CN109650764A - A kind of novel water-reducing agent and diminishing composition - Google Patents
A kind of novel water-reducing agent and diminishing composition Download PDFInfo
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- CN109650764A CN109650764A CN201811608801.0A CN201811608801A CN109650764A CN 109650764 A CN109650764 A CN 109650764A CN 201811608801 A CN201811608801 A CN 201811608801A CN 109650764 A CN109650764 A CN 109650764A
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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
-
- 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
- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- 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
- C04B2103/302—Water reducers
Abstract
The present invention provides a kind of novel water-reducing agent and diminishing composition, which is characterized in that including according to parts by weight: 28-53 parts of alginic acid-ginkgo silicate fiber, 42-68 parts of unsaturated polyethers, 16-29 parts of unsaturated carboxylic acids.Novel water-reducing agent provided by the invention, the advantages of with lignin sulfonate water-reducing agent and poly carboxylic acid series water reducer, do not have its original limitation simultaneously, utilize the surface-active action of ginkgo acid molecular structures, and its complementarity with water-reducing agent molecular structure, improve the flowing peptizaiton of water-reducing agent, while alginate fibre molecular structure can avoid the occurrence of bleeding, hardened phenomenon, the shrinking percentage of concrete is effectively reduced simultaneously, makes it have the stable advantage of strength development.
Description
Technical field
The present invention relates to cement additive technical fields, and in particular to a kind of novel water-reducing agent and diminishing composition.
Background technique
Currently, the demand of building materials is more and more, and to its performance requirement with the continuous development of its people's construction
It is higher and higher.Cement concrete is common construction material, in order to meet the needs of different performance, usually in cement concrete
Add various additives, it may be said that additive has become in cement concrete, the 5th in addition to cement, sand, stone, water yuan
Element.Wherein, water-reducing agent is the most commonly used one kind.
Water-reducing agent is one kind of concrete admixture, newly mixes and stirs concrete performance for improving.Subtract when being added in cement
After aqua, under conditions of not changing mixed system composition, the workability and the slump of concrete mix can be increased；Or mixed
Under the workability permanence condition of solidifying soil mixture, mixing water amount is reduced to improve the intensity and durability of concrete, and reduce
Because of caused by the aquation of cement phenomena such as fission, contraction and thermal deformation.In general, the addition of water-reducing agent can guarantee
In the case where mixed system is constant, the ratio of mud is substantially reduced, improves the workability and slump retaining of concrete, while also being improved mixed
Coagulate the intensity and compactness of soil；Either in the case where grade strength is constant, unit cement consumption, save the cost are reduced.
Novel high performance water-reducer or all kinds of water-reducing agents can be used in compounding be the development of following water-reducing agent new direction,
The development of water-reducing agent should be dedicated to optimizing the molecular structure and dispersibility of water-reducing agent, more preferably in conjunction with the development of macromolecule subject
Play water-reducing effect.
Summary of the invention
In view of this, the present invention provides a kind of novel water-reducing agent and diminishing composition, novel water-reducing agent provided by the invention,
The advantages of with lignin sulfonate water-reducing agent and poly carboxylic acid series water reducer, while not having its original limitation, i.e.,
Using the surface-active action of ginkgo acid molecular structures, and its complementarity with water-reducing agent molecular structure, make the flowing of water-reducing agent
Peptizaiton improves, while alginate fibre molecular structure can avoid the occurrence of bleeding, hardened phenomenon, while be effectively reduced mixed
The shrinking percentage for coagulating soil, makes it have the stable advantage of strength development.
The technical solution of the present invention is as follows: a kind of novel water-reducing agent, which is characterized in that including according to parts by weight: 28-53 parts
Alginic acid-ginkgo silicate fiber, 42-68 parts of unsaturated polyethers, 16-29 parts of unsaturated carboxylic acids；The alginic acid-ginkgo silicate fiber point
Minor structure are as follows:
,
Wherein, X=2-8, n=45-60, A are ginkgoic acid.
Further, the general structure of the ginkgoic acid is；
Further, the unsaturated polyether is allyl polyethenoxy ether, isobutene polyoxyethylene ether or iso-amylene polyoxy second
One of alkene ether.
Further, the unsaturated carboxylic acid is acrylic or methacrylic acid.
Further, the unsaturated polyether general structure is
；
Further, the unsaturated carboxylic acid general structure is
,
Wherein, R representative-CH=CH- (CH2) 5-CH3 ,-(CH2) 2-CH=CH- (CH2) 5-CH3 ,-CH=CHCH2CH=CH
(CH2) one of 2CH3 or-CH=CHCH2CH=CHCH2CH=CH2；R1 represents hydrogen atom or methyl；R2 represents hydrogen original
Son or methyl；Each R3 independently represents an oxyalkylene group, and polymerization degree n is 1~94；R4 is OM, and wherein M is H or monoacidic base
Metal ion.
Further, the preparation method of the water-reducing agent is to include the following steps:
S1. unsaturated polyether and alginic acid-ginkgo silicate fiber point are mixed in water；
S2. after the step S1 solution prepared being warming up to 20-80 DEG C, the aqueous solution of unsaturated carboxylic acid is added dropwise simultaneously thereto respectively
And the aqueous solution of initiator and chain-transferring agent, the time that the aqueous solution of unsaturated carboxylic acid is added dropwise is 2-2.5 hours, is added dropwise and causes
The time of the aqueous solution of agent and chain-transferring agent be 3-3.5 hour, after being added dropwise continuation 20-80 DEG C reaction 1-2 hours；Its
In, the initiator is ammonium peroxydisulfate, and chain-transferring agent is mercaptopropionic acid.
S3. it cools down, it is 6-7 to get to the water-reducing agent that system, which is neutralized to pH value, with liquid alkaline.
Further, the novel water-reducing agent includes according to parts by weight: 46 parts of alginic acid-ginkgo silicate fiber, 54 parts are not
It is saturated polyethers, 23 parts of unsaturated carboxylic acids.
Further, the water-reducing agent is alginic acid-ginkgo silicate fiber, unsaturated polyether, unsaturated carboxylic acid are polymerized
Random copolymer.
The novel water-reducing agent used in the present invention forms alginic acid-silver by alginate fibre and ginkgoic acid by polymerization reaction
Apricot silicate fiber；Wherein, the alginate fibre is that poly- six are loaded in a manner of interfacial reaction covalent linkage by alginate fibre
Methylene guanidine salt obtains.Water-reducing agent of the present invention is the surface-active action for utilizing ginkgo acid molecular structures, and its is divided with water-reducing agent
The complementarity of minor structure improves the flowing peptizaiton of water-reducing agent, while alginate fibre molecular structure can avoid the occurrence of
Bleeding, hardened phenomenon, while the shrinking percentage of concrete is effectively reduced, make it have the stable advantage of strength development.Meanwhile this
The molecular structure of the unsaturated carboxylic acid of invention is arranged in concrete surface with dressing or ring-shaped, in this way its steric hindrance theory
Than other, above-mentioned water-reducing agent is much larger, effectively destroys the coherent structure of concrete, so that mixing water releases,
The workability of concrete is improved, constructing operation is convenient for.
Therefore, novel water-reducing agent provided by the invention, with lignin sulfonate water-reducing agent and polycarboxylic-acid diminishing
The advantages of agent, while not having its original limitation.Water-reducing agent of the invention can be adsorbed on cement particle surface, then in cement
Particle surface, which forms one layer, certain thickness polymer molecule adsorption layer.When cement granules are close, adsorption layer starts to be overlapped, i.e.,
Repulsion effect is generated between particles, and overlapping is more, and repulsion is bigger.It is this due to polymer adsorbed layers close to overlapping and generate
The mechanically decoupled active force for preventing cement granules close just can have significant point to cement granules in the lesser situation of volume
Dissipate effect.In addition, the present invention can also be adsorbed in solid liquid interface, and can be adsorbed on liquid gas interface, make concrete mix
In be easily formed many micro-bubbles.Water-reducing agent molecular orientation is arranged on the liquid gas interface of bubble, and bubble surface is made to form one
Layer hydration shell, while taking charge identical with cement granules.Between bubble and bubble, generated between bubble and cement granules
Electrostatic repulsion, the sum of concrete mix can be improved so that cement granules be prevented to agglomerate by generating buffer action to cement granules
Yi Xing.
The present invention also provides a kind of diminishing compositions, which is characterized in that including following parts by weight meter component: 52-78 parts
Water-reducing agent, 9-17 part anhydrous sodium sulfite, 5-13 parts of rosin soaps, 18-31 parts of zinc stearates, 8-24 parts of polypropylene grafted maleic acids
Acid anhydride graft polymers.The polypropylene grafted maleic anhydride graft polymers is the diformazan using dibenzoyl peroxide as initiator
Benzene is interfacial agents, and the solid phase reaction of grafted maleic anhydride (MAH) is carried out using superfine polypropylene (PP) particle, passes through the prior art
Prepare PP grafting MAH graft polymers (PP-g-MAH).
Further, the diminishing composition, including following parts by weight meter component: 57-72 parts of water-reducing agents, 11-15 parts
Anhydrous sodium sulfite, 7-10 part rosin soap, 21-28 parts of zinc stearates, 10-20 parts of polypropylene grafted maleic anhydrides are graft-polymerized
Object.
Further, the diminishing composition, including following parts by weight meter component: 68 parts of water-reducing agents, 13 parts of anhydrous sodiums
Sodium sulphate, 9 parts of rosin soaps, 24 parts of zinc stearates, 14 parts of polypropylene grafted maleic anhydride graft polymers.
Diminishing composition of the invention further enhances its water-reducing effect by anhydrous sodium sulfite, rosin soap；It is stearic
Sour zinc, polypropylene grafted maleic anhydride grafting are compounded with water-reducing agent synergistic, can effectively improve its pressure resistance being added after concrete
Degree.After concrete is added in diminishing composition of the present invention, early stage aquation, since the high degree of dispersion effect of water-reducing agent increases water
The contact area of mud and water improves degree of hydration, and the hydrated product in unit volume increases, and accelerates the aquation of early stage, from
Macroscopically see that early strength increases.On the other hand water-reducing agent again slightly delays hydration rate in hydration process, this
Early stage is acted on since the influence of peptizaiton is still unobvious, but the good action from the middle and later periods, it inhibits gelinite
Transformation to crystalline solid, thus be conducive to crystalline growth, increase the crystallization of long fibre shape, this long stapled hydrated calcium silicate knot
Crystalline substance, surface can be big, and contact point is more, are interleaved with each other together and formed fine and close spacial framework, the hole inside Behavior of Hardened Cement Paste
Gap, which is divided filling, becomes tiny, this has been considerably improved the intensity of Behavior of Hardened Cement Paste.Meanwhile the reduction of mixing water makes to harden coagulation
The porosity of soil reduces, and pore-size distribution is mobile to aperture direction, increases the density of concrete, can effectively enhance concrete
Durability.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment 1
A kind of novel water-reducing agent, which is characterized in that including according to parts by weight: 46 parts of alginic acid-ginkgo silicate fiber, 54 parts of insatiable hungers
And polyethers, 23 parts of unsaturated carboxylic acids；The alginic acid-ginkgo hydrochlorate fibrous molecular structure are as follows:
,
Wherein, X=6, n=52, A are ginkgoic acid.
Further, the general structure of the ginkgoic acid is；
Further, the unsaturated polyether is allyl polyethenoxy ether.
Further, the unsaturated carboxylic acid is acrylic acid.
Further, the unsaturated polyether general structure is
；
Further, the unsaturated carboxylic acid general structure is
,
Wherein, R representative-CH=CH- (CH2) 5-CH3 ,-(CH2) 2-CH=CH- (CH2) 5-CH3 ,-CH=CHCH2CH=CH
(CH2) one of 2CH3 or-CH=CHCH2CH=CHCH2CH=CH2；R1 represents hydrogen atom or methyl；R2 represents hydrogen original
Son or methyl；Each R3 independently represents an oxyalkylene group, and polymerization degree n is 1~94；R4 is OM, and wherein M is H or monoacidic base
Metal ion.
Further, the preparation method of the water-reducing agent is to include the following steps:
S1. unsaturated polyether and alginic acid-ginkgo silicate fiber point are mixed in water；
S2. after the step S1 solution prepared being warming up to 20-80 DEG C, the aqueous solution of unsaturated carboxylic acid is added dropwise simultaneously thereto respectively
And the aqueous solution of initiator and chain-transferring agent, the time that the aqueous solution of unsaturated carboxylic acid is added dropwise is 2-2.5 hours, is added dropwise and causes
The time of the aqueous solution of agent and chain-transferring agent be 3-3.5 hour, after being added dropwise continuation 20-80 DEG C reaction 1-2 hours；Its
In, the initiator is ammonium peroxydisulfate, and chain-transferring agent is mercaptopropionic acid.
S3. it cools down, it is 6-7 to get to the water-reducing agent that system, which is neutralized to pH value, with liquid alkaline.
Further, the water-reducing agent is alginic acid-ginkgo silicate fiber, unsaturated polyether, unsaturated carboxylic acid are polymerized
Random copolymer.
Embodiment 2
The present embodiment provides a kind of with embodiment 1 using the water-reducing agent of same method preparation, the difference is that
Including according to parts by weight: 38 parts of alginic acid-ginkgo silicate fiber, 61 parts of unsaturated polyethers, 25 parts of unsaturated carboxylic acids；It is described
Alginic acid-ginkgo hydrochlorate fibrous molecular structure are as follows:
,
Wherein, X=4, n=52, A are ginkgoic acid.
Further, the unsaturated polyether is isobutene polyoxyethylene ether.
Further, the unsaturated carboxylic acid is methacrylic acid.
Further, the water-reducing agent is alginic acid-ginkgo silicate fiber, unsaturated polyether, unsaturated carboxylic acid are polymerized
Random copolymer.
Embodiment 3
The present embodiment provides a kind of with embodiment 1 using the water-reducing agent of same method preparation, the difference is that
Including according to parts by weight: 28 parts of alginic acid-ginkgo silicate fiber, 42 parts of unsaturated polyethers, 16 parts of unsaturated carboxylic acids；It is described
Alginic acid-ginkgo hydrochlorate fibrous molecular structure are as follows:
,
Wherein, X=2, n=45, A are ginkgoic acid.
Further, the unsaturated polyether is iso-amylene polyoxyethylene ether.
Further, the unsaturated carboxylic acid is acrylic acid.
Further, the water-reducing agent is alginic acid-ginkgo silicate fiber, unsaturated polyether, unsaturated carboxylic acid are polymerized
Random copolymer.
Embodiment 4
The present embodiment provides a kind of with embodiment 1 using the water-reducing agent of same method preparation, the difference is that
Including according to parts by weight: 53 parts of alginic acid-ginkgo silicate fiber, 68 parts of unsaturated polyethers, 29 parts of unsaturated carboxylic acids；
The alginic acid-ginkgo hydrochlorate fibrous molecular structure are as follows:
,
Wherein, X=8, n=60, A are ginkgoic acid.
Further, the unsaturated polyether is allyl polyethenoxy ether.
Further, the unsaturated carboxylic acid is methacrylic acid.
Further, the water-reducing agent is alginic acid-ginkgo silicate fiber, unsaturated polyether, unsaturated carboxylic acid are polymerized
Random copolymer.
Embodiment 5
A kind of diminishing composition, which is characterized in that including following parts by weight meter component: the water-reducing agent of 52 parts of embodiments 2,9 parts
Anhydrous sodium sulfite, 5 parts of rosin soaps, 18 parts of zinc stearates, 8 parts of polypropylene grafted maleic anhydride graft polymers.
Embodiment 6
A kind of diminishing composition, which is characterized in that including following parts by weight meter component: the water-reducing agent of 78 parts of embodiments 2,17
Part anhydrous sodium sulfite, 13 parts of rosin soaps, 31 parts of zinc stearates, 24 parts of polypropylene grafted maleic anhydride graft polymers.
Embodiment 7
A kind of diminishing composition, including following parts by weight meter component: the water-reducing agent of 57 parts of embodiments 1,11 parts of anhydrous sulfurous acid
Sodium, 7 parts of rosin soaps, 21 parts of zinc stearates, 10 parts of polypropylene grafted maleic anhydride graft polymers.
Embodiment 8
A kind of diminishing composition, including following parts by weight meter component: the water-reducing agent of 72 parts of embodiments 1,15 parts of anhydrous sulfurous acid
Sodium, 10 parts of rosin soaps, 28 parts of zinc stearates, 20 parts of polypropylene grafted maleic anhydride graft polymers.
Embodiment 9
A kind of diminishing composition, including following parts by weight meter component: the water-reducing agent of 68 parts of embodiments 1,13 parts of anhydrous sulfurous acid
Sodium, 9 parts of rosin soaps, 24 parts of zinc stearates, 14 parts of polypropylene grafted maleic anhydride graft polymers.
Comparative example 1
A kind of diminishing composition, including following parts by weight meter component: the water-reducing agent of 68 parts of embodiments 1,13 parts of anhydrous sulfurous acid
Sodium, 9 parts of rosin soaps.
Comparative example 2
A kind of diminishing composition, including following parts by weight meter component: the water-reducing agent of 68 parts of embodiments 1,24 parts of zinc stearates, 14
Part polypropylene grafted maleic anhydride graft polymers.
Test effect test
In this experimental design, each raw material component is as shown in table 3, and wherein experimental design 3 is the prior art, and additive is using existing
There is the PCA-I high performance water reducing agent of polyocarboxy acid in technology；The PCA-I carboxylic acid high-performance water reducing agent is by Jiangsu Province's division of construction
The compound additive based on carboxylic acids graft polymers that research institute develops is learned, there is big diminishing, Self-leveling, Gao Bao
It collapses, the functions such as Gao Zengqiang, high-durability.Product is strong to cement adaptability, and volume is low, easy to use, especially suitable for upper flow regime,
High-thin arch dam, high-strength super high strength concrete engineering.Illustrated according to official, detect PCA(I by " concrete admixture " national standard) type
Water-reducing rate is 30% or more.
The small wild water in field mud in the Jiangnan that test cement used is P × II52.5, chemical component are shown in Table 1, physical property
Index is shown in Table 2；Slag powders: high-quality slag powders；Fine aggregate: meet the requirement of sand in the area II, but be in middle sand upper limit level；Thick bone
Material: meet the requirement of 5~25mm continuous grading；Water: tap water；Additive uses 1-9 of embodiment of the present invention embodiment, comparative example 1-
Water-reducing agent or diminishing composition in 2, are prepared the concrete of test example 1-11, and experimental design 3 prepares test example 12
Concrete, and according to national standard carry out construction testing；The physical property of fresh concrete is tested, while anti-to its 7 days
Compressive Strength and 28 days compression strength are tested, as a result as shown in table 4-9.
The chemical component of the cement in the prior art of table 1
The physical performance index of 2 cement of table
3 experimental design match ratio of table
The physical property of 4 experimental design of table, 1 fresh concrete
| Experimental group | The slump/cm | Divergence average value/cm | Bulk density (kg/m3) |
| Test group 1 | 16.3 | 35.7 | 1780 |
| Test group 2 | 16.8 | 36.8 | 1834 |
| Test group 3 | 17.6 | 38.6 | 1922 |
| Test group 4 | 18.2 | 39.9 | 1987 |
| Test group 5 | 15.9 | 34.8 | 1736 |
| Test group 6 | 16.1 | 35.3 | 1758 |
| Test group 7 | 13.4 | 29.4 | 1463 |
| Test group 8 | 12.9 | 28.3 | 1409 |
| Test group 9 | 10.7 | 23.4 | 1168 |
| Test group 10 | 17.9 | 39.2 | 1955 |
| Test group 11 | 18.3 | 40.1 | 1998 |
The physical property of 5 experimental design of table, 2 fresh concrete
| Experimental group | The slump/cm | Divergence average value/cm | Bulk density (kg/m3) |
| Test group 1 | 14.3 | 31.4 | 1566 |
| Test group 2 | 15.0 | 32.8 | 1633 |
| Test group 3 | 15.8 | 34.7 | 1730 |
| Test group 4 | 16.6 | 36.3 | 1808 |
| Test group 5 | 13.8 | 30.3 | 1510 |
| Test group 6 | 14.3 | 31.4 | 1565 |
| Test group 7 | 11.8 | 25.8 | 1288 |
| Test group 8 | 11.7 | 25.7 | 1282 |
| Test group 9 | 9.1 | 19.9 | 1093 |
| Test group 10 | 16.5 | 36.1 | 1798 |
| Test group 11 | 17.2 | 37.7 | 1878 |
The physical property of 6 experimental design of table, 3 fresh concrete
| Experimental group | The slump/cm | Divergence average value/cm | Bulk density (kg/m3) |
| Test group 12 | 20.5 | 45.1 | 2283 |
7 experimental design of table, 1 concrete seven day and 28 days intensity tests
| Experimental group | Compression strength 7d/MPa | Compression strength 28d/MPa |
| Test group 1 | 43.71 | 53.43 |
| Test group 2 | 42.86 | 52.53 |
| Test group 3 | 39.28 | 48.26 |
| Test group 4 | 40.03 | 49.31 |
| Test group 5 | 45.21 | 55.27 |
| Test group 6 | 46.08 | 56.59 |
| Test group 7 | 47.92 | 58.76 |
| Test group 8 | 47.84 | 59.05 |
| Test group 9 | 49.55 | 60.45 |
| Test group 10 | 44.03 | 52.66 |
| Test group 11 | 44.96 | 53.07 |
8 experimental design of table, 2 concrete seven day and 28 days intensity tests
| Experimental group | Compression strength 7d/MPa | Compression strength 28d/MPa |
| Test group 1 | 46.93 | 64.66 |
| Test group 2 | 46.54 | 63.73 |
| Test group 3 | 43.13 | 58.71 |
| Test group 4 | 44.44 | 60.14 |
| Test group 5 | 47.99 | 66.88 |
| Test group 6 | 50.03 | 68.80 |
| Test group 7 | 51.45 | 71.33 |
| Test group 8 | 53.11 | 72.17 |
| Test group 9 | 51.38 | 73.01 |
| Test group 10 | 49.42 | 63.96 |
| Test group 11 | 51.56 | 65.82 |
9 experimental design of table, 3 concrete seven day and 28 days intensity tests
| Experimental group | Compression strength 7d/MPa | Compression strength 28d/MPa |
| Test group 12 | 36.91 | 43.25 |
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, and do not carrying on the back
In the case where from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter from which
From the point of view of a bit, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is wanted by appended right
Ask rather than above description limit, it is intended that by all changes that come within the meaning and range of equivalency of the claims
It is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.It is noted that the technical characteristic being not described in detail in the present invention, can pass through this
Field any prior art is realized.
Claims (9)
1. a kind of novel water-reducing agent, which is characterized in that including according to parts by weight: 28-53 parts of alginic acid-ginkgo silicate fiber, 42-
68 parts of unsaturated polyethers, 16-29 parts of unsaturated carboxylic acids；The alginic acid-ginkgo hydrochlorate fibrous molecular structure are as follows:
,
Wherein, X=2-8, n=45-60, A are ginkgoic acid.
2. novel water-reducing agent according to claim 1, which is characterized in that the general structure of the ginkgoic acid is
。
3. novel water-reducing agent according to claim 1, which is characterized in that the unsaturated polyether is allyl polyethenoxy
One of ether, isobutene polyoxyethylene ether or iso-amylene polyoxyethylene ether.
4. novel water-reducing agent according to claim 1, which is characterized in that the unsaturated carboxylic acid is acrylic acid or methyl-prop
Olefin(e) acid.
5. novel water-reducing agent according to claim 1, which is characterized in that including according to parts by weight: 46 parts of alginic acid-ginkgoes
Silicate fiber, 54 parts of unsaturated polyethers, 23 parts of unsaturated carboxylic acids.
6. novel water-reducing agent according to claim 1, which is characterized in that the water-reducing agent be alginic acid-ginkgo silicate fiber,
The random copolymer that unsaturated polyether, unsaturated carboxylic acid are polymerized.
7. a kind of diminishing composition, which is characterized in that including following parts by weight meter component: 52-78 parts of water-reducing agents, 9-17 parts of nothings
Water sodium sulfite, 5-13 part rosin soap, 18-31 parts of zinc stearates, 8-24 parts of polypropylene grafted maleic anhydride graft polymers.
8. a kind of diminishing composition according to claim 7, which is characterized in that including following parts by weight meter component: 57-
72 parts of water-reducing agents, 11-15 parts of anhydrous sodium sulfites, 7-10 parts of rosin soaps, 21-28 parts of zinc stearates, 10-20 parts it is polypropylene grafted
Maleic anhydride grafted polymer.
9. a kind of diminishing composition according to claim 7, which is characterized in that including following parts by weight meter component: 68
Part water-reducing agent, 13 parts of anhydrous sodium sulfites, 9 parts of rosin soaps, 24 parts of zinc stearates, 14 parts of polypropylene grafted maleic anhydrides grafting are poly-
Close object.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116514437A (en) * | 2023-07-04 | 2023-08-01 | 北京鼎瀚中航建设有限公司 | Composite anti-mud water reducer and preparation method thereof |
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| CN116514437B (en) * | 2023-07-04 | 2023-08-25 | 北京鼎瀚中航建设有限公司 | Composite anti-mud water reducer and preparation method thereof |
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