CN110330274A - A kind of preparation method of high-strength dry powder mortar - Google Patents
A kind of preparation method of high-strength dry powder mortar Download PDFInfo
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- CN110330274A CN110330274A CN201910539813.0A CN201910539813A CN110330274A CN 110330274 A CN110330274 A CN 110330274A CN 201910539813 A CN201910539813 A CN 201910539813A CN 110330274 A CN110330274 A CN 110330274A
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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
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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
Abstract
The invention belongs to building material technical fields, and in particular to a kind of preparation method of high-strength dry powder mortar.The present invention mixes asbestos with sawdust, the degree of roughness that corrosion modification increases mineral fibre surface is carried out to asbestos chats fibres first with acetic acid, improve the bonding degree between fiber and other ingredients, high temperature and high pressure hydrolysis is recycled to make to isolate lignin in sawdust, plant fiber, the substances such as sugar, it is adsorbed in mineral fiber surfaces, mineral fibres is improved to the cementation between other each ingredients, to improve the viscosity of dry powder and mortar, and increases compactness and improve water lock ability, and the anti-pressure ability and toughness of dry powder and mortar are improved using the good mechanical strength of mineral fibres and plant fiber itself, the present invention also extracts sea-mussel mucin from mussel byssus, sea-mussel mucin forms macromolecule network cross linked polymers in mineral fiber surfaces, help to improve viscosity, and further increase the toughness and compression strength of mortar, have Wide application prospect.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of preparation method of high-strength dry powder mortar.
Background technique
Wet type old sand, resin bonded sand and three kinds of used sodium silicate sand can be divided by making old sand.It is phase but for regenerating used
To difficulty.Discarded old sand is alkalinity, and toppling over place, not even a blade of grass grows, in addition China's high grade quartz sand resource relative shortage,
It is exactly the significant wastage to limited resources if not comprehensively utilizing to old sand and largely discarding, and causes serious environment dirty
Dye.China is the first big country of World Foundry industry, the whole nation 1 year discarded 30,000,000 tons of old sand amount or more, be largely by inorganization
Discharge, wherein the discharge amount of waterglass cast used sand is also at million tons or more.The dehydration Gao Mo contained in waterglass cast used sand
Number sodium silicate water glass, sodium carbonate and sodium bicarbonate, can workability to dry powder and mortar and mechanical property adversely affect,
So waterglass cast used sand is not always as the raw materials for production of dry powder and mortar.
Dry powder and mortar refers to aggregate (such as quartz sand), inorganic coagulation material (such as cement) and addition through dry screening process
Agent (such as polymer) etc. carries out a kind of graininess or powdery made of physical mixed by a certain percentage, in packed or in bulk form
It is transported to building site, the material that can be used directly after adding water to mix and stir.Also referred to as dry mortar powder, dry-mixed mortar, dry mixing powder, some are built
Build binder also belong to it is such.Dry powder and mortar plays bonding, liner, protection and decoration function, building in construction industry with thin layer
With fitting-out work using extremely wide.It is compared with conventional on-site stirring mortar, dry powder and mortar is relative at the construction field (site) preparing
Mortar, dry powder and mortar have many advantages.
Wherein fine aggregate used in dry powder and mortar is mainly natural yellow ground, and yellow ground is the original that dosage is most in dry powder and mortar
Material.Present yellow ground is non-renewable resources, and through market survey, ceiling price once increased to 100 yuan/ton, and this in recent years
The trend of a rise in price is also clear that.Protection of the country to natural river course, necessarily will limit the exploitation of natural yellow ground, make the money of yellow ground
Source is more and more nervous, will necessarily bring restriction to the development of dry powder and mortar.
Currently being generally concentrated to the research of dry powder and mortar reduces its cost, and recycles the solids such as flyash and give up
On gurry, such as a kind of environmentally friendly dry powder and mortar of patent, constituent component and its weight percentage ranges be respectively as follows: natural sand 35~
40%；Ore dressing clast 35~40%；Portland cement: 10~30%；Flyash 5~15%；Cellulose ether 0.15~1%.It will
Above-mentioned various substances mix according to the weight ratio, after mixing evenly.This dry powder and mortar is substituted using ore dressing clast
Natural sand makes refuse reclamation to reduce cost, achievees the effect that environmental protection.This environment protecting is unobvious, and adopts more
Mortar is replaced with solid waste, if processing is bad to may cause secondary pollution.
From the point of view of the case where being developed in terms of the dry powder and mortar according to current China, in the following aspects existing defects: at
This is higher, technology is immature, not abundant, the common dry powder and mortar of mortar kind is if you need to improve viscosity and toughness, it is necessary in tradition
Polymer modifiers based on redispersable latex powder is substantially added in cement mortar, leads to that the production cost increases, and protects
Aqueous, compression strength and toughness are general.
Therefore, invent that a kind of good water-retaining property, viscosity is good, compression strength is high, the dry powder and mortar of good toughness is to construction material skill
Art field is necessary.
Summary of the invention
The technical problems to be solved by the invention: for currently used dry powder and mortar water-retaining property is bad, viscosity is insufficient, resist
The defect of Compressive Strength and poor toughness provides a kind of preparation method of high-strength dry powder mortar.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of high-strength dry powder mortar the preparation method comprises the following steps:
20 will be mixed with the revolving speed of 40~60r/min in pre product, cement, Desulphurization, quartz sand investment blender~
Mortar crude product is made in 30min, will stir evenly in mortar crude product, sodium lignin sulfonate, vermiculite powder investment blender up to high
Intensity dry powder and mortar；
The preparation of pre product are as follows:
(1) it weighs in the mussel byssus investment baking oven of 200~300g, dry 3~4h, does under conditions of temperature is 50~60 DEG C
It is ground in investment grinder after dry, crosses 50 meshes and obtain sieving, the ethanol solution for being 50~60% by sieving and mass fraction
It puts into beaker, 2~3h is mixed with the revolving speed of 500~550r/min in blender, and filtrate is obtained by filtration after stirring；
(2) filtrate is put into Rotary Evaporators, it is dense under conditions of temperature is 45~55 DEG C and revolving speed is 300~360r/min
Enriched product is made in 100~120min of contracting evaporation, by enriched product and modified fibre mixed liquor investment beaker, uses agitating device
30~40min is stirred with the revolving speed of 600~700r/min, the hydrogen-oxygen that mass fraction is 10~15% is added dropwise after stirring into beaker
Change sodium solution and adjust pH value to 7.5~8.5, stands 3~4h, filter residue is obtained by filtration after standing, wash with distilled water filter residue 3~5
It is secondary, it dries and pre product is made；
The preparation of modified fibre mixed liquor are as follows:
(1) asbestos and sawdust are put into planetary ball mill, in the condition that revolving speed is 150~180r/min and ratio of grinding media to material is 10:1
Grinding material is made in 40~50min of lower grinding, is in mass ratio in 1:10 investment beaker by grinding material and water, with blender with
The revolving speed of 300~350r/min stirs 20~30min, and it is molten that the acetic acid that mass fraction is 15~20% is added dropwise after stirring into beaker
Liquid adjusts pH value to 5~6 obtained mixed serums；
(2) mixed serum is put into reaction kettle, will be filled in reaction kettle nitrogen increase in reaction kettle air pressure to 0.6~
1.0MPa, then reactor temperature is increased to 160~180 DEG C, constant temperature and pressure reacts 80~100min, and reacting slurry is made, will
Reacting slurry and potassium permanganate investment are placed in the beaker of ice-water bath, stir 40 with blender with the revolving speed of 300~400r/min
~50min is added dropwise sodium hydroxide solution and adjusts pH value to the obtained oxidation slurries of neutrality；
(3) oxidation slurries, sodium citrate, glucose, methane liquid are putted into fermenter, is 32 by fermentor temperature disposed within
In the greenhouse of~36kHz, constant temperature stands 3~5 days, in material investment beaker, will place the beaker resistance heating set in fermentor
In, it increases temperature in heating mantle and stirs the obtained modified fibre mixed liquor of 40~50min to 95~100 DEG C, under constant temperature.
Preferably according to parts by weight, pre product is 8~10 parts, cement is 30~32 parts, Desulphurization is 4~5 parts, stone
Sand is 2~3 parts.
Preferably according to parts by weight, mortar crude product is 20~22 parts, sodium lignin sulfonate is 2~4 parts, vermiculite powder is
1~2 part.
The quality for the ethanol solution that sieving and mass fraction are 50~60% in the specific preparation step (1) of pre product
Than for 1:10.
The mass ratio of enriched product and modified fibre mixed liquor is 1:10 in the specific preparation step (2) of pre product.
The mass ratio of asbestos and sawdust is 6:1 in the specific preparation step (1) of modified fibre mixed liquor.
Sawdust is more preferably that birch, poplar, mahogany are therein in the specific preparation step (1) of modified fibre mixed liquor
It is one or more to mix in any proportion.
The mass ratio of reacting slurry and potassium permanganate is 15:1 in the specific preparation step (2) of modified fibre mixed liquor.
In the specific preparation step (3) of modified fibre mixed liquor preferably according to parts by weight, oxidation slurries are 20~24
Part, sodium citrate are 1.5~2.0 parts, glucose is 0.6~1.0 part, methane liquid is 4~5 parts.
The method have the benefit that:
(1) mixed serum is made with acetic acid soaking and stirring after grinding first by asbestos and sawdust mixed grinding in the present invention, then will
Mixed serum carries out high-temperature high-voltage reaction, potassium permanganate is added after reaction, obtained oxidation slurries are mixed, then starch oxidation
Liquid is putted into fermenter with materials such as methane liquid, sodium citrates and is uniformly mixed, and constant temperature stands, modified fibre is made after high-temperature process
Mixed liquor, then by mussel byssus dry grind, filtrate is obtained by filtration after being impregnated with ethyl alcohol, after filtrate is concentrated and dried with modification
Fiber mixed liquor is mixed, and adjusts pH value reaction, filter residue is obtained by filtration and is placed in pre product, finally by pre product and water
The mixing of the materials such as mud, Desulphurization adds sodium lignin sulfonate, vermiculite stirs evenly up to high-strength dry powder mortar, the present invention
Using asbestos as raw material, sawdust is added, corrosiveness is carried out to asbestos and sawdust using acetic acid, makes the mineral fiber surfaces in asbestos
Degree of roughness increases, and improves bonding degree to the contact area between other each ingredients to reinforce mineral fibres, and utilize high temperature
High pressure hydrolyzes sawdust, makes the lignin having in sawdust, plant fiber and the separation of other organic principles, utilizes organic principle
In each organo-functional group hydrogen bond, the intermolecular force that are formed, reinforce in asbestos Minerals fibre composition and dry powder and mortar respectively at
/ bonding degree, the compactness of mortar interior spatial structure is improved, to reinforce the mechanical strength of dry powder and mortar and viscous
Property, in conjunction with the space structure of mineral fibres densification, to improve the water lock ability of dry powder and mortar；
(2) mussel byssus is dried, grinds by the present invention, organic principle therein is extracted using ethyl alcohol, in organic principle
It with sea-mussel mucin ingredient, is adjusted using pH value, sea-mussel mucin is made to form macromolecule cross-linked network in mineral fiber surfaces
Structure makes the compactness of mineral fibres and space cross-linked structure be strengthened, and helps to improve the viscosity and mechanics of dry powder and mortar
Intensity reinforces the compactness of dry powder and mortar interior spatial structure, is improved the water retention property of dry powder and mortar, has wide
Application prospect.
Specific embodiment
In mass ratio it is in 6:1 investment planetary ball mill by asbestos and sawdust, is 150~180r/min and ball material in revolving speed
It is in mass ratio that 1:10 investment is burnt by grinding material and water than grinding material is made to grind 40~50min under conditions of 10:1
In cup, 20~30min is stirred with the revolving speed of 300~350r/min with blender, mass fraction is added dropwise after stirring into beaker is
15~20% acetic acid solution adjusts pH value to 5~6 obtained mixed serums；Above-mentioned mixed serum is put into reaction kettle, will be reacted
It is filled with nitrogen in kettle and increases in reaction kettle air pressure to 0.6~1.0MPa, then increases reactor temperature to 160~180 DEG C, constant temperature
Constant pressure reacts 80~100min, and reacting slurry is made, and is in mass ratio that 15:1 investment is placed in ice by reacting slurry and potassium permanganate
In the beaker of water-bath, 40~50min is stirred with the revolving speed of 300~400r/min with blender, sodium hydroxide solution is added dropwise and adjusts
Oxidation slurries are made in pH value to neutrality；According to parts by weight, by 20~24 parts of above-mentioned oxidation slurries, 1.5~2.0 parts of citric acids
Sodium, 0.6~1.0 part of glucose, 4~5 parts of methane liquids put into fermenter, by above-mentioned fermentor temperature disposed within be 32~
In the greenhouse of 36kHz, constant temperature stands 3~5 days, in material investment beaker, will place the beaker in resistance heating set in fermentor,
It increases temperature in heating mantle and stirs the obtained modified fibre mixed liquor of 40~50min to 95~100 DEG C, under constant temperature, it is spare；It weighs
In the mussel byssus investment baking oven of 200~300g, dry 3~4h, puts into after dry and grinds under conditions of temperature is 50~60 DEG C
It is ground in grinding machine, crosses 50 meshes and obtain sieving, be in mass ratio by the ethanol solution that sieving is 50~60% with mass fraction
1:10 is put into beaker, and 2~3h is mixed with the revolving speed of 500~550r/min in blender, and filtrate is obtained by filtration after stirring；It will
In above-mentioned filtrate investment Rotary Evaporators, concentration is steamed under conditions of temperature is 45~55 DEG C and revolving speed is 300~360r/min
It sends out 100~120min and enriched product is made, be in mass ratio 1:10 investment by enriched product and spare modified fibre mixed liquor
In beaker, 30~40min is stirred with the revolving speed of 600~700r/min with agitating device, quality point is added dropwise after stirring into beaker
Number adjusts pH value to 7.5~8.5 for 10~15% sodium hydroxide solution, stands 3~4h, filter residue is obtained by filtration after standing, with steaming
Distilled water is cleaned filter residue 3~5 times, dries and pre product is made；According to parts by weight, by 8~10 parts of above-mentioned pre products, 30~32
Part cement, 4~5 parts of Desulphurizations, be mixed 20 with the revolving speed of 40~60r/min in 2~3 parts of quartz sands investment blenders~
Mortar crude product is made in 30min, according to parts by weight, by 20~22 parts of mortar crude products, 2~4 parts of sodium lignin sulfonates, 1~2 portion of leech
It stirs evenly in stone powder investment blender up to high-strength dry powder mortar.
Embodiment 1
Sawdust are as follows: birch
The preparation of mixed serum:
It is in mass ratio in 6:1 investment planetary ball mill by asbestos and birch sawdust, in revolving speed be 150r/min and ratio of grinding media to material is
40min is ground under conditions of 10:1, grinding material is made, be in mass ratio in 1:10 investment beaker by grinding material and water, with stirring
It mixes device and 20min is stirred with the revolving speed of 300r/min, the acetic acid solution that mass fraction is 15% is added dropwise after stirring into beaker and adjusts pH
Value obtains mixed serum to 5；
Aoxidize the preparation of slurries:
Above-mentioned mixed serum is put into reaction kettle, nitrogen will be filled in reaction kettle and increases in reaction kettle air pressure to 0.6MPa, then
Reactor temperature is increased to 160 DEG C, constant temperature and pressure reacts 80min, and reacting slurry is made, reacting slurry and potassium permanganate are pressed
Mass ratio is that 15:1 investment is placed in the beaker of ice-water bath, stirs 40min with blender with the revolving speed of 300r/min, hydrogen-oxygen is added dropwise
Change sodium solution adjusting pH value to neutrality and obtains oxidation slurries；
The liquid preparation of ameliorative fiber mixing:
According to parts by weight, by 20 parts of above-mentioned oxidation slurries, 1.5 parts of sodium citrates, 0.6 part of glucose, 4 parts of methane liquid investment hairs
In fermentation tank, in the greenhouse for being 32kHz by above-mentioned fermentor temperature disposed within, constant temperature stands 3 days, and material in fermentor is put into
It in beaker, places the beaker in resistance heating set, temperature stirs 40min to 95 DEG C, under constant temperature and is modified in raising heating mantle
Fiber mixed liquor, it is spare；
The preparation of filtrate:
It weighs in the mussel byssus investment baking oven of 200g, dry 3h, puts into grinder after dry under conditions of temperature is 50 DEG C
Middle grinding crosses 50 meshes and obtains sieving, is in mass ratio 1:10 investment by the ethanol solution that sieving and mass fraction are 50%
In beaker, 2h is mixed with the revolving speed of 500r/min in blender, and filtrate is obtained by filtration after stirring；
The preparation of pre product:
Above-mentioned filtrate is put into Rotary Evaporators, concentration and evaporation under conditions of temperature is 45 DEG C and revolving speed is 300r/min
Enriched product is made in 100min, is in mass ratio that 1:10 is put into beaker by enriched product and spare modified fibre mixed liquor,
30min is stirred with the revolving speed of 600r/min with agitating device, the sodium hydroxide that mass fraction is 10% is added dropwise after stirring into beaker
Solution adjusts pH value to 7.5, stands 3h, filter residue is obtained by filtration after standing, filter residue 3 times wash with distilled water, drying obtains prefabricated
Product；
The preparation of high-strength dry powder mortar:
According to parts by weight, by 8 parts of above-mentioned pre products, 30 parts of cement, 4 parts of Desulphurizations, 2 parts of quartz sands investment blenders with
The revolving speed of 40r/min is mixed 20min and mortar crude product is made, according to parts by weight, by 20 parts of mortar crude products, 2 parts of lignin
It is stirred evenly in sodium sulfonate, 1 part of vermiculite powder investment blender and obtains high-strength dry powder mortar.
Embodiment 2
Sawdust are as follows: poplar
The preparation of mixed serum:
It is in mass ratio in 6:1 investment planetary ball mill by asbestos and poplar sawdust, in revolving speed be 165r/min and ratio of grinding media to material is
45min is ground under conditions of 10:1, grinding material is made, be in mass ratio in 1:10 investment beaker by grinding material and water, with stirring
It mixes device and 25min is stirred with the revolving speed of 325r/min, the acetic acid solution that mass fraction is 17% is added dropwise after stirring into beaker and adjusts pH
Value obtains mixed serum to 5.5；
Aoxidize the preparation of slurries:
Above-mentioned mixed serum is put into reaction kettle, nitrogen will be filled in reaction kettle and increases in reaction kettle air pressure to 0.8MPa, then
Reactor temperature is increased to 170 DEG C, constant temperature and pressure reacts 90min, and reacting slurry is made, reacting slurry and potassium permanganate are pressed
Mass ratio is that 15:1 investment is placed in the beaker of ice-water bath, stirs 45min with blender with the revolving speed of 350r/min, hydrogen-oxygen is added dropwise
Change sodium solution adjusting pH value to neutrality and obtains oxidation slurries；
The liquid preparation of ameliorative fiber mixing:
According to parts by weight, 22 parts of above-mentioned oxidation slurries, 1.75 parts of sodium citrates, 0.8 part of glucose, 4.5 parts of methane liquids are thrown
Enter in fermentor, in the greenhouse for being 34kHz by above-mentioned fermentor temperature disposed within, constant temperature stands 4 days, by material in fermentor
It puts into beaker, places the beaker in resistance heating set, temperature stirs 45min to 97 DEG C, under constant temperature and obtains in raising heating mantle
Modified fibre mixed liquor, it is spare；
The preparation of filtrate:
It weighs in the mussel byssus investment baking oven of 250g, dry 3.5h under conditions of temperature is 55 DEG C puts into grinding after dry
It is ground in machine, crosses 50 meshes and obtain sieving, be in mass ratio that 1:10 is thrown by the ethanol solution that sieving and mass fraction are 55%
Enter in beaker, 2.5h is mixed with the revolving speed of 525r/min in blender, and filtrate is obtained by filtration after stirring；
The preparation of pre product:
Above-mentioned filtrate is put into Rotary Evaporators, concentration and evaporation under conditions of temperature is 50 DEG C and revolving speed is 330r/min
Enriched product is made in 110min, is in mass ratio that 1:10 is put into beaker by enriched product and spare modified fibre mixed liquor,
35min is stirred with the revolving speed of 650r/min with agitating device, the hydroxide that mass fraction is 12.5% is added dropwise after stirring into beaker
Sodium solution adjusts pH value to 8, stands 3.5h, filter residue is obtained by filtration after standing, filter residue 4 times wash with distilled water, drying obtains pre-
Product processed；
The preparation of high-strength dry powder mortar:
According to parts by weight, 9 parts of above-mentioned pre products, 31 parts of cement, 4.5 parts of Desulphurizations, 2.5 parts of quartz sands are put into blender
In 25min is mixed with the revolving speed of 50r/min mortar crude product is made, according to parts by weight, by 21 parts of mortar crude products, 3 parts of wood
It is stirred evenly in quality sodium sulfonate, 1.5 parts of vermiculite powder investment blenders and obtains high-strength dry powder mortar.
Embodiment 3
Sawdust are as follows: mahogany
The preparation of mixed serum:
It is in mass ratio in 6:1 investment planetary ball mill by asbestos and Peach sawdust, in revolving speed be 180r/min and ratio of grinding media to material is
50min is ground under conditions of 10:1, grinding material is made, be in mass ratio in 1:10 investment beaker by grinding material and water, with stirring
It mixes device and 30min is stirred with the revolving speed of 350r/min, the acetic acid solution that mass fraction is 20% is added dropwise after stirring into beaker and adjusts pH
Value obtains mixed serum to 6；
Aoxidize the preparation of slurries:
Above-mentioned mixed serum is put into reaction kettle, nitrogen will be filled in reaction kettle and increases in reaction kettle air pressure to 1.0MPa, then
Reactor temperature is increased to 180 DEG C, constant temperature and pressure reacts 100min, reacting slurry is made, by reacting slurry and potassium permanganate
It is placed in the beaker of ice-water bath for 15:1 investment in mass ratio, 50min is stirred with the revolving speed of 400r/min with blender, hydrogen is added dropwise
Sodium hydroxide solution adjusts pH value to neutrality and obtains oxidation slurries；
The liquid preparation of ameliorative fiber mixing:
According to parts by weight, by 24 parts of above-mentioned oxidation slurries, 2.0 parts of sodium citrates, 1.0 parts of glucose, 5 parts of methane liquid investment hairs
In fermentation tank, in the greenhouse for being 36kHz by above-mentioned fermentor temperature disposed within, constant temperature stands 5 days, and material in fermentor is put into
It in beaker, places the beaker in resistance heating set, temperature stirs 50min to 100 DEG C, under constant temperature and is modified in raising heating mantle
Fiber mixed liquor, it is spare；
The preparation of filtrate:
It weighs in the mussel byssus investment baking oven of 300g, dry 4h, puts into grinder after dry under conditions of temperature is 60 DEG C
Middle grinding crosses 50 meshes and obtains sieving, is in mass ratio 1:10 investment by the ethanol solution that sieving and mass fraction are 60%
In beaker, 3h is mixed with the revolving speed of 550r/min in blender, and filtrate is obtained by filtration after stirring；
The preparation of pre product:
Above-mentioned filtrate is put into Rotary Evaporators, concentration and evaporation under conditions of temperature is 55 DEG C and revolving speed is 360r/min
Enriched product is made in 120min, is in mass ratio that 1:10 is put into beaker by enriched product and spare modified fibre mixed liquor,
40min is stirred with the revolving speed of 700r/min with agitating device, the sodium hydroxide that mass fraction is 15% is added dropwise after stirring into beaker
Solution adjusts pH value 8.5, stands 4h, filter residue is obtained by filtration after standing, filter residue 5 times wash with distilled water, drying obtains prefabricated production
Object；
The preparation of high-strength dry powder mortar:
It according to parts by weight, will be in 10 parts of above-mentioned pre products, 32 parts of cement, 5 parts of Desulphurizations, 3 parts of quartz sand investment blenders
30min is mixed with the revolving speed of 60r/min, mortar crude product is made, according to parts by weight, by 22 parts of mortar crude products, 4 parts it is wooden
It is stirred evenly in plain sodium sulfonate, 2 parts of vermiculite powder investment blenders and obtains high-strength dry powder mortar.
Comparative example 1 and the preparation method of example 1 are essentially identical, have only the difference is that lacking modified fibre mixed liquor.
Comparative example 2 and the preparation method of example 1 are essentially identical, have only the difference is that lacking pre product.
The high-strength dry powder mortar of 3 Luoyang company of comparative example production.
Tensile bond strength test carries out mortar drawing by JGJ/T70-2009 building mortar basic performance tests method standard
Stretch bonding strength test.
Intensity test is detected by " Standard for inspection and assessment of strength of concrete " GB/T50107-2010.
Water retention test is detected by JGJ/T70-2009.
Backfin is than the backfin ratio by JG149 test mortar.
1 properties of dry-mixed mortar measurement result of table
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Tensile bond strength (MPa) | 0.96 | 0.98 | 0.99 | 0.75 | 0.76 | 0.86 |
| Compression strength (MPa) | 65 | 68 | 69 | 45 | 46 | 53 |
| Water retention (%) | 99.5 | 99.6 | 99.8 | 76.3 | 76.9 | 87.9 |
| It conserves 28d backfin ratio (flexibility) | 3.3 | 3.4 | 3.5 | 2.0 | 2.2 | 2.7 |
From the data in table 1, it can be seen that high-strength dry powder water retentivity of mortar produced by the present invention can be good, water retention reaches 99.8%, viscosity
Height, tensile bond strength reach 0.99MPa, and compression strength is high, and compression strength reaches 69MPa, good toughness, and backfin has than high
Wide application prospect.
The foregoing is merely preferred modes of the invention, are not intended to limit the invention, all in spirit and original of the invention
Within then, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of preparation method of high-strength dry powder mortar, it is characterised in that specific preparation step are as follows:
20 will be mixed with the revolving speed of 40~60r/min in pre product, cement, Desulphurization, quartz sand investment blender~
Mortar crude product is made in 30min, will stir evenly in mortar crude product, sodium lignin sulfonate, vermiculite powder investment blender up to high
Intensity dry powder and mortar；
The specific preparation step of the pre product are as follows:
(1) it weighs in the mussel byssus investment baking oven of 200~300g, dry 3~4h, does under conditions of temperature is 50~60 DEG C
It is ground in investment grinder after dry, crosses 50 meshes and obtain sieving, the ethanol solution for being 50~60% by sieving and mass fraction
It puts into beaker, 2~3h is mixed with the revolving speed of 500~550r/min in blender, and filtrate is obtained by filtration after stirring；
(2) filtrate is put into Rotary Evaporators, it is dense under conditions of temperature is 45~55 DEG C and revolving speed is 300~360r/min
Enriched product is made in 100~120min of contracting evaporation, by enriched product and modified fibre mixed liquor investment beaker, uses agitating device
30~40min is stirred with the revolving speed of 600~700r/min, the hydrogen-oxygen that mass fraction is 10~15% is added dropwise after stirring into beaker
Change sodium solution and adjust pH value to 7.5~8.5, stands 3~4h, filter residue is obtained by filtration after standing, wash with distilled water filter residue 3~5
It is secondary, it dries and pre product is made；
The specific preparation step of the modified fibre mixed liquor are as follows:
(1) asbestos and sawdust are put into planetary ball mill, in the condition that revolving speed is 150~180r/min and ratio of grinding media to material is 10:1
Grinding material is made in 40~50min of lower grinding, is in mass ratio in 1:10 investment beaker by grinding material and water, with blender with
The revolving speed of 300~350r/min stirs 20~30min, and it is molten that the acetic acid that mass fraction is 15~20% is added dropwise after stirring into beaker
Liquid adjusts pH value to 5~6 obtained mixed serums；
(2) mixed serum is put into reaction kettle, will be filled in reaction kettle nitrogen increase in reaction kettle air pressure to 0.6~
1.0MPa, then reactor temperature is increased to 160~180 DEG C, constant temperature and pressure reacts 80~100min, and reacting slurry is made, will
Reacting slurry and potassium permanganate investment are placed in the beaker of ice-water bath, stir 40 with blender with the revolving speed of 300~400r/min
~50min is added dropwise sodium hydroxide solution and adjusts pH value to the obtained oxidation slurries of neutrality；
(3) oxidation slurries, sodium citrate, glucose, methane liquid are putted into fermenter, is 32 by fermentor temperature disposed within
In the greenhouse of~36kHz, constant temperature stands 3~5 days, in material investment beaker, will place the beaker resistance heating set in fermentor
In, it increases temperature in heating mantle and stirs the obtained modified fibre mixed liquor of 40~50min to 95~100 DEG C, under constant temperature.
2. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: preferably by weight
Number meter, the pre product is 8~10 parts, cement is 30~32 parts, Desulphurization is 4~5 parts, quartz sand is 2~3 parts.
3. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: preferably by weight
Number meter, mortar crude product is 20~22 parts, sodium lignin sulfonate is 2~4 parts, vermiculite powder is 1~2 part.
4. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: the tool of pre product
The mass ratio for the ethanol solution that sieving described in preparation step (1) and mass fraction are 50~60% is 1:10.
5. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: the tool of pre product
The mass ratio of enriched product described in preparation step (2) and modified fibre mixed liquor is 1:10.
6. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: modified fibre mixing
The mass ratio of asbestos described in the specific preparation step (1) of liquid and sawdust is 6:1.
7. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: modified fibre mixing
Sawdust described in the specific preparation step (1) of liquid is more preferably that birch, poplar, mahogany are one such or a variety of by appointing
The mixing of meaning ratio.
8. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: modified fibre mixing
The mass ratio of reacting slurry described in the specific preparation step (2) of liquid and potassium permanganate is 15:1.
9. a kind of preparation method of high-strength dry powder mortar according to claim 1, it is characterised in that: modified fibre mixing
In the specific preparation step (3) of liquid preferably according to parts by weight, the oxidation slurries are 20~24 parts, sodium citrate is
1.5~2.0 parts, glucose be 0.6~1.0 part, methane liquid is 4~5 parts.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114315286A (en) * | 2022-01-27 | 2022-04-12 | 广东华南混凝土有限公司 | Special impervious concrete for underwater bridge pier and underwater bridge pier poured by using same |
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| CN114315286A (en) * | 2022-01-27 | 2022-04-12 | 广东华南混凝土有限公司 | Special impervious concrete for underwater bridge pier and underwater bridge pier poured by using same |
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