CN110117179A - A kind of environmental protection anti-freezing type concrete and preparation method thereof - Google Patents
A kind of environmental protection anti-freezing type concrete and preparation method thereof Download PDFInfo
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- CN110117179A CN110117179A CN201910492824.8A CN201910492824A CN110117179A CN 110117179 A CN110117179 A CN 110117179A CN 201910492824 A CN201910492824 A CN 201910492824A CN 110117179 A CN110117179 A CN 110117179A
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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
- C04B2111/00017—Aspects relating to the protection of the environment
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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
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
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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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
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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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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of environmentally friendly anti-freezing type concrete and preparation method thereof.Environmentally friendly anti-freezing type concrete comprises the following components in parts by weight: 240-260 parts of cement, 180-200 parts of water, 850-870 parts of rubbles, sand, 60-80 parts of miberal powders, 50-70 parts of flyash, 4.36-10.36 parts of additives, 1.25-3.25 portions of antifreezes, 30-45 parts of waste and old concrete particles, 15-25 parts of waste and old rubber particles, 1.5-3.5 parts of water-and acrylates, 10-15 parts of epoxy resin, 8.6-10.6 parts of polyurethane particles in 770-790 parts；Antifreeze is made of the following components: polyethylene glycol, water, polydextrose, gelatin agar and guar gum are made.The advantages of environmentally friendly anti-freezing type concrete of the invention has anti-freezing property excellent, can efficiently use waste and scrap, can adsorb pollution gas in environment, purify air.
Description
Technical field
The present invention relates to building material technical field, more specifically, it relates to a kind of environmental protection anti-freezing type concrete and its
Preparation method.
Background technique
With the rapid development of our country's economy, environmental problem is increasingly serious, and various waste productions sharply increase, and will discard
Object recycles, and is to protect national resource, the important channel of Promote Sustainable Development.The acceleration of China's urban construction makes waste and old
The yield rapid growth of concrete, the waste and old concrete that China generates every year at present reaches 100,000,000 tons or so, and long-term accumulation is useless
Old concrete will be up to billions of tons.2015, China's waste tire yield reached 3.3 hundred million, recovery utilization rate less than
50%.Waste and old concrete and waste tire can recycle the material as concrete, and recycling amount is big, and can improve
Concrete road surface performance.
Why solidifying soil mixture can gradually condense hardening after pouring, and be due to hydrated cementitious until obtaining final strength
Effect as a result, and the speed of cement aquation except having outside the Pass with concrete composition material itself and match ratio, also with the external world
Temperature is closely related.Hydration is accelerated when the temperature increases, and gain in strength is accelerated, but after temperature is reduced to freezing point, mixes
The freeze injury for coagulating soil can generate bad influence to its performance.This is because: the water that (1) is present in concrete starts to tie at this time
Ice gradually becomes solid phase ice from liquid phase water, causes the water for participating in cement aquation to reduce, hydration slows down, gain in strength
It also can be corresponding slack-off.Temperature continues to reduce, and when the water being present in concrete becomes ice completely, that is, is become completely by liquid phase
When solid phase, cement aquation stops substantially, and the intensity of concrete is caused not to be further added by；(2) volume is about after becoming ice due to water
Increase 9%, while generating the swelling stress of about 2.5MPa, this stress forms strong if it is greater than inside when concrete initial set
Degree, concrete just will receive different degrees of destruction, i.e. early freezc destroys；(3) after water becomes ice, in aggregate and bar list
Face can generate the biggish sleet of particle, weaken the cohesive force of cement slurry and aggregate and reinforcing bar, reduce the intensity of concrete；(4) when
After temperature increases sleet thawing, also various gaps can be formed in inside concrete, lead to the reduction of concrete durability.
Therefore, develop it is a kind of with excellent anti-freezing property and the concrete of waste and scrap can be efficiently used, for promoting
China environmental protection realizes that sustainable development has important display meaning.
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 environmentally friendly anti-freezing type coagulation
Soil has effective use waste and scrap, energy conservation and environmental protection and the excellent advantage of anti-freezing property.
Second object of the present invention is to provide a kind of preparation method of environmentally friendly anti-freezing type concrete have operation letter
Folk prescription just the advantages of.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that a kind of environmental protection anti-freezing type concrete, packet
Include the component of following parts by weight: 240-260 parts of cement, 180-200 parts of water, 850-870 parts of rubbles, sand, 60- in 770-790 parts
80 parts of miberal powders, 50-70 parts of flyash, 4.36-10.36 parts of additives, 1.25-3.25 portions of antifreezes, 30-45 parts of waste and old concretes
Particle, 15-25 part waste and old rubber particle, 1.5-3.5 parts of water-and acrylates, 10-15 parts of epoxy resin, 8.6-10.6 parts of poly- ammonia
Ester particle；
The additive is mixed by water-reducing agent, air entraining agent, early strength agent according to the mass ratio of 1:0.3-0.5:0.4-0.6；
The antifreeze is made of the component of following parts by weight: 4-5.8 parts of polyethylene glycol, 8-10 parts of water, 1.5-2.5 portions of poly- grapes
Sugar, 0.7-1.4 parts of gelatin, 1.1-1.6 parts of agar and 1.3-1.8 parts of guar gums are made.
It is alleviated waste and old by using above-mentioned technical proposal due to incorporation waste and old concrete particle and waste and old rubber particle
The influence of concrete and waste old to pollution remission, while the modulus of waste and old rubber particle is low, deformability is strong, mixes coagulation
In soil, when moisture forms the biggish sleet of particle in concrete, waste and old rubber particle can provide deformation space for sleet,
After sleet melts, waste and old rubber particle restores to the original state, and can prevent inside concrete from occurring more porous, cause concrete resistance to
Long property reduces；Epoxy resin, water-and acrylate and polyurethane particles are added, can increase and moisture is stopped to enter in concrete
Portion, while the adhesion strength of concrete can be enhanced again, prevent sleet from weakening the bonding force between cement and aggregate, moreover it is possible to which enhancing is mixed
Coagulate the cracking resistance of soil；It is mixed and made into additive using water-reducing agent, air entraining agent and early strength agent, air entraining agent can make inside concrete
It is uniformly distributed small bubble, these stomatas can alleviate the frost-heaving force of concrete, improve the non-deformability of concrete, early
Strong agent can accelerate the hydration of cement, make concrete rapid condensation under low temperature alleviation, reduce moisture and freeze to cement water
The influence of change.
The antifreeze made of polydextrose, polyethylene glycol, guar gum etc. is mixed in concrete, can be dramatically increased mixed
The viscosity of soil is coagulated, concrete antifreezing, cracking resistance are improved.
Further, the waste and old concrete particle pass through following pretreatment: waste and old concrete is crushed, be added with it is waste and old
Concrete particle mass ratio is the polyvinyl alcohol of 1:1.3-1.5, after mixing, is heated to 75-85 DEG C, adds and polyvinyl alcohol matter
Amount is uniformly mixed than the nano-titanium dioxide and activated carbon fibre that are 1:1.1-1.3:1.5-1.8, and drying crushes.
By using above-mentioned technical proposal, due to by polyvinyl alcohol and waste and old concrete particle Hybrid Heating, polyvinyl alcohol
Melting, waste and old concrete particle is wrapped up, because having certain viscosity, the nano-titanium dioxide being added afterwards after polyvinyl alcohol melting
It can be adhered on polyvinyl alcohol with activated carbon fibre, the specific surface area of nano-titanium dioxide is larger, being capable of decomposing automobile exhaust
In harmful substance, activated carbon fibre have unique microcellular structure, huge specific surface area and excellent absorption property, activity
Carbon fibe is decomposed such as inside concrete of noxious substance in vehicle exhaust, nano-titanium dioxide, realizes the net of air
Change.
Further, the waste and old rubber particle passes through following pretreatment: waste and old rubber particle clear water is rinsed, it is dry
Afterwards, it is placed in the mixed solution of lotus leaf hydrophobing agent, silica gel and water and stirs, be placed at 40-60 DEG C dry, mixed solution and waste and old rubber
The mass ratio of glue particle is 10:5-8, and the mass ratio of lotus leaf hydrophobing agent, silica gel and water is 0.3-0.5:0.2-0.5:1.
It is dry after waste and old rubber particle is mixed with lotus leaf hydrophobing agent and silica gel by using above-mentioned technical proposal, make lotus
Leaf hydrophobing agent and silica gel wrap up waste and old rubber particle, and lotus leaf hydrophobing agent can increase hydrophobic performance part of waste and old rubber particle,
It prevents moisture from penetrating into inside concrete, improves its impermeability, silica gel can adsorb the oxynitrides in air, eliminate contamination gas
Body realizes the purification of air.
Further, the average grain diameter of the waste and old concrete particle is 5.5-9.5mm, the average grain of waste and old rubber particle
Diameter is 3.5-5.5mm.
By using above-mentioned technical proposal, the partial size of waste and old concrete particle and waste and old rubber particle is different, when mixing, energy
Enough mutually overlap joints, gradation effect is preferable, to enhance the compactness of concrete, improves the waterproof performance and pressure resistance of concrete
Degree, prevents moisture from entering inside concrete, at low ambient temperatures, causes concrete cracking.
Further, the antifreeze the preparation method is as follows: heat water to 40-50 DEG C, polyethylene glycol, stirring is added
Uniformly, and under stirring gelatin is added, until agar is added after dissolution completely, guar gum is added to after dissolving completely in stirring
And polydextrose is cooled to room temperature until completely dissolved.
Further, the water-reducing agent is ligno-sulfate based plasticizer, naphthalene series high-efficiency water-reducing agent, the efficient diminishing of polycarboxylic acids
The composition of one or more of agent；The air entraining agent is rosin resin air entraining agent, in sodium alkyl benzene sulfonate, sodium soap
One or more of compositions；The early strength agent is one or more of triethanolamine, calcium formate, urea.
Further, the flyash is II grades of flyash, density 1.95-2.35g/cm3, bulk density 0.63-
0.75g/cm3, loss on ignition 2-2.6%.
By using above-mentioned technical proposal, the active constituent of flyash is silica and aluminum oxide, with cement and
After water mixing, relatively stable cementitious material can be generated, to make concrete intensity with higher, while in flyash
70% or more particle is amorphous spherical glass body, primarily serves ball bearing effect, plays in concrete mix
Lubricating action, improves the workability of concrete mix, and flyash and sand, haydite etc. constitute rational gradation composition, make each other it
Between fill mutually, concrete density can be effectively increased, further increase the compression strength of concrete.
The miberal powder is S95 grade slag powder, and fluidity ratio is 95-100%, and 28d activity is 95-105%, and specific surface area is
400-450m2/kg。
By using above-mentioned technical proposal, slag powders mineral admixture has " active effect ", " interfacial effect ", " micro- to fill out
Many comprehensive effects such as effect " and " diminishing effect ", the mineral admixtures such as slag powders can not only improve rheological property, reduce water
Change heat, reduce slump-loss, reduces isolation and bleeding, the pore structure and mechanical property of concrete structure can also be improved, mentioned
High waterproof performance and compression strength.
The rubble is the continuous grading rubble that partial size is 5-31.5mm, clay content 0.4-0.5%；The fineness mould of middle sand
Number is 3.1-3.3, clay content 1.8-2.0%.
By using above-mentioned technical proposal, middle sand and partial size within the scope of the fineness modulus are 5-31.5mm continuous grading
Stone, help to increase the filling effect between each aggregate, the hole between component reduced, to improve the company between component
Compactness is connect, certain lubricating action is played, improves the workability of concrete, prevents concrete disintegration, increases coagulation after molding
The compression strength of soil.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that a kind of environmental protection anti-freezing type concrete
Preparation method, comprising the following steps:
S1, antifreeze and additive are added to the water, are stirred evenly；
S2, epoxy resin, water-and acrylate and polyurethane particles are added in waste and old concrete particle and waste and old rubber particle,
It is uniformly mixed, step S1 gains is added, be uniformly mixed；
S3, cement, rubble, middle sand, miberal powder and flyash are uniformly mixed, step S2 gains is added, be uniformly mixed, ring is made
Protect anti-freezing type concrete.
In conclusion the invention has the following advantages:
The first, since the present invention uses waste and old concrete particle and waste and old rubber particle, volume is big, can be effectively relieved useless at present
The pollution problem of old concrete and waste and old rubber particle to alleviation can promote China environmental protection, realize sustainable development；Simultaneously
Epoxy resin, water-and acrylate and polyurethane are added as cementitious material, increases deformability of concrete when by freeze thawing,
Mitigate influence of the Frozen-thawed cycled to concrete, while the modulus of rubber grain is low, deformability is good, epoxy resin, aqueous acrylamide
The cracking resistances such as acid esters and polyurethane are strong, can enhance the cracking resistance of concrete, to increase its freezing and thawing performance.
The second, it is preferably mixed using nano-titanium dioxide and activated carbon fibre and waste and old concrete particle in the present invention
Close because active carbon can adsorb pernicious gas, and nano-titanium dioxide can resolving harmful gas so that waste and old concrete
Grain has the effect of purifying air；Polyethylene glycol can increase the binding force of the raw materials such as waste and old concrete particle cement simultaneously, mention
The compression strength of high concrete.
It is preferably mixed using silica gel and lotus leaf hydrophobing agent with waste and old rubber particle in third, the present invention, lotus leaf hydrophobing agent energy
The hydrophobic performance for enough increasing waste and old rubber particle, improves the seepage capability of concrete, silica gel can decompose the nitrogen oxidation in air
Object is closed, while increasing the deformability of waste and old rubber particle, making waste and old rubber particle not only, there is blocking moisture to enter concrete
The effect of concrete anti-seepage performance is improved in inside, and there are also the effects for eliminating polluted gas in air.
4th, it is mutually cooperateed in the present invention by using water-reducing agent, early strength agent and air entraining agent, makes uniformly to be covered in concrete
Small stomata enhances the non-deformability of concrete, while accelerating the hydration of cement, and the early stage for improving concrete is strong
Degree, the addition of antifreeze can enhance the freeze thawing resistance cycle performance of concrete at low temperature, improve the durability of concrete.
Specific embodiment
Invention is further described in detail with reference to embodiments.
The preparation example 1-3 of antifreeze
Polyethylene glycol is selected from the poly- of the model PEG-1000 that German-Chinese Chemical Industry Science Co., Ltd, Foshan City sells in preparation example 1-3
Ethylene glycol, gelatin are selected from the gelatin that the article No. that Fucheng County sea of clouds adhesive trade Co., Ltd sells is 1203, and agar is selected from river
The agar that the article No. that Nan Xingyuan chemical products Co., Ltd sells is 125, guar gum are selected from the limited public affairs of Shandong broad-spectrum biological science and technology
Take charge of the guar gum of the model GP-J401 sold.
Preparation example 1: according to the proportion in table 1, being heated to 40 DEG C for 8kg water, 4kg polyethylene glycol be added, stirs evenly, and
0.7kg gelatin is added under stirring, until 1.1kg agar is added after dissolution completely, stirring is added to after dissolving completely
1.3kg guar gum and 1.5kg polydextrose are cooled to room temperature until completely dissolved.
The raw material proportioning of antifreeze in 1 preparation example 1-3 of table
Preparation example 2: according to the proportion in table 1, being heated to 45 DEG C for 9kg water, 4.9kg polyethylene glycol be added, stirs evenly, and
1.1kg gelatin is added under stirring, until 1.3kg agar is added after dissolution completely, 1.5kg is added to after dissolving completely in stirring
Guar gum and 2kg polydextrose are cooled to room temperature until completely dissolved.
Preparation example 3: according to the proportion in table 1,10kg water is heated to 50 DEG C, 5.8kg polyethylene glycol is added, stirring is equal
It is even, and 1.4kg gelatin is added under stirring, until 1.6kg agar is added after dissolution completely, stirring adds to after dissolving completely
Enter 1.8kg guar gum and 2.5kg polydextrose, until completely dissolved, is cooled to room temperature.
Embodiment
Water-based acrylic resin is selected from the article No. that Shandong Deng Nuo new material Science and Technology Ltd. sells in embodiment 1-3
The water-based acrylic resin of DN-5559, polyurethane particles are selected from the model that Dongguan City Zhong Gang plastic material Co., Ltd sells
The polyurethane particles of WHT-1195, epoxy resin are selected from the water that Guangzhou is received along the model E51 of Chemical Industry Science Co., Ltd's sale
Property epoxy resin, lotus leaf hydrophobing agent be selected from Shanghai Kai Yin Chemical Co., Ltd. sell article No. be 65451 lotus leaf hydrophobing agent, wood
Mahogany sulfonate water-reducing agent is selected from the ligno-sulfate based plasticizer for the model XY that the industrial Building Materials Factory in Hengyang City Zhengxiang District sells,
Naphthalene series high-efficiency water-reducing agent is selected from the naphthalene series high-efficiency water-reducing agent that the article No. that the sharp Chemical Co., Ltd. in Jinan poly- hundred million sells is 011, poly- carboxylic
Sour high efficiency water reducing agent is selected from the high-efficiency water-reducing agent of poly-carboxylic acid for the model F10 that Henan energy conservation chemical products Co., Ltd sells, silicon
Glue is selected from the silica gel that the trade mark that Dongguan City Cai Guan printed material Co., Ltd sells is H502, and rosin resin air entraining agent is selected from Tianjin
The rosin resin air entraining agent for the model SYL-50 that unsaturated polyester resin research institute, city sells, it is new that activated carbon fibre is selected from Nantong
The activated carbon fibre that the article No. that logical activated carbon fibre Co., Ltd sells is XT-056.
Embodiment 1: a kind of environmental protection anti-freezing type concrete, raw material proportioning is as shown in table 2, the environmental protection anti-freezing type concrete
Preparation method, comprising the following steps:
S1, by 1.25kg/m3Antifreeze and 10.36kg/m3Additive is added to 200kg/m3In water, stir evenly；Antifreeze by
Preparation example 1 is made, and additive is mixed by water-reducing agent, air entraining agent, early strength agent according to the mass ratio of 1:0.3:0.4, water-reducing agent
For ligno-sulfate based plasticizer, air entraining agent is rosin resin air entraining agent, and early strength agent is triethanolamine；
S2, by 10kg/m3Epoxy resin, 1.5kg/m3Water-and acrylate and 8.6kg/m330kg/m is added in polyurethane particles3It is useless
Old concrete particle and 15kg/m3It in waste and old rubber particle, is uniformly mixed, step S1 gains is added, be uniformly mixed；It is waste and old mixed
Solidifying soil particle passes through following pretreatment: waste and old concrete being crushed, is added with waste and old concrete granular mass than gathering for 1:1.3
Vinyl alcohol after mixing, is heated to 75 DEG C, adds the nano-titanium dioxide with polyvinyl alcohol mass ratio for 1:1.1:1.5 and work
Property Carbon fibe, be uniformly mixed, it is dry, be ground into the particle that average grain diameter is 5.5mm；
Waste and old rubber particle passes through following pretreatment: the waste and old rubber particle clear water that average grain diameter is 3.5mm rinsed, it is dry
Afterwards, it is placed in the mixed solution of lotus leaf hydrophobing agent, silica gel and water and stirs, be placed at 40 DEG C dry, mixed solution and waste old
The mass ratio of particle is 10:5, and the mass ratio of lotus leaf hydrophobing agent, silica gel and water is 0.3:0.2:1；
S3, by 240kg/m3Cement, 850kg/m3Rubble, 790kg/m3Middle sand, 80kg/m3Miberal powder and 70kg/m3Flyash mixing
Uniformly, step S2 gains are added, are uniformly mixed, environmental protection anti-freezing type concrete is made；Cement is P.O42.5 cement, and rubble is
Partial size is the continuous grading rubble of 5-31.5mm, and clay content 0.4%, the fineness modulus of sand is 3.1, clay content 1.8%,
Slag powders are S95 grade slag powder, and fluidity ratio is that 95%, 28d activity is 95%, specific surface area 400m2/ kg, flyash are
II grades of flyash, density 1.95g/cm3, bulk density 0.63g/cm3, loss on ignition 2%.
The raw material proportioning of environmentally friendly anti-freezing type concrete in 2 embodiment 1-3 of table
Embodiment 2: a kind of environmental protection anti-freezing type concrete, raw material proportioning is as shown in table 2, the preparation of the environmental protection anti-freezing type concrete
Method, comprising the following steps:
S1, by 2.25kg/m3Antifreeze and 9.36kg/m3Additive is added to 190kg/m3In water, stir evenly；Antifreeze by
Preparation example 2 is made, and additive is mixed by water-reducing agent, air entraining agent, early strength agent according to the mass ratio of 1:0.4:0.5, water-reducing agent
For naphthalene series high-efficiency water-reducing agent, air entraining agent is sodium alkyl benzene sulfonate, and early strength agent is calcium formate；
S2, by 13kg/m3Epoxy resin, 2.5kg/m3Water-and acrylate and 9.6kg/m340kg/m is added in polyurethane particles3It is useless
Old concrete particle and 20kg/m3It in waste and old rubber particle, is uniformly mixed, step S1 gains is added, be uniformly mixed；It is waste and old mixed
Solidifying soil particle passes through following pretreatment: waste and old concrete being crushed, is added with waste and old concrete granular mass than gathering for 1:1.4
Vinyl alcohol after mixing, is heated to 80 DEG C, adds the nano-titanium dioxide with polyvinyl alcohol mass ratio for 1:1.2:1.5 and work
Property Carbon fibe, be uniformly mixed, it is dry, be ground into the particle that average grain diameter is 7.5mm；
Waste and old rubber particle passes through following pretreatment: the waste and old rubber particle clear water that average grain diameter is 4.5mm rinsed, it is dry
Afterwards, it is placed in the mixed solution of lotus leaf hydrophobing agent, silica gel and water and stirs, be placed at 45 DEG C dry, mixed solution and waste old
The mass ratio of particle is 10:6, and the mass ratio of lotus leaf hydrophobing agent, silica gel and water is 0.4:0.3:1；
S3, by 250kg/m3Cement, 860kg/m3Rubble, 780kg/m3Middle sand, 70kg/m3Miberal powder and 60kg/m3Flyash mixing
Uniformly, step S2 gains are added, are uniformly mixed, environmental protection anti-freezing type concrete is made；Cement is P.O42.5 cement, and rubble is
Partial size is the continuous grading rubble of 5-31.5mm, and the fineness modulus of clay content 0.45%, sand is 3.2, and clay content is
1.9%, slag powders are S95 grade slag powder, and fluidity ratio is that 98%, 28d activity is 100%, specific surface area 430m2/ kg, powder
Coal ash is II grades of flyash, density 2.15g/cm3, bulk density 0.7g/cm3, loss on ignition 2.3%.
Embodiment 3: a kind of environmental protection anti-freezing type concrete, raw material proportioning is as shown in table 2, the environmental protection anti-freezing type concrete
Preparation method, comprising the following steps:
S1, by 3.25kg/m3Antifreeze and 4.36kg/m3Additive is added to 180kg/m3In water, stir evenly；Antifreeze by
Preparation example 3 is made, and additive is mixed by water-reducing agent, air entraining agent, early strength agent according to the mass ratio of 1:0.5:0.6, water-reducing agent
For high-efficiency water-reducing agent of poly-carboxylic acid, air entraining agent is sodium soap, and early strength agent is urea；
S2, by 15kg/m3Epoxy resin, 3.5kg/m3Water-and acrylate and 10.6kg/m345kg/m is added in polyurethane particles3
Waste and old concrete particle and 25kg/m3It in waste and old rubber particle, is uniformly mixed, step S1 gains is added, be uniformly mixed；It is waste and old
Concrete particle passes through following pretreatment: waste and old concrete being crushed, is added with waste and old concrete granular mass than for 1:1.5's
Polyvinyl alcohol after mixing, is heated to 85 DEG C, add with polyvinyl alcohol mass ratio be 1:1.3:1.8 nano-titanium dioxide and
Activated carbon fibre is uniformly mixed, and drying is ground into the particle that average grain diameter is 9.5mm；
Waste and old rubber particle passes through following pretreatment: the waste and old rubber particle clear water that average grain diameter is 5.5mm rinsed, it is dry
Afterwards, it is placed in the mixed solution of lotus leaf hydrophobing agent, silica gel and water and stirs, be placed at 50 DEG C dry, mixed solution and waste old
The mass ratio of particle is 10:8, and the mass ratio of lotus leaf hydrophobing agent, silica gel and water is 0.5:0.5:1；
S3, by 260kg/m3Cement, 870kg/m3Rubble, 790kg/m3Middle sand, 60kg/m3Miberal powder and 50kg/m3Flyash mixing
Uniformly, step S2 gains are added, are uniformly mixed, environmental protection anti-freezing type concrete is made；Cement is P.O42.5 cement, and rubble is
Partial size is the continuous grading rubble of 5-31.5mm, and clay content 0.5%, the fineness modulus of sand is 3.3, clay content 2%, mine
Ground-slag is S95 grade slag powder, and fluidity ratio is that 100%, 28d activity is 105%, specific surface area 450m2/ kg, flyash are
II grades of flyash, density 2.35g/cm3, bulk density 0.75g/cm3, loss on ignition 2.6%.
Comparative example
Comparative example 1: a kind of environmental protection anti-freezing type concrete, the difference from embodiment 1 is that, it is not added with water-and acrylate, epoxy
Resin and polyurethane particles.
Comparative example 2: a kind of environmental protection anti-freezing type concrete, the difference from embodiment 1 is that, antifreeze is by Guangzhou river Chu Huagong
The antifreeze that the trade mark that Co., Ltd sells is EG substitutes.
Comparative example 3: the height prepared with embodiment 1 in the Chinese invention patent file application No. is CN201610534417.5
Freeze proof pervious concrete is used as control, high anti-freezing pervious concrete composition raw material (parts by weight): 100 parts of II 42.5R cement of P,
500 parts of limestone gravel, 8 parts of vinal, 5.4 parts of water-reducing agent, 18 parts of nanocomposite filler, 33 parts of water.
Comparative example 4: a kind of environmental protection anti-freezing type concrete, the difference from embodiment 1 is that, waste and old concrete particle is without place
Reason.
Comparative example 5: a kind of environmental protection anti-freezing type concrete, the difference from embodiment 1 is that, waste and old rubber particle is without place
Reason.
Performance detection test
One, frost-resistant concrete is prepared according to method in embodiment 1-3 and comparative example 1-3, and detected in accordance with the following methods freeze proof mixed
The performance for coagulating soil, will test result and is reported in Table 3 below:
1, compression strength and flexural strength: referring to GB/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete " into
The detection of row mechanical performance of concrete,
2, anti-permeability performance: according to GB/T50082-2009 " Standard for test methods of longterm performance and durability of ordinary concrete standard " into
Row test, osmotic pressure 3.5MPa, pressing time 48h；
3, it freezing and thawing performance: is tested, is adopted according to JTGE30-2005 " highway engineering cement and cement concrete testing regulations "
With the anti-freezing property for being rapidly frozen testing machine test concrete, a Frozen-thawed cycled time-consuming 2-5h, freeze thawing temperature is -18 DEG C, examination
Sample is having a size of 100mm × 100mm × 500mm；
4,28d dry shrinkage testing: according to GB/T50082-2009 " Standard for test methods of longterm performance and durability of ordinary concrete mark
It is quasi- " it is tested.
The frost-resistant concrete performance test results of table 3 embodiment 1-3 and comparative example 1-3 preparation
The frost-resistant concrete prepared it can be seen from data in table 3 according to method in embodiment 1-3, flexural strength is big, pressure resistance
Degree is high, and infiltration height is small, and mass loss is only 0.26-0.28% after freeze thawing resistance recycles 360 times within 28 days, and elasticity modulus loss is only
0.54-0.66%, environmental protection anti-freezing type crack-resistant performance of concrete prepared by the present invention, waterproof performance and freezing and thawing performance are good.
Due to being not added with epoxy resin, water-and acrylate and polyurethane particles in comparative example 1, prepared by comparative example 1
Concrete, compression strength and flexural strength are declined compared with concrete prepared by embodiment 1-3, and infiltration height becomes
11.3mm, waterproof performance are deteriorated, after 360 Frozen-thawed cycleds, mass loss 2.32%, and elasticity modulus loss 1.17%, quality damage
Elasticity modulus of becoming estranged loss is larger, illustrates to add epoxy resin, water-and acrylate and polyurethane particles, can obviously increase mixed
The waterproof performance for coagulating soil, prevents moisture from entering inside concrete, prevents moisture from so that concrete cracking phenomena is occurred in low temperature, from
And improve the freezing and thawing performance of concrete.
Comparative example 2 is mixed it can be seen from detection data because using existing antifreeze to substitute antifreeze prepared by the present invention
The infiltration height for coagulating soil becomes larger, and after 360 freeze thawing resistance circulations, mass loss and elasticity modulus loss become larger, and illustrates system of the present invention
Standby antifreeze can effectively improve the waterproof performance and anti-freezing property of concrete.
Comparative example 3 is the high anti-freezing pervious concrete of prior art preparation, after freeze thawing resistance recycles, with the embodiment of the present invention
1-3 is compared, and mass loss and elasticity modulus loss are big, and it is excellent to illustrate that the frost-resistant concrete of 1-3 of embodiment of the present invention preparation has
Freezing and thawing performance.
Two, frost-resistant concrete is prepared according to the method in embodiment 1-3 and comparative example 4-5, and by embodiment 1-3 and comparison
Example 4-5 preparation frost-resistant concrete conserve molding at the standard conditions, the test block of 20cm × 20cm is made, take by each embodiment with
Each 10 pieces of test block made of each comparative example, test block is individually positioned in the identical sealed glass container of specification, each glass holds
The concentration of nitrogen oxides is identical in device, measures nitrogen oxides in each glass container with hydrochloride naphthodiamide spectrophotometer method and exists
12 hours, 24 hours and 48 hours concentration, calculates the degradation rate of nitrogen oxides, and 10 of identical embodiment or comparative example preparation
The test result of test block is averaged, and test result is reported in Table 4 below.
The NOx removal testing result of the frost-resistant concrete of table 4 embodiment 1-3 and comparative example 4-5 preparation
The frost-resistant concrete prepared it can be seen from data in table 4 according to method in embodiment 1-3, to the net of oxynitrides
Rate is higher, can reach 97.3% or more within 24 hours, and it is excellent to illustrate that the frost-resistant concrete of 1-3 of embodiment of the present invention preparation has
Purification air in oxynitrides the advantages of.
Comparative example 4 is not because waste and old concrete particle is preprocessed, the frost-resistant concrete prepared by comparative example 4, to nitrogen oxidation
The purifying rate of conjunction object was 65.4% at 24 hours, and was 65.5% at 48 hours, and the oxynitrides purifying rate with 24 hours becomes
Change less, the oxynitrides purifying rate of frost-resistant concrete prepared by comparative example 4 is poor, illustrates to use polyvinyl alcohol, nanometer two
Titanium oxide and activated carbon fibre can be improved the oxynitrides purifying rate of frost-resistant concrete, have frost-resistant concrete preferable
Purify the effect of pollutants in air.
Comparative example 5 is not because waste and old rubber particle is preprocessed, the nitrogen oxygen of frost-resistant concrete prepared by comparative example 5 at 24 hours
Compound purifying rate is 62.1%, and 48 hours oxynitrides purifying rates are 62.3%, 24 hours and 48 hours nitrogen oxidations
It closes object purifying rate to become larger less, illustrates that the oxynitrides purifying rate of concrete reached maximum at 24 hours, purifying rate is lower, says
The bright oxynitrides purifying rate that can be improved frost-resistant concrete using lotus leaf hydrophobing agent and silica gel makes concrete purification air
Effect is more preferable.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of environmental protection anti-freezing type concrete, which is characterized in that comprise the following components in parts by weight: 240-260 parts of cement, 180-
200 parts of water, 850-870 parts of rubbles, sand, 60-80 parts of miberal powders, 50-70 parts of flyash, 4.36-10.36 are especially in 770-790 parts
Add agent, 1.25-3.25 portions of antifreezes, 30-45 parts of waste and old concrete particles, 15-25 parts of waste and old rubber particles, 1.5-3.5 parts of water
Property acrylate, 10-15 parts of epoxy resin, 8.6-10.6 parts of polyurethane particles；
The additive is mixed by water-reducing agent, air entraining agent, early strength agent according to the mass ratio of 1:0.3-0.5:0.4-0.6；
The antifreeze is made of the component of following parts by weight: 4-5.8 parts of polyethylene glycol, 8-10 parts of water, 1.5-2.5 portions of poly- grapes
Sugar, 0.7-1.4 parts of gelatin, 1.1-1.6 parts of agar and 1.3-1.8 parts of guar gums are made.
2. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the waste and old concrete particle pass through with
Lower pretreatment: waste and old concrete is crushed, and is added with waste and old concrete granular mass than the polyvinyl alcohol for 1:1.3-1.5, is mixed
After conjunction, be heated to 75-85 DEG C, add with polyvinyl alcohol mass ratio be 1:1.1-1.3:1.5-1.8 nano-titanium dioxide and
Activated carbon fibre is uniformly mixed, dry, crushing.
3. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the waste and old rubber particle is by following
Pretreatment: waste and old rubber particle clear water is rinsed, and after dry, be placed in the mixed solution of lotus leaf hydrophobing agent, silica gel and water and stirred,
It is placed at 40-60 DEG C and dries, the mass ratio of mixed solution and waste and old rubber particle is 10:5-8, lotus leaf hydrophobing agent, silica gel and water
Mass ratio be 0.3-0.5:0.2-0.5:1.
4. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the waste and old concrete particle is averaged
Partial size is 5.5-9.5mm, and the average grain diameter of waste and old rubber particle is 3.5-5.5mm.
5. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the preparation method of the antifreeze is such as
Under: 40-50 DEG C is heated water to, polyethylene glycol is added, stirs evenly, and gelatin is added under stirring, until dissolution is complete
Afterwards, agar is added, stirring is added guar gum and polydextrose is cooled to room temperature until completely dissolved to after dissolving completely.
6. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the water-reducing agent is lignosulfonates
The composition of one or more of water-reducing agent, naphthalene series high-efficiency water-reducing agent, high-efficiency water-reducing agent of poly-carboxylic acid；The air entraining agent is rosin
The composition of one or more of resin air entraining agent, sodium alkyl benzene sulfonate, sodium soap；The early strength agent be triethanolamine,
One or more of calcium formate, urea.
7. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the flyash is II grades of flyash,
Density is 1.95-2.35g/cm3, bulk density 0.63-0.75g/cm3, loss on ignition 2-2.6%.
8. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the miberal powder is S95 grade slag powder, stream
For dynamic degree than being 95-100%, 28d activity is 95-105%, specific surface area 400-450m2/kg。
9. environmental protection anti-freezing type concrete according to claim 1, which is characterized in that the rubble is that partial size is 5-31.5mm
Continuous grading rubble, clay content 0.4-0.5%；The fineness modulus of middle sand is 3.1-3.3, clay content 1.8-2.0%.
10. a kind of preparation method of -9 described in any item environmentally friendly anti-freezing type concrete according to claim 1, which is characterized in that
The following steps are included:
S1, antifreeze and additive are added to the water, are stirred evenly；
S2, epoxy resin, water-and acrylate and polyurethane particles are added in waste and old concrete particle and waste and old rubber particle,
It is uniformly mixed, step S1 gains is added, be uniformly mixed；
S3, cement, rubble, middle sand, miberal powder and flyash are uniformly mixed, step S2 gains is added, be uniformly mixed, ring is made
Protect anti-freezing type concrete.
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| CN115321876A (en) * | 2022-08-24 | 2022-11-11 | 安徽皖科新科技发展有限公司 | Antifreezing agent for improving frost heaving stress of concrete and preparation method thereof |
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