CN113135712A - High-strength concrete and production process thereof - Google Patents
High-strength concrete and production process thereof Download PDFInfo
- Publication number
- CN113135712A CN113135712A CN202110534505.6A CN202110534505A CN113135712A CN 113135712 A CN113135712 A CN 113135712A CN 202110534505 A CN202110534505 A CN 202110534505A CN 113135712 A CN113135712 A CN 113135712A
- Authority
- CN
- China
- Prior art keywords
- water
- ceramsite
- concrete
- mixing
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1033—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application relates to the field of concrete, and particularly discloses high-strength concrete and a production process thereof. A high-strength concrete is prepared from the following raw materials: 910-1030 parts of sand: 520-620 parts of cement: 385-455 parts of fly ash: 125-155 parts of stirring water: 170-200 parts of an additive: 7-15 parts of water replenishing material: 190-270 parts of a water replenishing material, wherein the water replenishing material is formed by bonding a bonding material and steel fibers; the production process comprises the following steps: after mixing the stones and the sand, adding the powder prepared from the cement and the fly ash, the stirring water, the additive and the water supplement material into a concrete stirring tank at the same time, and stirring and mixing. The high-strength concrete has the advantages that the self-shrinkage cracking of the concrete in the early-strength process is effectively reduced; in addition, the production process has the advantages of simple preparation method and easy obtaining of finished products.
Description
Technical Field
The present application relates to the field of concrete, and more particularly, it relates to a high strength concrete and a process for producing the same.
Background
The high-strength concrete refers to concrete with the strength grade of C60 and above, and is prepared by adding water reducing agent or mixture into raw materials such as cement, sand, stone and the like and producing by a conventional process. The high-strength concrete is used as an energy-saving environment-friendly green building material, and is widely applied to high-rise building structures, large-span bridge structures and certain special structures due to the advantages of high compressive strength, strong deformation resistance, large density and low porosity.
In the related art, the Chinese patent application with publication number CN105819779AThe C60 level high strength recycled concrete is prepared by the following materials in proportion: silica fume: and (3) regenerating coarse aggregate: sand: water: the high-efficiency water reducing agent is (480-500): (25-55): (950-1100): (640-680): (175-190): (7 to 8) in units of kg/m3。
In view of the above-mentioned related art, the inventor believes that, in the related art, the cement addition amount is increased in order to improve the concrete strength, so that the cement-cement ratio in the concrete is reduced, and in the early strength process of a large-volume concrete building prepared by using the concrete, the concrete is self-shrunk and cracked, thereby causing potential safety hazards.
Disclosure of Invention
In order to reduce the self-shrinkage cracking of the concrete in the early-strength process, the application provides high-strength concrete and a production process thereof.
In a first aspect, the present application provides a high-strength concrete, which adopts the following technical scheme:
the high-strength concrete is prepared from the following raw materials in parts by weight: 910-1030 parts of sand: 520-620 parts of cement: 385-455 parts of fly ash: 125-155 parts of stirring water: 170-200 parts of an additive: 7-15 parts of water replenishing material: 61-109 parts of water replenishing material, wherein the water replenishing material is formed by bonding a bonding material and steel fibers, and the weight ratio of the bonding material to the steel fibers is (43-87): (18-22), the adhesive consists of ceramsite, water-absorbing resin, soaking water and coating adhesive, and the weight ratio of the ceramsite to the water-absorbing resin to the soaking water to the coating adhesive is (10-20): (25-45): (3-7): (5-15).
By adopting the technical scheme, after the ceramsite absorbs water, the water-absorbing resin is coated on the ceramsite, at the moment, the water-absorbing resin absorbs water to form hydrogel to seal holes on the ceramsite, so that water in the ceramsite is sealed for the first time, then the ceramsite and the hydrogel are protected by forming a protective layer outside the ceramsite by utilizing the coated adhesive, the damage of the hydrogel caused by the outside is reduced, meanwhile, the water in the ceramsite is sealed for the second time, the water storage effect is achieved, the bonding material is adhered to the surface of the steel fiber, the surface of the steel fiber is rough, the connection strength between each raw material of the concrete and the steel fiber is improved, when the concrete shrinks by itself, the bonding material is crushed by the extrusion of the concrete and the steel fiber, so that the water in the bonding material is released, the concrete is continuously maintained in a humid manner, and the self-shrinkage cracking in the early-strength process of mass concrete building is effectively reduced.
Preferably, the particle size D of the ceramsite90＝5～15mm。
By adopting the technical scheme, the grain size of the ceramsite is limited, so that the adhesion stability of the water-absorbent resin on the ceramsite is improved, and the condition that the bonding material falls off from the steel fiber in the stirring process is reduced.
Preferably, the coating adhesive is an unsaturated resin.
By adopting the technical scheme, the unsaturated resin is adhered to the outside of the hydrogel formed by the water-absorbing resin, and then is conveniently adhered to the steel fiber, so that the adhesive is combined with the steel fiber.
Preferably, the preparation method of the bonding material comprises the following steps: s1, mixing the ceramsite with the soaking water, wherein the water absorption time of the ceramsite is 3-6 h, and preparing the water storage ceramsite; s2, fishing out the water storage ceramsite from the water, and uniformly mixing the water storage ceramsite with water absorption resin to obtain a water storage material; s3, mixing the water storage material with unsaturated resin, filtering, and separating the water storage material adhered with the unsaturated resin from the unsaturated resin to obtain an adhesive material; and S4, mixing the bonding material with the steel fiber to obtain the water replenishing material.
By adopting the technical scheme, the water in the water storage ceramic particles is firstly sealed in the first stage, then the water storage ceramic particles are protected by the unsaturated resin, meanwhile, the water in the water storage ceramic particles is sealed in the second stage, and then the unsaturated resin bonds the water storage ceramic particles and the steel fibers, so that the water supplement material is formed, the operation is simple, and the finished product is easy to obtain.
Preferably, the ceramsite is extruded and crushed before being soaked in water to expose the internal structure of the ceramsite, and the ceramsite is screened.
By adopting the technical scheme, the honeycomb structure in the ceramsite is exposed, so that the water absorption rate of the ceramsite is effectively improved, and the adhesive strength of the water-absorbent resin and the unsaturated resin on the ceramsite is improved.
Preferably, the steel fibers are diamond-shaped steel fibers.
Through adopting above-mentioned technical scheme, there is the recess because of pressing the prismatic steel fiber surface, be favorable to unsaturated polyester resin on the one hand to adhere to the binder on the steel fiber, it is more even along with the steel fiber stirring in the concrete mixing process, on the other hand improves the bonding strength between each raw materials of concrete and the steel fiber, when the concrete shrinkages by oneself, each raw materials and steel fiber extrusion binder, thereby make the unsaturated polyester resin layer broken, the water in the retaining pottery granule outwards releases, thereby make the concrete in-process last moist maintenance earlier.
Preferably, the admixture comprises a water reducing agent and a pumping agent, and the weight ratio of the water reducing agent to the pumping agent is (5-10): (2-5).
By adopting the technical scheme, the fluidity of concrete is effectively improved, and the mixing uniformity of all raw materials is improved, so that the pumping performance of concrete is improved.
In a second aspect, the present application provides a production process of high-strength concrete, which adopts the following technical scheme, including the following steps: s1, uniformly stirring the cement and the fly ash to obtain powder; s2, mixing and conveying the stones and the sand, and conveying the water replenishing material, the powder, the additive and the water at the same time; and S3, uniformly stirring and mixing the raw materials to obtain the final product, namely the high-strength concrete.
By adopting the technical scheme, the prepared high-strength concrete is continuously subjected to moist curing through the bonding material in the early-strength process, so that the cement hydration degree in the concrete curing process is improved, the concrete cracking is reduced, the preparation method is simple, and the finished product is easy to obtain.
In summary, the present application has the following beneficial effects:
1. because this application adopts water-absorbing resin to seal the retaining haydite, and the unsaturated resin of rethread will be stained with water-absorbing resin's retaining haydite and steel fibre bonding to make the concrete in the early strong in-process, the unsaturated resin layer breaks and releases the water in the retaining haydite, thereby carries out the maintenance of continuously moistening to the concrete, effectively reduces the self-contraction fracture of bulky concrete construction early strong in-process.
2. In the application, the unsaturated resin is preferably adopted as the coating layer of the water storage ceramsite and is used as the adhesive between the water storage ceramsite and the steel fiber, and the unsaturated resin is low in solidification speed, so that the condition that the water storage ceramsite cannot be adhered to the steel fiber due to premature solidification of the coating adhesive in the preparation process is effectively reduced.
3. The utility model provides a pressing prismatic steel fiber's recess makes unsaturated polyester more easily with the water storage haydite adhere to steel fiber on, the recess more is favorable to each raw materials and steel fiber to extrude the breakage with unsaturated polyester layer when the concrete contracts certainly, more is favorable to the release of water in the haydite.
4. The water-absorbing resin releases water absorbed by the water-absorbing resin into concrete in the early-strength process of the concrete, so that cement hydration is promoted, water in the water-storing ceramsite is sucked out and continuously released, and the water releasing speed of the ceramsite is improved;
5. the inside honeycomb structure is exposed after the ceramsite is crushed, so that the water absorption of the ceramsite is improved, the influence of the ceramsite shell on the water absorption rate is effectively reduced, and meanwhile, the water-absorbent resin and the unsaturated resin are conveniently adhered to the ceramsite, so that the ceramsite is favorably adhered to the steel fibers;
6. by screening the grain size of the ceramsite, the situation that the unsaturated resin cannot effectively bond the ceramsite and the steel fiber due to the fact that the grain size of the ceramsite is too large is effectively reduced, and the situation that the bonding material cannot provide water required by sufficient maintenance to concrete due to the fact that the grain size of the ceramsite is too small and the water absorption performance is poor is reduced;
7. meanwhile, the stones, the sand, the powder, the admixture, the water and the water replenishing material are added into the concrete stirring tank, so that the components are mixed more uniformly.
Detailed Description
The stone is purchased from Changqing district Yongping stone material factories in Jinan City, the maximum nominal particle size is 30mm, the sand is medium sand sold by Shijiazhuangjinsheng mining industry Co., Ltd, the cement is P.O 42.5.5 cement self-produced by Lelingshan cement Co., Ltd, the fly ash is purchased from information source environment-friendly building materials Co., Ltd, the water reducing agent is purchased from Hanyi and Industrial Co Ltd in Pingtian City, the pumping agent is purchased from Hanyi and Industrial Co., Ltd, the ceramsite is purchased from Jinrui novel building material factories in Jinying City in Jinan City, the water absorbing resin is purchased from Guangdong Priman New Material science and technology Co., the unsaturated resin is vinyl resin purchased from Hebang Jiu anticorrosion Material Co., Ltd, the steel fiber is purchased from Yinhui county Silk products Co., Ltd, and the stirring water and the infiltrating water are purchased from Amelanchier tap water company.
The present application will be described in further detail with reference to examples.
Preparation example of Water-replenishing Material
Preparation example 1
S1, screening the ceramsite to obtain ceramsite with the particle size D90Mixing 10kg of ceramsite with 25kg of soaking water, and obtaining water storage ceramsite after the ceramsite absorbs water for 3 hours, wherein the size is 5 mm;
s2, fishing out the water storage ceramsite from the soaking water, and uniformly mixing the water storage ceramsite with 3kg of water absorption resin to obtain a water storage material;
s3, mixing the water storage material with 5kg of unsaturated resin, and filtering and separating the water storage material adhered with the unsaturated resin from the unsaturated resin to obtain a bonding material;
and S4, mixing the bonding material with 18kg of prism-shaped steel fibers to obtain the water replenishing material.
Preparation example 2
S1, screening the ceramsite to obtain ceramsite with the particle size D90Mixing 15kg of ceramsite with 25kg of soaking water, and obtaining water storage ceramsite after the ceramsite absorbs water for 4.5 hours, wherein the diameter is 10 mm;
s2, fishing out the water storage ceramsite from the soaking water, and uniformly mixing the water storage ceramsite with 5kg of water absorption resin to obtain a water storage material;
s3, mixing the water storage material with 10kg of unsaturated resin, and filtering and separating the water storage material adhered with the unsaturated resin from the unsaturated resin to obtain a bonding material;
and S4, mixing the bonding material with 20kg of prism-shaped steel fibers to obtain the water replenishing material.
Preparation example 3
S1, screening the ceramsite to obtain ceramsite with the particle size D90Mixing 20kg of ceramsite with 45kg of soaking water, and obtaining water storage ceramsite after the ceramsite absorbs water for 6 hours, wherein the diameter is 15 mm;
s2, fishing out the water storage ceramsite from the soaking water, and uniformly mixing the water storage ceramsite with 7kg of water absorption resin to obtain a water storage material;
s3, mixing the water storage material with 15kg of unsaturated resin, and filtering and separating the water storage material adhered with the unsaturated resin from the unsaturated resin to obtain a bonding material;
and S4, mixing the bonding material with 22kg of prism-shaped steel fibers to obtain the water replenishing material.
Preparation example 4
The difference from preparation example 2 is that the ceramsite is crushed before S1 to expose the internal structure.
Preparation example 5
The difference from preparation example 4 was that the water absorption time in S1 was 3 hours.
Preparation example 6
The difference from preparation example 5 is that straight steel fibers were selected in S4.
Preparation example 7
The difference from the preparation example 5 is that the grain diameter D of the ceramsite in S190＝50mm。
Preparation example 8
The difference from the preparation example 5 is that the grain diameter D of the ceramsite in S190＝1mm。
Preparation example 9
The difference from preparation example 2 is that the water absorption time in S1 was 1 hour.
Preparation example 10
S1, crushing the ceramsite to expose the internal structure, and then screening the ceramsite with the particle size D90Mixing 15kg of ceramsite with 35kg of soaking water, and obtaining water storage ceramsite after the ceramsite absorbs water for 3 hours, wherein the diameter is 10 mm;
s2, taking out the water storage ceramsite from the soaking water, mixing the water storage ceramsite with 5kg of unsaturated resin, and filtering and separating the water storage material adhered with the unsaturated resin from the unsaturated resin to obtain an adhesive material;
and S3, mixing the bonding material with 20kg of prism-shaped steel fibers to obtain the water replenishing material.
Preparation example 11
5kg of water-absorbing resin is mixed with 35kg of soaking water, the water-absorbing resin is fished out of the water after absorbing water for 3 hours and is mixed with 10kg of unsaturated resin, and the mixture is mixed with 20kg of prism-shaped steel fiber to prepare the water-supplementing material.
Preparation example 12
S1, crushing the ceramsite to expose the internal structure, and then screening the ceramsite with the particle size D90Mixing 15kg of ceramsite with 35kg of soaking water, and obtaining water storage ceramsite after the ceramsite absorbs water for 3 hours, wherein the diameter is 10 mm;
s2, fishing out the water storage ceramsite from the soaking water, and uniformly mixing the water storage ceramsite with 5kg of water absorption resin to obtain a water storage material;
s3, mixing the water storage material with 20kg of pressed prismatic steel fibers to obtain the water replenishing material.
Preparation example 13
S1, crushing the ceramsite to expose the internal structure, and then screening the ceramsite with the particle size D90Mixing 15kg of ceramsite with 35kg of soaking water, and obtaining water storage ceramsite after the ceramsite absorbs water for 3 hours, wherein the diameter is 10 mm;
s2, fishing out the water storage ceramsite from the soaking water, and uniformly mixing the water storage ceramsite with 5kg of water absorption resin to obtain a water storage material;
s3, mixing the water storage material with 10kg of unsaturated resin, and filtering and separating the water storage material adhered with the unsaturated resin from the unsaturated resin to obtain the water replenishing material.
Table 1 water supplement preparation example raw material data table
Examples
Example 1
S1, weighing 385kg of cement and 125kg of fly ash, and uniformly mixing to form powder;
s2, weighing 910kg of stones and 520kg of sand, mixing and conveying the stones and the 520kg of sand into a concrete stirring tank, and conveying the powder prepared in the step S1, 125kg of stirring water, 5kg of water reducing agent, 2kg of pumping aid and 61kg of water replenishing material prepared in the preparation example 1 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 2
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 61kg of water replenishing material prepared in the preparation example 2 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 3
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 2 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 4
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 109kg of water replenishing material prepared in the preparation example 2 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 5
S1, weighing 455kg of cement and 155kg of fly ash, and uniformly mixing to form powder;
s2, weighing 1030kg of stones and 620kg of sand, mixing and conveying the stones and the sand into a concrete stirring tank, and meanwhile conveying the powder prepared in the step S1, 155kg of stirring water, 10kg of water reducing agent, 5kg of pumping agent and 109kg of water replenishing material prepared in the preparation example 3 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 6
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 4 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 7
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 5 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 8
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 6 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 9
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 7 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Example 10
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 8 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Comparative example
Comparative example 1
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 9 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Comparative example 2
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 10 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Comparative example 3
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 11 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Comparative example 4
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 12 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Comparative example 5
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping agent and 85kg of water replenishing material prepared in the preparation example 13 into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Comparative example 6
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of stones and 570kg of sand, mixing and conveying the stones and the 570kg of sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent, 3.5kg of pumping aid and 85kg of prismatic steel fibers into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
Comparative example 7
S1, weighing 420kg of cement and 140kg of fly ash, and uniformly mixing to form powder;
s2, weighing 970kg of pebbles and 570kg of sand, mixing and conveying the pebbles and the sand into a concrete stirring tank, and conveying the powder prepared in the S1, 140kg of stirring water, 7.5kg of water reducing agent and 3.5kg of pumping agent into the concrete stirring tank;
and S3, uniformly stirring the raw materials to obtain the final product, namely the high-strength concrete.
TABLE 2 partial raw material data tables for examples 1-10 and comparative examples 1-7
Performance test
According to the compression strength test on page 125 of GB/T50081-2019 concrete physical and mechanical property test method Standard, the performance of the high-strength concrete prepared in the examples 1-10 and the comparative examples 1-5 is detected.
3 test pieces are arranged in each group of examples and comparative examples, the compressive strength of the test pieces after curing for 28 days is measured, the arithmetic mean value is taken as the final result, and the specific detection data are shown in Table 3.
According to the GB/T50082-2009 'test method standards for the long-term performance and durability of ordinary concrete' page 51 9 early crack resistance test, the performance of the high-strength concrete prepared in the examples 1-10 and the comparative examples 1-5 is detected.
Each set of the examples and the comparative examples is provided with 2 test pieces, the total cracking area per unit area after the test pieces are maintained for 28 days is measured, the arithmetic mean value is taken as the final result, and the specific detection data are shown in table 3.
TABLE 3 Table of data for testing the properties of each set of examples and comparative examples
It can be seen from a combination of comparative examples 6 and 7 and from Table 3 that the compressive strength of concrete can be effectively improved by adding steel fibers only to concrete, but not greatly contributing to the self-contraction cracking of concrete during early strength.
By combining example 7 and comparative example 5 with table 3, it can be seen that when the water storage material is bonded with the steel fiber through the unsaturated resin to participate in the concrete mixing, the compressive strength of the concrete is significantly improved, and the early strength and crack resistance of the concrete are significantly improved. The steel fiber plays a certain protection role on the unsaturated resin layer on the surface layer of the water storage material in the stirring process, so that the cracking of the unsaturated resin layer in the stirring process is reduced, the release of water in the water storage material in the stirring process is reduced, the water storage material can provide water in the early strength process of concrete, the self-shrinkage phenomenon of the concrete in the early process is effectively reduced, the generation of cracks is reduced, and the performance of the concrete is improved.
It can be seen from the combination of example 7 and comparative example 3 and table 3 that the lack of ceramsite as a carrier of the water-absorbent resin results in a low degree of mixing of the water-absorbent resin with the unsaturated resin and a poor effect of binding with the steel fiber, thereby resulting in direct mixing of the water-absorbent resin in the concrete without much help to improve the performance of the concrete.
In combination with example 7, comparative example 2, and comparative example 6, and in combination with table 3, it can be seen that the pores on the ceramsite are sealed due to the lack of the water-absorbent resin, so that water in the ceramsite is rapidly released, and the water-cement ratio is increased due to the fact that the water in the ceramsite enters the concrete during the stirring process, so that the strength of the concrete is reduced.
By combining the example 3, the example 6, the example 7 and the comparative example 1 and combining the table 3, it can be seen that the water absorption speed of the ceramsite can be effectively improved by crushing the ceramsite to expose the internal structure of the ceramsite, so that the production time is saved, and the production cost is reduced.
It can be seen from the combination of example 7 and example 8 and table 3 that, compared with the straight steel fiber, the prism-shaped steel fiber is easier to bond with the ceramsite on the first hand, and easier to mix with the concrete raw materials on the second hand, because of the grooves on the surface of the prism-shaped steel fiber, and when the concrete shrinks itself, the unsaturated resin layer is easier to be broken at the grooves on the third hand, so that the water in the ceramsite is released, and the self-shrinkage phenomenon of the concrete in the early strengthening process is reduced.
When the combination of example 7, example 9 and example 10 and table 3 shows that when the particle size of the ceramsite is too large, the bonding strength between the ceramsite and the steel fiber is insufficient, the unsaturated resin layer on the surface of the ceramsite is easily damaged during the stirring process, so that the water in the ceramsite is released before the water is extracted. When the particle size of the ceramsite is too small, two ends of a honeycomb-shaped hole in the ceramsite can be opened, and the water-absorbing resin has insufficient sealing capacity on the hole, so that the water storage capacity of the ceramsite is insufficient, and further, sufficient water cannot be provided for the concrete in an early strength manner.
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 (8)
1. The high-strength concrete is characterized by being prepared from the following raw materials in parts by weight: 910-1030 parts of sand: 520-620 parts of cement: 385-455 parts of fly ash: 125-155 parts of stirring water: 170-200 parts of an additive: 7-15 parts of water replenishing material: 61-109 parts of water replenishing material, wherein the water replenishing material is formed by bonding a bonding material and steel fibers, and the weight ratio of the bonding material to the steel fibers is (43-87): (18-22), the adhesive consists of ceramsite, water-absorbing resin, soaking water and coating adhesive, and the weight ratio of the ceramsite to the water-absorbing resin to the soaking water to the coating adhesive is (10-20): (25-45): (3-7): (5-15).
2. A high-strength concrete according to claim 1, characterized in that the ceramsite has a particle size D90=5～15mm。
3. A high strength concrete according to claim 2 wherein the coating binder is an unsaturated resin.
4. The high-strength concrete according to claim 3, wherein the binder preparation method comprises the following steps: s1, mixing the ceramsite with the soaking water, wherein the water absorption time of the ceramsite is 3-6 h, and preparing the water storage ceramsite; s2, fishing out the water storage ceramsite from the water, and uniformly mixing the water storage ceramsite with water absorption resin to obtain a water storage material; s3, mixing the water storage material with unsaturated resin, filtering, and separating the water storage material adhered with the unsaturated resin from the unsaturated resin to obtain an adhesive material; and S4, mixing the bonding material with the steel fiber to obtain the water replenishing material.
5. The high-strength concrete as claimed in claim 4, wherein the ceramsite is crushed to expose the internal structure of the ceramsite before being soaked in water, and the ceramsite is sieved.
6. A high strength concrete according to claim 4, wherein said steel fibres are pressed prismatic steel fibres.
7. A high strength concrete according to claim 1, wherein: the additive comprises a water reducing agent and a pumping agent, wherein the weight ratio of the water reducing agent to the pumping agent is (5-10): (2-5).
8. A process for the production of a high strength concrete according to any one of claims 1 to 7 comprising the steps of: s1, uniformly stirring the cement and the fly ash to obtain powder; s2, mixing and conveying the stones and the sand, and conveying the water replenishing material, the powder, the additive and the water at the same time; and S3, uniformly stirring and mixing the raw materials to obtain the final product, namely the high-strength concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534505.6A CN113135712B (en) | 2021-05-17 | 2021-05-17 | High-strength concrete and production process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534505.6A CN113135712B (en) | 2021-05-17 | 2021-05-17 | High-strength concrete and production process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113135712A true CN113135712A (en) | 2021-07-20 |
| CN113135712B CN113135712B (en) | 2022-06-24 |
Family
ID=76817198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110534505.6A Active CN113135712B (en) | 2021-05-17 | 2021-05-17 | High-strength concrete and production process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113135712B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231872A (en) * | 2022-07-19 | 2022-10-25 | 山东水总有限公司 | High-performance four-level concrete arch dam |
| CN116639897A (en) * | 2023-06-09 | 2023-08-25 | 安徽建筑大学 | Preparation method and preparation equipment of anti-cracking veneer ultra-high performance concrete |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129958A (en) * | 2014-07-24 | 2014-11-05 | 中交公路长大桥建设国家工程研究中心有限公司 | High-strength crack-resistant concrete material |
| CN109516714A (en) * | 2018-12-11 | 2019-03-26 | 中建商品混凝土有限公司 | A kind of ceramsite carrier concrete inner curing agent and preparation method thereof |
| CN112266195A (en) * | 2020-11-03 | 2021-01-26 | 山东省建筑科学研究院有限公司 | Closed saturated water internal curing lightweight aggregate and preparation method thereof |
| CN112299745A (en) * | 2020-10-23 | 2021-02-02 | 中建西部建设新疆有限公司 | Slow-release concrete curing agent and preparation method and application thereof |
-
2021
- 2021-05-17 CN CN202110534505.6A patent/CN113135712B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129958A (en) * | 2014-07-24 | 2014-11-05 | 中交公路长大桥建设国家工程研究中心有限公司 | High-strength crack-resistant concrete material |
| CN109516714A (en) * | 2018-12-11 | 2019-03-26 | 中建商品混凝土有限公司 | A kind of ceramsite carrier concrete inner curing agent and preparation method thereof |
| CN112299745A (en) * | 2020-10-23 | 2021-02-02 | 中建西部建设新疆有限公司 | Slow-release concrete curing agent and preparation method and application thereof |
| CN112266195A (en) * | 2020-11-03 | 2021-01-26 | 山东省建筑科学研究院有限公司 | Closed saturated water internal curing lightweight aggregate and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231872A (en) * | 2022-07-19 | 2022-10-25 | 山东水总有限公司 | High-performance four-level concrete arch dam |
| CN116639897A (en) * | 2023-06-09 | 2023-08-25 | 安徽建筑大学 | Preparation method and preparation equipment of anti-cracking veneer ultra-high performance concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113135712B (en) | 2022-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109650824B (en) | Recycled concrete and preparation method thereof | |
| CN103664094B (en) | A kind of lightweight aggregate concrete and preparation method thereof | |
| CN111039624A (en) | Recycled concrete and preparation method thereof | |
| CN113135712B (en) | High-strength concrete and production process thereof | |
| CN110526635A (en) | A kind of high-strength water-tight concrete and preparation method thereof | |
| Delvasto et al. | An appropriate vacuum technology for manufacture of corrugated fique fiber reinforced cementitious sheets | |
| CN108218319B (en) | Steel fiber polystyrene particle regenerated thermal insulation concrete and preparation method thereof | |
| CN101767960A (en) | Recycled concrete coarse aggregate modified processing method | |
| CN114230289B (en) | Green high-strength and high-toughness concrete and preparation process thereof | |
| CN107574733A (en) | A kind of imitative stone material water-permeable brick and preparation method thereof | |
| CN106116324B (en) | A kind of glass microballoon lightweight sound barrier and preparation method thereof | |
| CN111003991A (en) | Light high-strength silicate ceramsite concrete | |
| CN114477899B (en) | Light ceramic tile adhesive and preparation method thereof | |
| CN107572972A (en) | A kind of cement imitation wood and preparation method thereof | |
| CN103864373B (en) | A kind of preparation method of compound autoclave aerated concrete building block | |
| CN110963759B (en) | Impervious concrete with high mud content aggregate | |
| CN112430017B (en) | High-performance concrete prepared from waste materials and preparation method thereof | |
| CN102153319B (en) | Expanded perlite fine powder-polymer latex powder composite modified dry mortar | |
| CN114524643B (en) | Recycled concrete with excellent crack resistance and preparation method thereof | |
| CN115677300A (en) | High-strength environment-friendly concrete and preparation method thereof | |
| CN115180978A (en) | Composite slurry for anti-crack coating on back surface of large-plate ceramic tile and coating process | |
| CN111807784B (en) | Granite-like fiber cement board and preparation method and application thereof | |
| CN110606767B (en) | Lightweight aggregate concrete and preparation process thereof | |
| CN110642584A (en) | Light sound-insulation high-elasticity daub and preparation method thereof | |
| CN104016647B (en) | A kind of construction process of compound autoclave aerated concrete building block body of wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |