CN114213086A - Sesame-imitated marble precast concrete product and preparation method thereof - Google Patents
Sesame-imitated marble precast concrete product and preparation method thereof Download PDFInfo
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- CN114213086A CN114213086A CN202210029659.4A CN202210029659A CN114213086A CN 114213086 A CN114213086 A CN 114213086A CN 202210029659 A CN202210029659 A CN 202210029659A CN 114213086 A CN114213086 A CN 114213086A
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- 239000004579 marble Substances 0.000 title claims abstract description 59
- 239000011178 precast concrete Substances 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 238000004519 manufacturing process Methods 0.000 title description 6
- 241000207961 Sesamum Species 0.000 claims abstract description 48
- 235000003434 Sesamum indicum Nutrition 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 239000004575 stone Substances 0.000 claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims description 39
- 238000005422 blasting Methods 0.000 claims description 36
- 239000004567 concrete Substances 0.000 claims description 26
- 238000005520 cutting process Methods 0.000 claims description 23
- 238000011282 treatment Methods 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 18
- 238000001125 extrusion Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 2
- 239000002986 polymer concrete Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000010025 steaming Methods 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
-
- 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
- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B16/04—Macromolecular compounds
- C04B16/06—Macromolecular compounds fibrous
- C04B16/0616—Macromolecular compounds fibrous from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B16/0625—Polyalkenes, e.g. polyethylene
- C04B16/0633—Polypropylene
-
- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/54—Substitutes for natural stone, artistic materials or the like
- C04B2111/542—Artificial natural stone
-
- 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
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
-
- 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)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention relates to a sesame-imitated marble precast concrete product, which solves the technical problem of the existing method and is prepared by the following raw materials in parts by mass: 465-630 parts of white cement, 870-1050 parts of black colored sand, 290-370 parts of sesame white broken stone and 150-220 parts of water. The invention also provides a preparation method of the artificial sesame marble precast concrete product, and the artificial sesame marble precast concrete product is used in the field of preparation of the artificial sesame marble precast concrete product.
Description
Technical Field
The invention relates to a precast concrete product and a preparation method thereof, in particular to a sesame-imitated marble precast concrete product and a preparation method thereof.
Background
The natural stone sesame white marble is widely applied to paving of municipal sidewalks due to the advantages of uniform appearance, consistent appearance, high strength and hardness and the like, but the yield of sesame white marble products for paving municipal roads is obviously reduced along with the advocation of national environmental protection policies and the increasing shortage of natural stone resources in recent years.
The Chinese patent application with publication number CN112431085A discloses a method for constructing polymer concrete sesame-like white stone with easy maintenance, which comprises the following steps: step 1, mixing polymer concrete; step 2, transporting the polymer concrete; step 3, constructing an interface bonding waterproof layer; step 4, paving a polymer concrete surface layer; step 5, surface treatment; 6, sawing and sewing the polymer concrete sesame-imitated white stone; the polymer concrete sesame-like white stone has good integrity and flatness after being poured, is not easy to damage, has no loosening phenomenon after natural stone is paved, and has low later-stage maintenance cost.
However, the materials obtained by the above methods have the following problems:
1. step 3, construction of bonding the waterproof layer and step 5 of surface treatment both involve secondary construction of engineering, which results in increased production cost;
2. the process method is a cast-in-place process, and links such as concrete pouring, maintenance and the like are greatly influenced by factors such as construction environment, construction weather and the like;
3. the method is suitable for large-area overall engineering construction and is poor in flexibility.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a sesame-imitated marble precast concrete product and a preparation method thereof.
Therefore, the invention provides a sesame-imitated marble precast concrete product which is prepared from the following raw materials in parts by mass: 465-630 parts of P. W42.5R white cement, 870-1050 parts of black colored sand, 290-370 parts of sesame white crushed stone with the diameter of 3-5 mm and 150-220 parts of water. The white cement is P. W42.5R white cement produced by Arabic.
Preferably, the concrete further comprises 8-19 parts of JA-A type concrete surface compacting agent and 5-7 parts of anti-crack fibers. The anti-crack fiber is polypropylene fiber with the diameter of 9mm produced by Huaquan new material company, and the JA-A type concrete surface compacting agent is SILICONES SILRES BS 4004 type silicone concrete compacting agent produced by Germany Wake company.
Preferably, the diameter of the sesame white macadam is 3-5 mm; the particle size of the black colored sand is 40-120 meshes.
The invention also provides a preparation method of the sesame-imitated marble precast concrete product, which comprises the following steps: which comprises the following steps: (1) mixing and stirring the raw materials: preparing the following raw materials by mass: 465-630 parts of P. W42.5R white cement, 870-1050 parts of sand, 290-370 parts of sesame white macadam with the diameter of 3-5 mm, 150-220 parts of water, 8-19 parts of JA-A type concrete surface compacting agent and 5-7 parts of anti-cracking fiber, and placing the mixture into a stirring device for fully stirring, firstly pouring the sand, the sesame white macadam and the anti-cracking fiber into the stirring device, adding part of the water for stirring, after the mixture is uniformly mixed, adding the cement and the concrete surface compacting agent into the stirring device, adding the rest of the water for uniformly stirring, and ensuring that the fluidity of the mixture can meet the requirement of mold filling; in the mixing process, the addition of all the raw materials is accurately weighed by weighing software connected with a computer end, so that the matching accuracy and the uniform consistency of the appearance of a finished product are ensured; (2) vacuumizing, draining and extruding for forming: pouring the mixed raw materials into a pre-adjusted mould, pumping free water out of the mixture by using special vacuum-pumping equipment, and carrying out extrusion molding on the raw materials by using the pressure after vacuum pumping; (3) steam curing: demoulding the pressed and molded sesame white-imitated precast concrete product, and then performing steam curing treatment; (4) surface shot blasting: performing surface shot blasting treatment on the steamed sesame white-imitated precast concrete product to obtain a rough surface similar to sesame white marble; (5) cutting a finished product: and (3) cutting the finished product of the sesame white imitation precast concrete product after the surface is subjected to shot blasting treatment by using a special cutting saw for the precast concrete stone imitation product.
Preferably, in the step (1), the first water adding amount is 20-40% of the total water amount.
Preferably, in the step (5), the running speed of the cutting saw is 3 cm/s.
The invention has the following beneficial effects:
(1) the sesame-like marble precast concrete product prepared by the method has the advantages of consistent whole body, high simulation degree, no color difference, compactness and firmness, and meanwhile, the independently developed concrete compacting agent is added, so that the durability of the concrete product is greatly improved compared with that of common concrete, and the requirement for replacing natural sesame marble products is met.
(2) In the invention, in the process of mixing the raw materials, firstly, the sand, the sesame white macadam and the anti-cracking fibers are poured into a stirring device, part of water is added for stirring, after the materials are uniformly mixed, the cement and the concrete surface compacting agent are added into the stirring device, and the rest water is added for uniform stirring.
(3) Meanwhile, the sesame white marble-imitated precast concrete product is prepared by selecting sesame white broken stone waste materials, so that the waste natural stone is recycled.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The invention provides a preparation method of an imitation sesame white marble precast concrete product, which is prepared from the following raw materials in parts by mass: 465 parts of P. W42.5R white cement, 870 parts of black colored sand, 290 parts of sesame white crushed stone with the diameter of 3-5 mm, 150 parts of water, 8 parts of concrete surface compacting agent and 5 parts of anti-crack fiber.
The invention relates to a method for manufacturing an imitation sesame white marble precast concrete product, which comprises the following steps:
(1) mixing the raw materials under stirring
Firstly, pouring sand, sesame white macadam and anti-crack fibers into a stirring device, adding 30 parts of water for stirring, adding cement and concrete surface compacting agent into the stirring device after uniform mixing, adding the rest 120 parts of water, and uniformly stirring to ensure that the fluidity of the mixture can meet the requirement of mold filling, wherein the stirring time is 180 s.
(2) Vacuum pumping drainage extrusion forming
Pouring the mixed raw materials into a pre-adjusted mould, pumping free water out of the mixture by using special vacuumizing equipment, and carrying out extrusion forming on the raw materials by using the vacuumized pressure, wherein the specific extrusion forming parameters are as follows:
the molding temperature is 25 ℃;
the extrusion forming pressure intensity is 25 MPa;
the pressing time was 120 s.
(3) Steam curing
And (3) after demolding the press-molded sesame-imitated white marble precast concrete product, carrying out steam curing treatment, wherein the specific curing parameters are as follows:
the steam curing temperature is 60 ℃;
the steam curing humidity is 70%;
steaming for 4 h.
(4) Surface shot blasting
Performing surface shot blasting treatment on the steamed and cured sesame-imitation white marble precast concrete product to obtain a rough surface similar to the sesame white marble, wherein the specific shot blasting parameters are as follows:
the diameter of the steel shot is as follows: 1 mm;
the shot blasting speed is 50 m/s;
the advancing speed of the shot blasting machine is 2 cm/s.
(5) Cutting of finished products
And (3) cutting the finished product of the sesame-like white marble precast concrete product after the surface is subjected to shot blasting treatment by using a special cutting saw for the precast concrete stone-like product. The dicing saw was advanced at a speed of 3 cm/s.
Example 2
The invention provides a preparation method of an imitation sesame white marble precast concrete product, which is prepared from the following raw materials in parts by mass: 630 parts of P. W42.5R white cement, 1050 parts of black colored sand, 370 parts of sesame white crushed stone with the diameter of 3-5 mm, 220 parts of water, 19 parts of concrete surface compacting agent and 7 parts of anti-crack fiber.
The invention relates to a method for manufacturing an imitation sesame white marble precast concrete product, which comprises the following steps:
(1) mixing the raw materials under stirring
Firstly, pouring sand, sesame white macadam and anti-crack fibers into a stirring device, adding 66 parts of water for stirring, adding cement and concrete surface compacting agent into the stirring device after uniform mixing, adding the rest water, and uniformly stirring to ensure that the fluidity of the mixture can meet the requirement of mold filling, wherein the stirring time is 180 s.
(2) Vacuum pumping drainage extrusion forming
Pouring the mixed raw materials into a pre-adjusted mould, pumping free water out of the mixture by using special vacuumizing equipment, and carrying out extrusion forming on the raw materials by using the vacuumized pressure, wherein the specific extrusion forming parameters are as follows:
the molding temperature is 25 ℃;
the extrusion forming pressure intensity is 25 MPa;
the pressing time was 120 s.
(3) Steam curing
And (3) after demolding the press-molded sesame-imitated white marble precast concrete product, carrying out steam curing treatment, wherein the specific curing parameters are as follows:
the steam curing temperature is 60 ℃;
the steam curing humidity is 70%;
steaming for 4 h.
(4) Surface shot blasting
Performing surface shot blasting treatment on the steamed and cured sesame-imitation white marble precast concrete product to obtain a rough surface similar to the sesame white marble, wherein the specific shot blasting parameters are as follows:
the diameter of the steel shot is as follows: 1 mm;
the shot blasting speed is 50 m/s;
the advancing speed of the shot blasting machine is 2 cm/s.
(5) Cutting of finished products
And (3) cutting the finished product of the sesame-like white marble precast concrete product after the surface is subjected to shot blasting treatment by using a special cutting saw for the precast concrete stone-like product. The dicing saw was advanced at a speed of 3 cm/s.
Example 3
The invention provides a preparation method of an imitation sesame white marble precast concrete product, which is prepared from the following raw materials in parts by mass: 513 parts of P. W42.5R white cement, 970 parts of black colored sand, 305 parts of sesame white crushed stone with the diameter of 3-5 mm, 180 parts of water, 12 parts of concrete surface compacting agent and 6 parts of anti-crack fiber.
The invention relates to a method for manufacturing an imitation sesame white marble precast concrete product, which comprises the following steps:
(1) mixing the raw materials under stirring
Firstly, pouring sand, sesame white macadam and anti-crack fibers into a stirring device, adding 72 parts of water for stirring, adding cement and concrete surface compacting agent into the stirring device after uniform mixing, adding the rest water, and uniformly stirring to ensure that the fluidity of the mixture can meet the requirement of mold filling, wherein the stirring time is 180 s.
(2) Vacuum pumping drainage extrusion forming
Pouring the mixed raw materials into a pre-adjusted mould, pumping free water out of the mixture by using special vacuumizing equipment, and carrying out extrusion forming on the raw materials by using the vacuumized pressure, wherein the specific extrusion forming parameters are as follows:
the molding temperature is 25 ℃;
the extrusion forming pressure intensity is 25 MPa;
the pressing time was 120 s.
(3) Steam curing
And (3) after demolding the press-molded sesame-imitated white marble precast concrete product, carrying out steam curing treatment, wherein the specific curing parameters are as follows:
the steam curing temperature is 60 ℃;
the steam curing humidity is 70%;
steaming for 4 h.
(4) Surface shot blasting
Performing surface shot blasting treatment on the steamed and cured sesame-imitation white marble precast concrete product to obtain a rough surface similar to the sesame white marble, wherein the specific shot blasting parameters are as follows:
the diameter of the steel shot is as follows: 1 mm;
the shot blasting speed is 50 m/s;
the advancing speed of the shot blasting machine is 2 cm/s.
(5) Cutting of finished products
And (3) cutting the finished product of the sesame-like white marble precast concrete product after the surface is subjected to shot blasting treatment by using a special cutting saw for the precast concrete stone-like product. The dicing saw was advanced at a speed of 3 cm/s.
Comparative example 1
A preparation method of an imitated sesame white marble precast concrete product is prepared from the following raw materials in parts by mass: 465 parts of P. W42.5R white cement, 870 parts of black colored sand, 290 parts of sesame white crushed stone with the diameter of 3-5 mm, 150 parts of water and 5 parts of anti-crack fiber.
The making process of prefabricated sesame imitation marble concrete product includes the following steps: (1) firstly, pouring sand, sesame white macadam and anti-crack fibers into a stirring device, adding water for stirring, after the sand, the sesame white macadam and the anti-crack fibers are uniformly mixed, adding cement and a concrete surface compacting agent into the stirring device, adding the rest water for uniformly stirring, and enabling the fluidity of a mixture to meet the requirement of mold filling, wherein the stirring time is 180 s. (2) vacuumizing, draining and extruding and forming: pouring the mixed raw materials into a pre-adjusted mould, pumping free water out of the mixture by using special vacuumizing equipment, and carrying out extrusion forming on the raw materials by using the vacuumized pressure, wherein the specific extrusion forming parameters are as follows: the molding temperature is 25 ℃; the extrusion forming pressure intensity is 25 MPa; the pressing time was 120 s. (3) Steam curing: and (3) after demolding the press-molded sesame-imitated white marble precast concrete product, carrying out steam curing treatment, wherein the specific curing parameters are as follows: the steam curing temperature is 60 ℃; the steam curing humidity is 70%; steaming for 4 h. (4) surface shot blasting: performing surface shot blasting treatment on the steamed and cured sesame-imitation white marble precast concrete product to obtain a rough surface similar to the sesame white marble, wherein the specific shot blasting parameters are as follows: the diameter of the steel shot is as follows: 1 mm; the shot blasting speed is 50 m/s; the advancing speed of the shot blasting machine is 2 cm/s. (5) Cutting a finished product: and (3) cutting the finished product of the sesame-like white marble precast concrete product after the surface is subjected to shot blasting treatment by using a special cutting saw for the precast concrete stone-like product. The dicing saw was advanced at a speed of 3 cm/s.
Comparative example 2
The polymer concrete sesame-like white stone material of the chinese invention patent application with publication number CN112431085A was used as a comparative example, and the following treatments were performed:
(1) surface shot blasting
Performing surface shot blasting treatment on the polymer concrete sesame-like white stone to obtain a rough surface with a surface similar to that of examples 1-3, wherein specific shot blasting parameters are as follows:
the diameter of the steel shot is as follows: 1 mm;
the shot blasting speed is 50 m/s;
the advancing speed of the shot blasting machine is 2 cm/s.
(2) Cutting of finished products
And cutting the finished product of the polymer concrete sesame-imitated white stone with the surface subjected to the shot blasting treatment by using a special cutting saw for the precast concrete sesame-imitated product. The dicing saw was advanced at a speed of 3 cm/s.
Table 1: price comparison
The price of the prepared sesame-like marble precast concrete product is lower than that of natural sesame marble, and the specific price is shown in Table 1:
TABLE 1
| Species of | Price (Yuan/m)3) |
| Natural sesame marble product | 5500 |
| Sesame-imitated white marble precast concrete product | 4000 |
| Polymer concrete sesame-imitated white stone | 4400 |
Table 2: performance characterization of examples 1-3 and comparative examples 1-2
With reference to the relevant detection methods and detection standards in GB/T28635-2012 concrete pavement bricks, the abrasion resistance, compressive strength, flexural strength and salt freezing resistance of the sesame-like white marble precast concrete products and the polymer concrete sesame-like white stone materials related to the embodiments 1-3 and the comparative examples 1-2 of the present invention are detected, and the results are shown in the table above.
According to the detection results, the sesame-imitation marble precast concrete product has the same appearance as natural sesame marble, and all the detection results show that the prepared three sesame-imitation marble precast concrete products can meet the related requirements of the concrete pavement brick for paving municipal roads in terms of mechanical properties, and meanwhile, the concrete compacting agent is added to ensure that the concrete pavement brick has excellent salt freezing resistance. The comparative examples 1 to 2 also have better abrasion resistance and mechanical properties, but the salt freezing resistance is inferior to those of examples 1 to 3. The specification of the finished product of the sesame-imitated marble precast concrete product can be flexibly adjusted according to the design requirement, and the product can be popularized and used in the field of municipal road pavement as a substitute product of a natural sesame marble product.
However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.
Claims (6)
1. The sesame-imitated marble precast concrete product is characterized by being prepared from the following raw materials in parts by weight: 465-630 parts of white cement, 870-1050 parts of black colored sand, 290-370 parts of sesame white broken stone and 150-220 parts of water.
2. The sesame-imitated marble precast concrete product of claim 1, wherein the raw materials further comprise 8-19 parts of a concrete surface compacting agent and 5-7 parts of an anti-crack fiber.
3. The sesame-imitated white marble precast concrete product of claim 1, wherein the diameter of the sesame white macadam is 3-5 mm; the particle size of the black colored sand is 40-120 meshes.
4. The method for preparing the sesame-imitated marble precast concrete product as set forth in claim 2, which is characterized by comprising the following steps:
(1) mixing and stirring raw materials: preparing the following raw materials by mass: 465-630 parts of white cement, 870-1050 parts of sand, 290-370 parts of sesame white macadam with the diameter of 3-5 mm, 150-220 parts of water, 8-19 parts of concrete surface compacting agent and 5-7 parts of anti-crack fiber; firstly, pouring sand, sesame white macadam and anti-crack fibers into a stirring device, adding part of water for stirring, adding cement and a concrete surface compacting agent into the stirring device after uniform mixing, adding the rest water, and uniformly stirring to ensure that the fluidity of a mixture can meet the requirement of mold filling;
(2) vacuumizing, draining and extruding for forming: pouring the mixed raw materials into a pre-adjusted mould, pumping free water out of the mixture by using vacuumized equipment, and carrying out extrusion forming on the raw materials by using the vacuumized pressure;
(3) steam curing: carrying out steam curing treatment after demoulding treatment on the press-formed sesame-imitated white marble precast concrete product;
(4) surface shot blasting: performing surface shot blasting treatment on the steamed and cured sesame-imitation white marble precast concrete product to obtain a rough surface similar to the sesame white marble;
(5) cutting a finished product: and (3) cutting the finished product of the sesame-like white marble precast concrete product after the surface is subjected to shot blasting treatment by using a special cutting saw for the precast concrete stone-like product.
5. The method for preparing the sesame-imitated marble precast concrete product according to claim 4, wherein in the step (1), the first water addition amount is 20-40% of the total water amount.
6. The method for preparing the sesame-imitated marble precast concrete product according to claim 4, wherein in the step (5), the cutting saw is moved at a speed of 3 cm/s.
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