CN115504734A - Manufacturing method of imitated white marble high-finish fiber reinforced concrete slab - Google Patents
Manufacturing method of imitated white marble high-finish fiber reinforced concrete slab Download PDFInfo
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- CN115504734A CN115504734A CN202211064438.7A CN202211064438A CN115504734A CN 115504734 A CN115504734 A CN 115504734A CN 202211064438 A CN202211064438 A CN 202211064438A CN 115504734 A CN115504734 A CN 115504734A
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
-
- 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
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/82—Coloured 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a manufacturing method of a high-finish fiber reinforced concrete slab imitating white marble, which relates to the technical field of architectural decoration, the product of the invention has high bending strength, excellent toughness is obtained by the reinforcing effect of a plurality of layers of directional alkali-resistant glass fiber felts, and the bending strength reaches more than 25MPa and is much higher than the bending strength of natural white marble by 19MPa; the product has high surface glossiness which is more than 90 GU; the permeability effect of the surface like white marble is realized by doping the anti-reflection polymer into the product, and the precipitation of alkali is inhibited at the same time, so that the surface gloss and durability of the product are excellent.
Description
The technical field is as follows:
the invention relates to the technical field of architectural decoration, in particular to a manufacturing method of a white marble-imitated high-finish fiber reinforced concrete slab.
Background art:
the natural white marble stone belongs to rare stone, the price is high, the natural white marble stone has less stone, and the white marble stone with large area is particularly rare. The artificial white marble in the market is mainly made of organic resin materials and is mainly applied to indoor decoration, and the durability of the artificial white marble applied to the outer wall of a building can not meet the requirement.
The white marble-imitated concrete material is a high-grade expression form of decorative concrete and is the effect of decorative concrete pursuit. The white marble-like effect has poor gloss durability, can keep good effect in an indoor environment, but is often influenced by exposure to the sun and rain in an outdoor environment, alkaline substances or alkaline hydration products in a cement base material can be separated out to the surface of a product to form white powdery crystals, so that the gloss can be greatly reduced or even disappear. Solving the problem is a technical problem which puzzles technicians in the field for a long time, and no real high-gloss decorative concrete product is applied to the market so far.
The invention content is as follows:
the invention aims to provide a manufacturing method of a white marble-imitated high-finish fiber reinforced concrete plate, which realizes the penetrating effect of the surface of the concrete plate like white marble and has high bending strength and surface finish.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
one of the purposes of the invention is to provide a manufacturing method of a white marble-imitated high-finish fiber reinforced concrete plate, which comprises the following steps:
(1) Spraying a release agent into the mold, drying and curing, and then polishing the surface;
(2) The materials by weight: 30-40 parts of white silicate cement, 35-40 parts of white silica sand, 3-5 parts of white calcined metakaolin, 1-1.5 parts of POM (polyoxymethylene) fibers, 2-3 parts of a water reducing agent, 4-10 parts of an anti-reflection polymer, 3-5 parts of titanium dioxide and 10-15 parts of water, and stirring to form mixed slurry;
(3) Spraying a layer of mixed slurry into the mould by using a mortar spraying gun, and then moving the mould into a vacuum box for negative pressure treatment;
(4) Laying an alkali-resistant glass fiber felt layer after negative pressure treatment, rolling by using a roller, spraying a layer of mixed slurry, laying an alkali-resistant glass fiber felt layer, repeating the operation, laying an alkali-resistant glass fiber mesh cloth layer, compacting and finishing the surface;
(5) Covering with a bubble film for protection, curing the product in a steam curing room after curing, transferring to a dry-heat curing room for curing, slowly cooling to normal temperature, and demolding;
(6) Spraying a protective agent on the surface of a product;
(7) And a protective film is wrapped to prevent the product from being polluted in the process of carrying or installing.
Preferably, the mould is made of white glass, steel mould, baking varnish wood mould or glass steel mould, and the surface gloss of the mould is above 100GU. An important step in the production of concrete panels with a high finish is the high gloss mirror finish of the mould surface.
Preferably, the whiteness of the white portland cement is above 90 degrees.
Preferably, the white calcined metakaolin is high-activity kaolin calcined at a low temperature, and the calcination temperature is 670-800 ℃.
Preferably, the titanium dioxide is hydrophilic titanium dioxide.
Preferably, the anti-reflection polymer consists of the following raw materials in parts by weight: 73 parts of acrylic emulsion, 2 parts of attapulgite, 4 parts of glass beads, 1 part of amorphous active fumed silica nano powder and 20 parts of water.
The resin in the anti-reflection polymer can fill pores of a cement matrix material to prevent alkali from permeating along the surface of the material pores, and the active amorphous nano silicon oxide filled in the resin can react with the alkali of hydration reaction to generate an inorganic bonding material calcium silicate hydrate; meanwhile, the light transmittance of the resin can enable the surface of the product to have a glittering and translucent gloss effect.
Further preferably, the glass beads are hollow glass beads.
In the invention, the attapulgite is used as a filler, a thixotropic material, a thickening agent and a stabilizing agent, and has good gloss performance.
In the invention, bubbles in the slurry are eliminated through negative pressure treatment, and the compactness of the slurry is ensured.
Preferably, the glass fiber felt and the glass fiber mesh cloth are alkali-resistant glass fiber felt and glass fiber mesh cloth, and the content of zirconium oxide is more than 16.5%.
Preferably, the temperature of the steam curing room is 40-50 ℃, and the humidity is 90-98%.
Preferably, the temperature of the dry thermal curing chamber is 90-95 ℃.
Preferably, the repellent is an osmotic silicone repellent.
The invention also aims to provide the imitated white marble high-finish fiber reinforced concrete slab manufactured by the manufacturing method.
The invention has the beneficial effects that:
1) The product of the invention has high bending strength, excellent toughness is obtained by the reinforcing effect of the multilayer directional alkali-resistant glass fiber felt, and the bending strength reaches more than 25MPa and is much higher than the bending strength of natural white marble by 19MPa.
2) The product of the invention has high surface smoothness, and the surface glossiness is more than 90 GU.
3) The invention realizes the penetrating effect of the surface like white marble by doping the anti-reflection polymer into the product, and simultaneously inhibits the precipitation of alkali, so that the surface gloss and durability of the product are excellent.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Sources of the raw materials in the following examples:
the mold release agent is a Kentungtian PMR-EZ mold release agent, has good heat resistance which can reach 400 ℃, and can form an ultrathin and tough protective film on the surface of a mold.
The white portland cement is type 52.5 white portland cement.
The production place of the white silica sand is Anhui Lingshou county, and the fineness is 20-40 meshes.
The white calcined metakaolin is white calcined metakaolin of inner Mongolia super brand Limited company, and the average particle size is 1250 meshes.
POM fibers (polyoxymethylene fibers) were from chongqing yunnan chemical limited.
The water reducing agent is polycarboxylate high-efficiency powder water reducing agent 530P of Swiss Cao.
The acrylic emulsion is semitransparent water-based acrylic emulsion E-1246 of Guangzhou timely rain company, the solid content is more than 48 percent, and the content of transparent polymethyl methacrylate resin in the polymer is 80 percent.
The amorphous active gas phase silicon dioxide nano powder is hydrophilic gas phase method silicon dioxide Wacker T40.
The glass beads are hollow glass beads VS5500 of 3M company in the United states.
The attapulgite is attapulgite FZ30 of New Material Co., ltd.
Titanium dioxide is R-706 rutile type titanium dioxide from DuPont of America.
The protective agent is an osmotic siloxane protective agent BS4004 of German Wake company.
Preparation of antireflective photopolymer: adding 20 parts of water into a stirring barrel, setting the stirring speed to be 800r/min, adding 1 part of amorphous active fumed silica nano powder, stirring for 2min, adding 2 parts of attapulgite, stirring for 2min, gradually increasing the stirring speed to 5000r/min, stirring at a high speed for 2min, reducing the stirring speed to 1000r/min, then adding 4 parts of glass beads and 73 parts of acrylic emulsion, stirring for 2min, and barreling for later use.
Example 1
(1) Preparing white glass mold with smooth surface, wherein the surface gloss is more than 100GU.
(2) And (3) spraying a release agent into the mold, drying and curing for 1h, and then polishing the surface by using an electric wool disc.
(3) The materials by weight: 35 parts of white silicate cement, 35 parts of white silica sand, 5 parts of white calcined metakaolin, 1 part of POM fiber, 3 parts of water reducing agent, 4 parts of anti-reflection polymer, 4 parts of titanium pigment and 13 parts of water, and stirring the mixture by using a high-speed stirrer to form mixed slurry.
(4) And spraying mixed slurry with the thickness of 5mm into the mold by using a mortar spraying gun, then moving the mold into a vacuum box, and treating the mold for 10min under the negative pressure of 0.8MPa to eliminate bubbles and ensure the compactness of the surface layer slurry.
(5) Laying a layer of alkali-resistant glass fiber felt after negative pressure treatment, rolling by using a roller, spraying slurry with the thickness of 5mm, laying a layer of glass fiber felt, repeatedly operating 5 layers (spraying slurry with the thickness of 5mm and laying an alkali-resistant glass fiber felt), laying a layer of glass fiber mesh cloth, compacting and smoothing the surface;
(6) Covering with a bubble film for protection for 24h, then performing steam curing for 12h, performing dry heat curing for 12h, cooling to normal temperature, and demolding.
(7) Spraying a permeable siloxane protective agent.
(8) After the protective agent is sprayed for 24 hours, the protective agent is wrapped by a protective film, so that pollution in the process of carrying or installing is prevented.
Example 2
(1) Preparing a glass fiber reinforced plastic mold with a smooth surface, wherein the surface gloss is more than 100GU.
(2) And (3) spraying a release agent into the mold, drying and curing for 1h, and then polishing the surface of the mold by using an electric wool disc.
(3) Preparing the following materials by weight: 33 parts of white silicate cement, 37 parts of white silica sand, 3.5 parts of white calcined metakaolin, 1.5 parts of POM fiber, 2 parts of water reducing agent, 8 parts of anti-reflection polymer, 5 parts of titanium dioxide and 15 parts of water, and stirring the mixture by using a high-speed stirrer to form mixed slurry.
(4) And spraying mixed slurry with the thickness of 5mm into the mold by using a mortar spraying gun, then moving the mold into a vacuum box, and treating the mold for 10min under the negative pressure of 0.8MPa to eliminate bubbles and ensure the compactness of the surface layer slurry.
(5) Laying an alkali-resistant glass fiber mat layer after negative pressure treatment, rolling by using a roller, spraying slurry with the thickness of 5mm, laying a glass fiber mat layer, repeatedly operating 5 layers (spraying slurry with the thickness of 5mm and laying an alkali-resistant glass fiber mat layer), laying an alkali-resistant glass fiber mesh cloth layer, compacting and smoothing the surface;
(6) Covering with a bubble film for protection for 24h, then performing steam curing for 12h, performing dry heat curing for 12h, cooling to normal temperature, and demolding.
(7) And spraying a permeable siloxane protective agent.
(8) After the protective agent is sprayed for 24 hours, the protective agent is wrapped by a protective film to prevent pollution in the process of carrying or installing.
Example 3
(1) Preparing a baking varnish wood mould with a smooth surface, wherein the surface gloss is more than 100GU.
(2) And (3) spraying a release agent into the mold, drying and curing for 1h, and then polishing the surface by using an electric wool disc.
(3) Preparing the following materials by weight: 40 parts of white silicate cement, 30 parts of white silica sand, 4 parts of white calcined metakaolin, 1 part of POM fiber, 3 parts of water reducing agent, 8 parts of anti-reflection polymer, 3 parts of titanium dioxide and 11 parts of water, and stirring the mixture by using a high-speed stirrer to form mixed slurry.
(4) And spraying mixed slurry with the thickness of 4mm into the mold by using a mortar spraying gun, then moving the mold into a vacuum box, and treating the mold for 10min under the negative pressure of 0.8MPa to eliminate bubbles and ensure the compactness of the surface layer slurry.
(5) Laying an alkali-resistant glass fiber mat layer after negative pressure treatment, rolling by using a roller, spraying slurry with the thickness of 3mm, laying a glass fiber mat layer, repeatedly operating for 6 layers (spraying slurry with the thickness of 3mm and laying an alkali-resistant glass fiber mat layer), laying an alkali-resistant glass fiber mesh cloth layer, compacting and smoothing the surface;
(6) Covering with a bubble film for protection for 24h, then performing steam curing for 10h, performing dry heat curing for 12h, cooling to normal temperature, and demolding.
(7) Spraying a permeable siloxane protective agent.
(8) After the protective agent is sprayed for 24 hours, the protective agent is wrapped by a protective film, so that pollution in the process of carrying or installing is prevented.
Comparative example 1
The concrete slab of comparative example 1 was made in the same manner as in example 3 except that the same amount of acrylic emulsion was added instead of the anti-reflective photopolymer when the mixed slurry was prepared in step (3).
Comparative example 2
The concrete slab of comparative example 2 was manufactured in the same manner as in example 3 except that the negative pressure treatment was not performed after spraying the mixed slurry in step (4).
Comparative example 3
Comparative example 3 is a method of manufacturing a hanbaiyu-imitating fiber reinforced concrete panel, which is conventional in the art.
(1) Preparing a baking varnish wood mould with a smooth surface, wherein the surface gloss is more than 100GU.
(2) And (3) spraying a release agent into the mold, drying and curing for 1h, and then polishing the surface of the mold by using an electric wool disc.
(3) Preparing the following materials by weight: 40 parts of white silicate cement, 40 parts of white silica sand, 3 parts of a water reducing agent and 17 parts of water, and stirring the mixture by using a high-speed stirrer to form mixed slurry.
(4) A mortar spray gun was used to spray the mixed slurry with a thickness of 4mm into the mold.
(5) And (3) waiting for 10-20min, the surface layer slurry loses fluidity, spraying the slurry by using a special spray gun for glass fiber reinforced concrete and spraying fibers into the mold, rolling the fibers once when the fibers are sprayed by about 10mm, and finishing the back when the thickness of the product reaches 25 mm.
(6) And demolding after natural curing for 24 hours.
(7) And (4) curing for 2 days under natural conditions after demolding, and spraying the permeable siloxane protective agent after the surface of the product is dried.
Performance test
The gloss, flexural strength and water absorption of the concrete panels produced in the above examples and comparative examples were respectively tested and the results are shown in table 1.
TABLE 1
| gloss/GU | Bending strength/Mpa | Water absorption/%) | |
| Example 1 | 94 | 25 | 1.0 |
| Example 2 | 92 | 26 | 1.2 |
| Example 3 | 93 | 28 | 0.9 |
| Comparative example 1 | 52 | 25 | 2 |
| Comparative example 2 | 49 | 25 | 7 |
| Comparative example 3 | 46 | 17 | 10 |
Gloss test standard: GB/T8807 method for testing mirror surface glossiness of plastics
And (4) the bending strength test standard is as follows: GB/T15231-2008 glass fiber reinforced cement performance test method
Water absorption test standard: GB/T15231-2008 glass fiber reinforced cement performance test method
The gloss referred to above is the gloss measured after 25 freeze-thaw cycles.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A manufacturing method of a white marble-imitated high-finish fiber reinforced concrete slab is characterized by comprising the following steps of:
(1) Spraying a release agent into the mold, drying and curing, and then polishing the surface;
(2) Preparing the following materials by weight: 30-40 parts of white silicate cement, 35-40 parts of white silica sand, 3-5 parts of white calcined metakaolin, 1-1.5 parts of POM (polyoxymethylene) fiber, 2-3 parts of water reducing agent, 4-10 parts of anti-reflection polymer, 3-5 parts of titanium dioxide and 10-15 parts of water, and stirring to form mixed slurry;
(3) Spraying a layer of mixed slurry into the mold by using a mortar spraying gun, and then moving the mold into a vacuum box for negative pressure treatment;
(4) Laying a layer of alkali-resistant glass fiber felt after negative pressure treatment, rolling by using a roller, spraying a layer of mixed slurry, laying a layer of alkali-resistant glass fiber felt, repeating the operation, laying a layer of alkali-resistant glass fiber mesh cloth, compacting and smoothing the surface;
(5) Covering with a bubble film for protection, curing the product in a steam curing room after curing, transferring to a dry-heat curing room for curing, slowly cooling to normal temperature, and demolding;
(6) Spraying a protective agent on the surface of a product;
(7) And a protective film is wrapped to prevent the product from being polluted in the process of carrying or installing.
2. The method of manufacturing of claim 1, wherein: the mould is made of white glass, steel mould, baking varnish wood mould or glass steel mould, and the surface glossiness of the mould is more than 100GU.
3. The method of manufacturing of claim 1, wherein: the whiteness of the white portland cement is above 90 degrees; the titanium dioxide is hydrophilic titanium dioxide.
4. The method of manufacturing of claim 1, wherein: the white calcined metakaolin is high-activity kaolin calcined at low temperature, and the calcining temperature is 670-800 ℃.
5. The method of manufacturing of claim 1, wherein: the anti-reflection polymer is prepared from the following raw materials in parts by weight: 73 parts of acrylic emulsion, 2 parts of attapulgite, 4 parts of glass beads, 1 part of amorphous active fumed silica nano powder and 20 parts of water.
6. The method of manufacturing of claim 5, wherein: the glass beads are hollow glass beads.
7. The method of manufacturing of claim 1, wherein: the glass fiber felt and the glass fiber mesh cloth are alkali-resistant glass fiber felt and glass fiber mesh cloth, and the content of zirconium oxide is more than 16.5%.
8. The method of manufacturing of claim 1, wherein: the temperature of the steam curing room is 40-50 ℃, and the humidity is 90-98%; the temperature of the dry-heat curing chamber is 90-95 ℃.
9. The method of manufacturing of claim 1, wherein: the protective agent is a permeable siloxane protective agent.
10. The imitated white marble high-finish fiber reinforced concrete slab manufactured by the manufacturing method according to any one of claims 1-9.
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| CN202211064438.7A CN115504734A (en) | 2022-09-01 | 2022-09-01 | Manufacturing method of imitated white marble high-finish fiber reinforced concrete slab |
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Citations (5)
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|---|---|---|---|---|
| CN1163870A (en) * | 1997-04-07 | 1997-11-05 | 王建国 | High-finish degree white marble-imitating railing and preparing process thereof |
| CN101712835A (en) * | 2008-10-08 | 2010-05-26 | 上海汇丽涂料有限公司 | Heat reflection paint with hollow glass microballoon |
| CN107382188A (en) * | 2017-07-11 | 2017-11-24 | 卓匈新材料科技（上海）有限公司 | The artificial stone of artificial stone slurry and its curing molding |
| CN111606627A (en) * | 2020-06-01 | 2020-09-01 | 中国建材检验认证集团北京天誉有限公司 | Low-water-absorption GRC material prepared from white portland cement |
| CN113979696A (en) * | 2021-11-24 | 2022-01-28 | 镇江建科建设科技有限公司 | Formula and production process of glass fiber reinforced precast concrete member |
-
2022
- 2022-09-01 CN CN202211064438.7A patent/CN115504734A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163870A (en) * | 1997-04-07 | 1997-11-05 | 王建国 | High-finish degree white marble-imitating railing and preparing process thereof |
| CN101712835A (en) * | 2008-10-08 | 2010-05-26 | 上海汇丽涂料有限公司 | Heat reflection paint with hollow glass microballoon |
| CN107382188A (en) * | 2017-07-11 | 2017-11-24 | 卓匈新材料科技（上海）有限公司 | The artificial stone of artificial stone slurry and its curing molding |
| CN111606627A (en) * | 2020-06-01 | 2020-09-01 | 中国建材检验认证集团北京天誉有限公司 | Low-water-absorption GRC material prepared from white portland cement |
| CN113979696A (en) * | 2021-11-24 | 2022-01-28 | 镇江建科建设科技有限公司 | Formula and production process of glass fiber reinforced precast concrete member |
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| Title |
|---|
| 建筑施工手册第四版编写组: "《化学、应用化学、材料科学与工程专业大学生创新训练实验》", vol. 1, 中国建筑工业出版社, pages: 508 - 125 * |
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