CN110228962A - A kind of water-retaining type wet mixing mortar plasticizer and preparation method thereof - Google Patents
A kind of water-retaining type wet mixing mortar plasticizer and preparation method thereof Download PDFInfo
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- CN110228962A CN110228962A CN201910459034.XA CN201910459034A CN110228962A CN 110228962 A CN110228962 A CN 110228962A CN 201910459034 A CN201910459034 A CN 201910459034A CN 110228962 A CN110228962 A CN 110228962A
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- 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
- C04B24/28—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B24/32—Polyethers, e.g. alkylphenol polyglycolether
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- 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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to building additive technical fields, more particularly to a kind of water-retaining type wet mixing mortar plasticizer and preparation method thereof, after preparation method is the following steps are included: polyether monomer, cumenyl polyoxyethylene ether, 2- amino -3- p-hydroxyphenyl propionic ester and co-catalyst are mixed, initiator solution is added, the mixed solution A of acrylic acid and 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester composition is separately added into after reaction, and the solution B of initiator and chain-transferring agent composition, after reaction, pH=7~8 are adjusted to get the wet mixing mortar plasticizer is arrived.Using mortar synthesized by wet mixing mortar plasticizer provided by the invention, compared with prior art, there is the advantages that low consistency loss, preferable water retention, mortar compression strength and high long-time stability, there is significant progress.
Description
Technical field
The present invention relates to building additive technical fields, and in particular to a kind of water-retaining type wet mixing mortar plasticizer and its preparation
Method.
Background technique
Development with the novel urbanization of China accelerates, Municipal infrastructure, house quantity will substantially increase,
And building energy consumption has occupied sizable part in whole energy consumption.Building mortar is as being only second to materials for wall and concrete
Large construction material, annual dosage reach as many as several hundred million tons.Wet mixing mortar is stablized with quality, energy conservation and environmental protection, and cleaning can be concentrated to give birth to
It the advantages such as produces and will gradually substitute and traditional mortar is prepared in situ；The features such as wet mixing mortar is with its energy conservation and environmental protection, sustainability, is capable
The inevitable outcome of industry development.
From the point of view of current domestic situation, the popularization of this green building material of wet mixing mortar is imperative.And with developed country's phase
Than China starts late to the research of wet mixing mortar, popularizes also relatively slowly, therefore how to prepare and easily good, work to research
The wet mixing mortar that property retention ability is strong, durability is good just seems necessary, and wherein the mating additive product of wet mixing mortar is made
For role indispensable in wet mixing mortar production, wet mixing mortar can be assigned with outstanding water-retaining property and workability, therefore
Under the premise of wet mixing mortar use is carried forward vigorously in the whole nation, the development of wet mixing mortar additive product is significant.
Existing wet mixing mortar additive can use plasticizer, however existing plasticizer water retention, compression strength and
It is insufficient in terms of long-time stability.
Summary of the invention
To solve the problems in above-mentioned background technique, the present invention provides a kind of preparation side of water-retaining type wet mixing mortar plasticizer
Method, comprising the following steps:
Polyether monomer, cumenyl polyoxyethylene ether, 2- amino -3- p-hydroxyphenyl propionic ester and co-catalyst are mixed
Afterwards, initiator solution is added, acrylic acid and 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester composition are separately added into after reaction
Mixed solution A and initiator and chain-transferring agent composition solution B, after reaction, adjust pH=7~8 to get arrive institute
State wet mixing mortar plasticizer.
Wherein, it is divided into front and back according to concrete operations initiator to be added twice, such as 1/2 is added for the first time, when forming solution B,
Add 1/2 initiator；Preferably, the adjusting of pH can be carried out using common agents such as 30% sodium hydroxide solutions.
On the basis of above scheme, it is preferable that the 2- amino -3- p-hydroxyphenyl propionic ester the preparation method comprises the following steps: will
2- amino -3- p-hydroxyphenyl propionic acid monomer and unsaturated alcohol are mixed according to the weight ratio of 1:1~3, and catalyst is added, 80~
Esterification is carried out at 120 DEG C, removes extra unsaturated alcohol, obtains 2- amino -3- p-hydroxyphenyl propionic ester.
On the basis of above scheme, it is preferable that the unsaturated alcohol be propenyl, butenol, in prenol extremely
Few one kind.
On the basis of above scheme, it is preferable that the catalyst be Monoammonium ferric sulfate dodecahydrate, sodium bisulfate monobydrate,
At least one of eight water aluminum sulfate.
On the basis of above scheme, it is preferable that the preparation of the 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester
Method includes:
3- hydroxy phenyl phosphinylidyne propionic acid and hexamethylene are added in reaction kettle, dihydromyrcenol is then added, simultaneously
Be added to 732 cation exchange resins and hydroquinone, stir evenly, temperature then risen to 30~60 DEG C, preferably react 2~
4h obtains 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester after filtering, air-distillation.
On the basis of above scheme, it is preferable that the mass ratio of the 3- hydroxy phenyl phosphinylidyne propionic acid, dihydromyrcenol
For 1:1~3,732 cation exchange resin dosages are the 0.5%~2% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, and hydroquinone is used
Amount is the 0.5%~1% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, and air-distillation temperature is 70~75 DEG C.
On the basis of above scheme, it is preferable that the polyether monomer, cumenyl polyoxyethylene ether, acrylic acid, 2- ammonia
The mass ratio of base -3- p-hydroxyphenyl propionic ester and 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester be 80:10~20:5~
10:5~10:5~10.
On the basis of above scheme, it is preferable that the polyether monomer is allyl polyethenoxy ether, methacrylic is poly-
Ethylene oxide ether or isopentene group polyoxyethylene ether, preferred molecular weight 2400.
On the basis of above scheme, it is preferable that the co-catalyst is n,N-Dimethylaniline, N, N- diethylaniline
Or four at least one of aziridine.
On the basis of above scheme, it is preferable that the initiator is azo diisobutyl amidine hydrochloride (AIBA, V-50
Initiator), two isobutyl imidazoline hydrochloride of azo (abbreviation AIBI, VA-044 initiator), azo dicyano valeric acid is (referred to as
ACVA, V-501), at least one of azo dicyclohexyl formonitrile HCN (abbreviation AIP, VA-061 initiator).
On the basis of above scheme, it is preferable that the chain-transferring agent is pungent two mercaptan of 3,6- dioxy -1,8-.
On the basis of above scheme, it is preferable that the 0.5%~1% of the dosage polyether monomer quality of the co-catalyst,
The dosage of initiator is the 0.5%~2% of polyether monomer quality, the dosage of chain-transferring agent be polyether monomer quality 1%~
2%.
The present invention also provides guarantors prepared by the preparation method of a kind of as above any water-retaining type wet mixing mortar plasticizer
Water type wet mixing mortar plasticizer.
On the basis of above scheme, it is preferable that the molecular weight of the water-retaining type wet mixing mortar plasticizer be 60000~
100000。
Through the invention preparation method preparation water-retaining type wet mixing mortar plasticizer have following technical principle and
The utility model has the advantages that
1, the synthesis of the invention by the way that 2- amino -3- p-hydroxyphenyl propionic ester to be used for wet mixing mortar plasticizer, amino acid
Not only making the space steric effect of wet mixing mortar plasticizer molecule branch is enhanced, but also esterification products are in concrete
It can also gradually be hydrolyzed under alkaline environment and release the carboxylic acid group that part has dispersion effect, so that the wet mixing mortar plasticising of preparation
Agent has better model retention effect.
2, phosphinylidyne based structures are introduced in the branch terminals of wet mixing mortar plasticizer molecule, phosphinylidyne based structures make wet-mixing sand
Slurry plasticizer molecule branch not only has space steric effect, also has electrostatic repulsive force, so that the wet mixing mortar of preparation increases
The dispersibility for moulding agent is higher.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, without
It is whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
The present invention also provides embodiments as follows:
Embodiment one
(1) first esterification: reaction vessel is added in the butenol of the 2- amino -3- p-hydroxyphenyl propionic acid of 50g and 50g
In, 80 DEG C are warming up to, the eight water aluminum sulfate of 1g are then added, is reacted 3 hours, reflux removes extra butenol, obtains 2-
Amino -3- p-hydroxyphenyl propionic acid butene esters.
(2) second esterifications:
100g 3- hydroxy phenyl phosphinylidyne propionic acid and hexamethylene are added in reaction kettle, 100g dihydro laurel is then added
Enol, while 732 cation exchange resins and hydroquinone is added, it stirs evenly, temperature is then risen to 30 DEG C, react 2h,
Through filtering, after air-distillation to get arriving 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester；
Wherein, 732 cation exchange resin dosages are the 0.5% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, and hydroquinone is used
Amount is the 0.5% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, and air-distillation temperature is 70 DEG C.
(3) copolyreaction:
By the allyl polyethenoxy ether of 80g, the cumenyl polyoxyethylene ether of 10g, 10g 2- amino -3- to oxybenzene
The n,N-Dimethylaniline of base propionic ester and 1g are added in reaction kettle, are warming up to 30 DEG C, and the V-50 for being added at one time 0.5g draws
Send out agent, after 10min, be added dropwise respectively solution A (acrylic acid of 5g, the 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester of 5g and
The water of 10g) and solution B (water of the V-50 initiator of 0.5g and 3,6- dioxy -1,8- of 2g pungent two mercaptan and 22.5g), it is small 1
When it is interior drip off, continue anti-30min.The sodium hydroxide solution (30%) that 20g is added be neutralized to pH=7~8 to get described in
Wet mixing mortar plasticizer.
Embodiment 2
(1) first esterification: the 2- amino -3- p-hydroxyphenyl propionic acid of 50g is reacted into appearance with the addition of the propenyl of 100g
In device, 90 DEG C are warming up to, the Monoammonium ferric sulfate dodecahydrate of 1g is then added, is reacted 3 hours, reflux removes extra propenyl,
Obtain 2- amino -3- p-hydroxyphenyl propionic ester.
(2) second esterifications:
100g 3- hydroxy phenyl phosphinylidyne propionic acid and hexamethylene are added in reaction kettle, 200g dihydro laurel is then added
Enol, while 732 cation exchange resins and hydroquinone is added, it stirs evenly, temperature is then risen to 50 DEG C, react 3h,
Through filtering, after air-distillation to get arriving 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester；
Wherein, 732 cation exchange resin dosages are the 1% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, hydroquinone dosage
It is the 0.5% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, air-distillation temperature is 75 DEG C.
(3) copolyreaction:
By the allyl polyethenoxy ether of 80g, the cumenyl polyoxyethylene ether of 15g, 7g 2- amino -3- p-hydroxyphenyl
The n,N-Dimethylaniline of propionic ester and 0.5g are added in reaction kettle, are warming up to 40 DEG C, are added at one time the VA- of 0.25g
After 044,10min, respectively be added dropwise solution A (acrylic acid of 10g, the 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester of 10g and
The water of 20g) and solution B (water of 3,6- dioxy -1,8- of the VA-044 and 1.5g of 0.25g pungent two mercaptan and 15.75g), it is small 2
When it is interior drip off, continue anti-30min.The sodium hydroxide solution (30%) that 30g is added be neutralized to pH=7~8 to get described in
Wet mixing mortar plasticizer.
Embodiment 3
(1) first esterification: the 2- amino -3- p-hydroxyphenyl propionic acid of 50g is reacted with the addition of the prenol of 150g
In container, 90 DEG C are warming up to, the sodium bisulfate monobydrate of 1g is then added, is reacted 4 hours, reflux removes extra prenol
It goes, obtains 2- amino -3- p-hydroxyphenyl propionic acid isopentenyl ester.
(2) second esterifications:
100g 3- hydroxy phenyl phosphinylidyne propionic acid and hexamethylene are added in reaction kettle, 250g dihydro laurel is then added
Enol, while 732 cation exchange resins and hydroquinone is added, it stirs evenly, temperature is then risen to 60 DEG C, react 3h,
Through filtering, after air-distillation to get arriving 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester；
Wherein, 732 cation exchange resin dosages are the 1.5% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, and hydroquinone is used
Amount is the 1% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, and air-distillation temperature is 72 DEG C.
(3) copolyreaction:
By the allyl polyethenoxy ether of 80g, the cumenyl polyoxyethylene ether of 20g, 5g 2- amino -3- p-hydroxyphenyl
The n,N-Dimethylaniline of propionic ester and 1g are added in reaction kettle, are warming up to 40 DEG C, are added at one time the V-501 of 0.75g,
After 10min, respectively be added dropwise solution A (acrylic acid of 7g, the 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester of 7.5g and
The water of 14.5g) and solution B (water of 3,6- dioxy -1,8- of the V-501 and 1g of 0.75g pungent two mercaptan and 15.75g), it is small 1
When it is interior drip off, continue anti-30min.The sodium hydroxide solution (30%) that 27g is added be neutralized to pH=7~8 to get described in
Wet mixing mortar plasticizer.
Embodiment 4
(1) first esterification: the 2- amino -3- p-hydroxyphenyl propionic acid of 50g is reacted with the addition of the prenol of 150g
In container, 90 DEG C are warming up to, the sodium bisulfate monobydrate of 1g is then added, is reacted 4 hours, reflux removes extra prenol
It goes, obtains 2- amino -3- p-hydroxyphenyl propionic acid isopentenyl ester.
(2) second esterifications:
100g 3- hydroxy phenyl phosphinylidyne propionic acid and hexamethylene are added in reaction kettle, 300g dihydro laurel is then added
Enol, while 732 cation exchange resins and hydroquinone is added, it stirs evenly, temperature is then risen to 40 DEG C, react 4h,
Through filtering, after air-distillation to get arriving 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester；
Wherein, 732 cation exchange resin dosages are the 2% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, hydroquinone dosage
It is the 1% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, air-distillation temperature is 70 DEG C.
(3) copolyreaction:
By the allyl polyethenoxy ether of 80g, the cumenyl polyoxyethylene ether of 15g, 8g 2- amino -3- p-hydroxyphenyl
The n,N-Dimethylaniline of propionic ester and 0.5g are added in reaction kettle, are warming up to 30 DEG C, are added at one time the VA-061 of 1g,
After 10min, solution A (acrylic acid of 5g, the 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester of 6g and 11g is respectively added dropwise
Water) and solution B (water of 3,6- dioxy -1,8- of the VA-061 and 1.5g of 1g pungent two mercaptan and 22.5g), it is dripped off in 2 hours,
Continue anti-30min.The sodium hydroxide solution (30%) that 20g is added carries out being neutralized to pH=7~8 to get the wet mixing mortar is arrived
Plasticizer.
It should be noted that design parameter or some common agents in above-described embodiment, are the tool under present inventive concept
Body embodiment or preferred embodiment, rather than its limitations；Those skilled in the art, can be in present inventive concept and protection scope
It is adaptively adjusted.
The water-retaining type wet mixing mortar plasticizer of the above embodiment of the present invention preparation, molecular weight are 60000~100000.It will
Water-retaining type wet mixing mortar plasticizer prepared in the above embodiments, according to GB 8076-2008 " concrete admixture " and JGJ70-
2009 " test method standards of building mortar basic performance " carry out, and using standard cement, the initial consistency of mortar is controlled (90
± 10) mm, mortar mix ratio are shown in Table 1, and survey consistency, 2h consistency, water retention and the compression strength of mortar, acquired results such as table
Shown in 2.
1 wet mixing mortar match ratio of table
Wherein, C is indicated: cement；FA is indicated: flyash；S is indicated: sand；W is indicated: water；A is indicated: plasticizer.
The sample mortar performance that table 2 is synthesized using embodiment
Wherein, the plasticizer used in comparative example is commercially available ordinary mortar plasticizer；The sample mortar of each embodiment synthesis
In, in addition to plasticizer is different, remaining condition all keeps identical, and test condition and environment are also consistent.
As shown in Table 1, the sample synthesized using wet mixing mortar plasticizer prepared by the present invention, the increasing provided with the prior art
The sample of modeling agent synthesis is compared, and is lost with low consistency, preferable water retention and higher mortar compression strength, while corresponding
The long-time stability of performance are also higher, have significant progress.
Finally, it should be noted that although present invention has been described in detail with reference to the aforementioned embodiments, this field
Those of ordinary skill is it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments or right
Some or all of the technical features are equivalently replaced；And these are modified or replaceed, and do not make corresponding technical solution
Essence departs from the scope of the technical solutions of the embodiments of the present invention.
Claims (14)
1. a kind of preparation method of water-retaining type wet mixing mortar plasticizer, which comprises the following steps:
After polyether monomer, cumenyl polyoxyethylene ether, 2- amino -3- p-hydroxyphenyl propionic ester and co-catalyst are mixed, add
Enter initiator solution, the mixing of acrylic acid and 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester composition is separately added into after reaction
The solution B of solution A and initiator and chain-transferring agent composition adjusts pH=7~8 after reaction to get the wet-mixing is arrived
Mortar plasticizer.
2. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 1, which is characterized in that the 2- ammonia
Base -3- p-hydroxyphenyl propionic ester the preparation method comprises the following steps: by 2- amino -3- p-hydroxyphenyl propionic acid monomer and unsaturated alcohol according to 1:1
~3 weight ratio mixing, is added catalyst, esterification is carried out at 80~120 DEG C, extra unsaturated alcohol is removed, that is, makes
Obtain 2- amino -3- p-hydroxyphenyl propionic ester.
3. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 2, it is characterised in that: the unsaturation
Alcohol is at least one of propenyl, butenol, prenol.
4. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 2, it is characterised in that: the catalyst
For at least one of Monoammonium ferric sulfate dodecahydrate, sodium bisulfate monobydrate, eight water aluminum sulfate.
5. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 1, which is characterized in that the 3- hydroxyl
The preparation method of diphenylphosphoryl propionic acid dihydromyrcene alcohol ester includes:
3- hydroxy phenyl phosphinylidyne propionic acid and hexamethylene are added in reaction kettle, dihydromyrcenol is then added, is added simultaneously
732 cation exchange resins and hydroquinone, are stirred, and temperature is then risen to 30~60 DEG C and is reacted, filtered,
After air-distillation, 3- hydroxy phenyl phosphinylidyne propionic acid dihydromyrcene alcohol ester is obtained.
6. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 5, it is characterised in that: the 3- hydroxyl
Diphenylphosphoryl propionic acid, dihydromyrcenol mass ratio be 1:1~3,732 cation exchange resin dosages be 3- hydroxy phenyl phosphorus
The 0.5%~2% of acyl propionic acid quality, hydroquinone dosage are the 0.5%~1% of 3- hydroxy phenyl phosphinylidyne propionic acid quality, normal pressure
Vapo(u)rizing temperature is 70~75 DEG C.
7. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 1, it is characterised in that: the polyethers list
Body, cumenyl polyoxyethylene ether, acrylic acid, 2- amino -3- p-hydroxyphenyl propionic ester and 3- hydroxy phenyl phosphinylidyne propionic acid dihydro
The mass ratio of laurene alcohol ester is 80:10~20:5~10:5~10:5~10.
8. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 1, it is characterised in that: the polyethers list
Body is allyl polyethenoxy ether, methyl allyl polyoxyethylene ether or isopentene group polyoxyethylene ether, and molecular weight is 2400.
9. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 1, it is characterised in that: the co-catalysis
Agent is n,N-Dimethylaniline, N, at least one of N- diethylaniline or four aziridines.
10. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 1, it is characterised in that: the initiation
Agent is azo diisobutyl amidine hydrochloride, two isobutyl imidazoline hydrochloride of azo, azo dicyano valeric acid, azo diisopropyl miaow
At least one of oxazoline.
11. the preparation method of water-retaining type wet mixing mortar plasticizer according to claim 1, it is characterised in that: the chain turns
Shifting agent is pungent two mercaptan of 3,6- dioxy -1,8-.
12. according to the preparation method of the described in any item water-retaining type wet mixing mortar plasticizer of claim 9~11, feature exists
In: the 0.5%~1% of the dosage polyether monomer quality of the co-catalyst, the dosage of the initiator are polyether monomer quality
0.5%~2%, the dosage of chain-transferring agent is the 1%~2% of polyether monomer quality.
13. prepared by a kind of preparation method of any one according to claim 1~12 water-retaining type wet mixing mortar plasticizer
Water-retaining type wet mixing mortar plasticizer.
14. water-retaining type wet mixing mortar plasticizer according to claim 13, it is characterised in that: the water-retaining type wet mixing mortar
The molecular weight of plasticizer is 60000~100000.
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| CN110228962B (en) | 2021-10-29 |
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