powder 37.5 Hydroxymethyl starch 63
Sodium bentonite 400 Polyvinyl alcohol 10
Lignosulfonic acid sodium salt 90 Polyacrylamide 12.5
The preparation method of hydroxymethyl starch is the same as that of example 2.
The preparation of this densified powder was the same as in example 4.
Example 6
TABLE 6 Components and their masses of a thickening powder for dry-mixed mortars
Components Mass (kg) Components Mass (kg)
Lignocellulose 28 Lignosulfonic acid calcium salt 65
Redispersible latex powder 45 Hydroxymethyl starch 58
Sodium bentonite 415 Polyvinyl alcohol 8
Lignosulfonic acid sodium salt 85 Polyacrylamide 15
The preparation method of hydroxymethyl starch is the same as that of example 2.
The preparation of this densified powder was the same as in example 4.
Comparative example 1
A thickening powder for dry mortar differs from example 5 in that the mass of redispersible latex powder is 25kg and the mass of hydroxymethyl starch is 48kg, and otherwise the same as example 5.
Comparative example 2
A thickening powder for dry mortar differs from example 5 in that the mass of redispersible latex powder is 50kg and the mass of hydroxymethyl starch is 75kg, and otherwise the same as example 5.
Preparing cement mortar: according to the cement: sand: water 1: 3: 0.5 preparing 1 ton of cement mortar, adding the thickening powder prepared in the examples and the comparative examples, adding the substances into a stirrer, uniformly stirring, and taking out to be tested.
Consistency: the consistency of newly stirred cement mortar is measured by a mortar consistency meter, and the operation method refers to JGJ70-90 'test method for basic performance of building mortar';
tensile bond strength test: the mortar and the base layer form a whole together, and the mortar can be effectively bonded with the base layer only if the mortar has bonding property. And (3) placing the molding frame on the molding surface of the prepared cement mortar test block, pouring the stirred cement mortar sample into the molding frame, uniformly inserting the cement mortar sample for 15 times by using a tamper, manually jolting the cement mortar sample for 5 times, then troweling the surface of the mortar in a 45-degree direction by using a scraper, lightly demolding, and curing for 25 days in an environment with the temperature of 20-25 ℃ and the relative humidity of 60-80%. Then taking out the test piece, and carrying out a tensile bonding strength test on the test piece by adopting a pressure testing machine;
water retention: the water retention rate is detected by adopting a German standard inorganic gel material mortar detection method DIN 18557-7;
construction performance: the cement mortar after stirring is used for wall plastering, and whether the plastering process is easy to paint uniformly or not is recorded.
Table 7 results of performance testing
According to the performance test results, the comparison between the example 1 and the examples 2 to 6 shows that the addition of the hydroxymethyl starch can not only improve the consistency of the mortar, but also improve the caking property of the mortar; example 2 compares with example 3, the redispersible latex powder has more excellent performance with the addition of polyvinyl alcohol. According to the description of workability, the thickening powder prepared in the comparative example has good cohesiveness, but the cohesiveness is too good, which tends to cause uneven mortar application and poor workability, as compared with the examples.
The present embodiment is only for explaining the present invention, and not for limiting the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of which are protected by patent law within the scope of the claims of the present invention.

Claims (9)

1. A thickening powder for dry mortar, which is characterized in that: the paint specifically comprises the following components: 20-30 kg/t of cellulose, 30-45 kg/t of re-dispersible latex powder, 380-430 kg/t of bentonite, 80-100 kg/t of sodium lignosulfonate and 60-80 kg/t of calcium lignosulfonate.
2. The thickening powder for dry mortar according to claim 1, characterized in that: the thickening powder also comprises 50-70 kg/t of hydroxymethyl starch, and the preparation method of the hydroxymethyl starch comprises the following steps: 1) weighing 100g of starch, adding into a container, adding 30ml of absolute ethyl alcohol, and uniformly stirring; 2) then adding 20g of sodium hydroxide and 22g of sodium pyrophosphate, stirring uniformly, and standing for 2 h; 3) adding 12g of sodium chloroacetate, stirring uniformly, and sealing and standing the container for 30 h; 4) adding the mixture after standing in the container into a ball mill, adding a ball milling medium, carrying out ball milling for 90min at the temperature of 60 ℃ at the rotating speed of 400r/min, separating the mixture and the ball milling medium after the ball milling is finished, washing the mixture by using ethanol with the mass fraction of 50% until no chloride ions exist in the mixture, drying and crushing the mixture at the temperature of 50 ℃, and sieving the mixture by using a 150-mesh sieve for later use.
3. A thickening powder for dry-mixed mortars, according to claim 2, characterized in that: the thickening powder also comprises 5-10 kg/t of polyvinyl alcohol.
4. The thickening powder for dry mortar according to claim 3, characterized in that: the thickening powder also comprises 10-15 kg/t of polyacrylamide.
5. The thickening powder for dry mortar according to claim 4, characterized in that: the thickening powder specifically comprises the following components: 25kg/t of cellulose, 37.5kg/t of redispersible latex powder, 400kg/t of bentonite, 90kg/t of sodium lignosulfonate, 72kg/t of calcium lignosulfonate, 63kg/t of hydroxymethyl starch, 10kg/t of polyvinyl alcohol and 12.5kg/t of polyacrylamide.
6. The thickening powder for dry mortar according to claim 4, characterized in that: the thickening powder specifically comprises the following components: 28kg/t of cellulose, 45kg/t of redispersible latex powder, 415kg/t of bentonite, 85kg/t of sodium lignosulfonate, 65kg/t of calcium lignosulfonate, 58kg/t of hydroxymethyl starch, 8kg/t of polyvinyl alcohol and 15kg/t of polyacrylamide.
7. The thickening powder for dry mortar according to claim 1, characterized in that: the cellulose is lignocellulose.
8. The thickening powder for dry mortar according to claim 1, characterized in that: the bentonite is sodium bentonite.
9. A preparation method of thickening powder for dry-mixed mortar is characterized by comprising the following steps: the method specifically comprises the following steps:
step 1, drying the powder materials in the formula, weighing the materials according to the formula, and mixing and stirring the cellulose, the bentonite, the sodium lignosulfonate, the calcium lignosulfonate, the hydroxymethyl starch and the polyacrylamide uniformly;
and 2, uniformly mixing the redispersible latex powder and the polyvinyl alcohol, adding the mixture into the mixture obtained in the step 1, and uniformly stirring the mixture again to obtain the thickening powder.
CN201911033215.2A 2019-10-28 2019-10-28 Thickening powder for dry-mixed mortar and preparation method thereof Pending CN110606693A (en)

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Publication number Priority date Publication date Assignee Title
WO2005105699A1 (en) * 2004-04-27 2005-11-10 Hercules Incorporated Cement-based plasters using water rentention agents prepared from raw cotton linters
CN1966447A (en) * 2006-07-25 2007-05-23 上海飞步建材有限公司 Thickening powder
CN103553418A (en) * 2013-09-27 2014-02-05 江苏兆佳建材科技有限公司 Ready-mixed mortar water-retention thixotropic agent and preparation method thereof
CN104743960A (en) * 2015-04-01 2015-07-01 浙江忠信新型建材有限公司 High-water-retention thickening powder for dry mix mortar
CN107344822A (en) * 2017-06-05 2017-11-14 南宁科恺混凝土外加剂有限公司 One kind is containing bentonitic premixing mortar water-keeping thickening material and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005105699A1 (en) * 2004-04-27 2005-11-10 Hercules Incorporated Cement-based plasters using water rentention agents prepared from raw cotton linters
CN1966447A (en) * 2006-07-25 2007-05-23 上海飞步建材有限公司 Thickening powder
CN103553418A (en) * 2013-09-27 2014-02-05 江苏兆佳建材科技有限公司 Ready-mixed mortar water-retention thixotropic agent and preparation method thereof
CN104743960A (en) * 2015-04-01 2015-07-01 浙江忠信新型建材有限公司 High-water-retention thickening powder for dry mix mortar
CN107344822A (en) * 2017-06-05 2017-11-14 南宁科恺混凝土外加剂有限公司 One kind is containing bentonitic premixing mortar water-keeping thickening material and preparation method thereof

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郭群等: "《砂浆实验及检验培训教材》", 30 September 2014, 中国建材工业出版社 *

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