CN109336505A - One kind is freeze proof to split mortar and preparation method thereof - Google Patents
One kind is freeze proof to split mortar and preparation method thereof Download PDFInfo
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- CN109336505A CN109336505A CN201811283186.0A CN201811283186A CN109336505A CN 109336505 A CN109336505 A CN 109336505A CN 201811283186 A CN201811283186 A CN 201811283186A CN 109336505 A CN109336505 A CN 109336505A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- 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
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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
- 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
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Abstract
The invention belongs to building material technical fields, it discloses and a kind of freeze proof splits mortar and preparation method thereof, by weight, raw material includes: modified cement 30-50 powder, 1.0-2.5 parts of antifreezing agent, thick 25-35 parts of yellow ground, thin 15-25 parts of yellow ground, 3-7 parts of anti-crack fiber, 1-2 parts of methylcellulose, 10-20 parts of nano silica, 25-45 parts of diatomite, 12-20 parts of flyash, 2-3 parts of lignin, after above-mentioned raw materials are mixed, it is stirred with 800-1000r/min, 50-70 DEG C of mixing temperature, constantly add water in mixed process, control mixing water content of matter is maintained at 40%, stirring 1-3h is obtained, it is of the invention freeze proof to split mortar, can be kept at subzero 20 DEG C to subzero 10 DEG C of environment higher adhesive property with, tension , compression strength, have good stability, be suitable for cold low temp area, while also disclosing this freeze proof preparation method for splitting mortar.
Description
Technical field
The invention belongs to building material technical field, more particularly to a kind of freeze proof split mortar and preparation method thereof.
Background technique
It is mixed and stirred in proportion with inorganic coagulation material and the good water of fine aggregate, also referred to as mortar.For build and plastering engineering,
Masonry mortar and decorative mortar can be divided into, the former installs the masonry and component for brick, stone, building block etc.；The latter is then used for
The plastering on the surfaces such as metope, ground, roofing and beam column construction, to reach the requirement such as protection and decoration.In ordinary mortar material also
Having plenty of gypsum, lime paste or clay adding of fiber reinforcing material adds water to be configured to paste, referred to as ash, cream, mud or clay.
There are commonly the hemp-fibred plaster lime paste of hemp cut (incorporation), paper strip mixed lime mortar (lime paste of incorporation paper muscle), gypsum dusts (to mix in the plaster of paris
Enter lime paste and paper muscle or glass fibre etc.) and mix plaster (a small amount of lime and wheat straw or straw are mixed in clay).As the modern times build
The raising of requirement and the progress of scientific research technology are built, mortar group constituent class and purposes also increasingly refine.In cold low temp area,
Using the dry-mixed mortar that ordinary cement is prepared as sizing material, adhesion strength is low, and the disadvantage of impermeability, crack resistance and frost resistance difference etc. makes
Shorter with the service life, repeatedly construction easily causes waste, and polymer cement mortar is the group using organic polymer as cement mortar
It being prepared at material, the addition of polymer substantially increases the performance of cement mortar, compared with common cement mortar, tool
There are lesser elasticity modulus, stronger mechanical property and excellent freeze proof, anti-permeability performance, resist chemical etc., application
Field gradually covers the application category of traditional cement mortar.
Summary of the invention
Goal of the invention of the invention be to provide it is a kind of can be used in low-temperature cold area, excellent antifreeze of property retention
Mortar is combined by using specified raw material, cooperates corresponding production technology, obtains antifreeze mortar, with deicing characteristics,
It is adapted to low temp area use.
In order to achieve the above-mentioned object of the invention, The technical solution adopted by the invention is as follows:
One kind is freeze proof to split mortar, by weight, is made of following raw material: modified cement 30-50 powder, antifreezing agent 1.0-
2.5 parts, yellow ground 25-35 parts thick, yellow ground 15-25 parts thin, 3-7 parts of anti-crack fiber, 1-2 parts of methylcellulose, nano silica
10-20 parts, 25-45 parts of diatomite, 12-20 parts of flyash, 2-3 parts of lignin.
Further, it is described it is freeze proof split mortar, by weight, be made of following raw material: modified 40 powder of cement, antifreeze
1.75 parts of agent, 30 parts of thick yellow ground, 20 parts of thin yellow ground, 5 parts of anti-crack fiber, 1.5 parts of methylcellulose, 15 parts of nano silica,
35 parts of diatomite, 16 parts of flyash, 2.5 parts of lignin.
Further, the antifreezing agent, by calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic acid anhydride
Polycarboxylate water-reducer composition, wherein calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylic acids diminishing
The mass ratio of agent is 2-4:1.5-3.5:1-3:2-5.
Further, the antifreezing agent the preparation method comprises the following steps: weighing calcium nitrite, Nonyl pheno in mass ratio
Ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer simultaneously uniformly mix, and are put into ball mill, add 5-8 parts of ethyl alcohol, grind 10-
20 minutes, control partial size crossed 100-130 mesh, and 30-50 parts of deionized waters are added in powder after sieving, was warming up to low at 60-80 DEG C
Speed stirring 3-5min, standing are cooled to room temperature, filter, and remove filtrate, 50-70 parts of deionized waters and 0.6-1.0 parts are added again
Dodecyl sodium sulfate, the ultrasonic disperse 10-15min under the power of 100-120W add centrifuge centrifugation 4-8min, filtering
Afterwards by filtrate in 80-100 DEG C of hot-air seasoning to get.
Further, the modification cement, is prepared by following methods: by 25-50 parts of ordinary portland cements,
Rubber powder mixing can be dispersed in 5-7 parts of modified methyl butadiene-styrene rubber lotions and 20-30 parts of fluoropolymer resins, adds 40-50 parts of water, is warming up to 70
± 5 DEG C, lignin is poured into, 60-80min is stirred with 600-800r/min, mixes ripe, insulation film is covered in surface of material, with 60 ± 5
DEG C ageing 20-30h, obtain modified cement.
Further, mixture of the anti-crack fiber for long fibre and staple fiber, long fiber length 50-80mm,
Staple length 20-30mm, wherein long fibre and the mass ratio of staple fiber are 2.6-4.2:1.2-2.4.
More further, the fluoropolymer resin can be dispersed rubber powder the preparation method comprises the following steps: 40-60 DEG C of temperature, nitrogen
Under atmospheric condition, by 6-10 parts of Lauxites, 4-7 parts of vinyl sulfonic acids, 3-5 parts of N hydroxymethyl acrylamides and 1-2 parts of acetic acid
Vinyl acetate mixing, is continuously added dropwise the 40% fine solution of concentration azo isobutyl of 0.3-0.5 part with the speed of 5S/ drop, is added dropwise
1h is reacted again, 5-7 parts of precipitated calcium carbonate powder, 1-3 parts of polyvinyl alcohol are added into lotion, and ultrasound mixes and is placed on -20 DEG C -- 10
Be freeze-dried 40-60min at DEG C, grinding be broken into powder to get.
More further, it is described it is freeze proof split mortar the preparation method comprises the following steps:
(1) each component, evenly dispersed placement are weighed by weight；
(2) in a nitrogen atmosphere, nano silica is heated to molten state, poured on anti-crack fiber surface, to cracking resistance fibre
After dimension table face is totally submerged, diatomite is added, mechanical stirring 20-40min obtains modified fibre；
(3) modified cement, modified fibre, antifreezing agent and surplus material are mixed, 800-1000r/min stirring, mixing temperature
It spends 50-70 DEG C, water is constantly added in mixed process, control mixing water content of matter is maintained at 40%, and stirring 1-3h to obtain the final product.
By adopting the above-described technical solution, the beneficial effects of the present invention are:
(1) present invention uses combined antifreezing agent, uses at low ambient temperatures, and calcium nitrite molecular weight is small, dissolves with water
Degree is high, after ethylene glycol mixing, easily infiltrates through inside mortar, when temperature is down to freezing point, free water starts in mortar hole
It freezes, calcium nitrite makes its concentration become larger (freezing point further decreases), work as temperature from being precipitated and being dissolved in residual ionization water in ice body
Degree continues to decline, then continues this process, until the minimum plait point of calcium nitrite occurs so that whole free waters are all tied in hole
Cheng Bing makes hydration reaction continue to carry out its role is to keep having certain liquid phase water in mortar always；Ethylene glycol is dissolved in sand
Free water in slurry occupies and belongs to originally in a part on hydrone surface, reduce the sub- content of surface moisture, and contains two in ethylene glycol
Hydroxyl can form hydrogen bond with hydrone, can also lock partial moisture, make its saturated vapor drops, and freezing point reduces；Nonyl phenol
Polyoxyethylene ether plays air-entraining effect, in forming a large amount of micro-bubbles in mortar, mortar interconnecting hole road is blocked, when mitigating frost heave
Crack propagation, absorbs the frost heave stress of mortar, and maleic anhydride class polycarboxylate water-reducer can effectively reduce containing for free water in mortar
Amount is reduced into ice rate, and by the peptizaiton of water-reducing agent, release package water eliminates bubble inferior, makes already existing big
Grain ice crystal is converted into tiny ice crystal, is broken to ice environment；By the synergistic effect of each component, mortar freezing point is effectively reduced, improves
Mortar freezing-thawing resistance, so that the antifreeze mortar still has preferable deicing characteristics, mechanical property retentivity at low ambient temperatures
It is excellent.
(2) rubber powder and modified methyl butadiene-styrene rubber can be dispersed by using fluoropolymer resin in antifreeze mortar prepared by the present invention
Lotion is modified cement, and portland cement corrosion resistance is strong, and the heat of hydration is good, but frost resistance and wearability are poor, and rubber powder
Cement flexibility and ductility can be improved in had acrylic acid series long-chain, can bear higher frost heave stress, modified first
Base butadiene-styrene rubber lotion mixes in cement, keeps cement slurry fine and close, and micro-pore rate increases, and cement base forms discontinuous space knot
Structure, latex interweaves therewith reticulates glue film, improves cement matrix intensity, and the two collective effect enhances cement mortar in low temperature ring
Anti-cracking performance under border, and antifreeze with the rubber powder favorable dispersibility in the polymer water slurry body of same phase, can be further
Improve the mechanical strength of mortar；Modified cement and combined antifreezing agent and anti-crack fiber generate synergistic effect, promote the freeze proof sand
Slurry keeps excellent stability at low temperature.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Embodiment is closed, the present invention is further explained.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Embodiment 1
It is a kind of it is freeze proof splits mortar, by weight, comprising: modified 30 powder of cement, 1.0 parts of antifreezing agent, 25 parts of thick yellow ground, thin
15 parts of yellow ground, 3 parts of anti-crack fiber, 1 part of methylcellulose, 10 parts of nano silica, 25 parts of diatomite, 12 parts of flyash, wood
2 parts of quality.
Antifreezing agent is made of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer,
Wherein, the mass ratio of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer is 2:1.5:
1:2。
Anti-crack fiber is the mixture of long fibre and staple fiber, long fiber length 50mm, staple length 20mm, wherein
Long fibre and the mass ratio of staple fiber are 2.6:1.2.
It is freeze proof split mortar the preparation method comprises the following steps:
(1) calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylic acids diminishing are weighed in mass ratio
Agent simultaneously uniformly mixes, and is put into ball mill, adds 5 parts of ethyl alcohol, grinds 10 minutes, and control partial size sieves with 100 mesh sieve, and powder adds after sieving
Enter 30 parts of deionized waters, be warming up at 60 DEG C and stir at low speed 5min, standing is cooled to room temperature, and filtering removes filtrate, is added again
50 parts of deionized waters and 0.6 part of dodecyl sodium sulfate, the ultrasonic disperse 15min under the power of 100W, add centrifuge from
Heart 4min, after filtering by filtrate in 80 DEG C of hot-air seasonings to get combined antifreezing agent；
(2) glue is can be dispersed into 25 parts of ordinary portland cements, 5 parts of modified methyl butadiene-styrene rubber lotions and 20 parts of fluoropolymer resins
Powder mixing, adds 40 parts of water, is warming up to 65 DEG C, pours into lignin, stirs 80min with 600r/min, mixes ripe, be covered in surface of material
Insulation film obtains modified cement with 55 DEG C of ageing 30h；
(3) under the conditions of 40 DEG C of temperature, nitrogen atmosphere, by 6 parts of Lauxites, 4 parts of vinyl sulfonic acids, 3 parts of N- methylols third
Acrylamide and 1 part of vinylacetate mixing, it is fine molten to be continuously added dropwise 0.3 part of 40% concentration azo isobutyl with the speed of 5S/ drop
Liquid is added dropwise and reacts 1h again, and 5 parts of precipitated calcium carbonate powder, 1 part of polyvinyl alcohol are added into lotion, and ultrasound mixes and is placed on -10
40min is freeze-dried at DEG C, grinding is broken into powder and rubber powder can be dispersed to get fluoropolymer resin；
(4) in a nitrogen atmosphere, nano silica is heated to molten state, poured on anti-crack fiber surface, to cracking resistance fibre
After dimension table face is totally submerged, be added diatomite, be put into grinder, grind 2min, control 24 μm of partial size, add 50ml go from
Sub- water and 5 parts of dehydrated alcohols, centrifugation, filtering, filtrate obtain modified fibre through 1.8 μm of infra-red drying 30min；
(5) each component is weighed by weight, and the dry 5h in 40 DEG C of hot winds, is placed in cold at shady and cool ventilation after mixing
But, it is collected when the material inside and outside temperature difference is at ± 5 DEG C；
(6) modified cement, modified fibre, antifreezing agent and surplus material are mixed, 800r/min stirring, mixing temperature 50
DEG C, water is constantly added in mixed process, control mixing water content of matter is maintained at 40%, and stirring 3h to obtain the final product.
Embodiment 2
It is a kind of it is freeze proof splits mortar, by weight, comprising: modified 35 powder of cement, 1.35 parts of antifreezing agent, 27 parts of thick yellow ground,
Thin 18 parts of yellow ground, 4 parts of anti-crack fiber, 1.25 parts of methylcellulose, 13 parts of nano silica, 30 parts of diatomite, flyash 14
Part, 2.2 parts of lignin.
Antifreezing agent is made of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer,
Wherein, the mass ratio of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer is 2.5:
2.0:1.5:2.8。
Anti-crack fiber is the mixture of long fibre and staple fiber, long fiber length 57mm, staple length 22mm, wherein
Long fibre and the mass ratio of staple fiber are 3.0:1.5.
It is freeze proof split mortar the preparation method comprises the following steps:
(1) subtract by weighing calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylic acids in mass ratio
Aqua simultaneously uniformly mixes, and is put into ball mill, adds 5.7 parts of ethyl alcohol, grinds 13 minutes, and control partial size sieves with 100 mesh sieve, powder after sieving
35 parts of deionized waters are added in material, are warming up at 65 DEG C and stir at low speed 4.5min, and standing is cooled to room temperature, filtering, remove filtrate, then
55 parts of deionized waters of secondary addition and 0.7 part of dodecyl sodium sulfate, ultrasonic disperse 13.7min, adds under the power of 105W
Centrifuge be centrifuged 7min, after filtering by filtrate in 85 DEG C of hot-air seasonings to get combined antifreezing agent；
(2) 31.5 parts of ordinary portland cements, 5.5 parts of modified methyl butadiene-styrene rubber lotions and 22 parts of fluoropolymer resins can be divided
Dissipate rubber powder mixing, add 42 parts of water, be warming up to 67 DEG C, pour into lignin, with 650r/min stir 65min, mix it is ripe, in surface of material
It is covered with insulation film, with 58 DEG C of ageing 27h, obtains modified cement；
(3) under the conditions of temperature 45 C, nitrogen atmosphere, by 7 parts of Lauxites, 4.7 parts of vinyl sulfonic acids, 3.5 parts of N- hydroxyl first
Base acrylamide and 1.2 parts of vinylacetate mixing, it is different to be continuously added dropwise 0.35 part of 40% concentration azo with the speed of 5S/ drop
The fine solution of fourth, is added dropwise and reacts 1h again, and 5.5 parts of precipitated calcium carbonate powder, 1.5 parts of polyvinyl alcohol are added into lotion, and ultrasound is mixed
Even be placed at -12 DEG C is freeze-dried 45min, 45 DEG C of degree of being broken into of grinding, under the conditions of nitrogen atmosphere, by 7 parts of Lauxites,
4.7 parts of vinyl sulfonic acids, 3.5 parts of N hydroxymethyl acrylamides and 1.2 parts of vinylacetate mixing, with powder to get polymer tree
Rubber powder can be dispersed in rouge；
(4) in a nitrogen atmosphere, nano silica is heated to molten state, poured on anti-crack fiber surface, to cracking resistance fibre
After dimension table face is totally submerged, diatomite is added, is put into grinder, grind 25min, controls 22.5 μm of partial size, add 55ml
Deionized water and 5.5 parts of dehydrated alcohols, centrifugation, filtering, filtrate obtain modified fibre through 2.1 μm of infra-red drying 35min；
(5) each component is weighed by weight, and the dry 4.5h in 45 DEG C of hot winds, is placed at shady and cool ventilation after mixing
It is cooling, it is collected when the material inside and outside temperature difference is at ± 5 DEG C；
(6) modified cement, modified fibre, antifreezing agent and surplus material are mixed, 850r/min stirring, mixing temperature 55
DEG C, water is constantly added in mixed process, control mixing water content of matter is maintained at 40%, and stirring 2.7h to obtain the final product.
Embodiment 3
It is a kind of it is freeze proof splits mortar, by weight, comprising: modified 40 powder of cement, 1.75 parts of antifreezing agent, 30 parts of thick yellow ground,
Thin 20 parts of yellow ground, 5 parts of anti-crack fiber, 1.5 parts of methylcellulose, 15 parts of nano silica, 35 parts of diatomite, flyash 16
Part, 2.5 parts of lignin.
Antifreezing agent is made of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer,
Wherein, the mass ratio of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer is 3:2.5:
2:3.5。
Anti-crack fiber is the mixture of long fibre and staple fiber, long fiber length 65mm, staple length 25m, wherein long
Fiber and the mass ratio of staple fiber are 2.6:1.2.
It is freeze proof split mortar the preparation method comprises the following steps:
(1) subtract by weighing calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylic acids in mass ratio
Aqua simultaneously uniformly mixes, and is put into ball mill, adds 6.5 parts of ethyl alcohol, grinds 15 minutes, and control partial size crosses 115 meshes, powder after sieving
40 parts of deionized waters are added in material, are warming up at 60-80 DEG C and stir at low speed 4min, and standing is cooled to room temperature, and filtering removes filtrate,
60 parts of deionized waters of addition and 0.8 part of dodecyl sodium sulfate again, the ultrasonic disperse 12.5min under the power of 110W, then plus
Enter centrifuge centrifugation 6min, after filtering by filtrate in 90 DEG C of hot-air seasonings to get combined antifreezing agent；
(2) 37.5 parts of ordinary portland cements, 6 parts of modified methyl butadiene-styrene rubber lotions and 25 parts of fluoropolymer resins can be dispersed
Rubber powder mixing, adds 45 parts of water, is warming up to 70 DEG C, pours into lignin, stirs 70min with 700r/min, mixes ripe, cover in surface of material
Upper insulation film obtains modified cement with 60 DEG C of ageing 25h；
(3) under the conditions of temperature 50 C, nitrogen atmosphere, by 8 parts of Lauxites, 5.5 parts of vinyl sulfonic acids, 4 parts of N- methylols
Acrylamide and 1.5 parts of vinylacetate mixing, are continuously added dropwise 0.4 part of 40% concentration azo isobutyl with the speed of 5S/ drop
Fine solution, is added dropwise and reacts 1h again, and 6 parts of precipitated calcium carbonate powder, 2 parts of polyvinyl alcohol are added into lotion, and ultrasound mixes postposition
50min is freeze-dried at -15 DEG C, grinding is broken to can be dispersed rubber powder to get fluoropolymer resin；
(4) in a nitrogen atmosphere, nano silica is heated to molten state, poured on anti-crack fiber surface, to cracking resistance fibre
After dimension table face is totally submerged, diatomite is added, is put into grinder, grind 30min, controls 21 μm of partial size, add 60ml and go
Ionized water and 6 parts of dehydrated alcohols, centrifugation, filtering, filtrate obtain modified fibre through 2.4 μm of infra-red drying 40min；
(5) each component is weighed by weight, and the dry 4h in 50 DEG C of hot winds, is placed in cold at shady and cool ventilation after mixing
But, it is collected when the material inside and outside temperature difference is at ± 5 DEG C；
(6) modified cement, modified fibre, antifreezing agent and surplus material are mixed, 900r/min stirring, mixing temperature 60
DEG C, water is constantly added in mixed process, control mixing water content of matter is maintained at 40%, and stirring 2h to obtain the final product.
Embodiment 4
It is a kind of it is freeze proof splits mortar, by weight, comprising: modified 45 powder of cement, 2.1 parts of antifreezing agent, 33 parts of thick yellow ground, thin
22 parts of yellow ground, 6 parts of anti-crack fiber, 1.7 parts of methylcellulose, 18 parts of nano silica, 40 parts of diatomite, 18 parts of flyash,
2.8 parts of lignin.
Antifreezing agent is made of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer,
Wherein, the mass ratio of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer is 3.5:
3.0:2.5:4.2。
Anti-crack fiber is the mixture of long fibre and staple fiber, long fiber length 73mm, staple length 28mm, wherein
Long fibre and the mass ratio of staple fiber are 3.8:2.1.
It is freeze proof split mortar the preparation method comprises the following steps:
(1) subtract by weighing calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylic acids in mass ratio
Aqua simultaneously uniformly mixes, and is put into ball mill, adds 7.2 parts of ethyl alcohol, grinds 17 minutes, and control partial size crosses 130 meshes, powder after sieving
45 parts of deionized waters are added in material, are warming up at 75 DEG C and stir at low speed 3.5min, and standing is cooled to room temperature, filtering, remove filtrate, then
65 parts of deionized waters of secondary addition and 0.9 part of dodecyl sodium sulfate, ultrasonic disperse 11.3min, adds under the power of 115W
Centrifuge be centrifuged 5min, after filtering by filtrate in 95 DEG C of hot-air seasonings to get combined antifreezing agent；
(2) 42.5 parts of ordinary portland cements, 6.5 parts of modified methyl butadiene-styrene rubber lotions and 27 parts of fluoropolymer resins can be divided
Dissipate rubber powder mixing, add 48 parts of water, be warming up to 73 DEG C, pour into lignin, with 750r/min stir 65min, mix it is ripe, in surface of material
It is covered with insulation film, with 63 DEG C of ageing 22h, obtains modified cement；
(3) under the conditions of 55 DEG C of temperature, nitrogen atmosphere, by 9 parts of Lauxites, 6.2 parts of vinyl sulfonic acids, 4.5 parts of N- hydroxyl first
Base acrylamide and 1.7 parts of vinylacetate mixing, it is different to be continuously added dropwise 0.45 part of 40% concentration azo with the speed of 5S/ drop
The fine solution of fourth, is added dropwise and reacts 1h again, and 6.5 parts of precipitated calcium carbonate powder, 2.5 parts of polyvinyl alcohol are added into lotion, and ultrasound is mixed
Even be placed at -18 DEG C is freeze-dried 55min, and grinding is broken into powder and rubber powder can be dispersed to get fluoropolymer resin；
(4) in a nitrogen atmosphere, nano silica is heated to molten state, poured on anti-crack fiber surface, to cracking resistance fibre
After dimension table face is totally submerged, diatomite is added, is put into grinder, grind 35min, controls 19.5 μm of partial size, add 65ml
Deionized water and 6.5 parts of dehydrated alcohols, centrifugation, filtering, filtrate obtain modified fibre through 2.7 μm of infra-red drying 45min；
(5) each component is weighed by weight, and the dry 3.5h in 55 DEG C of hot winds, is placed at shady and cool ventilation after mixing
It is cooling, it is collected when the material inside and outside temperature difference is at ± 5 DEG C；
(6) modified cement, modified fibre, antifreezing agent and surplus material are mixed, 950r/min stirring, mixing temperature 65
DEG C, water is constantly added in mixed process, control mixing water content of matter is maintained at 40%, and stirring 1.2h to obtain the final product.
Embodiment 5
It is a kind of it is freeze proof splits mortar, by weight, comprising: modified 50 powder of cement, 2.5 parts of antifreezing agent, 35 parts of thick yellow ground, thin
25 parts of yellow ground, 7 parts of anti-crack fiber, 2 parts of methylcellulose, 20 parts of nano silica, 45 parts of diatomite, 20 parts of flyash, wood
3 parts of quality.
Antifreezing agent is made of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer,
Wherein, the mass ratio of calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer is 4:3.5:
3:5。
Anti-crack fiber is the mixture of long fibre and staple fiber, long fiber length 80mm, staple length 30mm, wherein
Long fibre and the mass ratio of staple fiber are 3.4:2.4.
It is freeze proof split mortar the preparation method comprises the following steps:
(1) subtract by weighing calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylic acids in mass ratio
Aqua simultaneously uniformly mixes, and is put into ball mill, adds 8 parts of ethyl alcohol, grinds 20 minutes, and control partial size crosses 130 meshes, powder after sieving
50 parts of deionized waters are added, is warming up at 80 DEG C and stirs at low speed 3min, standing is cooled to room temperature, filtering, remove filtrate, again plus
Enter 70 parts of deionized waters and 1.0 parts of dodecyl sodium sulfates, ultrasonic disperse 10min, adds centrifuge under the power of 120W
Be centrifuged 4min, after filtering by filtrate in 100 DEG C of hot-air seasonings to get combined antifreezing agent；
(2) glue is can be dispersed into 50 parts of ordinary portland cements, 7 parts of modified methyl butadiene-styrene rubber lotions and 30 parts of fluoropolymer resins
Powder mixing, adds 50 parts of water, is warming up to 75 DEG C, pours into lignin, stirs 60min with 800r/min, mixes ripe, be covered in surface of material
Insulation film obtains modified cement with 65 DEG C of ageing 20h；
(3) under the conditions of temperature 60 C, nitrogen atmosphere, by 10 parts of Lauxites, 7 parts of vinyl sulfonic acids, 5 parts of N- methylols third
Acrylamide and 2 parts of vinylacetate mixing, it is fine molten to be continuously added dropwise 0.5 part of 40% concentration azo isobutyl with the speed of 5S/ drop
Liquid is added dropwise and reacts 1h again, and 7 parts of precipitated calcium carbonate powder, 3 parts of polyvinyl alcohol are added into lotion, and ultrasound mixes and is placed on -20
60min is freeze-dried at DEG C, grinding is broken into powder and rubber powder can be dispersed to get fluoropolymer resin；
(4) in a nitrogen atmosphere, nano silica is heated to molten state, poured on anti-crack fiber surface, to cracking resistance fibre
After dimension table face is totally submerged, diatomite is added, is put into grinder, grind 40min, controls 18 μm of partial size, add 50-70ml
Deionized water and 7 parts of dehydrated alcohols, centrifugation, filtering, filtrate obtain modified fibre through 1.8 μm of infra-red drying 50min；
(5) each component is weighed by weight, and the dry 3h in 60 DEG C of hot winds, is placed in cold at shady and cool ventilation after mixing
But, it is collected when the material inside and outside temperature difference is at ± 5 DEG C；
(6) modified cement, modified fibre, antifreezing agent and surplus material are mixed, 1000r/min stirring, mixing temperature 70
DEG C, water is constantly added in mixed process, control mixing water content of matter is maintained at 40%, and stirring 1h to obtain the final product
Mortar module, specification 160mm*40mm*40mm are prepared according to DL/T5126-2001 standard.
And according to JC/T984-2011 Polymer cement materials, DL/T5126-2001 polymer-modified cement mortar
The requirement of testing regulations carries out the test of compression strength, tensile strength, flexural strength etc. to corresponding mortar module.
Wherein, freeze-thaw stability is with the mass loss rate after mortar module 30 frozen process experiments of progress, anti-permeability strength intensity damage
Mistake rate is testing standard.
And it is arranged:
Comparative example 1: essentially identical with the technical solution of embodiment 1, difference is in the freeze proof preparation step (1) for splitting mortar
Do not add antifreeze；
Comparative example 2: essentially identical with the technical solution of embodiment 1, difference is in the freeze proof preparation step (1) for splitting mortar
Use calcium nitrite as antifreezing agent；
Comparative example 3: essentially identical with the technical solution of embodiment 1, difference is in the freeze proof preparation step (1) for splitting mortar
Use ethylene glycol as antifreezing agent；
Comparative example 4: essentially identical with the technical solution of embodiment 1, difference is in the freeze proof preparation step (1) for splitting mortar
Calcium nitrite and ethylene glycol are simply mixed and obtained as antifreezing agent；
Comparative example 5: essentially identical with the technical solution of embodiment 1, difference is in the freeze proof preparation step (3) for splitting mortar
Modified cement is substituted for ordinary portland cement；
Comparative example 6: essentially identical with the technical solution of embodiment 1, difference is in the freeze proof preparation step (3) for splitting mortar
Ordinary portland cement is used only modified methyl butadiene-styrene rubber lotion and is modified；
Comparative example 7: essentially identical with the technical solution of embodiment 1, difference is that the preparation step (3) of cracking resistance jelly mortar is general
Logical portland cement is used only the dispersible rubber powder of fluoropolymer resin and is modified；
Comparative example 8: it is essentially identical with the technical solution of embodiment 1, difference be in the freeze proof preparation step for splitting mortar not
Add anti-crack fiber；
Comparative example 9: essentially identical with the technical solution of embodiment 1, difference is in the freeze proof preparation step (4) for splitting mortar
Anti-crack fiber is not modified；
Comparative example 10: commercially available heat-preserving anti-freezing mortar.
Test result is recorded in following table:
Table 1
As seen from the above table, every test data of embodiment 3 highest in embodiment 1-5, therefore embodiment 3 is of the invention
Best-of-breed technology scheme.
(1) comparative example 1 does not add antifreeze, and anti-permeability strength, frost resistance and mechanics are comprehensive, are substantially lower than embodiment 3, and
Fall is maximum in each comparative example, illustrates the antifreeze overall effect mortar performance.
(2) comparative example 2,3 all be used only calcium nitrite or ethylene glycol one pack system antifreezing agent, from test result as can be seen that
Antifreezing effect is good compared with what comparative example 1 was not added, in appearance there are still cracking, falling off, illustrates antifreezing effect existing defects.
(3) comparative example 4 has used calcium nitrite and ethylene glycol as antifreezing agent simultaneously, from test result as can be seen that strong
Degree and antifreezing effect are obviously improved than comparative example 2,3, and appearance is not present cracking, falls off, but intensity and loss late compare embodiment
1-5 illustrates while using calcium nitrite and ethylene glycol can not reach technology effect of the invention as antifreezing agent there are still gap
Fruit.
Comparative example 2 does not add antifreeze, and anti-permeability strength, frost resistance and mechanics are comprehensive, are substantially lower than embodiment 3, and
Fall is maximum in each comparative example, illustrates the antifreeze overall effect mortar performance.
(4) unmodified ordinary portland cement has been used in comparative example 5, anti-permeability strength, frost resistance and mechanical property are equal
It is low compared with embodiment 3, and cracking and dropping situations occur, compared with Example 3 compared with illustrating modified cement also to the freeze proof mortar
Performance has a major impact.
(5) comparison 6,7 all uses only a kind of modifying agent and is modified, and comparative example 4 uses modified methyl butadiene-styrene rubber lotion
Modified cement, test result show its intensity data be higher than in comparative example 5 using fluoropolymer resin can be dispersed rubber powder as a result,
There is slight cracking phenomena, show that this cement flexibility is insufficient, the every test result of comparative example 5,6 is below embodiment 3, says
The bright cement only with single modification is freeze proof to be split and strength character is insufficient.
(6) comparative example 8,9 data are not much different, and have more apparent gap in terms of frost resistance, illustrate the addition of anti-crack fiber
Freeze proof, the crack resistence performance of mortar are influenced first, and mechanical property also decreases compared to the examples, illustrates anti-crack fiber also
It can mortar lifting high strength.
(7) compared with commercially available thermal insulation mortar, 3 various aspects test data of embodiment is dominant, and illustrates of the invention freeze proof split
Mortar has a clear superiority antifreeze.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (8)
1. one kind is freeze proof to split mortar, which is characterized in that by weight, be made of following raw material: modified cement 30-50 powder is prevented
Freeze agent 1.0-2.5 parts, yellow ground 25-35 parts thick, yellow ground 15-25 parts thin, 3-7 parts of anti-crack fiber, 1-2 parts of methylcellulose, nanometer
0-20 parts of silica 1,25-45 parts of diatomite, 12-20 parts of flyash, 2-3 parts of lignin.
2. freeze proof mortar is split according to claim 1, which is characterized in that by weight, be made of following raw material: modified
40 powder of cement, 1.75 parts of antifreezing agent, 30 parts of thick yellow ground, 20 parts of thin yellow ground, 5 parts of anti-crack fiber, methylcellulose 1.5 part, nanometer
5 parts of silica 1,35 parts of diatomite, 16 parts of flyash, 2.5 parts of lignin.
3. freeze proof mortar is split according to claim 1, which is characterized in that the antifreezing agent, by calcium nitrite, nonyl phenol
Polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer are formulated, wherein calcium nitrite, polyoxyethylene nonyl phenyl second
The mass ratio of alkene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer is 2-4:1.5-3.5:1-3:2-5.
4. anticracking grout according to claim 1, which is characterized in that the antifreezing agent the preparation method comprises the following steps: press quality
Than weighing calcium nitrite, nonylphenol polyoxyethylene ether, ethylene glycol and maleic anhydride class polycarboxylate water-reducer and uniformly mixing, it is put into
In ball mill, add 5-8 parts of ethyl alcohol, grind 10-20 minutes, control partial size crosses 100-130 mesh, and 30-50 is added in powder after sieving
Part deionized water, is warming up at 60-80 DEG C and stirs at low speed 3-5min, and standing is cooled to room temperature, and filtering removes filtrate, again plus
Enter 50-70 parts of deionized waters and 0.6-1.0 parts of dodecyl sodium sulfates, the ultrasonic disperse 10- under the power of 100-120W
15min, add centrifuge centrifugation 4-8min, after filtering by filtrate in 80-100 DEG C of hot-air seasoning to get.
5. freeze proof mortar is split according to claim 1, which is characterized in that the modification cement is prepared by following methods
It obtains: 25-50 parts of ordinary portland cements, 5-7 parts of modified methyl butadiene-styrene rubber lotions and 20-30 parts of fluoropolymer resins can be dispersed
Rubber powder mixing, adds 40-50 parts of water, is warming up to 70 ± 5 DEG C, pours into lignin, stirs 60-80min with 600-800r/min, mixes
It is ripe, it is covered with insulation film in surface of material, with 60 ± 5 DEG C of ageing 20-30h, obtains modified cement.
6. freeze proof mortar is split according to claim 1, which is characterized in that the anti-crack fiber is long fibre and staple fiber
Mixture, long fiber length 50-80mm, staple length 20-30mm, wherein long fibre and the mass ratio of staple fiber are
2.6-4.2:1.2-2.4.
7. freeze proof mortar is split according to claim 5, which is characterized in that the system of rubber powder can be dispersed in the fluoropolymer resin
Preparation Method are as follows: under the conditions of 40-60 DEG C of temperature, nitrogen atmosphere, by 6-10 parts of Lauxites, 4-7 parts of vinyl sulfonic acids, 3-5 parts of N-
Hydroxymethyl acrylamide and 1-2 parts of vinylacetate mixing, are continuously added dropwise 40% concentration of 0.3-0.5 part with the speed of 5S/ drop
The fine solution of azo isobutyl, is added dropwise and reacts 1h again, and 5-7 parts of precipitated calcium carbonate powder, 1-3 parts of polyethylene are added into lotion
Alcohol, ultrasound mix and are placed on -20 DEG C -- be freeze-dried 40-60min at 10 DEG C, grinding be broken into powder to get.
8. the freeze proof preparation method for splitting mortar according to claim 1-7, which is characterized in that specifically include following
Step:
(1) each component is weighed by weight, and the dry 3-5h in 40-60 DEG C of hot wind, is placed at shady and cool ventilation after mixing
It is cooling, it is collected when the material inside and outside temperature difference is at ± 5 DEG C；
(2) in a nitrogen atmosphere, nano silica is heated to molten state, poured on anti-crack fiber surface, to anti-crack fiber table
After face is totally submerged, diatomite is added, is put into grinder, grind 20-40min, controls 18-24 μm of partial size, add 50-
70ml deionized water and 5-7 parts of dehydrated alcohols, centrifugation, filtering, filtrate must change through 1.8-3.0 μm of infra-red drying 30-50min
Property fiber；
(4) modified cement, modified fibre, antifreezing agent and surplus material are mixed, 800-1000r/min stirring, mixing temperature 50-
70 DEG C, water is constantly added in mixed process, control mixing water content of matter is maintained at 40%, and stirring 1-3h to obtain the final product.
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