CN111943581A - Anti-crack concrete formula - Google Patents
Anti-crack concrete formula Download PDFInfo
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- CN111943581A CN111943581A CN202010561602.XA CN202010561602A CN111943581A CN 111943581 A CN111943581 A CN 111943581A CN 202010561602 A CN202010561602 A CN 202010561602A CN 111943581 A CN111943581 A CN 111943581A
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- sand
- crack
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- 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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/36—Bituminous materials, e.g. tar, pitch
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to an anti-crack concrete formula, which relates to the technical field of concrete raw materials and has the technical problems that the existing concrete is difficult to be fused with other materials tightly due to larger particle size of sand and stone in the formula material, so that fine gaps exist after the concrete is dried and formed easily, and the concrete is easy to crack once the fine gaps are subjected to external force; the composite material comprises the following raw materials in parts by weight: 100-120 parts of cement, 500-600 parts of ground sand, 50-60 parts of water and 5-10 parts of a water reducing agent. The invention has the effect of improving the crack resistance of the concrete.
Description
Technical Field
The invention relates to the technical field of concrete raw materials, in particular to a formula of anti-crack concrete.
Background
The common concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. Concrete is mainly divided into two stages and states: plastic state before setting and hardening, namely fresh concrete or concrete mixture; hardened, i.e. hardened concrete or concrete.
The prior patent application with publication number CN110105024A provides a common concrete, which comprises the following components in parts by mass: 13-17 parts of water; 18-22 parts of Portland cement; 10-15 parts of limestone powder; 100 portions and 105 portions of stone; 80-85 parts of sand; 0.5-1 part of fumed silica; 1-1.5 parts of gelatin; 2-2.5 parts of a water reducing agent; by adding the fumed silica, the water reducing agent and the gelatin, the consistency of the common concrete is improved, so that the bleeding phenomenon is not easy to occur in the mixing process of the common concrete for the sand and the stone, the density uniformity of the prepared common concrete is favorably improved, and the compressive strength of the common concrete is stronger.
The above prior art solutions have the following drawbacks: the existing concrete needs to be improved because the particle size of the sand is larger, the sand is difficult to be fused with other raw materials more tightly, and a small gap is easy to exist after the concrete is dried and formed, and the concrete is easy to crack once the small gap is subjected to external force.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an anti-cracking concrete formula which has the effect of improving the anti-cracking effect of concrete.
The above object of the present invention is achieved by the following technical solutions:
the formula of the anti-crack concrete comprises the following raw materials in parts by weight: 100-120 parts of cement, 500-600 parts of ground sand, 50-60 parts of water and 5-10 parts of a water reducing agent.
Through adopting above-mentioned technical scheme, because the particle diameter of grit is great, be difficult to comparatively inseparable with other raw materialss fuse, through the grit that has ground, reduce the particle diameter of grit itself for it can be inseparabler with the stirring of other raw materialss fuse, there is tiny clearance after reducing later stage concrete drying and shaping, thereby has improved the anti effect of splitting of concrete.
The present invention in a preferred example may be further configured to: the grinding sand comprises primary sand and high-grade sand, the particle size of the primary sand is 0.5-1mm continuous gradation, and the particle size of the high-grade sand is 0.1-0.4mm continuous gradation.
Through adopting above-mentioned technical scheme, carry out further restriction to the particle diameter of grinding the grit, adopt the grit of two kinds of different particle diameters to mix the use for grind other raw materialss of the better integration of grit can, thereby further improved the anti effect of splitting of concrete.
The present invention in a preferred example may be further configured to: the proportion of the primary sand and the high-grade sand is 1: 4-9.
Through adopting above-mentioned technical scheme, inject the proportion of elementary grit and senior grit to make the later stage workman when carrying out the material ratio to the concrete, have more accurate data, make things convenient for the batch production of later stage concrete.
The present invention in a preferred example may be further configured to: the proportion of the primary sand to the high-grade sand is 1: 7.
Through adopting above-mentioned technical scheme, specifically injecing the proportion of the primary grit in the grit of grinding and senior grit, there is tiny clearance after reducing later stage concrete drying and shaping to the feasible anti effect that splits that has further improved the concrete.
The present invention in a preferred example may be further configured to: and the grinding gravel is crushed and ground by adopting industrial crushed stones and is subjected to sieving treatment.
By adopting the technical scheme, the industrial broken stone is adopted as the raw material for grinding, so that the cost is favorably controlled.
The present invention in a preferred example may be further configured to: when the ground sandstone is subjected to screening treatment, firstly, high-grade sandstone is screened out through primary screening, then, primary sandstone is screened out through secondary screening, the insolation product is ground again, and the screening step is repeated.
Through adopting above-mentioned technical scheme, grind the back to the industry rubble, according to the different particle diameter scope of elementary grit and senior grit, sieve to in order to improve the utilization ratio of industry rubble, carry out secondary grinding and sieve and handle.
The present invention in a preferred example may be further configured to: the concrete also comprises the following raw materials, by weight, 10-20 parts of modified asphalt.
Through adopting above-mentioned technical scheme, modified asphalt itself has viscidity, can be better make the raw materials of concrete fuse together, reduce later stage concrete drying and shaping back and have tiny clearance to the anti effect of cracking of concrete has further been improved.
The present invention in a preferred example may be further configured to: the modified asphalt is one of styrene butadiene rubber modified asphalt, regenerated rubber modified asphalt and natural rubber modified asphalt.
By adopting the technical scheme, the reclaimed rubber modified asphalt is rubber powder prepared from waste tires, so that the service life of a pavement is prolonged, the noise is reduced, the vibration is reduced, the thermal stability and the thermal cracking property are improved, and the anti-icing property is improved;
the styrene butadiene rubber modified asphalt is a mixture of styrene butadiene rubber and asphalt, and 2-3% of styrene butadiene rubber is doped into the asphalt, so that the mixture still has an elastic deformation phenomenon at minus thirty degrees centigrade; and still has great intensity at zero degree centigrade;
the natural rubber modified asphalt is a mixture prepared from natural rubber and petroleum asphalt with good miscibility, and the modified asphalt has good thermal stability and small deformation at high temperature; the asphalt still has certain elasticity and plasticity at low temperature, and can avoid the brittleness and the cracking easily generated by common petroleum asphalt at low temperature.
The present invention in a preferred example may be further configured to: the cement is P.O42.5 ordinary portland cement.
By adopting the technical scheme, the mud is P.O42.5 ordinary portland cement, has moderate strength and is beneficial to controlling the cost.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the particle size of the sand is reduced through the ground sand, so that the sand can be more tightly mixed with other raw materials, and fine gaps existing after later-stage concrete drying and forming are reduced, so that the anti-cracking effect of the concrete is improved;
2. the modified asphalt has viscosity, so that the raw materials of the concrete can be better fused together, and the small gaps existing after the concrete is dried and formed in the later period are reduced, thereby further improving the anti-cracking effect of the concrete.
Detailed Description
The present invention will be described in further detail with reference to examples.
Examples
The raw materials for the crack-resistant concretes of examples 1 to 7 are shown in Table 1.
Table 1 is a raw material table (unit: kg) of the crack resistant concrete in examples 1 to 7:
TABLE 1
Wherein, the cement is P.O42.5 ordinary portland cement, the grain diameter of the primary sand stone is 0.5-1mm continuous gradation, the grain diameter of the high grade sand stone is 0.1-0.4mm continuous gradation, and the modified asphalt is preferably reclaimed rubber modified asphalt; and meanwhile, the ground sandstone is crushed and ground by adopting industrial macadam through a stone crusher and is subjected to sieving treatment, when the ground sandstone is subjected to sieving treatment, the high-grade sandstone is sieved out through first-stage sieving, the primary sandstone is sieved out through second-stage sieving, the insolation product is ground again, and the sieving step is repeated.
Comparative example
Comparative example 1: this comparative example differs from example 6 in that ordinary sand with a particle size of 2-5mm is used.
Comparative example 2: this comparative example differs from example 6 in that no modified asphalt was added.
Table 2 is a raw material table (unit: kg) of comparative examples 1-2:
TABLE 2
Performance detection
The properties of the concrete prepared in examples 1 to 7 and comparative examples 1 to 2 were measured by the following methods, and the results are shown in Table 3.
1. And (3) the anti-cracking performance is that a standard test block is manufactured according to GB/T50081-2016 standard of mechanical property test method of common concrete, and the number of cracks in unit area and the total cracking area in unit area are obtained by measuring after concrete is poured for 24 hours.
2. And (3) manufacturing a standard test block according to GB/T50081-2016 standard of mechanical property test method of common concrete, and measuring the compressive strength of the standard test block maintained for 1d, 7d and 28 d.
Table 3 shows the results of performance tests of the concretes prepared in examples 1 to 7 and comparative examples 1 to 2:
TABLE 3
According to the data in the table 3, the concrete prepared by the invention has greater advantages in crack resistance than the concrete prepared by the comparative example 1, and the concrete has greater advantages in compressive strength than the concrete prepared by the comparative example 1; the mixture of the primary sand and the high-grade sand has obvious improvement on the crack resistance and the compressive strength of the concrete compared with the common sand.
As can be seen from the data in Table 3, the anti-cracking performance of the concrete prepared by the invention is slightly superior to that of the comparative example 2, and the compressive strength of the concrete is slightly different from that of the comparative example 2; the effect of adding the modified asphalt on the improvement of the connectivity of the concrete raw material is shown.
As can be seen from the data in Table 3, the concrete of comparative example 3, example 6 and example 7 has the best anti-cracking performance and compressive strength when the ratio of the primary sand to the high-grade sand in the ground sand is 1: 7, while the raw material weight of the concrete is not changed and only the ratio of the primary sand to the high-grade sand in the ground sand is changed.
In conclusion, example 6 is a superior concrete, and the mixture of primary sand and high grade sand has significantly improved crack resistance and compressive strength compared to ordinary sand.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The anti-crack concrete formula is characterized by comprising the following raw materials in parts by weight: 100-120 parts of cement, 500-600 parts of ground sand, 50-60 parts of water and 5-10 parts of a water reducing agent.
2. The crack-resistant concrete formulation according to claim 1, wherein: the grinding sand comprises primary sand and high-grade sand, the particle size of the primary sand is 0.5-1mm continuous gradation, and the particle size of the high-grade sand is 0.1-0.4mm continuous gradation.
3. The crack-resistant concrete formulation according to claim 2, wherein: the proportion of the primary sand and the high-grade sand is 1: 4-9.
4. The crack-resistant concrete formulation according to claim 3, wherein: the proportion of the primary sand to the high-grade sand is 1: 7.
5. The crack-resistant concrete formulation according to claim 2, wherein: and the grinding gravel is crushed and ground by adopting industrial crushed stones and is subjected to sieving treatment.
6. The crack-resistant concrete formulation according to claim 5, wherein: when the ground sandstone is subjected to screening treatment, firstly, high-grade sandstone is screened out through primary screening, then, primary sandstone is screened out through secondary screening, the insolation product is ground again, and the screening step is repeated.
7. The crack-resistant concrete formulation according to claim 1, wherein: the concrete also comprises the following raw materials, by weight, 10-20 parts of modified asphalt.
8. The crack-resistant concrete formulation according to claim 7, wherein: the modified asphalt is one of styrene butadiene rubber modified asphalt, regenerated rubber modified asphalt and natural rubber modified asphalt.
9. The crack-resistant concrete formulation according to claim 1, wherein: the cement is P.O42.5 ordinary portland cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010561602.XA CN111943581A (en) | 2020-06-18 | 2020-06-18 | Anti-crack concrete formula |
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| CN202010561602.XA CN111943581A (en) | 2020-06-18 | 2020-06-18 | Anti-crack concrete formula |
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| CN111943581A true CN111943581A (en) | 2020-11-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113429180A (en) * | 2021-07-28 | 2021-09-24 | 太原鸿鑫景泰建材有限公司 | High-strength anti-crack concrete and preparation method thereof |
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2020
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| CN113429180A (en) * | 2021-07-28 | 2021-09-24 | 太原鸿鑫景泰建材有限公司 | High-strength anti-crack concrete and preparation method thereof |
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