CN112408916A - Large-volume concrete - Google Patents
Large-volume concrete Download PDFInfo
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- CN112408916A CN112408916A CN202011359765.6A CN202011359765A CN112408916A CN 112408916 A CN112408916 A CN 112408916A CN 202011359765 A CN202011359765 A CN 202011359765A CN 112408916 A CN112408916 A CN 112408916A
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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
- C04B2201/50—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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Abstract
The application relates to the field of concrete, and particularly discloses large-volume concrete. The mass concrete is prepared from the following raw materials in parts by weight: 140 portions of cement and 150 portions of cement; 140 portions of fly ash and 160 portions of fly ash; 20-40 parts of hydration temperature rise control admixture; 10-20 parts of shrinkage control admixture; 850 parts of fine aggregate 700 and 850 parts; 1070 and 1300 parts of coarse aggregate; 6-10 parts of a retarding water reducer; 140 portions of water and 165 portions. The application of bulky concrete has the characteristics of low temperature rise, low shrink, high strength for can directly pour during the construction, need not additionally to increase supplementary process, have the advantage of simplifying bulky concrete construction process, reduce construction cost.
Description
Technical Field
The present application relates to the field of concrete, and more particularly, it relates to a mass concrete.
Background
With the rapid development of economy and modern building technology, the vigorous construction of large urban public facilities and the rise of high-rise buildings, large-volume concrete is widely applied to modern industrial and civil buildings.
For large-volume concrete, due to the fact that the volume of the large-volume concrete is large, cement hydration can generate a large amount of hydration heat, the concrete is a poor heat conductor, and the internal heat is not easy to dissipate, so that the temperature distribution in a large-volume concrete structure is uneven, the durability is poor, if the large-volume concrete structure cannot be reasonably controlled, the concrete cracks due to too large temperature difference, the harmfulness is very large, and the safety of an engineering structure is directly affected. Particularly for the mass concrete with low strength grade, the cement consumption of the concrete with low strength grade is less, the concrete strength is difficult to ensure, and the increase of the cement consumption can cause large heat release of the hydration of the concrete, thereby bringing difficulty to the temperature and crack control of the mass concrete engineering.
At present, in the construction process of large-volume buildings in China, measures such as skip cabin construction, cooling water pipe pre-embedding, layered pouring, block pouring and the like are mostly adopted, and the influence of hydration heat on the quality of large-volume concrete is reduced to a certain extent.
In view of the above-mentioned related technologies, the inventor thinks that there are defects of complex construction process and high construction cost.
Disclosure of Invention
In order to reduce the construction cost of the mass concrete, the application provides the mass concrete.
The application provides a bulky concrete adopts following technical scheme:
the mass concrete is prepared from the following raw materials in parts by weight:
140 portions of cement and 150 portions of cement;
140 portions of fly ash and 160 portions of fly ash;
20-40 parts of hydration temperature rise control admixture;
10-20 parts of shrinkage control admixture;
850 parts of fine aggregate 700 and 850 parts;
1070 and 1300 parts of coarse aggregate;
6-10 parts of a retarding water reducer;
140 portions of water and 165 portions.
By adopting the technical scheme, as the hydration temperature rise control admixture and the shrinkage control admixture are adopted as the concrete admixture to replace part of cement, the consumption of the cement is reduced, so that the generation of hydration heat in the concrete curing process is reduced, the maximum temperature difference between the inside and the outside in the concrete curing process is reduced, the possibility of cracking of the concrete is reduced, and the quality of the concrete is ensured; the shrinkage control admixture can replace part of cement, inhibit the shrinkage of concrete in the curing process, reduce the tensile stress generated by the difference of the internal shrinkage speed and the external shrinkage speed of the concrete and play a role in reducing the cracking of the concrete. Because the retarding water reducing agent is adopted as the additive, on one hand, the water reducing agent is added, so that the sand rate of the concrete is reduced, the crack generated by the adiabatic temperature rise of the concrete is reduced, on the other hand, the possibility of generating a pouring interface in the concrete is reduced by reducing the concrete condensation speed, the hydration heat release period of the concrete is prolonged, the heat dissipation capacity in the heat release period is increased, the highest temperature rise of the concrete is reduced, the possibility of generating shrinkage cracks in the concrete is reduced, and the strength of the concrete is ensured.
The design of bulky concrete ratio, through reducing the production of hydration heat in bulky concrete curing process, prolong hydration exothermal time and improve the anti shrink performance of concrete, can reduce the possibility that shrinkage crack produced, guarantee bulky concrete intensity, through the reinforcing to concrete self performance for can directly pour during the construction, need not additionally to increase supplementary process, simplify the construction process of bulky concrete, reduce construction cost.
Optionally, the hydration temperature rise control admixture is at least one of phosphorus slag powder and limestone powder.
By adopting the technical scheme, the hydration temperature rise control admixture is adopted, the phosphorus slag powder is slow in self hydration and has a certain retardation effect, namely the generation time of the exothermic peak value of the phosphorus slag powder is later than that of the exothermic peak value of cement, so that the exothermic peak value of concrete is favorably reduced, and the admixture of limestone powder can replace part of the cement, so that the exothermic peak value and the total exothermic quantity of a system are reduced, the possibility of shrinkage cracks generated in the concrete can be reduced by reducing the exothermic peak value of the system, the construction process of the concrete is simplified by improving the performance of the concrete, and the construction cost is reduced.
Optionally, the hydration temperature rise control admixture consists of phosphorus slag powder and limestone powder in a weight ratio of (6-8) to (2-3).
Through adopting above-mentioned technical scheme, phosphorus slag powder and limestone powder cooperation for when reducing the adiabatic temperature rise of concrete, make the concrete have the intensity of preferred, also can compensate the concrete intensity reduction that the cement quantity reduction leads to when reducing concrete shrinkage crack promptly, make the concrete quality obtain great promotion, be convenient for simplify concrete construction process, reduce construction cost.
Optionally, the shrinkage-inhibiting component is at least one of microbeads, kaolin or desulfurized fly ash.
By adopting the technical scheme, the adopted microspheres have the characteristics of high strength and high temperature resistance, are good in thermal stability, can effectively resist the shrinkage deformation of concrete, are small in particle size, have a ball effect, can obviously reduce the water consumption of the concrete, and can be superposed with a water reducing agent to reduce the sand rate and improve the concrete compactness, so that the concrete strength is improved; the metakaolin is adopted, active ingredients in the metakaolin contain water aluminum silicate, and the metakaolin can react with calcium hydroxide precipitated by cement hydration to generate hydrated calcium aluminum yellow feldspar and secondary hydrated calcium silicate gel with gel property, so that the strength of concrete can be increased, the bending resistance toughness of the concrete can be increased, the possibility of shrinkage cracks generated in the concrete is reduced, and the self quality of the concrete is improved; the adopted desulfurized fly ash has certain expansibility, can compensate the concrete shrinkage, reduces the possibility of generating shrinkage cracks on the concrete, and ensures the concrete quality. The shrinkage-resistant concrete has the advantages that the micro-beads, the super-aged soil or the desulfurized fly ash are used as shrinkage inhibition components, so that the shrinkage resistance of the concrete can be improved to a certain extent, namely, the shrinkage of the concrete is inhibited, the shrinkage cracks of the concrete are reduced, the quality of the concrete is guaranteed, the construction process is convenient to simplify, and the construction cost is saved.
Optionally, the shrinkage-inhibiting component consists of microbeads, kaolin and desulfurized fly ash in a weight ratio of (5-7): (1-2): (0.5-1).
Through adopting above-mentioned technical scheme, through microballon, higher age soil and desulfurization ash combined action, strengthened the inhibitory effect to the concrete shrinkage, reduced the possibility that the concrete produced the shrinkage crack, guaranteed the concrete intensity for under the unchangeable circumstances of requirement to the concrete intensity, can simplify construction process, reduce construction cost.
Optionally, the desulfurization ash is a circulating fluidized bed desulfurization ash.
By adopting the technical scheme, the circulating fluidized bed desulfurized fly ash has higher SO content3 2-And SO3 2-The oxidation gathered in the concrete is the main reason of causing the expansion phenomenon, so the circulating fluidized bed desulfurized fly ash is adopted as the component of the shrinkage control admixture, the compensation effect of the concrete shrinkage can be ensured, the possibility of the concrete shrinkage crack generation is further reduced, the concrete strength is ensured, and the concrete construction process can be simplified.
Optionally, the retarding water reducer is composed of a high-performance polycarboxylic acid water reducer and a retarder, and the retarder is at least one of white granulated sugar or sodium gluconate.
By adopting the technical scheme, the retarding water reducer is obtained by compounding the retarder and the polycarboxylic acid water reducer, compared with the naphthalene-based retarding water reducer, the naphthalene-based retarding water reducer has more excellent water reducing performance and slump retaining performance, the mixing amount of the water reducer can be greatly reduced under the requirement of the same water reducing rate, the cost of concrete is reduced, sodium gluconate is introduced as the retarder, the dispersibility and the dispersion retaining property of the polycarboxylic acid water reducer can be obviously improved, the water reducing rate and the slump retaining property are further improved, and proper amount of sodium gluconate and the polycarboxylic acid water reducer can promote the hydration of tricalcium silicate in cement, so that the strength of concrete is improved, the quality of the concrete is enhanced, the simplification of a concrete construction process is facilitated, and the construction cost of the concrete can be effectively reduced.
Optionally, the retarding and water reducing agent contains 1-2 wt% of white sugar and 2-3 wt% of sodium gluconate.
Through adopting above-mentioned technical scheme, the white sugar and the compound doping of sodium gluconate of adoption are as the retarder, it is effectual to utilize the white sugar to slow down the coagulation, but the characteristics of difficult control, through mixing with sodium gluconate again, when guaranteeing the effect of delaying coagulation, reduce the sodium gluconate volume of mixing, and remain dispersibility and the dispersion retentivity to the polycarboxylate water-reducing agent, make the delaying coagulation water-reducing agent have higher price/performance ratio, make when promoting the concrete quality, reduce the improvement of concrete cost, be convenient for simplify concrete construction process, reduce concrete construction cost.
Optionally, the fine aggregate comprises at least one of natural sand and machine-made sand, and the fineness modulus of the fine aggregate is 2.3-3.0; the coarse aggregate is any one of pebbles, broken stones or tailing ores and is 5-25mm continuous gradation.
By adopting the technical scheme, the porosity of the concrete can be reduced and the compactness of the concrete can be increased by adopting the fine aggregate and the coarse aggregate, so that the cement consumption is reduced, the hydration heat is reduced, the drying shrinkage of the concrete is reduced, the generation of concrete cracks is reduced, the quality of the concrete is ensured, and the effect of reducing the construction cost of the concrete is achieved.
Optionally, the mass concrete further comprises an asphalt cold-patch material, and the weight part of the asphalt cold-patch material is 10-20 parts.
By adopting the technical scheme, the asphalt cold-patch material is used as the filler, can absorb hydration heat generated by a part of concrete, and is softened along with the rise of the temperature in the concrete to a temperature above the softening point of the asphalt cold-patch material, so that stress generated by the shrinkage of a part of concrete is counteracted, the possibility of generating shrinkage cracks in the concrete is reduced, the strength of the concrete is ensured, the concrete construction process is simplified, and the concrete construction cost is reduced.
In summary, the present application has the following beneficial effects:
1. because the hydration temperature rise control admixture, the shrinkage control admixture and the retarding and water reducing agent are adopted, the hydration heat release time is prolonged, the anti-shrinkage performance of the concrete is improved, the possibility of shrinkage crack generation is reduced, the strength of the concrete is ensured by reducing the generation of hydration heat in the curing process of the large-volume concrete, the construction can be directly poured by enhancing the self performance of the concrete, additional auxiliary procedures are not needed, the construction process of the large-volume concrete is simplified, and the construction cost is reduced;
2. according to the application, the complex doping of the white sugar and the sodium gluconate is used as the retarder, and the characteristics that the retarding effect of the white sugar is good but is not easy to control are utilized, so that the retarding effect is ensured, the doping amount of the sodium gluconate is reduced, the dispersibility and the dispersion retentivity of the polycarboxylic acid water reducing agent are kept, the retarding water reducing agent has higher cost performance, the concrete quality is improved, the concrete cost is reduced, the concrete construction process is convenient to simplify, and the concrete construction cost is reduced;
3. the fine aggregate and the coarse aggregate adopted by the application can reduce the porosity of concrete and increase the compactness of the concrete, thereby reducing the cement consumption, reducing the hydration heat, reducing the drying shrinkage of the concrete, reducing the generation of concrete cracks, ensuring the concrete quality and achieving the effect of reducing the concrete construction cost.
Detailed Description
The present application will be described in further detail with reference to examples.
The information of cement, fly ash, high-performance polycarboxylate superplasticizer, desulfurized fly ash, microbeads and asphalt cold-patch materials, which are referred to in the following contents, is shown in table 1, and the rest raw materials are common commercial products.
Table 1 raw material information table
Examples
Example 1
The bulk concrete comprises the following raw material components in parts by weight shown in Table 2, and is prepared by the following steps:
the method comprises the following steps: preparing a retarding water reducer, weighing a high-performance polycarboxylate water reducer, white granulated sugar and sodium gluconate, and uniformly stirring and mixing by using a stirrer to obtain the retarding water reducer;
step two: adding the weighed cement, fly ash, fine aggregate, coarse aggregate, hydration temperature rise control admixture and shrinkage control admixture into a concrete mixer for premixing for 30s to obtain a premixed material;
step three: and (3) uniformly mixing the retarding and water reducing agent obtained in the step one and the weighed water in a stirring tank, adding the mixture into a concrete mixer filled with premixed materials, and stirring for 90s to obtain the mass concrete.
Wherein the fine aggregate is natural sand with fineness modulus of 2.0-3.0, and the coarse aggregate is 5-25mm continuous graded pebble.
Example 2
The bulk concrete is different from the concrete in example 1 in that the raw materials and the corresponding weight thereof are shown in table 2, the fine aggregate is machine-made sand with fineness modulus of 2.0-3.0, and the coarse aggregate is crushed stone with 5-25mm continuous gradation.
Example 3
The bulk concrete is different from the concrete in example 1 in that the raw materials and the corresponding weight thereof are shown in table 2, the fine aggregate is mixed sand prepared by machine-made sand and natural sand with fineness modulus of 2.0-3.0, the weight ratio of the machine-made sand to the natural sand is 1:1, and the coarse aggregate is tailing stone with 5-25mm continuous gradation.
TABLE 2 examples 1-3 raw materials and their respective weights (kg)
Examples 4 to 7
A mass concrete different from example 1 in that the hydration temperature rise controlling admixture was prepared in the composition and amount shown in Table 3.
Table 3 examples 4-7 hydration exotherm control admixtures components and amounts (kg)
Examples 8 to 15
A mass concrete was different from example 1 in that the components and the amounts of the shrinkage-controlling admixture were as shown in Table 4.
TABLE 4 compositions and amounts (kg) of shrinkage control admixtures of examples 8-15
Example 16
The large-volume concrete is different from the concrete in example 1 in that the desulfurized fly ash is magnesium desulfurized fly ash.
Examples 17 to 20
A large-volume concrete is different from the concrete in example 1 in that the components and the using amount of the slow-release water reducing agent are shown in Table 5.
TABLE 5 Components and amounts (kg) of shrinkage control admixtures of examples 17-20
Example 21
The difference between the bulk concrete and the embodiment 1 is that the raw materials of the bulk concrete further comprise an asphalt cold-patch material, the materials of the asphalt cold-patch material are shown in table 6, and in the preparation of the bulk concrete, the asphalt cold-patch material is added with cement, fly ash and the like in the second preparation step and stirred to obtain a premixed material.
Examples 22 to 24
A large-volume concrete, which is different from example 21 in that the materials of the asphalt cold-patch material are shown in Table 6.
TABLE 6 compositions and amounts (kg) of asphalt cold patch materials of examples 21-24
| Raw materials | Example 21 | Example 22 | Example 23 | Example 24 |
| Asphalt cold-patch material | 2.0 | 4.0 | 1.6 | 4.4 |
Comparative example
Comparative examples 1 to 6
A large-volume concrete, which is different from example 1 in that the raw material components and the corresponding weights thereof are shown in Table 7.
TABLE 7 COMPARATIVE EXAMPLES 1-6 materials and their respective weights (kg)
Performance test
Test-compressive Strength detection
Test subjects: the concrete produced in examples 1 to 24 and comparative examples 1 to 6.
The test method comprises the following steps: and manufacturing and maintaining the test piece according to the 5 th part of test piece manufacturing and maintaining methods in the standard of ordinary concrete mechanical property test methods (GBT 50081-2002), and detecting the compressive strength for 90d according to the 6 th part of compressive strength test method after the test age is reached.
And (3) test results: as shown in table 8.
Test two adiabatic temperature rise detection
Test subjects: the concrete produced in examples 1 to 24 and comparative examples 1 to 6.
The test method comprises the following steps: the 7d adiabatic temperature rise test was carried out according to the 4.18 part concrete adiabatic temperature rise test method in the Hydraulic concrete test protocol (DLT 5150-2017).
And (3) test results: as shown in table 8.
Test three-shrinkage Performance test
Test subjects: the concrete produced in examples 1 to 24 and comparative examples 1 to 6.
The test method comprises the following steps: the 28d self-shrinkage test was carried out according to the non-contact method in the 8 th part shrinkage test in the Standard test methods for Long-term Performance and durability of ordinary concrete (GBT 50082-2009).
And (3) test results: as shown in table 8.
Test four crack condition detection
Test subjects: the concrete produced in examples 1 to 24 and comparative examples 1 to 6.
The test method comprises the following steps: the total crack area per unit area is detected according to the 9 th part early crack test method in the standard of test methods for long-term performance and durability of ordinary concrete (GBT 50082-2009).
And (3) test results: as shown in table 8.
TABLE 8 test results
Referring to examples 1-24 in combination with Table 8, it can be seen that the bulk concrete prepared with low cement levels in the examples has a 90d compressive strength of 45MPa to 56MPa, an adiabatic temperature rise of less than 30 ℃ and a 28d self-shrinkage of only 1.5X 10-4-2.5×10-4The anti-cracking grade is L-V, the anti-cracking material has the characteristics of low temperature rise, low shrinkage and high strength, the anti-permeability grade can reach P8, and the performance is excellent.
It can be seen by combining examples 1-3 and comparative examples 1-6 and by combining Table 8 that the adiabatic temperature rise of example 7d is lower than that of comparative example, the self-shrinkage rate of 28d is lower than that of comparative example, the total cracking area per unit area is also significantly lower than that of comparative example, and the compressive strength of 90d is not much different from that of comparative example and is significantly higher than that of comparative example 2 and comparative example 3, i.e., the temperature rise resistance and durability of concrete are significantly improved. The concrete is added with the hydration temperature rise control admixture and the shrinkage control admixture and the retarding and water reducing agent, so that the strength of the concrete can be ensured, the adiabatic temperature rise of the concrete can be reduced, and the durability can be improved. And then make can directly pour when the construction, need not additionally to increase supplementary process, reached and simplified bulky concrete construction technology, reduced construction cost's advantage.
By combining the examples 1 and 4-7 and combining the table 8, it can be seen that when the phosphorus slag powder and the limestone powder are compounded according to a proper proportion to be used as the hydration temperature rise control admixture, the durability and the adiabatic temperature rise of the prepared concrete are further improved, which indicates that the effect is better when the phosphorus slag powder and the limestone powder are compounded and added.
It can be seen from the combination of example 1 and examples 8-15 and table 8 that when the microbeads, metakaolin and circulating fluidized bed desulfurization ash are compounded in a proper ratio as a shrinkage control admixture, the durability and adiabatic temperature rise of the prepared concrete are further improved, which indicates that the effect of the compounded addition of the phosphorus microbeads, metakaolin and circulating fluidized bed desulfurization ash is better.
When the concrete prepared by using the circulating fluidized bed desulfurized fly ash is higher in 90d compressive strength, lower in 28d self-shrinkage rate and lower in total cracking area per unit area than the concrete prepared by using the magnesium desulfurized fly ash as seen by combining the concrete prepared by using the circulating fluidized bed desulfurized fly ash with the example 1 and the example 16 and combining the concrete with the table 8, the performance improvement effect of the concrete by using the circulating fluidized bed desulfurized fly ash is more prominent than that by using the magnesium desulfurized fly ash, namely, the circulating fluidized bed desulfurized fly ash is more suitable for being used as a shrinkage control admixture.
It can be seen from the combination of the examples 1 and 17 to 20 and the combination of table 8 that when the white sugar and the sodium gluconate are compounded to be used as the retarder, the performance of the prepared concrete is more balanced in all aspects, and the overall performance is better than that of the concrete using the white sugar or the sodium gluconate alone as the retarder, which indicates that the performance of the concrete is improved more evenly by using the retarding water reducing agent prepared by compounding the white sugar and the sodium gluconate as the retarder and the high-performance polycarboxylic acid water reducing agent, and the retarding water reducing agent is more suitable for mass concrete.
It can be seen from the combination of example 1 and examples 21 to 24 and the combination of table 8 that the 28d self-shrinkage rate and the total cracking area per unit area of the concrete prepared by adding a proper amount of asphalt cold-patch additive to the concrete are reduced, and the 90d compressive strength is improved, that is, the durability of the concrete can be improved, which is beneficial to improving the self-performance of the large-volume concrete, further ensuring that the concrete can be directly poured during the construction of the large-volume concrete, and no additional auxiliary process is required, so that the purposes of simplifying the construction process of the large-volume concrete and reducing the construction cost are achieved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The mass concrete is characterized by being prepared from the following raw materials in parts by weight:
140 portions of cement and 150 portions of cement;
140 portions of fly ash and 160 portions of fly ash;
20-40 parts of hydration temperature rise control admixture;
10-20 parts of shrinkage control admixture;
850 parts of fine aggregate 700 and 850 parts;
1070 and 1300 parts of coarse aggregate;
6-10 parts of a retarding water reducer;
140 portions of water and 165 portions.
2. The bulk concrete according to claim 1, wherein: the hydration temperature rise control admixture is at least one of phosphorus slag powder or limestone powder.
3. The mass concrete according to claim 2, wherein: the hydration temperature rise control admixture consists of phosphorus slag powder and limestone powder in the weight ratio of (6-8) to (2-3).
4. The bulk concrete according to claim 1, wherein: the shrinkage inhibition component is at least one of microbeads, super-aged soil or desulfurized fly ash.
5. The mass concrete according to claim 4, wherein: the shrinkage inhibition component consists of microbeads, kaolin and desulfurized ash in a weight ratio of (5-7): (1-2): 0.5-1).
6. The mass concrete according to claim 4 or 5, wherein: the desulfurization ash is circulating fluidized bed desulfurization ash.
7. The bulk concrete according to claim 1, wherein: the retarding and water reducing agent is composed of a high-performance polycarboxylic acid water reducing agent and a retarder, wherein the retarder is at least one of white granulated sugar or sodium gluconate.
8. The bulk concrete according to claim 7, wherein: the retarding and water reducing agent contains 1-2 wt% of white sugar and 2-3 wt% of sodium gluconate.
9. The bulk concrete according to claim 1, wherein: the fine aggregate comprises at least one of natural sand and machine-made sand, and the fineness modulus of the fine aggregate is 2.3-3.0; the coarse aggregate is any one of pebbles, broken stones or tailing ores and is 5-25mm continuous gradation.
10. The bulk concrete according to claim 1, wherein: the mass concrete also comprises an asphalt cold-patch material, and the weight part of the asphalt cold-patch material is 10-20 parts.
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| CN202011359765.6A CN112408916A (en) | 2020-11-27 | 2020-11-27 | Large-volume concrete |
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| CN202011359765.6A CN112408916A (en) | 2020-11-27 | 2020-11-27 | Large-volume concrete |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185233A (en) * | 2021-05-17 | 2021-07-30 | 中国五冶集团有限公司 | Super-retarding concrete and preparation method thereof |
| CN113277802A (en) * | 2021-05-24 | 2021-08-20 | 杭州三中新型建材科技有限公司 | High-permeability concrete using recycled aggregate and preparation method thereof |
| CN113880533A (en) * | 2021-11-25 | 2022-01-04 | 十九冶成都建设有限公司 | Ultra-large volume concrete |
| CN114524645A (en) * | 2022-01-30 | 2022-05-24 | 山东高速工程建设集团有限公司 | FP (Fabry-Perot) complex-doped machine-made sand concrete with high stone powder content and production process thereof |
-
2020
- 2020-11-27 CN CN202011359765.6A patent/CN112408916A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185233A (en) * | 2021-05-17 | 2021-07-30 | 中国五冶集团有限公司 | Super-retarding concrete and preparation method thereof |
| CN113277802A (en) * | 2021-05-24 | 2021-08-20 | 杭州三中新型建材科技有限公司 | High-permeability concrete using recycled aggregate and preparation method thereof |
| CN113880533A (en) * | 2021-11-25 | 2022-01-04 | 十九冶成都建设有限公司 | Ultra-large volume concrete |
| CN114524645A (en) * | 2022-01-30 | 2022-05-24 | 山东高速工程建设集团有限公司 | FP (Fabry-Perot) complex-doped machine-made sand concrete with high stone powder content and production process thereof |
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Application publication date: 20210226 |