CN111925172A - High-performance concrete - Google Patents
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- CN111925172A CN111925172A CN202010825965.XA CN202010825965A CN111925172A CN 111925172 A CN111925172 A CN 111925172A CN 202010825965 A CN202010825965 A CN 202010825965A CN 111925172 A CN111925172 A CN 111925172A
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses high-performance concrete which comprises the following components in parts by weight: cement, coarse aggregate, fine aggregate, water and an additive; the dosage of each cubic meter of high-performance concrete is as follows: cement 430-; 1000-; 650-800 kg of fine aggregate; 150 kg of water and 170 kg of water; 5-15 kg of additive. The mineral-free admixture for the high-performance concrete meets the requirements of different design strength grades of high-performance concrete through reasonable formula and selection of the mixture ratio thereof. High impermeability when in use; high volume stability; appropriate high compressive strength; the concrete has good construction performance, good working performance and stable performance, the durability and the strength index meet the standard requirements, the aim of preparing high-performance concrete in areas without admixture is fulfilled, and the construction requirements can be met.
Description
Technical Field
The invention belongs to the field of building materials, and relates to high-performance concrete.
Background
With the rapid development of the economy of all countries in the world, rail transit transportation facilities are widely applied, are important urban infrastructures and are inseparable from the development of modern cities and the daily life of people. The high-performance concrete can comprehensively improve the quality standard of the track bridge engineering, mineral admixture needs to be added into the high-performance concrete used in the building construction process, however, some regions at home and abroad cannot supply the mineral admixture, if the mineral admixture is transported from other places, a large amount of manpower, financial resources and material resources are needed, and even if the mineral admixture is transported, the on-site construction needs cannot be met in a short time. For example, the problems are encountered in the building construction cooperation of China and Hassakestan, the used high-performance concrete needs to be added with mineral admixtures, and the Hassakestan can not supply the mineral admixtures.
Disclosure of Invention
The invention aims to provide high-performance concrete which is free of mineral admixture and can meet construction requirements.
The technical scheme adopted by the invention is as follows:
the high-performance concrete consists of the following components: cement, coarse aggregate, fine aggregate, water and an external additive;
the dosage of each cubic meter of high-performance concrete is as follows:
cement 430-; 1000-; 650-800 kg of fine aggregate; 150 kg of water and 170 kg of water; 5-15 kg of additive;
preferably, the coarse aggregate is low-alkali active coarse aggregate, and comprises one or more of the following raw materials in parts by weight according to the particle size of the coarse aggregate: 0-40 parts of 5-10mm particle size, 20-70 parts of 10-16mm particle size and 10-50 parts of 16-25mm particle size.
Preferably, the fine aggregate is low-alkali active fine aggregate, and comprises one or more of the following raw materials in parts by weight: 50-100 parts of natural sand, 0-50 parts of machine-made sand and 0-50 parts of quartz sand.
Preferably, the cement is portland cement, and the mass fraction of tricalcium aluminate in the cement is 2.5-4.0%.
Preferably, the admixture adopts a polycarboxylic acid composite water reducing agent, and comprises one or more of the following raw materials in parts by weight: 30-80 parts of water reducing agent, 0-20 parts of citric acid and salts thereof, 0-30 parts of sodium gluconate and salts thereof, 0-30 parts of tartaric acid and salts thereof, 0-30 parts of sodium sulfate and salts thereof, and 0-30 parts of sodium nitrite and salts thereof; in the actual selection, commercially available citric acid, sodium gluconate, tartaric acid, sodium sulfate and sodium nitrite can be adopted.
When the strength grade of the high-performance concrete is B50, the content of each cubic meter of the high-performance concrete is as follows: cement 500-; 1000-; 650 + 760 kg of fine aggregate; 155 and 166 kg of water; 5-15 kg of additive.
Preferably, when the strength grade of the high-performance concrete is B50, the content of each cubic meter of the high-performance concrete is as follows: 530 kg of cement; 1062 kg of coarse aggregate; 679 kg of fine aggregate; 161 kg of water; 7.9 kg of additive, water-cement ratio: 0.3, sand ratio: 39 percent.
When the strength grade of the high-performance concrete is B35, the content of each cubic meter of the high-performance concrete is as follows: cement 430-; 1000-; 700 and 800 kg of fine aggregate; 150 portions of water and 166 kilograms of water; 5-15 kg of additive.
Preferably, when the strength grade of the high-performance concrete is B35, the content of each cubic meter of the high-performance concrete is as follows: 430 kg of cement; 1015 kg of coarse aggregate; 797 kg of fine aggregate; 163 kg of water; 6.9 kg of additive, water-cement ratio: 0.38, sand ratio: 44 percent.
The invention has the beneficial effects that:
the high-performance concrete of the invention has no mineral admixture, good working performance and stable performance, and the durability and the strength index meet the standard requirements, thereby solving the aim of preparing the high-performance concrete in admixture-free areas and meeting the construction requirements.
The invention meets the requirements of different design strength grade high-performance concrete through reasonable formula and proportion selection. High barrier properties (key properties for high durability) when in use; high volume stability (low dry shrinkage, low creep, low temperature deformation and high elastic modulus); appropriate high compressive strength; good workability (high fluidity, high cohesiveness, self-compactibility).
Through the research on the concrete mixing proportion and the aggregate physical and chemical test in severe cold areas under the condition of no mineral admixture, the porosity of the coarse aggregate is effectively controlled, a good framework structure is formed, the strength is increased, the high-performance concrete is more compact, and the anti-corrosion capability of the concrete is enhanced; the shape and fineness modulus of fine aggregate particles are optimized, so that the cement slurry has better fluidity, water retention and working performance, the transportation cost of purchasing mineral admixtures in China is reduced, the construction quality of bridge engineering can be ensured, the construction cost can be effectively controlled, and the requirement of construction progress is also met.
The invention has good durability and resistance, and can well resist the influence of factors such as relatively large temperature difference of the weather, long-term irradiation of sunlight, washing of rainwater, freezing and thawing of cold temperature in winter and the like on the construction quality of bridge engineering.
The admixture is matched with other components to improve the adaptability with cement, has one or more of the effects of reducing water, retarding coagulation, protecting plastics, preventing freezing and early strengthening, improves the strength of concrete, increases the quality stability, improves the effect of resisting environmental media of the concrete and keeps good service performance for a long time.
The invention has good strength, the strength of the high-performance concrete is much higher than that of the common concrete, the 28d average compressive strength is between 100 and 120Mpa, and the fracture phenomenon of the bridge engineering is effectively avoided.
The application of the high-performance concrete construction technology ensures the requirement of concrete corrosion resistance under various operating environments, changes the submicroscopic structure of the set cement, changes the structural property of the interface between the set cement and the aggregate, and improves the compactness of the concrete.
Detailed Description
Selecting raw materials:
selecting high-quality concrete raw materials: the sandstone material selects low-alkali active coarse aggregate and fine aggregate produced by Kazakhstan local Astala-Na building company; the cement is Portland cement from Kazakhstan local Saimei cement plant. The additive adopts a polycarboxylic acid composite water reducing agent of Kazakhstan-Pasteur-Miyaya, Inc.
Quality conditions of raw materials:
TABLE 1 index of physical Properties of Fine aggregates
TABLE 2 index of physical Properties of coarse aggregates
TABLE 3 Admixture Performance index
Summer used admixture 116: compounding proper amount of efficient retarding component and plastic maintaining component in the additive; the feed comprises the following raw materials in parts by weight: 30-80 parts of water reducing agent, 0-20 parts of citric acid and salts thereof, 0-30 parts of sodium gluconate and salts thereof and 0-30 parts of tartaric acid and salts thereof.
The winter adopts an additive 116S: the additive is compounded with proper amount of efficient antifreezing component and early strength component. The feed comprises the following raw materials in parts by weight: 30-80 parts of water reducing agent, 0-30 parts of sodium sulfate and salts thereof and 0-30 parts of sodium nitrite and salts thereof.
TABLE 4 Cement Performance index
The high-performance concrete provided by the invention comprises the following components: cement, coarse aggregate, fine aggregate, water and an additive; wherein, the dosage of each cubic meter of high-performance concrete is as follows: cement 430-; 1000-; 650-800 kg of fine aggregate; 150 kg of water and 170 kg of water; 5-15 kg of external additive; the requirements of different design strength grade high-performance concrete are met through reasonable formula and proportion selection. High barrier properties (key properties for high durability) when in use; high volume stability (low dry shrinkage, low creep, low temperature deformation and high elastic modulus); appropriate high compressive strength; good workability (high fluidity, high cohesiveness, self-compactibility).
In some embodiments, the coarse aggregate is low-alkali active coarse aggregate, and comprises one or more of the following raw materials in parts by weight according to the particle size of the coarse aggregate: 0-40 parts of 5-10mm particle size, 20-70 parts of 10-16mm particle size and 10-50 parts of 16-25mm particle size; through reasonable mixing proportion, the porosity of the coarse aggregate is effectively controlled, a good framework structure is formed, and the strength is increased. The high-performance concrete is more compact, and the erosion resistance of the concrete is enhanced.
In some embodiments, the fine aggregate is low-alkali active fine aggregate, and comprises one or more of the following raw materials in parts by weight: 50-100 parts of natural sand, 0-50 parts of machine-made sand and 0-50 parts of quartz sand; the shape and fineness modulus of fine aggregate particles are optimized, so that the cement slurry has better fluidity, water retention and working performance.
In some embodiments, the cement is portland cement, the mass fraction of tricalcium aluminate in the cement is 2.5-4.0%, and the cement is combined with the functions of other components, so that the early hydration heat of concrete can be better inhibited, the hardening speed of the concrete can be delayed, and the early temperature crack of the concrete can be effectively inhibited.
In some embodiments, the admixture adopts a polycarboxylic acid composite water reducing agent, and comprises one or more of the following raw materials in parts by weight: 30-80 parts of water reducing agent, 0-20 parts of citric acid and salts thereof, 0-30 parts of sodium gluconate and salts thereof, 0-30 parts of tartaric acid and salts thereof, 0-30 parts of sodium sulfate and salts thereof, and 0-30 parts of sodium nitrite and salts thereof; in the actual selection, the citric acid, sodium gluconate, tartaric acid, sodium sulfate and sodium nitrite which are sold in the market can be adopted. Through the combination of different components, the adaptability of the cement is improved, and one or more effects of reducing water, retarding coagulation, preserving plastics, preventing freezing and strengthening early strength are achieved. Greatly improves the strength of the concrete, increases the quality stability, improves the environmental medium resistance of the concrete and keeps good service performance for a long time.
When the high-performance concrete is used for construction of the Kazakhstan, the strength grade of the high-performance concrete is implemented according to the Kazakhstan standard.
The high-performance concrete of the invention has a design strength grade B50 as an example, and each cubic meter comprises the following components: cement 500-; 1000-; 650 + 760 kg of fine aggregate; 155 kg of water and 166 kg of water; 5-15 kg of additive.
In the first embodiment, the strength grade of the high-performance concrete is B50, and the content of each cubic meter of the high-performance concrete comprises the following components: 530 kg of cement; 1062 kg of coarse aggregate; 679 kg of fine aggregate; 161 kg of water; additive 7.9 kg, water cement ratio: 0.3, sand ratio: 39 percent.
Example a composition in the formulation:
coarse aggregate: 0-20 parts by weight of particles with the particle diameter of 5-10 mm; 40-70 parts by weight of 10-16mm particle size; 10-30 parts of mixture with the particle diameter of 16-25 mm;
fine aggregate: 50-100 parts of natural sand; 0-20 parts of machine-made sand;
additive: 30-80 parts of a water reducing agent; 0-20 parts by weight of citric acid and salts thereof; 0-30 parts of gluconic acid sodium salt and salt thereof; tartaric acid and its salt 0-30 weight portions.
When the temperature of the construction environment in summer is 20-25 ℃, the precast beam and the cast-in-place beam are manufactured by using the first embodiment, and the strength standard value is 65.48MPa, and then the following tests are carried out;
testing indexes are as follows:
and (3) discharging slump: 205 mm;
slump after 1 h: 180 mm;
1h slump loss over time: 25 mm;
the extension degree of the outgoing machine is as follows: 570 mm;
extension after 1 h: 545 mm;
air content of discharged air: 4.1 percent;
1h gas content: 3.5 percent;
actually measured apparent density: 2450kg/m3；
Content of water-soluble chloride ion: 0.019%;
the paint has good workability and homogeneity, and has no phenomena of layering, segregation and bleeding;
initial setting time: 6h and 35 min;
final setting time: 9h and 48 min;
compressive strength for 7 days: 45.9 MPa;
28-day compressive strength: 79.4 MPa;
300 freeze-thaw cycles relative dynamic elastic modulus: 96 percent
Electric flux at 56 days: 876C;
and (3) anti-permeability grade: p12;
the test results show that the product of the embodiment has good working performance and stable performance, the durability and the compressive strength index meet the standard requirements, and the aim of preparing high-performance concrete in areas without admixture is fulfilled.
The high-performance concrete has the strength grade of B35, and the content of each cubic meter of the high-performance concrete is as follows: cement 430-; 1000-; 700 and 800 kg of fine aggregate; 150 portions of water and 166 kilograms of water; 5-15 kg of additive.
In the second embodiment, the strength grade of the high-performance concrete is B35, and the content of each cubic meter of the high-performance concrete is as follows: 430 kg of cement; 1015 kg of coarse aggregate; 797 kg of fine aggregate; 163 kg of water; 6.9 kg of additive, water-cement ratio: 0.38, sand ratio: 44 percent.
Example two ingredients in the formulation:
coarse aggregate: 0-20 parts by weight of particles with the particle diameter of 5-10 mm; 40-70 parts by weight of 10-16mm particle size; 10-30 parts of mixture with the particle diameter of 16-25 mm;
fine aggregate: 50-100 parts of natural sand; 0-20 parts of machine-made sand;
additive: 30-80 parts of a water reducing agent; 0-30 parts of sodium sulfate and salts thereof; sodium nitrite and its salt 0-30 weight portions.
When the construction environment temperature is-15 to-25 ℃ in winter; the pier column is manufactured by using the second embodiment, the standard value of the strength is 45.84MPa, and then the following tests are carried out;
testing indexes are as follows:
and (3) discharging slump: 215 mm;
slump after 1 h: 195 mm;
1h slump loss over time: 20 mm;
the extension degree of the outgoing machine is as follows: 545 mm;
extension after 1 h: 515 mm;
air content of discharged air: 3.1 percent;
1h gas content: 2.5 percent;
actually measured apparent density: 2420kg/m3；
Content of water-soluble chloride ion: 0.016 percent;
the paint has good workability and homogeneity, and has no phenomena of layering, segregation and bleeding;
initial setting time: 7h05 min;
final setting time: 10h and 10 min;
compressive strength for 7 days: 33.4 MPa;
28-day compressive strength: 55.47 MPa;
300 freeze-thaw cycles relative dynamic elastic modulus: 93 percent
Electric flux at 56 days: 912C;
and (3) anti-permeability grade: p12;
the test results show that the product of the embodiment has good working performance and stable performance, the durability and the compressive strength index meet the standard requirements, and the aim of preparing high-performance concrete in areas without admixture is fulfilled.
TABLE 5 example two 12 durability practical statistical analyses
Statistical analysis in table 5 shows that the relative dynamic elastic modulus after 300 freeze-thaw cycles is greater than 80%; the total electric conductivity of 6h in the age of 56d is less than 1000 ℃, and the result meets the requirements of CECS207 in technical Specification for high-performance concrete.
The product of the invention can adjust the setting time of the concrete in time aiming at different construction seasons and temperatures, if the dosage of the cement and the dosage of the early strength component are generally required to be increased and the dosage of the delayed coagulation component is reduced in winter, the opposite is true in summer; the specific mixing ratio adjusting parameters can be subject to the condition that laboratory simulation environmental conditions reach the expected control indexes. Compared with the traditional high-performance concrete, the mineral admixture-free concrete meets the high-performance concrete standard under the condition of no mineral admixture, and greatly improves the concrete construction quality in mineral admixture-free areas.
The invention has good strength which is much stronger than that of common concrete, the 28d high-performance concrete with the average compressive strength of 100-120Mpa is verified in test engineering, and the fracture phenomenon of bridge engineering is effectively avoided. After the high-performance concrete pouring construction is finished, the high-performance concrete is influenced by some external factors. Finally, cracks, fractures and the like can occur during bridge engineering construction. Therefore, in the high-performance concrete construction, the comprehensive heat preservation and moisture preservation work can be carried out on the bridge engineering construction, so that the quality of the bridge engineering construction can be ensured to the greatest extent, and the safety guarantee is provided for the daily trip of people.
The invention relates to high-performance concrete transportation
1. The high-performance concrete is not suitable for more than 120min from the end of stirring to the use of a construction site. During the transportation process, the addition of external water is strictly forbidden. When the high-performance concrete is transported to a construction site, slump should be checked at random, and every 100m3Randomly sampling and inspecting the concrete for 3-5 times, wherein the inspection result is used as the basis for evaluating the quality of the concrete mixture on the construction site.
2. The delivery time of the concrete should meet the contract rules, and when the contract does not specify, the delivery time should be controlled according to 90min (when the maximum temperature is lower than 25 ℃, the delivery time can be prolonged by 30 min).
3. When the slump of the concrete is required to be adjusted, the external water is strictly not metered into the transport vehicle, and the admixture is added before discharging under the guidance of professional technicians, and the rapid rotation material is adopted for simple stirring after adding. The amount of the admixture and the stirring time should be determined by experiments.
The invention relates to high-performance concrete pouring
1. The high-performance concrete is poured by adopting pumping construction and vibration molding of a high-frequency vibrator.
2. Concrete pumping construction is in accordance with the following regulations of the existing industry standard 'concrete pumping construction technical regulation' JGJ/T10:
(1) when concrete is poured, construction organization and scheduling need to be enhanced, and the supply of concrete needs to ensure the demand of continuous pouring in a specified construction section;
(2) the free pouring height of the concrete is not more than 2 m; under the condition that layered segregation does not occur, the maximum blanking height is controlled within 4 m;
(3) the pumping concrete should be reasonably arranged according to the field condition. When the hands are at high temperature in summer, the hands are covered by wet grass or wet jute bags for cooling, and when the hands are constructed in winter, the hands are covered by heat-insulating materials for heat preservation.
3. When concrete is poured in winter, heating construction measures of the greenhouse in winter are formulated according to relevant regulations of the existing industry standard JGJ 104 for construction engineering in winter and the existing national standard GB 50119 for concrete additive application technical Specifications, when the lowest temperature of a construction environment is higher than-5 ℃, the concrete is put into a mold at normal temperature, a plastic film and a heat-insulating material are covered, and moisture-preserving, heat-storing and maintaining are well carried out. The variety and the quantity of the admixture are determined by experiments according to the requirements of high-performance concrete when the concrete is applied in the winter in severe cold areas.
4. The high-performance concrete is poured and compacted by vibration, and a high-frequency vibrator is adopted for vertical point vibration. When the concrete is thick, the vibration point distribution should be encrypted. Special attention should be paid to secondary vibration and the time of secondary vibration to ensure that the sink shrinkage and surface shrinkage cracks generated in the plastic stage are effectively removed.
The invention relates to high-performance concrete curing
1. The high-performance concrete must be enhanced in moisture retention and maintenance, and particularly, after large-area concrete such as box girder plates and the like is poured, the high-performance concrete should be tightly covered by a plastic film immediately. When the concrete is vibrated for the second time and the surface is pressed and smeared, the covering can be rolled up for operation and then covered in time, and the concrete can be cured by water after final setting. When the water is used for maintenance, the temperature of the water is adapted to the temperature of the concrete, so that cracks of the concrete caused by overlarge temperature difference are avoided, and the moisture-keeping maintenance period is not less than 14 d.
2. When the dosage of the cementing material in the high-performance concrete is larger, the covering moisturizing and curing finger application is adopted. The internal temperature of the concrete is controlled not to exceed 75 ℃ during the moisture preservation and maintenance period; measures should be taken to ensure that the temperature difference between the inside and the outside of the concrete does not exceed 25 ℃. The highest temperature inside the concrete structure can be controlled by controlling the mold-entering temperature, and the temperature difference inside and outside the structure can be controlled by moisturizing and heat-accumulating maintenance; and the risk of structural damage caused by severe change of the surface temperature of the concrete due to environmental influences (such as insolation, sudden temperature drop and the like) is also prevented.
The method is applied to the construction process of the bridge engineering in the astrana city, the technical key points and the advantages of the high-performance concrete technology are comprehensively known and analyzed by combining the difference of different countries and regions on the concrete technical standard, constructors master the construction key points, the function of the construction of the high-performance concrete without admixture is reflected, and the construction quality of the rail transit bridge engineering is improved.
Claims (9)
1. The high-performance concrete is characterized by comprising the following components:
cement, coarse aggregate, fine aggregate, water and an additive;
the dosage of each cubic meter of high-performance concrete is as follows:
cement 430-; 1000-; 650-800 kg of fine aggregate; 150 kg of water and 170 kg of water; 5-15 kg of additive.
2. The high performance concrete according to claim 1,
the coarse aggregate is low-alkali active coarse aggregate, and comprises one or more of the following raw materials in parts by weight according to the particle size of the coarse aggregate: 0-40 parts of 5-10mm particle size, 20-70 parts of 10-16mm particle size and 10-50 parts of 16-25mm particle size.
3. The high performance concrete according to claim 2,
the fine aggregate is low-alkali active fine aggregate and comprises one or more of the following raw materials in parts by weight: 50-100 parts of natural sand, 0-50 parts of machine-made sand and 0-50 parts of quartz sand.
4. The high performance concrete according to claim 3,
the cement is Portland cement, and the mass fraction of tricalcium aluminate in the cement is 2.5-4.0%.
5. The high performance concrete according to claim 4,
the admixture is a polycarboxylic acid composite water reducing agent and comprises one or more of the following raw materials in parts by weight: 30-80 parts of water reducing agent, 0-20 parts of citric acid and salts thereof, 0-30 parts of sodium gluconate and salts thereof, 0-30 parts of tartaric acid and salts thereof, 0-30 parts of sodium sulfate and salts thereof, and 0-30 parts of sodium nitrite and salts thereof.
6. The high performance concrete according to any one of claims 1 to 5,
when the strength grade of the high-performance concrete is B50, the content of each cubic meter of the high-performance concrete is as follows: cement 500-; 1000-; 650 + 760 kg of fine aggregate; 155 kg of water and 166 kg of water; 5-15 kg of additive.
7. The high performance concrete according to claim 6,
when the strength grade of the high-performance concrete is B50, the concrete comprises the following components in per cubic meter: 530 kg of cement; 1062 kg of coarse aggregate; 679 kg of fine aggregate; 161 kg of water; 7.9 kg of additive, water-cement ratio: 0.3, sand ratio: 39 percent.
8. The high performance concrete according to any one of claims 1 to 5,
when the strength grade of the high-performance concrete is B35, the content of each cubic meter of the high-performance concrete is as follows: cement 430-; 1000-; 700 and 800 kg of fine aggregate; 150 kg of water and 166 kg of water; 5-15 kg of additive.
9. The high performance concrete according to claim 8,
when the strength grade of the high-performance concrete is B35, the concrete comprises the following components in per cubic meter: 430 kg of cement; 1015 kg of coarse aggregate; 797 kg of fine aggregate; 163 kg of water; 6.9 kg of additive, water-cement ratio: 0.38, sand ratio: 44 percent.
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| CN202010825965.XA CN111925172A (en) | 2020-08-17 | 2020-08-17 | High-performance concrete |
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| CN202010825965.XA CN111925172A (en) | 2020-08-17 | 2020-08-17 | High-performance concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116514470A (en) * | 2023-03-20 | 2023-08-01 | 北京交通大学 | High-strength concrete and preparation method and application thereof |
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| JP2001031457A (en) * | 1999-07-16 | 2001-02-06 | Taiheiyo Cement Corp | High strength concrete |
| JP2002226253A (en) * | 2001-01-29 | 2002-08-14 | Taiheiyo Cement Corp | High performance concrete |
| CN110981342A (en) * | 2019-12-17 | 2020-04-10 | 广西四维材料科技股份有限公司 | High-strength white concrete |
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2020
- 2020-08-17 CN CN202010825965.XA patent/CN111925172A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001031457A (en) * | 1999-07-16 | 2001-02-06 | Taiheiyo Cement Corp | High strength concrete |
| JP2002226253A (en) * | 2001-01-29 | 2002-08-14 | Taiheiyo Cement Corp | High performance concrete |
| CN110981342A (en) * | 2019-12-17 | 2020-04-10 | 广西四维材料科技股份有限公司 | High-strength white concrete |
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| 曲德仁 主编: "《混凝土工程质量控制》", 30 September 2005, 中国建材工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116514470A (en) * | 2023-03-20 | 2023-08-01 | 北京交通大学 | High-strength concrete and preparation method and application thereof |
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Application publication date: 20201113 |