CN109455979A - A kind of water-repellent modified cement and preparation method thereof - Google Patents
A kind of water-repellent modified cement and preparation method thereof Download PDFInfo
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- CN109455979A CN109455979A CN201811529137.0A CN201811529137A CN109455979A CN 109455979 A CN109455979 A CN 109455979A CN 201811529137 A CN201811529137 A CN 201811529137A CN 109455979 A CN109455979 A CN 109455979A
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/22—Glass ; Devitrified glass
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The present invention relates to the technical fields of cement material, more particularly to a kind of water-repellent modified cement, raw material including following parts by weight: the weight of 60-100 parts of lime stone, 5-15 parts of flyash, 5-10 parts of montmorillonite, 3-8 parts of diatomite, 20-45 parts of quartz sand, 3-8 parts of water-reducing agent, 3-6 parts of dispersing agent, 30-50 parts of polyacrylate dispersion, 5-10 parts of hollow glass micropearl and 60-150 parts of water, the polyacrylate dispersion and hollow glass micropearl is 5-8；The waterproof impervious characteristic of cement can be improved；The present invention also provides the preparation methods of above-mentioned water-repellent modified cement, hollow glass micropearl are added, and be stirred with the speed of 50-80r/min in three times, are prepared, and hollow glass micropearl is enable to guarantee structural intergrity.
Description
Technical field
The present invention relates to the technical fields of cement material, and in particular to a kind of water-repellent modified cement and preparation method thereof.
Background technique
Cement is the higher construction material of the most frequently used in modern architecture and intensity, applies to building construction, surface road is repaired
Build etc..In cement process, in order to improve the uniformly dispersed of each raw material component, the density and synthesis of cement are improved
Emulsifier, the auxiliary agents such as dispersing agent and various partial sizes different filler can be added in performance while being stirred, granular
In solid and liquid mixed process, bubble can be generated, if taking no action to, can make to remain more bubble in cement and influence
The dispersing uniformity of material will cause the integral strength decline of cement, situations such as easily cracking at foaming, one after hardening
Denier cracking can then be such that extraneous moisture penetrates into inside cement layer by crack, keep cement products anti-permeability performance poor.
In the prior art, in order to overcome the foaming situation in cement process, the method that defoaming agent is added is mostly used
It eliminates or weakens frothing percentage, although having the effect of certain, still have part gas bubbles left shadow in cured cement
The impervious waterproof performance of Xiangshui County's mud.
The application for a patent for invention that application publication number is CN 107365139A disclose a kind of modified cement of high-effective water-proof and its
Preparation method includes following raw material according to parts by weight: 80~100 parts of cement, 30~50 parts of quartz sand, 20~40 parts of fine sand, swollen
Moisten native 20~30 parts, 10~35 parts of talcum powder, 40~60 parts of modified propylene acid butyl ester lotion, 0~20 part of silica 1, hydrogen-oxygen
Change 15~20 parts of calcium, 8~10 parts of silicone acrylic emulsion, 7~13 parts of glyceryl tristearate, 9~18 parts of defoaming agent, additive 5~15
Part, 4~12 parts of water-reducing agent, 8~16 parts of preservative, 5~10 parts of dispersing agent, 6~9 parts of fire retardant and water.The modified propylene of addition
Acid butyl ester lotion can enhance the tightness inside cement, tightly block molecule gap, improve the waterproofness of cement, so as to prevent
Moisture penetration and cracking.But modified propylene acid butyl ester lotion and the solid particles such as silicone acrylic emulsion itself and quartz sand are stirring
A large amount of bubbles will be generated in mixed process, therefore, modified propylene acid butyl ester lotion is while filling concrete internal voids, meeting
Remain in inside cement with many tiny bubbles, these tiny bubbles out are bred with the molten of silicone acrylic emulsion and at filling,
Although the dispersibility influence on each aggregate is smaller, make to can satisfy certain tightness inside cement, once cement cracks
Or there is crack, then crack can be caused increasingly longer, to influence the water proof anti-seepage of cement in band-like chain between tiny bubble
Performance and intensity.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention is to provide a kind of water-repellent modified cement, it can
To improve the waterproof impervious characteristic of cement.
The first purpose of this invention is achieved through the following technical solutions:
A kind of water-repellent modified cement, the raw material including following parts by weight: 60-100 parts of lime stone, 5-15 parts of flyash, montmorillonite
5-10 parts, 3-8 parts of diatomite, 20-45 parts of quartz sand, 3-8 parts of water-reducing agent, 3-6 parts of dispersing agent, polyacrylate dispersion 30-50
The parts by weight of part, 5-10 parts of hollow glass micropearl and 60-150 parts of water, the polyacrylate dispersion and hollow glass micropearl are matched
Than for 5-8.
By using above-mentioned technical proposal, hollow glass micropearl is small sphere, and ball-type rate is big, compares table with the smallest
Area, it can have good dispersibility in cement aggregate mixture, it is easy to be compacted it is closely knit, therefore it have it is very high
Filling capacity；There is preferable cold-and-heat resistent shrinkage containing gas in hollow glass micropearl, so that the temperature resistance for enhancing cement becomes
Performance reduces cement and causes to crack because being affected by thermal expansion and contraction, so as to improve the anti-permeability performance of cement.Polyacrylate
Lotion (NBS copolymer), is acrylate copolymer emulsion, is a kind of aqueous dispersion of high molecular polymer, and cement mortar is added
In after formed polymer cement mortar, make mortar have excellent bonding, cracking resistance, freeze proof, antiseepage, anti-corrosion, chloride-penetration resistance,
Ageing-resistant and corrosion resisting property.By being added in aggregate lime stone, flyash, montmorillonite, diatomite and quartz sand in the present invention
Polyacrylate dispersion and hollow glass micropearl, and the addition proportion both controlled, hollow glass micropearl will generate in cement
Bubble closure make bubble closed pore, polyacrylate dispersion can improve the adhesive property between aggregate, keep structure more closely knit and with
Cement slurry interpenetrating matrix, polymer are packed in the gap duct that hollow glass micropearl and aggregate are formed, improve in cement
The compactness in portion.Polyacrylate dispersion and hollow glass micropearl cooperate, and will form hole-closing structure inside cement aggregate, are being not necessarily to
In the case where using defoaming agent, the bubble inside cement can be reduced, keeps cement internal structure even closer, enhances cement
Intensity, reduces the cracking rate of cement, to enhance the impervious waterproof performance of cement.
Preferably, include following parts by weight raw material: 70-90 parts of lime stone, 8-12 parts of flyash, 5-8 parts of montmorillonite,
It is 3-5 parts of diatomite, 25-40 parts of quartz sand, 3-5 parts of water-reducing agent, 3-5 parts of dispersing agent, 30-40 parts of polyacrylate dispersion, hollow
The weight of 5-8 parts of glass microballoon and water 70-100 part, the polyacrylate dispersion and hollow glass micropearl is 6-8.
By using above-mentioned technical proposal, optimize each component content, makes cement that there is better waterproof impervious characteristic.
Preferably, the partial size of the diatomite is 900-1000 mesh, calcines and be made at 950 DEG C.
Preferably, the partial size of the lime stone and quartz sand is 220-250 mesh.
By using above-mentioned technical proposal, the partial size of aggregate is reduced, is guaranteeing that aggregate can satisfy the basis of strength of cement
On, dispersing uniformity of the aggregate in cement is further increased, to further increase the tightness inside cement.
Preferably, the water-reducing agent is polycarboxylate high performance water-reducing agent.
By using above-mentioned technical proposal, polycarboxylate high performance water-reducing agent, due to being truly realized according to dispersion cement
The mechanism of action designs effective molecular structure, has ultra-dispersed type, and concrete slump loss can be prevented obviously slow without causing
It is solidifying, play higher plasticizing effect under low-dosage, mobility retentivity is good, freedom degree is big in molecular configuration, enhances concrete
The technical performances features such as significant effect, can reduce concrete shrinkage, and harmful substance contents are extremely low impart excellent resistance to of concrete
Long property.Polycarboxylate high performance water-reducing agent has the characteristics that good comprehensive technical performance advantage and environmental protection, meets modernization coagulation
The needs of geotechnological journey.
Preferably, the dispersing agent is vinyl bis-stearamides.
By using above-mentioned technical proposal, vinyl bis-stearamides are also known as ethylene bis stearamide (EBS), the compound
For hard and crisp white high melting-point wax, industrial goods are the fine particle in yellowish, nontoxic, without side-effects to human body, are added
Enter in cement, cold temperature Plastic Flow can be reduced, under the premise of non-brittle, increases water-fast, the acidproof and salt water resistance spray of cement
The performances such as mist.
A second object of the present invention is to provide a kind of preparation methods of above-mentioned water-repellent modified cement, are prepared with anti-
Seep the modification cement of waterproof performance.
Second object of the present invention is realized by following technical solution:
A kind of preparation method of water-repellent modified cement, including following operating procedure:
Lime stone, flyash and montmorillonite are added to the water of 1/3 water inventory, mixing obtains mixture A；
Diatomite, quartz sand and water-reducing agent are added to the water of 1/3 water inventory, mixing obtains mixture B；
The water of polyacrylate dispersion and surplus is uniformly mixed, hollow glass micropearl is added in three times, it is total that 1/2 is added for the first time
The hollow glass of 1/4 total amount is added in the hollow glass micropearl of amount, the hollow glass micropearl of second of 1/4 total amount of addition, third time
Microballon is added after hollow glass micropearl every time and stirs 3-5min with the speed of 50-80r/min, obtains mixture C；
Dispersing agent, mixture A, mixture B are added in mixture C, 5-10min is stirred with the speed of 50-80r/min, is obtained
Water-repellent modified cement.
By using above-mentioned technical proposal, adds water to be mixed lime stone, flyash and montmorillonite, obtains aggregate one,
That is mixture A；Diatomite is uniformly mixed with quartz sand cooperation water-reducing agent, obtains aggregate two, i.e. mixture B；Hollow glass
Microballon is added into polyacrylate dispersion in three times, is gradually added, and hollow glass micropearl floating can be avoided to gather well
A certain position in cement, to keep dispersion more complete, and hollow glass micropearl is by the bubble sealing of hole of polyacrylate dispersion；Add
Control guarantees the structural intergrity of hollow glass micropearl, to guarantee under mild mixing speed when entering hollow glass micropearl
It can be supported with Developed fiber strength and be acted on sealing of hole.Dispersing agent, mixture A, mixture B are added in mixture C, mild stirring
Under speed, aggregate is made to be uniformly dispersed, polyacrylate dispersion is packed in the gap duct that hollow glass micropearl and aggregate are formed,
Inner tight and the water-repellent modified cement with anti-permeability performance is finally prepared.
Preferably, being stirred 15-25min in the speed of 300-500r/min in the preparation process of the mixture A
After carry out ball milling, mixture A is obtained after ball milling 10-20min.
Preferably, being stirred 10-20min in the speed of 300-500r/min in the preparation process of the mixture B
After carry out ball milling, mixture B is obtained after ball milling 10-15min.
By using above-mentioned technical proposal, keep the mixture A being stirred and mixture B granular size more equal
It is even, conducive to being uniformly dispersed.
In conclusion the invention has the following beneficial effects:
(1) it is played a role by the way that hollow glass micropearl and polyacrylate dispersion, the two coordinated are added into raw material, makes this
The anti-permeability performance and compression strength of the water-repellent modified cement of invention reach II type, and the impermeability pressure of 28d is up to 2.2Mpa, resist
Compressive Strength is up to 54.0Mpa, and water absorption rate is minimum to be down to 2.8%；
(2) by the proportion of control hollow glass micropearl and polyacrylate dispersion, make every detection of the modified cement of the present invention
As a result reach the excellent performance of II type；
(3) it is added in batches by controlling hollow glass micropearl, and controls mixing speed, kept hollow glass micropearl
Whole structure, so that it be enable to play a role.
Specific embodiment
The contents of the present invention are further detailed combined with specific embodiments below.
Water-reducing agent in the present invention is polycarboxylate high performance water-reducing agent, is selected from Nantong Run Feng petrochemical industry Co., Ltd,
Solid content 20 ± 2%, density 1.08 ± 0.02g/ml, pH 6-7, chloride ion < 0.05, flowing degree of net paste of cement, W/C=0.29
≥250mm.Dispersing agent is vinyl bis-stearamides, and molybdenum content >=99%, granularity is 5000 mesh, trade mark MP-1.Polyacrylic acid
Ester lotion is selected from the good conjunction day in Beijing into Technew SA, TH model.
Embodiment 1
A kind of water-repellent modified cement, is prepared by following operating procedure:
Pretreatment of raw material: it will be calcined at 950 DEG C and (method for calcinating has been the very mature prior art, and details are not described herein) is made
Diatomite cross 900 mesh mesh screens, it is spare that screening obtains the diatomite that partial size is 900 mesh；Lime stone and quartz sand are crossed into 220 mesh nets
Sieve, screening obtains the lime stone that partial size is 220 mesh and quartz sand is spare.
Lime stone, flyash and montmorillonite: according to the additive amount in table 1, being added the water of 1/3 water inventory by aggregate mixing,
After the speed of 300r/min is stirred 25min, it is sent into ball mill and carries out ball milling, mixture A is obtained after ball milling 20min.
Diatomite, quartz sand and water-reducing agent: according to the additive amount in table 1, being added the water of 1/3 water inventory by aggregate mixing,
After the speed of 300r/min is stirred 20min, it is sent into ball mill and carries out ball milling, mixture B is obtained after ball milling 15min.
According to the additive amount in table 1, polyacrylate dispersion and the water (i.e. 1/3 water inventory) of surplus are uniformly mixed, point
Hollow glass micropearl is added three times, the hollow glass micropearl of 1/2 total amount is added for the first time, the hollow of 1/4 total amount is added for the second time
Glass microballoon, third time are added the hollow glass micropearl of 1/4 total amount, are added after hollow glass micropearl with 50r/min's every time
Speed stirs 5min, obtains mixture C.
According to the additive amount in table 1, dispersing agent, mixture A, mixture B are added in mixture C, with the speed of 50r/min
Degree stirring 10min, obtains water-repellent modified cement.
Embodiment 2
A kind of water-repellent modified cement, is prepared by following operating procedure:
Pretreatment of raw material: it will be calcined at 950 DEG C and (method for calcinating has been the very mature prior art, and details are not described herein) is made
Diatomite cross 1000 mesh mesh screens, it is spare that screening obtains the diatomite that partial size is 1000 mesh；Lime stone and quartz sand are crossed into 250 mesh
Mesh screen, screening obtains the lime stone that partial size is 250 mesh and quartz sand is spare.
Aggregate mixing: according to the additive amount in embodiment 1,1/3 water inventory is added in lime stone, flyash and montmorillonite
Water is sent into ball mill after the speed of 500r/min is stirred 20min and carries out ball milling, obtain mixture after ball milling 10min
A。
Aggregate mixing: according to the additive amount in embodiment 1,1/3 water inventory is added in diatomite, quartz sand and water-reducing agent
Water is sent into ball mill after the speed of 500r/min is stirred 10min and carries out ball milling, obtain mixture after ball milling 10min
B。
According to the additive amount in embodiment 1, polyacrylate dispersion and the water (i.e. 1/3 water inventory) of surplus are mixed equal
It is even, hollow glass micropearl is added in three times, the hollow glass micropearl of 1/2 total amount is added for the first time, 1/4 total amount is added for the second time
Hollow glass micropearl, third time are added the hollow glass micropearl of 1/4 total amount, are added after hollow glass micropearl with 80r/ every time
The speed of min stirs 3min, obtains mixture C.
According to the additive amount in embodiment 1, dispersing agent, mixture A, mixture B are added in mixture C, with 80r/min
Speed stir 5min, obtain water-repellent modified cement.
Embodiment 3
A kind of water-repellent modified cement, is prepared by following operating procedure:
Pretreatment of raw material: it will be calcined at 950 DEG C and (method for calcinating has been the very mature prior art, and details are not described herein) is made
Diatomite cross 960 mesh mesh screens, it is spare that screening obtains the diatomite that partial size is 960 mesh；Lime stone and quartz sand are crossed into 240 mesh nets
Sieve, screening obtains the lime stone that partial size is 240 mesh and quartz sand is spare.
Aggregate mixing: according to the additive amount in embodiment 1,1/3 water inventory is added in lime stone, flyash and montmorillonite
Water is sent into ball mill after the speed of 400r/min is stirred 15min and carries out ball milling, obtain mixture after ball milling 10min
A。
Aggregate mixing: according to the additive amount in embodiment 1,1/3 water inventory is added in diatomite, quartz sand and water-reducing agent
Water is sent into ball mill after the speed of 400r/min is stirred 15min and carries out ball milling, obtain mixture after ball milling 12min
B。
According to the additive amount in embodiment 1, polyacrylate dispersion and the water (i.e. 1/3 water inventory) of surplus are mixed equal
It is even, hollow glass micropearl is added in three times, the hollow glass micropearl of 1/2 total amount is added for the first time, 1/4 total amount is added for the second time
Hollow glass micropearl, third time are added the hollow glass micropearl of 1/4 total amount, are added after hollow glass micropearl with 66r/ every time
The speed of min stirs 3min, obtains mixture C.
According to the additive amount in embodiment 1, dispersing agent, mixture A, mixture B are added in mixture C, with 70r/min
Speed stir 5min, obtain water-repellent modified cement.
Embodiment 4-9
The preparation method of the water-repellent modified cement of embodiment 4-9 is identical with embodiment 3, and difference is adding for each raw material component
Dosage is different, and specific additive amount is shown in Table 1.
The additive amount of each raw material component of water-repellent modified cement is prepared in 1 embodiment 1-9 of table
Comparative example 1
Comparative example 1 and the difference of embodiment 3 are: without hollow glass micropearl in the raw material in comparative example 1, remaining and embodiment 3
It is consistent.
Comparative example 2
Comparative example 2 and the difference of embodiment 3 are: without polyacrylate dispersion in the raw material in comparative example 2, remaining and embodiment
3 is consistent.
Comparative example 3
Comparative example 3 and the difference of embodiment 3 are: micro- without polyacrylate dispersion and hollow glass in the raw material in comparative example 3
Pearl, remaining is consistent with embodiment 3.
Comparative example 4
Comparative example 4 and the difference of embodiment 3 are: polyacrylate dispersion and hollow glass micropearl in the raw material in comparative example 4
Weight be 4, remaining is consistent with embodiment 3.
Comparative example 5
Comparative example 5 and the difference of embodiment 3 are: polyacrylate dispersion and hollow glass micropearl in the raw material in comparative example 5
Weight be 9, remaining is consistent with embodiment 3.
Comparative example 6
Comparative example 6 and the difference of embodiment 3 are: mixture C in comparative example 6 it is obtained during, hollow glass micropearl one
Secondary property is all added, and stirs 3min with the speed of 66r/min, obtains mixture C, remaining is consistent with embodiment 3.
Comparative example 7
Comparative example 7 and the difference of comparative example 6 are: mixture C in comparative example 7 it is obtained during, hollow glass micropearl one
After secondary property is all added, 3min is stirred with the speed of 100r/min, obtains mixture C, remaining is consistent with embodiment 3.
Control group application publication number is efficiently to prevent made from embodiment 2 in the application for a patent for invention of 107365139 A of CN
Water is modified cement.
The additive amount of each raw material component of the water-repellent modified cement of comparative example 1-7, shown in table 2 specific as follows.
The additive amount of each raw material component of water-repellent modified cement is prepared in 2 comparative example 1-7 of table
Performance detection
According to the examination criteria and detection method of JC/T984-2011, embodiment 1-9, comparative example 1-7 and control group are changed
Property cement carry out performance measurement, specific testing result is shown in Table respectively shown in 3 and table 4.
The performance test results of the water-repellent modified cement prepared in 3 embodiment 1-9 of table
Shown by the testing result in table 3 using water-repellent modified cement made from formula and preparation method of the invention, 28d's
Impermeability pressure is up to 2.2Mpa, and compression strength is up to 54.0Mpa, and water absorption rate is minimum to be down to 2.8%, in addition, when condensation
Between, adhesion strength, frost resistance, shrinking percentage also reach the II type index in examination criteria, reached excellent performance.
The performance test results of 4 comparative example 1-7 of table and the water-repellent modified cement in control group
Show that the properties of water-repellent modified cement prepared by the present invention are superior to control group patent by the testing result in table 4
In the modified cement of high-effective water-proof performance.Formula and preparation method of the invention has the anti-permeability performance of water-repellent modified cement
Large effect.By comparative example 1-5 it is found that the polyacrylate dispersion in the present invention and hollow glass micropearl are to of the invention
The anti-permeability performance of water-repellent modified cement, compression strength have a very big impact, if removing hollow glass micropearl (comparative example 1),
The impermeability pressure of the 28d of modified cement is reduced to 1.4Mpa, and compression strength is reduced to I type, 21Mpa by II type, and water absorption rate rises to
4.9%, impervious waterproof performance is greatly reduced, and intensity also declines；If removing polyacrylate dispersion (comparative example 2) pressure resistance
Degree, impermeability pressure, setting time, adhesion strength, frost resistance, water absorption rate, shrinking percentage effect reduce；If removing polyacrylic acid
Ester lotion and hollow glass micropearl (comparative example 3), the then impermeability pressure for being modified the 28d of cement are reduced to 1.0Mpa, compression strength
I type, 15Mpa are reduced to by II type, water absorption rate rises to 5.3%, and impervious waterproof performance decline is serious, and other performances also under
Drop is obvious；By comparative example 4 and comparative example 5 it is found that in the present invention polyacrylate dispersion and hollow glass micropearl proportion, to most
The waterproof impervious characteristic tool of the modification cement obtained eventually has a certain impact, if not within the scope of the present invention, impermeability pressure resists
Compressive Strength, water absorption rate and shrinking percentage are reduced to I type by II type.By comparative example 6 and comparative example 7 the result shows that, it is of the invention
In preparation method, the time and mixing speed that hollow glass micropearl is added, which play a role to hollow glass micropearl, plays crucial work
With if hollow glass micropearl is disposably all added, it is uneven to will lead to hollow glass micropearl dispersion, influences final modification
The performance of cement；If mixing speed is too fast after being added, hollow glass micropearl structural intergrity can be destroyed, reduces it to modified water
The support strength of mud, to reduce the performances such as the compression strength of modified cement.
Above-mentioned specific embodiment is only explanation of the invention, is not limitation of the present invention, art technology
Personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in scope of the presently claimed invention.
Claims (9)
1. a kind of water-repellent modified cement, which is characterized in that the raw material including following parts by weight: 60-100 parts of lime stone, flyash
5-15 parts, 5-10 parts of montmorillonite, 3-8 parts of diatomite, 20-45 parts of quartz sand, 3-8 parts of water-reducing agent, 3-6 parts of dispersing agent, polypropylene
30-50 parts of acid esters lotion, 5-10 parts of hollow glass micropearl and 60-150 parts of water, the polyacrylate dispersion and hollow glass are micro-
The weight of pearl is 5-8.
2. water-repellent modified cement according to claim 1, which is characterized in that the raw material including following parts by weight: lime stone
70-90 parts, 8-12 parts of flyash, 5-8 parts of montmorillonite, 3-5 parts of diatomite, 25-40 parts of quartz sand, 3-5 parts of water-reducing agent, dispersing agent
3-5 parts, 30-40 parts of polyacrylate dispersion, 5-8 parts of hollow glass micropearl and 70-100 parts of water, the polyacrylate dispersion
Weight with hollow glass micropearl is 6-8.
3. water-repellent modified cement according to claim 1, it is characterised in that: the partial size of the diatomite is 900-1000
Mesh is calcined at 950 DEG C and is made.
4. water-repellent modified cement according to claim 1, it is characterised in that: the partial size of the lime stone and quartz sand is
220-250 mesh.
5. water-repellent modified cement according to claim 1, it is characterised in that: the water-reducing agent subtracts for polycarboxylic acid series high-performance
Aqua.
6. water-repellent modified cement according to claim 1, it is characterised in that: the dispersing agent is vinyl stearic bicine diester
Amine.
7. a kind of preparation method of water-repellent modified cement described in any one of claims 1-6, which is characterized in that including grasping as follows
Make step:
Lime stone, flyash and montmorillonite are added to the water of 1/3 water inventory, mixing obtains mixture A；
Diatomite, quartz sand and water-reducing agent are added to the water of 1/3 water inventory, mixing obtains mixture B；
The water of polyacrylate dispersion and surplus is uniformly mixed, hollow glass micropearl is added in three times, it is total that 1/2 is added for the first time
The hollow glass of 1/4 total amount is added in the hollow glass micropearl of amount, the hollow glass micropearl of second of 1/4 total amount of addition, third time
Microballon is added after hollow glass micropearl every time and stirs 3-5min with the speed of 50-80r/min, obtains mixture C；
Dispersing agent, mixture A, mixture B are added in mixture C, 5-10min is stirred with the speed of 50-80r/min, is obtained
Water-repellent modified cement.
8. preparation method according to claim 7, it is characterised in that: in the preparation process of the mixture A, in 300-
The speed of 500 r/min carries out ball milling after being stirred 15-25min, and mixture A is obtained after ball milling 10-20min.
9. preparation method according to claim 7, it is characterised in that: in the preparation process of the mixture B, in 300-
The speed of 500 r/min carries out ball milling after being stirred 10-20min, and mixture B is obtained after ball milling 10-15min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111187054A (en) * | 2020-03-25 | 2020-05-22 | 安徽虹达道路桥梁工程有限公司 | Pavement concrete for municipal building engineering |
| CN114804781A (en) * | 2022-05-25 | 2022-07-29 | 惠州市三环构件有限公司 | Durable PHC tubular pile concrete and PHC tubular pile |
| CN115010430A (en) * | 2022-05-31 | 2022-09-06 | 琼海鑫海混凝土有限公司 | Water-based concrete with improved durability and preparation method thereof |
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| CN103467039A (en) * | 2013-08-30 | 2013-12-25 | 句容联众科技开发有限公司 | Cement-base waterproof coating and preparation method thereof |
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| CN101891429A (en) * | 2010-06-28 | 2010-11-24 | 上海衡峰氟碳材料有限公司 | Ceramic imitation cement component, ceramic imitation cement product and preparation method thereof |
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| CN111187054B (en) * | 2020-03-25 | 2022-01-07 | 安徽虹达道路桥梁工程有限公司 | Pavement concrete for municipal building engineering |
| CN114804781A (en) * | 2022-05-25 | 2022-07-29 | 惠州市三环构件有限公司 | Durable PHC tubular pile concrete and PHC tubular pile |
| CN114804781B (en) * | 2022-05-25 | 2023-02-03 | 惠州市三环构件有限公司 | Durable PHC tubular pile concrete and PHC tubular pile |
| CN115010430A (en) * | 2022-05-31 | 2022-09-06 | 琼海鑫海混凝土有限公司 | Water-based concrete with improved durability and preparation method thereof |
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| CN109455979B (en) | 2021-07-13 |
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