CN105601158A - Mortar additive - Google Patents
Mortar additive Download PDFInfo
- Publication number
- CN105601158A CN105601158A CN201510981885.2A CN201510981885A CN105601158A CN 105601158 A CN105601158 A CN 105601158A CN 201510981885 A CN201510981885 A CN 201510981885A CN 105601158 A CN105601158 A CN 105601158A
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- CN
- China
- Prior art keywords
- water
- mortar
- mortar additive
- additive according
- defoamer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/2688—Copolymers containing at least three different monomers
- C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F287/00—Macromolecular compounds obtained by polymerising monomers on to block polymers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/44—Thickening, gelling or viscosity increasing agents
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a mortar additive. The mortar additive is prepared by mixing an A material with a B material, wherein the A material comprises the following components in percentage by mass: 4-10% of a retarder, 0.2-0.6% of an air entraining agent, 0.02-0.1% of a defoamer and the balance of water; and the B material comprises the following components in percentage by mass: 1.5-2.5% of a water reducer, 0.4-1.5% of a water retainer, 1.5-3% of redispersible emulsion powder, 0.5-2% of a thickener, 0.1-1% of a stabilizer and the balance of water. According to the mortar additive, the thickener is an acrylic polymer embedded polyether modified viscosity modifier and is good in solubility and compounding effect, low in cost and simple to prepare; and by using the mortar additive, the homogeneity, flowability, water-retaining property, hardening strength and bonding strength of mortar are all improved, and a two-in-one function of masonry and plastering can be realized.
Description
Technical field
The invention provides a kind of mortar additive, especially one can significantly improve mortar thickening water-retaining property,Reduce the mortar additive of mortar additive volume.
Background technology
Premixing mortar is the vital measure of another energy-saving and emission-reduction after ready-mixed concrete, promotes the use of novel buildingBuild mortar, be economize on resources, the effective measures of protection of the environment, raising construction quality. Building function mortar is doneFor novel green construction material is used widely, will become one of following requisite construction material.
Building mortar is the wet-mixing mixture that a kind of blunge forms. To carry out centralized production and guarantor to mortarCard quality, mortar additive is even more important. Mortar additive can carry out the open hour mortar (can workThe property the done time) guarantee, mortar is carried out well living easy property, setting time determine, ensure that mortar hasExcellent workability, improves intensity, cohesive force and the durability of mortar, and can effectively suppress the sky of mortarDrum cracking.
Summary of the invention
In view of this, the present invention be intended to propose one can significantly improve mortar thickening water-retaining property, reduce mortarThe mortar additive of admixture dosage.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of mortar additive, mixed by A material and B material, wherein:
The component of A material and the mass percent of each component are:
Set retarder 4%-10%, air entraining agent 0.2%-0.6%, defoamer 0.02%-0.1%, surplus is water;
The component of B material and the mass percent of each component are:
Water reducer 1.5%-2.5%, water-loss reducer 0.4%-1.5%, redispersible latex powder 1.5%-3%, thickeningAgent 0.5%-2%, stabilizing agent 0.1%-1%, surplus is water.
Preferably, described thickener is the polyether-modified type viscosity modification that a kind of acrylic polymer embedsAgent.
Further, at the bottom of the modified polyether that acrylic polymer is embedded is dissolved in still in advance, add initatorAfter, drip acrylamide and TGA and hydroxy-ethyl acrylate and stirred with given pace, dripAfter complete, add quantitative deionized water dilution, then regulate PH to make described thickener. Described initator is dioxygenWater and persulfuric acid ammonium salt.
Described A material adopts two patterns of mixing to mix in wet mixing mortar with B material, and the addition of described A material is for wetMix the 1.5%-3.0% of Binder Materials gross mass in cement mortar ratio, the addition of described B material is that wet mixing mortar is joinedThe 0.5%-2.5% of Binder Materials gross mass in ratio.
Preferably, described set retarder be in gluconic acid sodium salt, white sugar, burnt solidifying sour sodium, Citric Acid Mono extremelyFew a kind of.
Preferably, described air entraining agent is at least one in polyether phosphate, lauryl sodium sulfate.
Preferably, described defoamer is the synthetic mortar defoamer of polyethers.
Preferably, described water reducer is high performance water reducing agent of polyocarboxy acid.
Preferably, described water-loss reducer is at least one in hydroxypropyl methyl cellulose ether, CMC.
Preferably, described redispersible latex powder is at least one in starch ether, dicalcium powder.
Preferably, described stabilizing agent is at least one in xanthans, welan gum, guar gum.
Its thickener of described mortar additive provided by the invention is the poly-of a kind of acrylic polymer embeddingEther modified version viscosity modifier, its dissolubility and composite effective, and cost is low, preparation is produced simple. MakeIntensity, adhesion strength after homogeneity, mobility, water-retaining property and sclerosis with this mortar additive to mortarBe improved, can realize the two-in-one function of building by laying bricks or stones, plaster; Adopt A material, B material pair to mix pattern and can realizeRegulate and control at any time the requirement of mortar properties.
Brief description of the drawings
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, of the present invention showingMeaning property embodiment and explanation thereof are used for explaining the present invention, do not form inappropriate limitation of the present invention. At accompanying drawingIn:
Fig. 1 is the spirogram of using of the each material of mortar mix ratio;
Fig. 2 is the measurement result figure of embodiment 1 to embodiment 3.
Detailed description of the invention
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the present inventionCan mutually combine. Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Embodiment 1
Take 957.8g water, after adding successively set retarder 40g, defoamer 0.2g to be uniformly mixed, addEnter air entraining agent 2g uniform stirring and after 2 minutes, make A material 1kg;
Take 937.5g water, add successively 40% admittedly containing water reducer 37.5g, rubber powder 15g, water-loss reducer 4g,Thickener 5g, stabilizing agent 1g, after mix to stir and within 5 minutes, make B material 1kg.
After A material is mixed with B material, can make mortar additive.
Wherein, set retarder is Citric Acid Mono, and air entraining agent is polyether phosphate, and defoamer is for closing for polyethersBecome mortar defoamer, water reducer agent is 40% admittedly containing high performance water reducing agent of polyocarboxy acid, and water-loss reducer is hydroxypropyl firstBase cellulose ether, redispersible rubber powder is starch ether,, thickener is homemade acrylic compounds viscosity modifier,Stabilizing agent is xanthans.
Embodiment 2
Take 883g water, after adding successively set retarder 100g, defoamer 1g to be uniformly mixed, add and drawGas agent 6g, uniform stirring makes A material 1kg after 2 minutes;
Take 872.5g water, add successively water reducer 62.5g, rubber powder 30g, water-loss reducer 15g, thickener20g, stabilizing agent 10g, after mix to stir and within 5 minutes, make B material 1kg.
After A material is mixed with B material, can make mortar additive.
Wherein, set retarder is gluconic acid sodium salt and burnt solidifying sour sodium, in mass ratio, and gluconic acid sodium salt: burnt solidifying acidSodium=5:5, air entraining agent is lauryl sodium sulfate, defoamer is for being the synthetic mortar defoamer of polyethers, diminishingAgent agent is 40% admittedly containing high performance water reducing agent of polyocarboxy acid, and water-loss reducer is hydroxypropyl methyl cellulose ether and methylolThe mixture of cellulose ether, in mass ratio, hydroxypropyl methyl cellulose ether: CMC ether=2.2:1.2,Redispersible rubber powder is dicalcium powder, and thickener is homemade acrylic compounds viscosity modifier, and stabilizing agent is melonThat glue.
Embodiment 3
Take 935.4g water, after adding successively set retarder 60g, defoamer 0.6g to be uniformly mixed, addEnter air entraining agent 4g uniform stirring and after 2 minutes, make A material 1kg;
Take 902g water, add successively water reducer 50g, rubber powder 22g, water-loss reducer 9g, thickener 12g,Stabilizing agent 5g, after mix to stir and within 5 minutes, make B material.
After A material is mixed with B material, can make mortar additive.
Wherein, set retarder is white sugar, and air entraining agent is polyether phosphate, and defoamer is for being the synthetic mortar of polyethersDefoamer, water reducer agent is 40% admittedly containing high performance water reducing agent of polyocarboxy acid, water-loss reducer is hydroxypropyl methyl fiberElement ether,, redispersible rubber powder is the mixture of starch ether and dicalcium powder, in mass ratio, starch ether: coarse whitingPowder=2.3:7.7, thickener is acrylic compounds viscosity modifier, stabilizing agent is xanthans.
In embodiment 1 to embodiment 3, at the bottom of the modified polyether that acrylic polymer is embedded is dissolved in still in advance,Add after initator, drip acrylamide and TGA and hydroxy-ethyl acrylate and stirred with given paceMix, after dropping completely, add quantitative deionized water dilution, then regulate PH to make described thickener; UseDescribed initator is hydrogen peroxide and persulfuric acid ammonium salt.
When test, strength classes of mortar M15 designs mortar mix ratio, and the each material usage of mortar mix ratio is shown in figure1。
Wet mixing mortar additive prepared by embodiment 1-embodiment 3 is applied in above-mentioned mortar, wet mixing mortarIn additive, A material adopts volume 2.0%, and B material adopts volume 2.2%, according to JGJ/T223-2010 standardIn method carry out performance measurement, measurement result is shown in.
From examining and determine above achievement data, acrylic compounds viscosity modifier provided by the invention and makingWet mixing mortar additive can make the every detection index of fresh mortar obviously be better than present market product, is more better than skyWhite experimental group. Particularly can, compared with under low-dosage, can make the mortar open hour break through 34h, water retention 99%,Keep during this period service behaviour, easily realize engineering time operation requirements.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, not all at thisWithin bright spirit and principle, any amendment of doing, be equal to replacement, improvement etc., all should be included in thisWithin bright protection domain.
Claims (7)
1. a mortar additive, is characterized in that, mixed by A material and B material, wherein:
The component of A material and the mass percent of each component are:
Set retarder 4%-10%, air entraining agent 0.2%-0.6%, defoamer 0.02%-0.1%, surplus is water;
The component of B material and the mass percent of each component are:
Water reducer 1.5%-2.5%, water-loss reducer 0.4%-1.5%, redispersible latex powder 1.5%-3%, thickeningAgent 0.5%-2%, stabilizing agent 0.1%-1%, surplus is water.
2. a kind of mortar additive according to claim 1, is characterized in that, described thickener is onePlant the polyether-modified type viscosity modifier that acrylic polymer embeds.
3. a kind of mortar additive according to claim 1, is characterized in that, by acrylic ester polymersCompound embed modified polyether be dissolved in still in advance at the bottom of, add after initator, with given pace drip acrylamide withTGA and hydroxy-ethyl acrylate are also stirred, and add quantitative deionized water dilution after dropping completely, thenRegulate PH to make described thickener.
4. a kind of mortar additive according to claim 3, is characterized in that, described initator is twoOxygen water and persulfuric acid ammonium salt.
5. a kind of mortar additive according to claim 1, is characterized in that, described A material and BMaterial adopts two patterns of mixing to mix in wet mixing mortar, and the addition of described A material is gelling in wet mixing mortar proportioningThe 1.5%-3.0% of material gross mass, the addition of described B material is the total matter of Binder Materials in wet mixing mortar proportioningThe 0.5%-2.5% of amount.
6. a kind of mortar additive according to claim 1, is characterized in that, described set retarder is PortugalAt least one in grape sodium saccharate, white sugar, burnt solidifying sour sodium, Citric Acid Mono; Described air entraining agent is polyethers phosphorusAt least one in acid esters, lauryl sodium sulfate; Described defoamer is the synthetic mortar defoamer of polyethers.
7. a kind of mortar additive according to claim 1, is characterized in that, described water reducer is for poly-Carboxylic acid high-performance water reducing agent; Described water-loss reducer be in hydroxypropyl methyl cellulose ether, CMC extremelyFew a kind of; Described redispersible latex powder is at least one in starch ether, dicalcium powder; Described stabilizing agentFor at least one in xanthans, welan gum, guar gum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981885.2A CN105601158A (en) | 2015-12-24 | 2015-12-24 | Mortar additive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981885.2A CN105601158A (en) | 2015-12-24 | 2015-12-24 | Mortar additive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105601158A true CN105601158A (en) | 2016-05-25 |
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ID=55981590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510981885.2A Pending CN105601158A (en) | 2015-12-24 | 2015-12-24 | Mortar additive |
Country Status (1)
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673486A (en) * | 2016-07-11 | 2017-05-17 | 惠州市金砂浆科技有限公司 | Wet-mixed mortar admixture |
| CN106746891A (en) * | 2016-12-23 | 2017-05-31 | 广东龙湖科技股份有限公司 | A kind of wet mixing mortar additive and preparation method thereof |
| CN107021666A (en) * | 2017-03-02 | 2017-08-08 | 萧县沃德化工科技有限公司 | A kind of early-strength anti-freezing type compound additive and preparation method and application |
| CN107651875A (en) * | 2017-10-13 | 2018-02-02 | 湖南先锋建材有限公司 | A kind of efficiently workability dry powder mortar additive and preparation method and application |
| CN107973541A (en) * | 2016-10-21 | 2018-05-01 | 常州大正恒固建材有限公司 | Height bonds the low pumping type wet mixing mortar that drops and surely moulds agent and preparation method thereof with liquid |
| CN108863150A (en) * | 2018-09-21 | 2018-11-23 | 天津天盈新型建材有限公司 | A kind of compound additive for mechanically spraying plastering mortar |
| CN109293276A (en) * | 2018-10-25 | 2019-02-01 | 湖南中岩建材科技有限公司 | A kind of thickening water-retaining type additive and its preparation method and application |
| CN109293274A (en) * | 2018-09-29 | 2019-02-01 | 莱芜市易和环保科技有限公司 | A kind of wet mixing mortar special additive and preparation method thereof |
| CN109399998A (en) * | 2018-10-19 | 2019-03-01 | 邢台市政建设集团股份有限公司 | A kind of liquid mortar additive |
| CN109574544A (en) * | 2019-01-23 | 2019-04-05 | 张家界万众新型建筑材料有限公司 | A kind of complex additive in common dry-mixed mortar |
| CN110372253A (en) * | 2019-08-03 | 2019-10-25 | 广州骏天科技有限公司 | A kind of wet mixing mortar additive containing inulin and application |
| CN110407508A (en) * | 2018-05-29 | 2019-11-05 | 临沂大学 | A kind of wet mixing mortar additive |
| CN110510912A (en) * | 2019-09-30 | 2019-11-29 | 湖南格林朗科技有限公司 | A kind of wet mixing mortar additive and preparation method thereof |
| CN110655346A (en) * | 2019-09-29 | 2020-01-07 | 湖南中岩建材科技有限公司 | Machine-made sand regulator and preparation method thereof |
| CN111056763A (en) * | 2019-12-30 | 2020-04-24 | 广西北海市圣峰建材科技有限公司 | Preparation method of high-molecular anti-crack and anti-permeability mortar modifier |
| CN111908827A (en) * | 2020-08-21 | 2020-11-10 | 重庆富皇建筑工业化制品有限公司 | All-machine-made sand wet-mixed mortar additive and processing method thereof |
| CN115286283A (en) * | 2022-08-17 | 2022-11-04 | 湖北裕顺建材科技有限公司 | Dry powder mortar additive containing industrial protein powder and dry powder mortar |
| CN116040980A (en) * | 2023-04-03 | 2023-05-02 | 石家庄市长安育才建材有限公司 | Wet-mixed mortar additive, preparation method thereof and wet-mixed mortar |
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| CN103664052A (en) * | 2013-11-29 | 2014-03-26 | 上海三瑞高分子材料有限公司 | Polycarboxylate superplasticizer for machine-made sand concrete |
| CN104129943A (en) * | 2014-08-18 | 2014-11-05 | 四川恒泽建材有限公司 | Wet-mixed mortar admixture as well as preparation method and application thereof |
| CN104177561A (en) * | 2014-07-30 | 2014-12-03 | 广东红墙新材料股份有限公司 | Polycarboxylate water reducing agent with slow-release property and mud resistance as well as preparation method and application of polycarboxylate water reducing agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101234864A (en) * | 2008-02-28 | 2008-08-06 | 赵鲁波 | Building plastering mortar additive |
| CN101691288A (en) * | 2009-09-30 | 2010-04-07 | 谢日清 | Lightweight leveling mortar |
| CN103664052A (en) * | 2013-11-29 | 2014-03-26 | 上海三瑞高分子材料有限公司 | Polycarboxylate superplasticizer for machine-made sand concrete |
| CN104177561A (en) * | 2014-07-30 | 2014-12-03 | 广东红墙新材料股份有限公司 | Polycarboxylate water reducing agent with slow-release property and mud resistance as well as preparation method and application of polycarboxylate water reducing agent |
| CN104129943A (en) * | 2014-08-18 | 2014-11-05 | 四川恒泽建材有限公司 | Wet-mixed mortar admixture as well as preparation method and application thereof |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673486A (en) * | 2016-07-11 | 2017-05-17 | 惠州市金砂浆科技有限公司 | Wet-mixed mortar admixture |
| CN107973541A (en) * | 2016-10-21 | 2018-05-01 | 常州大正恒固建材有限公司 | Height bonds the low pumping type wet mixing mortar that drops and surely moulds agent and preparation method thereof with liquid |
| CN106746891A (en) * | 2016-12-23 | 2017-05-31 | 广东龙湖科技股份有限公司 | A kind of wet mixing mortar additive and preparation method thereof |
| CN107021666A (en) * | 2017-03-02 | 2017-08-08 | 萧县沃德化工科技有限公司 | A kind of early-strength anti-freezing type compound additive and preparation method and application |
| CN107651875A (en) * | 2017-10-13 | 2018-02-02 | 湖南先锋建材有限公司 | A kind of efficiently workability dry powder mortar additive and preparation method and application |
| CN110407508A (en) * | 2018-05-29 | 2019-11-05 | 临沂大学 | A kind of wet mixing mortar additive |
| CN108863150B (en) * | 2018-09-21 | 2021-01-08 | 天津天盈新型建材有限公司 | Composite additive for mechanical spraying plastering mortar |
| CN108863150A (en) * | 2018-09-21 | 2018-11-23 | 天津天盈新型建材有限公司 | A kind of compound additive for mechanically spraying plastering mortar |
| CN109293274A (en) * | 2018-09-29 | 2019-02-01 | 莱芜市易和环保科技有限公司 | A kind of wet mixing mortar special additive and preparation method thereof |
| CN109399998A (en) * | 2018-10-19 | 2019-03-01 | 邢台市政建设集团股份有限公司 | A kind of liquid mortar additive |
| CN109293276A (en) * | 2018-10-25 | 2019-02-01 | 湖南中岩建材科技有限公司 | A kind of thickening water-retaining type additive and its preparation method and application |
| CN109574544A (en) * | 2019-01-23 | 2019-04-05 | 张家界万众新型建筑材料有限公司 | A kind of complex additive in common dry-mixed mortar |
| CN110372253A (en) * | 2019-08-03 | 2019-10-25 | 广州骏天科技有限公司 | A kind of wet mixing mortar additive containing inulin and application |
| CN110372253B (en) * | 2019-08-03 | 2020-10-30 | 广州骏天科技有限公司 | Inulin-containing wet-mixed mortar additive and application thereof |
| CN110655346A (en) * | 2019-09-29 | 2020-01-07 | 湖南中岩建材科技有限公司 | Machine-made sand regulator and preparation method thereof |
| CN110510912A (en) * | 2019-09-30 | 2019-11-29 | 湖南格林朗科技有限公司 | A kind of wet mixing mortar additive and preparation method thereof |
| CN110510912B (en) * | 2019-09-30 | 2021-12-14 | 湖南格林朗科技有限公司 | Wet-mixed mortar additive and preparation method thereof |
| CN111056763A (en) * | 2019-12-30 | 2020-04-24 | 广西北海市圣峰建材科技有限公司 | Preparation method of high-molecular anti-crack and anti-permeability mortar modifier |
| CN111908827A (en) * | 2020-08-21 | 2020-11-10 | 重庆富皇建筑工业化制品有限公司 | All-machine-made sand wet-mixed mortar additive and processing method thereof |
| CN115286283A (en) * | 2022-08-17 | 2022-11-04 | 湖北裕顺建材科技有限公司 | Dry powder mortar additive containing industrial protein powder and dry powder mortar |
| CN116040980A (en) * | 2023-04-03 | 2023-05-02 | 石家庄市长安育才建材有限公司 | Wet-mixed mortar additive, preparation method thereof and wet-mixed mortar |
| CN116040980B (en) * | 2023-04-03 | 2023-08-08 | 石家庄市长安育才建材有限公司 | Wet-mixed mortar additive, preparation method thereof and wet-mixed mortar |
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Application publication date: 20160525 |