CN109293301A - A kind of frost-resistant concrete - Google Patents
A kind of frost-resistant concrete Download PDFInfo
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- CN109293301A CN109293301A CN201811117107.9A CN201811117107A CN109293301A CN 109293301 A CN109293301 A CN 109293301A CN 201811117107 A CN201811117107 A CN 201811117107A CN 109293301 A CN109293301 A CN 109293301A
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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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/601—Agents for increasing frost resistance
-
- 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 & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of frost-resistant concretes, belong to the field of building materials, based on parts by weight, including 206-289 parts of cement, 982-1040 parts of rubble, 358-442 parts of river sand, 52-68 parts of flyash, 75-96 parts of miberal powder, 50-75 parts of silicon powder, 2.55-5.78 parts of swelling agent, 10-20 parts of hollow glass microbead, 4-7 parts of water-reducing agent, 10-20 parts of antifreezing agent, 10-15 parts of bentonite, 182-226 parts of water.It can adapt to extremely frigid zones temperature change, not easy freezing, and intensity is high, and compact structure, be not easy crack, durability is good.
Description
Technical field
The present invention relates to the field of building materials, more specifically, it is related to a kind of frost-resistant concrete.
Background technique
Concrete, referred to as concrete are to be used the general designation for the cementing integral engineered composite material that gathers materials by cementitious material
For cement as cementitious material, sand, masonry are to gather materials, and can be cooperated by a certain percentage with water, additive etc., agitated and obtain, extensively
Applied to civil engineering.
In recent years, with the economic sustained and rapid development in China, the infrastructure construction dynamics and scale in China are also continuous
Increase, concrete component application it is also more and more, concrete be widely used in underground engineering, bridge, pond, tunnel, harbour,
The engineering fields such as power station.
According to the regulation of " architectural engineering winter construction regulation " (JGJ104-2011), when outdoor temperature on average continuous 5 days small
When 5 DEG C, into winter construction, when being greater than 5 DEG C within outdoor temperature on average continuous 5 days, winter construction is released.Concrete is in winter
When construction, if maintenance measure is improper, mixed mud is newly poured when temperature is lower than 4 DEG C, the water in concrete will freeze, and freeze
Water will not carry out hydration reaction, and volume increases after water freezing, and the durability that will lead to concrete is insufficient.
In China, extremely frigid zones year-round average temperature is lower, and the subzero temperature time is up to 7 months as long as, when temperature is lower, can delay
The aquation of cement influences the time of concrete construction, and since extremely frigid zones difference variation is larger, and mixed mud is passed through repeatedly repeatedly
Freeze, melt after be easy to appear crackle, become crisp, infiltration phenomenon, the indexs such as intensity, toughness and stability are severely impacted,
The endurance quality of structure is lost, or even seriously affects the normal usage function of structure, reduces the actual life of engineering.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of frost-resistant concrete, can adapt to
Extremely frigid zones temperature change, easy freezing, intensity height, and compact structure, are not easy crack, durability is good.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of frost-resistant concrete, based on parts by weight, including 206-289 parts of cement, 982-1040 parts of rubble, river sand 358-442
Part, 52-68 parts of flyash, 75-96 parts of miberal powder, 50-75 parts of silicon powder, 2.55-5.78 parts of swelling agent, hollow glass microbead 10-
20 parts, 4-7 parts of water-reducing agent, 10-20 parts of antifreezing agent, 10-15 parts of bentonite, 182-226 parts of water.
It can be effectively reduced concrete mortar due to being mixed with antifreezing agent in concrete by using above-mentioned technical proposal
Freezing point, improve the anti-freezing property under subzero temperature of concrete so that concrete formed with aquation be adapted early structure, increase
Add the activation energy of water, accelerates the reaction speed of water and cement under subzero temperature, so that frost-resistant concrete of the invention is suitable for height
Cold local temperature variation, constructs at low temperature.Bentonite, silicon powder ingredient are added in the present invention simultaneously, is effectively improved mixed
The active strength of soil is coagulated, viscosity characteristics enhance its mechanical property, since bentonite has viscosity, enhance each in concrete
Conjugation between ingredient, so that the connection between aggregate is even closer, concrete structure is fine and close, improves its freedom from cracking, prevents
Leak the performances such as durability.
Further, the antifreezing agent includes 20-30 parts of calcium nitrite, cation poly- third based on parts by weight to the present invention
10-15 parts of acrylamide, 5-8 parts of urea, 12-20 parts of lignin sulphonic acid sodium, 1-5 parts of initiator, 1-5 parts of micron order conch meal,
5-8 parts of mesopore molecular sieve, 5-10 parts of polyethylene glycol, 3-8 parts of ground pumice, 30-50 parts of water.
By using above-mentioned technical proposal, since antifreezing agent provided by the invention is compound antifreezer, wherein the Asia being added
Calcium nitrate, urea and polyethylene glycol are common antifreeze component, can reduce the freezing point of solution, keep the lattice structure of ice severely deformed
And frost-heave force can not be formed, so as to make concrete that can still carry out hydration reaction under subzero temperature, and the morning of concrete will not be destroyed
Phase structure guarantees that early strength of concrete is higher, and later strength is also preferable.Be added in antifreezing agent provided by the invention simultaneously sun from
Sub- polyacrylamide, lignin sulphonic acid sodium are decomposable to be gone out to contain cationic substance, the limited surface for being adsorbed onto clay, reduction
The absorption of soil and mountain flour to antifreezing agent effective component and additive improves the aquation effect of cement, in addition, in the antifreezing agent
Due to the microcellular structure of mesopore molecular sieve and ground pumice, the carrier of antifreezing agent can be used as, carry antifreezing agent and be distributed to cement mortar
In, increase the contact area with concrete mortar, improves the utilization rate of antifreezing agent.It is provided by the invention anti-when temperature is lower
Freezing agent can effectively reduce the freezing point of mixed mud, improve hydration reaction, guarantee concrete intensity with higher in winter construction,
Crack will not be generated, its durability is improved, improves the working performance of concrete.
Further, the initiator includes the Oxidizing and Reducing Agents that mass ratio is 1:0.3-1.2 to the present invention.
Further, the oxidant is selected from least one of hydrogen peroxide, potassium peroxydisulfate, ammonium persulfate to the present invention；Institute
State reducing agent be selected from, at least one of potassium sulfite, potassium thiosulfate, oxalic acid.
Further, the antifreezing agent is prepared the present invention using following steps:
(1) by the water of calcium nitrite, cationic polyacrylamide, urea, lignin sulphonic acid sodium and 4/5 formula ratio in 50-60
Wiring solution-forming A under the conditions of DEG C, and keep the temperature；
(2) by the water wiring solution-forming B of initiator and remaining formula ratio；
(3) to the solution B of the solution A a dropping step (2) of step (1), it is warming up to 60-65 DEG C, insulation reaction 1-2h is cooled to
30-40 DEG C, sodium hydroxide solution is added and adjusts the pH value of reaction solution to 6.5-7.5；
(4) polyethylene glycol, mesopore molecular sieve, micron order conch meal, ground pumice are added into the reaction solution of step (3) to be stirred
Uniformly to get antifreezing agent.
By using above technical scheme, antifreezing agent of the present invention can be made using above method step, the teletostage is effectively reduced
The freezing point of concrete when construction hinders water freezing in cement hydration process, applies so that antifreeze mixed mud is suitable for extremely frigid zones
Work, and can guarantee its early strength with higher, compact structure, prevent its from generating crack.
Further, the partial size of the micron order conch meal is 1-3 μm to the present invention.
Further, the miberal powder is S95 grades of ground granulated blast furnace slags to the present invention.
By using above-mentioned technical proposal, due to using ground granulated blast furnace slag, pore structure after improving concrete hardening and strong
Degree, and since ore powder granularity is higher, it can be adsorbed on cement particle surface, so that the Flocculated Cement structure being likely to form originally can not
It is formed, successively plays the role of similar water-reducing agent, the stream of concrete mix can be significantly improved in the identical situation of water consumption
Dynamic speed improves its mobile performance, and has certain effect to the early stage pore structure for improving concrete, is conducive to improve concrete
Durability.
Further, the swelling agent is the agent of azodicarbonamide plastic expansion to the present invention.
Frost-resistant concrete can be made to mould due to selecting the agent of azodicarbonamide plastic expansion by using above-mentioned technical proposal
Sexual stage can produce microdilatancy just to compensate the contraction of plastic stage, therefore frost-resistant concrete internal structure is fine and close in the present invention,
Anti-Chloride Ion Penetration is preferable, and durability is preferable.
The present invention further, in the flyash content of globular glass body be greater than 70%, partial size it is continuously distributed and
Partial size≤3 μm, water demand ratio are not more than 95%.
Cooperate the sand of addition as gathering materials due to the addition lesser flyash of partial size by using above-mentioned technical proposal, it can
With guarantee it is concrete curing after there is preferable intensive, therefore the intensity of concrete can be improved to satisfy the use demand, and should
The content of globular glass body is higher in flyash, these vitreous surfaces are smooth, stablize without corner angle, performance, rises in concrete
Lubricating action reduces the frictional resistance between concrete batching system, can significantly improve the workability that concrete mixes and stirs material, reduces
The heat of hydration reduces concrete drying shrinkage rate, effectively improves impermeability, frost resistance, elasticity modulus of concrete etc..
Further, the water-reducing agent is polycarboxylate water-reducer to the present invention.
In conclusion the invention has the following advantages:
The first, since antifreezing agent is added in the present invention, it can be effectively reduced the freezing point of concrete mortar, improve bearing for concrete
The lower anti-freezing property of temperature increases the activation energy of water so that concrete forms the early structure being adapted with aquation, accelerate water and
Reaction speed of the cement under subzero temperature, so that frost-resistant concrete of the invention is suitable for extremely frigid zones temperature change, at low temperature
It constructs.Bentonite, silicon powder ingredient are added in the present invention simultaneously, is effectively improved the active strength of concrete, viscosity characteristics,
The conjugation in concrete between each ingredient is enhanced, concrete structure is fine and close, improves its freedom from cracking, antiseep durability etc.
Performance.
The second, antifreezing agent provided by the invention is compound antifreezer, add common antifreezing agent effective component calcium nitrite,
It is decomposable out containing cation that cationic polyacrylamide, lignin sulphonic acid sodium are added on the basis of urea and polyethylene glycol
Substance, the limited surface for being adsorbed onto clay reduce the absorption of soil and mountain flour to antifreezing agent effective component and additive, improve
The aquation effect of cement, in addition, can be used as antifreezing agent due to the microcellular structure of mesopore molecular sieve and ground pumice in the antifreezing agent
Carrier carries antifreezing agent and is distributed in cement mortar, increases the contact area with concrete mortar, improve the utilization of antifreezing agent
Rate reduces cost.
Third, the present invention can make the frost-resistant concrete plastic stage can due to selecting the agent of azodicarbonamide plastic expansion
Microdilatancy is generated to compensate the contraction of plastic stage, therefore frost-resistant concrete internal structure is fine and close in the present invention, resisting chloride ion penetration seeps
Saturating better performances, durability are preferable.
Specific embodiment
Invention is further described in detail with reference to embodiments.It should be understood that described in the embodiment of the present invention
Preparation method is only used for illustrating the present invention, rather than limiting the invention, to this hair under concept thereof of the invention
The simple modifications of bright preparation method belong to the scope of protection of present invention.
In following embodiment, used material is both from commercially available.Wherein, commercially available PO42.5 grades of cement selection it is general
Logical portland cement, surface area 326m2/ Kg, presetting period 150min, final setting time 280min；River sand selects day
Sand in so, apparent density 2669kg/m3, clay content 2.4%, moisture content 2.4%, fineness modulus 2.79；Rubble choosing
It is the rubble of 5-20mm continuous grading, apparent density 2706kg/m with partial size3, crush index 5.6%；Flyash selects II grade
Flyash, loss on ignition 3.25%, water demand ratio 95%, fineness 12%；Water-reducing agent is the high property of AN4000 polycarboxylic-acid that is produced from Beijing
Energy water-reducing agent, density 1.049g/cm3, pH value 5.8, water-reducing rate 32%, air content 4.0%, solid content 22.16%, slump 1h
Ongoing change 10mm；The granular size of silicon powder and hollow glass microbead is for 200-300 mesh；Water is drinking water, wherein pH
Value be 5-8, chloride in terms of Cl- < 1800mg/L, sulfate in terms of SO42- < 2100mg/L.
The preparation example 1 of antifreezing agent
(1) calcium nitrite 20kg, cationic polyacrylamide 10kg, urea 5kg, lignin sulphonic acid sodium 12kg and 24kg are matched
The water just measured wiring solution-forming A under the conditions of 50 DEG C, and keep the temperature；
(2) by the water wiring solution-forming B of the hydrogen peroxide of 0.77kg, the potassium sulfite of 0.23kg and 6kg；
(3) to the solution B of the solution A a dropping step (2) of step (1), 60 DEG C are warming up to, insulation reaction 2h is cooled to 30 DEG C, adds
Enter sodium hydroxide solution and adjusts the pH value of reaction solution to 6.5；
(4) polyethylene glycol 5kg, mesopore molecular sieve 5kg, micron order conch meal 1kg, float stone are added into the reaction solution of step (3)
Powder 3kg is uniformly mixed to get antifreezing agent.
The preparation example 2 of antifreezing agent
(1) calcium nitrite 25kg, cationic polyacrylamide 12kg, urea 7kg, lignin sulphonic acid sodium 16kg and 32kg are matched
The water just measured wiring solution-forming A under the conditions of 55 DEG C, and keep the temperature；
(2) by the water wiring solution-forming B of the potassium peroxydisulfate of 1.67kg, the potassium thiosulfate of 1.33kg and 8kg；
(3) to the solution B of the solution A a dropping step (2) of step (1), 62 DEG C are warming up to, insulation reaction 1.5h is cooled to 35 DEG C,
Sodium hydroxide solution is added and adjusts the pH value of reaction solution to 7.5；
(4) polyethylene glycol 8kg is added into the reaction solution of step (3), mesopore molecular sieve 6.5kg, micron order conch meal 3kg, floats
Mountain flour 6kg is uniformly mixed to get antifreezing agent.
The preparation example 3 of antifreezing agent
(1) calcium nitrite 30kg, cationic polyacrylamide 15kg, urea 8kg, lignin sulphonic acid sodium 20kg and 40kg are matched
The water just measured wiring solution-forming A under the conditions of 60 DEG C, and keep the temperature；
(2) by the water wiring solution-forming B of the ammonium persulfate of 2.27kg, the oxalic acid of 2.73kg and 10kg；
(3) to the solution B of the solution A a dropping step (2) of step (1), 65 DEG C are warming up to, insulation reaction 1h is cooled to 40 DEG C, adds
Enter sodium hydroxide solution and adjusts the pH value of reaction solution to 7；
(4) polyethylene glycol 10kg, mesopore molecular sieve 8kg, micron order conch meal 5kg, float stone are added into the reaction solution of step (3)
Powder 8kg is uniformly mixed to get antifreezing agent.
Embodiment 1
Cement 206kg, rubble 982kg, river sand 358kg, flyash 52kg, silicon powder 50kg, miberal powder 75kg, hollow glass is micro-
Pearl 10kg, bentonite 10kg, water-reducing agent 4kg, the antifreezing agent 10kg provided in antifreezing agent preparation example 1 are mixed with the water of 182kg and are stirred
It mixes uniformly.
Embodiment 2
By cement 257kg, rubble 1010kg, river sand 389kg, flyash 60kg, silicon powder 65kg, miberal powder 83kg, hollow glass
Microballon 15kg, bentonite 12kg, water-reducing agent 6kg, the antifreezing agent 15kg provided in antifreezing agent preparation example 2 are mixed with the water of 194kg
It stirs evenly.
Embodiment 3
By cement 289kg, rubble 1040kg, river sand 442kg, flyash 68kg, silicon powder 75kg, miberal powder 96kg, hollow glass
Microballon 20kg, bentonite 15kg, water-reducing agent 7kg, the antifreezing agent 20kg provided in antifreezing agent preparation example 3 are mixed with the water of 226kg
It stirs evenly.
Comparative example 1
By cement 289kg, rubble 1040kg, river sand 442kg, flyash 68kg, silicon powder 75kg, miberal powder 96kg, hollow glass
Microballon 20kg, bentonite 15kg, water-reducing agent 7kg and 226kg water be mixed evenly.
Comparative example 2
By cement 257kg, rubble 1010kg, river sand 389kg, flyash 60kg, silicon powder 65kg, miberal powder 83kg, water-reducing agent
6kg, common antifreezing agent 15kg and 194kg water be mixed evenly.Wherein common frost-resistant concrete is from commercially available.
In order to study resistance to frost, the mechanical property of concrete obtained in embodiment 1-3 and comparative example 1-2, now will
Test block is made in gained concrete described in embodiment 1-3 and comparative example 1-2, then by test block in subzero temperature (- 5 DEG C, -10 DEG C, -15
DEG C) under the conditions of conserved, conserve 7 days, according to " standard for test methods of mechanical properties of ordinary concrete " after curing period
(GB/T50081-2001) Mechanics Performance Testing is carried out to the concrete test block after enduring cold, test result is as shown in table 1.
1 mechanical experimental results of table
As can be seen from Table 1, antifreezing agent is inserted in the present invention can be effectively reduced the freezing point of concrete, reduce the construction of concrete
Temperature inhibits the water during concrete hydrating to freeze, and generates crack because of water of hydration freezing and expansion to can avoid concrete,
So that the construction at low ambient temperatures of concrete also compression strength with higher.And antifreezing agent provided by the invention is compound anti-
Freeze agent, cation polypropylene is added on the basis of adding common antifreezing agent effective component calcium nitrite, urea and polyethylene glycol
Amide, lignin sulphonic acid sodium are decomposable to be gone out to contain cationic substance, the limited surface for being adsorbed onto clay, reduction soil and stone
Absorption of the powder to antifreezing agent effective component and additive improves the aquation effect of cement, in addition, due to mesoporous in the antifreezing agent
The microcellular structure of molecular sieve and ground pumice, can be used as the carrier of antifreezing agent, carries antifreezing agent and is distributed in cement mortar, increase with
The contact area of concrete mortar, improves the utilization rate of antifreezing agent, and antifreezing effect is preferable.
In order to further study the frost resistance of concrete, to concrete test block obtained by embodiment 1-3 and comparative example 1-2,
It is moved instrument using the full-automatic fast freeze-thaw machine of DR-2 type and DT-10W, at interval of the Reactive Powder Concrete plate of 50 circulation measurements
The Relative dynamic modulus of elasticity of the test block of material, wherein the amount of moving modulus is surveyed using JS-II type dynamic modulus tester by hammering method
Fixed, the results are shown in Table 2 for experiment.
Relative dynamic modulus of elasticity of 2 concrete test block of table in different freezing-thawing cycles
As can be seen from Table 2, Frozen-thawed cycled is after 300 times, and the Relative dynamic modulus of elasticity of the test block of embodiment 1-3 still has higher, is
93% or more, be above comparative example 1-2, this explanation, antifreezing agent provided by the invention be added to concrete can be effectively reduced it is mixed
The freezing point of solidifying soil sand slurry, improves the anti-freezing property under subzero temperature of concrete, so that concrete forms the morning being adapted with aquation
Phase structure increases the activation energy of water, accelerates the reaction speed of water and cement under subzero temperature, so that frost-resistant concrete of the invention
It is suitable for extremely frigid zones temperature change, is constructed at low temperature.Bentonite, silicon powder ingredient are added in the present invention simultaneously, is had
Effect improves the active strength of concrete, and viscosity characteristics enhance the conjugation in concrete between each ingredient, and concrete structure causes
Close, so that the freezing and thawing performance of frost-resistant concrete is excellent, durability is good.
Claims (10)
1. a kind of frost-resistant concrete, which is characterized in that based on parts by weight, including 206-289 parts of cement, rubble 982-1040
Part, 358-442 parts of river sand, 52-68 parts of flyash, 75-96 parts of miberal powder, 50-75 parts of silicon powder, 2.55-5.78 parts of swelling agent, in
Empty glass microballoon 10-20 parts, 4-7 parts of water-reducing agent, 10-20 parts of antifreezing agent, 10-15 parts of bentonite, 182-226 parts of water.
2. a kind of frost-resistant concrete according to claim 1, which is characterized in that the antifreezing agent includes based on parts by weight
20-30 parts of calcium nitrite, 10-15 parts of cationic polyacrylamide, 5-8 parts of urea, 12-20 parts of lignin sulphonic acid sodium, draw
Agent 1-5 parts of hair, 1-5 parts of micron order conch meal, 5-8 parts of mesopore molecular sieve, 5-10 parts of polyethylene glycol, 3-8 parts of ground pumice, water 30-
50 parts.
3. a kind of frost-resistant concrete according to claim 2, which is characterized in that the initiator includes that mass ratio is 1:
The Oxidizing and Reducing Agents of 0.3-1.2.
4. a kind of frost-resistant concrete according to claim 3, which is characterized in that the oxidant is selected from hydrogen peroxide, over cure
At least one of sour potassium, ammonium persulfate；The reducing agent is selected from least one of potassium sulfite, potassium thiosulfate, oxalic acid.
5. a kind of frost-resistant concrete according to claim 2, which is characterized in that the antifreezing agent uses following steps system
It is standby:
(1) by the water of calcium nitrite, cationic polyacrylamide, urea, lignin sulphonic acid sodium and 4/5 formula ratio in 50-60
Wiring solution-forming A under the conditions of DEG C, and keep the temperature；
(2) by the water wiring solution-forming B of initiator and remaining formula ratio；
(3) to the solution B of the solution A a dropping step (2) of step (1), it is warming up to 60-65 DEG C, insulation reaction 1-2h is cooled to
30-40 DEG C, sodium hydroxide solution is added and adjusts the pH value of reaction solution to 6.5-7.5；
(4) polyethylene glycol, mesopore molecular sieve, micron order conch meal, ground pumice are added into the reaction solution of step (3) to be stirred
Uniformly to get antifreezing agent.
6. a kind of frost-resistant concrete according to claim 2, which is characterized in that the partial size of the micron order conch meal is 1-
3μm。
7. a kind of frost-resistant concrete according to claim 1, which is characterized in that the miberal powder is S95 grades of ground granulated blast furnace slags.
8. a kind of frost-resistant concrete according to claim 1, which is characterized in that the swelling agent is azodicarbonamide modeling
Property swelling agent.
9. a kind of frost-resistant concrete according to claim 1, which is characterized in that globular glass body contains in the flyash
Amount is greater than 70%, and partial size is continuously distributed and partial size≤3 μm, water demand ratio are not more than 95%.
10. a kind of frost-resistant concrete according to claim 1, which is characterized in that the water-reducing agent is polycarboxylate water-reducer.
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| CN110698119A (en) * | 2019-10-23 | 2020-01-17 | 柴瑞龙 | Concrete containing antifreezing agent and preparation method thereof |
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| CN112500024A (en) * | 2021-01-12 | 2021-03-16 | 沈丽萍 | Preparation method of concrete antifreezing agent |
| CN112759337A (en) * | 2021-03-09 | 2021-05-07 | 山东晟世达科技有限公司 | Active powder concrete with high-content solid waste and preparation and use method thereof |
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| CN113461371A (en) * | 2021-07-22 | 2021-10-01 | 卿森林 | Anti-freezing concrete and production equipment thereof |
| CN113738137A (en) * | 2021-09-23 | 2021-12-03 | 福建润盈建设集团有限公司 | Concrete winter construction anti-freezing method |
| CN114014580A (en) * | 2021-11-17 | 2022-02-08 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Early strength antifreezing agent and preparation method thereof |
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| CN110004839A (en) * | 2019-04-18 | 2019-07-12 | 联建建设工程有限公司 | Large span front fulcrum dragging suspension basket installation method |
| CN110117179A (en) * | 2019-06-06 | 2019-08-13 | 北京泽华路桥工程有限公司 | A kind of environmental protection anti-freezing type concrete and preparation method thereof |
| CN110698119A (en) * | 2019-10-23 | 2020-01-17 | 柴瑞龙 | Concrete containing antifreezing agent and preparation method thereof |
| CN110746134A (en) * | 2019-11-25 | 2020-02-04 | 徐州新路智能科技有限公司 | Concrete sliding formwork additive |
| CN112500024A (en) * | 2021-01-12 | 2021-03-16 | 沈丽萍 | Preparation method of concrete antifreezing agent |
| CN112979253A (en) * | 2021-02-08 | 2021-06-18 | 江苏中砼新材料科技有限公司 | Waterproof and antifreezing recycled concrete and preparation method thereof |
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| CN113461371A (en) * | 2021-07-22 | 2021-10-01 | 卿森林 | Anti-freezing concrete and production equipment thereof |
| CN113738137A (en) * | 2021-09-23 | 2021-12-03 | 福建润盈建设集团有限公司 | Concrete winter construction anti-freezing method |
| CN114014580A (en) * | 2021-11-17 | 2022-02-08 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Early strength antifreezing agent and preparation method thereof |
| CN114014580B (en) * | 2021-11-17 | 2023-02-24 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Early-strength antifreezing agent and preparation method thereof |
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