CN108529947A - A kind of concrete inhibiting distress in concrete - Google Patents
A kind of concrete inhibiting distress in concrete Download PDFInfo
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- CN108529947A CN108529947A CN201710461606.9A CN201710461606A CN108529947A CN 108529947 A CN108529947 A CN 108529947A CN 201710461606 A CN201710461606 A CN 201710461606A CN 108529947 A CN108529947 A CN 108529947A
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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
-
- 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
- C04B2103/65—Water proofers or repellants
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—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 concrete inhibiting distress in concrete, include the raw material of following parts by weight：Cementitious material：Cement：240 parts；Flyash：100 130 parts；Miberal powder：46 58 parts；Second component：Water：148 172 parts；Swelling fiber anti-crack water-proof agent：30 40 parts；Sand：750 780 parts；Stone：1030 1080 parts；Water-reducing agent：46 parts.It can ensure certain intensity by the optimization of the content and proportioning of each component in concrete while effectively reducing the early concrete heat of hydration, to achieve the effect that inhibit distress in concrete.
Description
Technical field
The present invention relates to building material technical field, more particularly to a kind of concrete inhibiting distress in concrete.
Background technology
In current infrastructure, as skyscraper, bridge are built, highway, Hai Gong, high speed rail, big city
The construction such as MTR network in the maximum construction material of dosage belong to concrete.Particularly with super-long wall body (length ＞ 10m) or compared with
The wall of thick (thickness G T.GT.GT 500mm), they belong to mass concrete, pour cement and admixture aquation in early concrete
It generates and discharges a large amount of heat so that its internal temperature rises, concrete expanded by heating.When cement and admixture aquation are basic
When completion, concrete starts cooling and shrinks, but structure suffers restraints to generate tensile stress, when stress is strong more than concrete tension
Thermal cracking is generated when spending, and seriously affects durability, applicability, the even safety of engineering structure.
The scheme for reducing the heat of hydration has very much, such as selects low-heat cement such as slag cements and/or high efficiency water reducing agent is selected to subtract
Few heat of hydration.Either by adding coal ash or miberal powder to reduce cement consumption, to reduce the heat of hydration.But flyash and
Miberal powder replaces equivalent cement, and the tensile strength and compression strength of concrete are also reduced while reducing the heat of hydration.
Invention content
The object of the present invention is to provide a kind of concrete inhibiting distress in concrete, are contained by each component in concrete
The optimization of amount and proportioning can ensure certain intensity while effectively reducing the early concrete heat of hydration, to reach suppression
The effect of distress in concrete processed.
The present invention above-mentioned technical purpose technical scheme is that：
A kind of concrete inhibiting distress in concrete, includes the raw material of following parts by weight：Cementitious material：Cement：240 parts；Fine coal
Ash：100-130 parts；Miberal powder：46-58 parts；Second component：Water：148-172 parts；Swelling fiber anti-crack water-proof agent：30-40 parts；Sand
Son：750-780 parts；Stone：1030-1080 parts；Water-reducing agent：4-6 parts.
Using the above scheme, it on the one hand uses rubble as aggregate, increases the adhesive strength of aggregate and slurry.On the other hand
Using the mineral admixture of large dosage, reduces cement consumption and avoid thermal cracking to reduce the heat of hydration.It is generally believed that miberal powder is early
The activity of phase be higher than flyash, incorporation mineral powder amount it is big early strength of concrete it is big, therefore by mix miberal powder can make up due to
The part intensity that coal ash instead cement is lost, therefore, the content of flyash is less than or is equal in general concrete
Miberal powder.However in the formula of the present invention, in mineral admixture, the dosage of flyash is much more than miberal powder, matches such
Still there is higher intensity than under.In addition, the present invention uses swelling fiber anti-crack water-proof agent, cracking resistance can be played the role of.
Swelling fiber anti-crack water-proof agent can change the stress state of concrete, so that concrete is in pressured state, improve concrete
Anti-crack ability, and there is certain breathing invertibity, that is, it generates after expanding if water deficient will bounce back, but as long as moisture
Again sufficient to generate expansion again, this characteristic is very beneficial for the healing of water-proof concrete microcrack, Z can be continuously maintained concrete
It does not shrink, is impermeable.
Further preferably：Include the raw material of following parts by weight：Cementitious material：Cement：240 parts；Flyash：106-115
Part；Miberal powder：46-50 parts；Second component：Water：148-160 parts；Swelling fiber anti-crack water-proof agent：30-35 parts；Sand：760-780
Part；Stone：1050-1070 parts；Water-reducing agent：4-6 parts.
Further preferably：Include the raw material of following parts by weight：
Cementitious material：Cement：240 parts；Flyash：110 parts；Miberal powder：46 parts；
Second component：Water：158 parts；Swelling fiber anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：
5.9 part.
Using the above scheme, by experimental result it is found that obtained concrete is effectively reducing the early concrete heat of hydration
Ensure certain intensity simultaneously, to achieve the effect that inhibit distress in concrete.
Further preferably：Swelling fiber anti-crack water-proof agent includes the following raw material：Aluminium sulfate micro-expanding agent, polypropylene are fine
Dimension, waterproofing agent, reinforcing agent and compacting agent.
Using the above scheme, swelling fiber anti-crack water-proof agent can change the stress state of concrete, and concrete is made to be in
Pressured state improves the anti-crack ability of concrete, and has certain breathing invertibity, that is, generates after expanding if water deficient
It will bounce back, but as long as moisture is again sufficient to generate expansion again, this characteristic is very beneficial for water-proof concrete microcrack
Healing, Z can be continuously maintained concrete and does not shrink, is impermeable.Fiber in swelling fiber anti-crack water-proof agent is uniformly distributed in concrete
Inside, therefore microcrack necessarily meets with the blocking of fiber in evolution and consumes most of energy；CaO-MgO-Al2O3-SO3
Four kinds of expansion component hydration rates are different, and early stage, mid-term, later stage different microdilatancy power are formed in course of hardening,
The convergent force for offsetting concrete different times in forming process, so crack is difficult to further develop, to block crack to reach
To the effect of cracking resistance.The especially addition of fiber, as mixed huge number of fine ribs in concrete, the suppression of these fiber bars
The process for having made concrete cracking improves the fracture toughness of concrete.Swelling fiber anti-crack water-proof agent in addition to in concrete
Cement hydration reaction occur generate the pore of a large amount of entringite fill concrete, cut off between capillary and other holes
Connection, and its aperture is made to become smaller, to achieve the purpose that air-free concrete, improve impervious, also introduces organic waterproof component,
By film forming mechanism, the capillary porosity of further closed concrete makes concrete permeability resistance be further enhanced.
Further preferably：Sand is river sand；Stone is 5-20mm continuous grading rubbles.
Using the above scheme, compared with common sea sand, quartz sand, river sand is under long-term flowing water is washed away, hit, table
Face is smooth, cleaner.
Further preferably：Water-reducing agent is polycarboxylate water-reducer.
Further preferably：It is a kind of inhibit distress in concrete concrete strength grade be C40.
In conclusion the invention has the advantages that：.
1, flyash is good for the control action effect of the heat of hydration of concrete, therefore mixing flyash in concrete can
To efficiently control the heat of hydration of mass concrete, to achieve the purpose that control the temperature stress of mass concrete；
Although 2, it has been generally acknowledged that the intensity of miberal powder is more than flyash, in the formula of the present invention, in mineral admixture, fine coal
The dosage of ash is much more than miberal powder, and concrete still has higher intensity under such proportioning；
3, the large dosage of flyash and high mixture ratio advantageously reduce the cost of concrete, increase economic efficiency；
4, swelling fiber anti-crack water-proof agent can change the stress state of concrete, and concrete is made to be in pressured state, improve mixed
The anti-crack ability of soil is coagulated, and there is certain breathing invertibity, i.e., if water deficient will bounce back after generation expansion, but only
Want moisture is again sufficient to generate expansion again, this characteristic is very beneficial for the healing of water-proof concrete microcrack, Z can be continuously maintained
Concrete does not shrink, is impermeable.
Specific implementation mode
Invention is further described in detail below.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the protection domain of invention.
Embodiment 1：A kind of concrete inhibiting distress in concrete, is composed of the following raw materials in parts by weight：
Cementitious material：Cement：240 parts；Flyash：100 parts；Miberal powder：56 parts；Second component：Water：158 parts；Swelling fiber cracking resistance
Waterproofing agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：5.9 part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 2：A kind of concrete inhibiting distress in concrete, is composed of the following raw materials in parts by weight：
Cementitious material：Cement：240 parts；Flyash：105 parts；Miberal powder：51 parts；Second component：Water：158 parts；Swelling fiber cracking resistance
Waterproofing agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：5.9 part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 3：Cementitious material：Cement：240 parts；Flyash：110 parts；Miberal powder：46 parts；Second component：Water：158 parts；
Swelling fiber anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：5.9 part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 4：Cementitious material：Cement：240 parts；Flyash：115 parts；Miberal powder：46 parts；
Second component：Water：158 parts；Swelling fiber anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：
5.9 part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 5：Cementitious material：Cement：240 parts；Flyash：120 parts；Miberal powder：46 parts；
Second component：Water：158 parts；Swelling fiber anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：
5.9 part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 6：Cementitious material：Cement：240 parts；Flyash：130 parts；Miberal powder：46 parts；
Second component：Water：158 parts；Swelling fiber anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：
5.9 part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 7：Cementitious material：Cement：240 parts；Flyash：130 parts；Miberal powder：58 parts；
Second component：Water：172 parts；Swelling fiber anti-crack water-proof agent：40 parts；Sand：780 parts；Stone：1080 parts；Water-reducing agent：6
Part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 8：Cementitious material：Cement：240 parts；Flyash：110 parts；Miberal powder：50 parts；
Second component：Water：160 parts；Swelling fiber anti-crack water-proof agent：35 parts；Sand：760 parts；Stone：1070 parts；Water-reducing agent：5
Part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 9：Cementitious material：Cement：240 parts；Flyash：115 parts；Miberal powder：50 parts；
Second component：Water：148 parts；Swelling fiber anti-crack water-proof agent：30 parts；Sand：750 parts；Stone：1050 parts；Water-reducing agent：4
Part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 10：Cementitious material：Cement：240 parts；Flyash：115 parts；Miberal powder：50 parts；
Second component：Water：148 parts；Swelling fiber anti-crack water-proof agent：30 parts；Sand：750 parts；Stone：1030 parts；Water-reducing agent：4
Part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 11：Embodiment 3：Cementitious material：Cement：240 parts；Flyash：110 parts；Miberal powder：46 parts；Second component：
Water：158 parts；Swelling fiber anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：5.9 part.
Wherein sand is quartz sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is polycarboxylate water-reducer.
Embodiment 12：Embodiment 3：Cementitious material：Cement：240 parts；Flyash：110 parts；Miberal powder：46 parts；Second component：
Water：158 parts；Swelling fiber anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：5.9 part.
Wherein sand is river sand；Stone is 5-20mm continuous grading rubbles, and water-reducing agent is naphthalene water reducer.
Compressive strength test：According to《Standard for test methods of mechanical properties of ordinary concrete》GB/50081-2002 regulations, often
The test specimen for the cube specimen and 3 100*100*300mm that reserved 3 sizes of a match ratio are 100*100*100mm, tester
Device is universal hydraulic testing machine.After test piece maintenance is good, its surface and upper and lower pressure-bearing plate face are wiped clean, are put under testing machine
The center of pressing plate ensures that splitting pressure-bearing surface is vertical with top surface when specimen molding.Be further applied load continuous uniform, 0.5- per second
0.8MPa destroys until test specimen is close, records failing load.Concrete axle center Compressive Strength calculates as follows：Fcc=F/A, wherein Fcc
For concrete axial compressive strength (MPa)；F --- test specimen failing load (N)；A --- test specimen bearing area (2mm).
The concrete of embodiment 1-10 was tested into its cubic compressive strength and shaft center compression resistant respectively at 3 days, 7 days and 28 days
Intensity calculates mean compressive strength, and calculate each test specimen 3 days and mean compressive strength at 7 days to reach 28 Mean Crush strong
The percentage of degree.It is tested with non-standard test specimen, the result of gained should be multiplied by conversion coefficient 0.95.Obtained result such as table 1
It is shown.
3 days, 7 days and 28 days cubic compressive strengths and axial compressive strength of 1 each embodiment of table
The concrete of embodiment 1-10 was tested into its cubic compressive strength and shaft center compression resistant respectively at 3 days, 7 days and 28 days
Intensity calculates mean compressive strength, and calculate each test specimen 3 days and mean compressive strength at 7 days to reach 28 Mean Crush strong
The percentage of degree.It is tested with non-standard test specimen, the result of gained should be multiplied by conversion coefficient 0.95.Obtained result such as table 1
It is shown.
By above-mentioned test result it is found that at 28 days, the compression strength of the concrete sample of all embodiments is all higher than
40MPa illustrates that the strength grade of the concrete has reached C40.The test result of comparative example 1-4 it is found that when flyash and
In the case that the blending total amount of miberal powder is constant and the content of other components also remains unchanged, with flyash：The ratio of miberal powder
Increase, intensity has a degree of decline, but the amplitude declined is little, whole all in an order of magnitude.Comparative example 4-6's
Test result is it is found that the content when other components is constant, and when increasing the content of flyash, intensity has a degree of decline,
The Amplitude Ratio embodiment 1-4 of decline is big, but whole all in the same order of magnitude.
Temperature stress is tested：Entire experiment process test specimen is in half heat preservation adiabatci condition, and the sample dimensions of the equipment are
The both ends of 120mm*120mm*1200mm, concrete sample are clamped by two collets, and one end is fixed, the other end and stepper motor phase
Even, during experiment when test piece deformation is more than ± 0.5 μm, displacement control system will behave, and remain test specimen
Deformation is within ± 0.5 μm, to ensure that degree of restraint is 100% during specimen test.During the test, temperature is first for test specimen
Raising declines again, and then test specimen, which first expands, to be shunk, tensile stress is generated due to constraint during contraction, when tensile stress is more than
When the tensile strength of its own, test specimen is pulled off, off-test.Recording crack stress during the test, (crack is more than 0.2mm
When stress), and the Wen Sheng during experiment, test result is as shown in table 2.
The crack stress and Wen Shengbiao of 2 concrete of table
By the test result of embodiment 1-4 it is found that when the blending total amount of flyash and miberal powder is constant and other components contain
In the case that amount also remains unchanged, with flyash：The increase of the ratio of miberal powder, Wen Sheng are substantially reduced, and comparative example
The test result of 4-6 is it is found that the content when other components is constant, and when increasing the content of flyash, temperature, which rises, to be continued to reduce, and is shown
Flyash has critical effect to reducing the heat of hydration.By crack stress value it is found that when using the formula of embodiment 3, tool
There is highest crack stress, shows that its stress crack resistance performance is best, this is because, on the one hand, its material itself has excellent
Intensity, on the other hand, Wen Sheng is smaller under the conditions of by stress, it is not easy to test specimen generate destruction, to make the time
Keep outstanding stress crack resistance performance.
Comprehensive Compressive Strength is tested and the result of temperature stress experiment is it is found that the formula of embodiment 3 has optimal synthesis
Stress crack resistance performance, obtained strength grade of concrete have reached C40.
Claims (7)
1. a kind of concrete inhibiting distress in concrete, characterized in that include the raw material of following parts by weight：Cementitious material：Water
Mud：240 parts；Flyash：100-130 parts；Miberal powder：46-58 parts；Second component：Water：148-172 parts；Swelling fiber cracking resistance is anti-
Aqua：30-40 parts；Sand：750-780 parts；Stone：1030-1080 parts；Water-reducing agent：4-6 parts.
2. a kind of concrete inhibiting distress in concrete according to claim 1, characterized in that including following parts by weight
Raw material：Cementitious material：Cement：240 parts；Flyash：106-115 parts；Miberal powder：46-50 parts；Second component：Water：148-160
Part；Swelling fiber anti-crack water-proof agent：30-35 parts；Sand：760-780 parts；Stone：1050-1070 parts；Water-reducing agent：4-6 parts.
3. a kind of concrete inhibiting distress in concrete according to claim 2, characterized in that including following parts by weight
Raw material：Cementitious material：Cement：240 parts；Flyash：110 parts；Miberal powder：46 parts；Second component：Water：158 parts；Swelling fiber
Anti-crack water-proof agent：34 parts；Sand：767 parts；Stone：1059 parts；Water-reducing agent：5.9 part.
4. a kind of concrete inhibiting distress in concrete according to claim 3, it is characterized in that：The swelling fiber cracking resistance
Waterproofing agent includes the following raw material：Aluminium sulfate micro-expanding agent, polypropylene fibre, waterproofing agent, reinforcing agent and compacting agent.
5. a kind of concrete inhibiting distress in concrete according to claim 4, it is characterized in that：The sand is river sand；
The stone is 5-20mm continuous grading rubbles.
6. a kind of concrete inhibiting distress in concrete according to claim 5, it is characterized in that：The water-reducing agent is poly- carboxylic
Sour water-reducing agent.
7. a kind of concrete inhibiting distress in concrete according to claim 6, it is characterized in that：A kind of inhibition is mixed
The strength grade of the concrete of solidifying soil cracking seam is C40.
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| CN109336498A (en) * | 2018-10-19 | 2019-02-15 | 上海城建市政工程（集团）有限公司 | A kind of concrete inhibiting incipient crack development |
| CN110550921A (en) * | 2019-09-17 | 2019-12-10 | 浙江杭加泽通建筑节能新材料有限公司 | anti-cracking autoclaved aerated concrete block and production method thereof |
| CN110683810A (en) * | 2019-10-25 | 2020-01-14 | 中铁十六局集团地铁工程有限公司 | Crack-resistant concrete suitable for large-scale station and construction method |
| CN111187054A (en) * | 2020-03-25 | 2020-05-22 | 安徽虹达道路桥梁工程有限公司 | Pavement concrete for municipal building engineering |
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| CN112047686A (en) * | 2020-09-04 | 2020-12-08 | 赵荣菊 | Internal expansion joint-breaking type high-strength concrete |
| CN112266218A (en) * | 2020-11-06 | 2021-01-26 | 北京众和聚源混凝土有限公司 | High-strength concrete and preparation method thereof |
| CN112592088A (en) * | 2020-12-23 | 2021-04-02 | 新疆荣高鸿俊新材料技术有限公司 | Concrete micro-expansion reinforcing agent and preparation method thereof, concrete and application thereof |
| CN112624694A (en) * | 2020-12-21 | 2021-04-09 | 青岛光大集团工程有限公司 | Expansion anti-crack fiber concrete and preparation method thereof |
| CN112681324A (en) * | 2020-12-16 | 2021-04-20 | 中建科技集团有限公司 | Construction method of underground ultra-long thin-wall concrete structure and concrete |
| CN112851263A (en) * | 2021-02-25 | 2021-05-28 | 河海大学 | Concrete for early cracking prevention and preparation method thereof |
| CN114436583A (en) * | 2021-12-31 | 2022-05-06 | 中交路桥建设有限公司 | Expansion fiber anti-cracking waterproof concrete and preparation method thereof |
| CN115124285A (en) * | 2021-12-09 | 2022-09-30 | 登封市中联混凝土有限公司 | Environment-friendly impervious concrete |
| CN116283119A (en) * | 2022-12-12 | 2023-06-23 | 中国十九冶集团有限公司 | Anti-cracking and anti-seepage concrete and preparation method thereof |
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