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WO2013147370A1 - Matière de réparation pour une route en asphalte et procédé de réparation de route à l'aide de celle-ci - Google Patents

Matière de réparation pour une route en asphalte et procédé de réparation de route à l'aide de celle-ci Download PDF

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Publication number
WO2013147370A1
WO2013147370A1 PCT/KR2012/005863 KR2012005863W WO2013147370A1 WO 2013147370 A1 WO2013147370 A1 WO 2013147370A1 KR 2012005863 W KR2012005863 W KR 2012005863W WO 2013147370 A1 WO2013147370 A1 WO 2013147370A1
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WO
WIPO (PCT)
Prior art keywords
asphalt
epoxy
repair
road
volume
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.)
Ceased
Application number
PCT/KR2012/005863
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English (en)
Korean (ko)
Inventor
최동현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ROADCHEM CO Ltd
Original Assignee
ROADCHEM CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ROADCHEM CO Ltd filed Critical ROADCHEM CO Ltd
Priority to CN201280071899.5A priority Critical patent/CN104203865A/zh
Publication of WO2013147370A1 publication Critical patent/WO2013147370A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/14—Polyepoxides
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
    • E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
    • 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
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
    • 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
    • C04B2111/72—Repairing or restoring existing buildings or building materials

Definitions

  • the present invention relates to a road repairing material and a repair method using the same for repairing a broken part or a crack crack part of an asphalt road.
  • asphalt used for asphalt pavement according to the present invention refers to residues when most of volatile oil evaporates among petroleum oil components. Mainly black or dark brown.
  • Asphalt is produced naturally and artificially from petroleum, and most of the asphalt currently used for pavement is petroleum asphalt. Asphalt has a high temperature and becomes a liquid state, and at low temperatures, it becomes very hard, and when paving roads, solid asphalt is heated and melted into a liquid state and aggregates such as crushed stone, sand, and stone About 5 to 6% of liquid asphalt is mixed and applied to the road and then compacted to pave the road to form an asphalt road.
  • Asphalt road pavement has a layered structure by the surface layer, base layer, and auxiliary base layer from the bottom, and among them, asphalt mixture of asphalt and aggregate is used as the material constituting the surface layer of asphalt pavement, and the usual porosity is 4 % Is around.
  • Asphalt roads are partially damaged or cracked due to various factors such as lack of compaction, insufficient construction quality control when paving roads, and environmental impacts.
  • the first object of the present invention devised to solve the above problems is to provide a repair material that can selectively fill a relatively narrow range of cracks, such as cracks, including partial breakage in a wide range of asphalt roads,
  • a fast epoxy mortar which is a mixture of fast epoxy and silica sand, it is possible to reduce the time required for construction by accelerating the hardening speed of repairing materials and to have excellent cohesion with existing road pavement. It is to provide a water repellent for asphalt road to prevent water from seeping.
  • the surface aggregate of the asphalt is partially or intensively damaged by using the fast-hard epoxy mortar mixed epoxy and silica sand up to a volume ratio 1: 2 to 1: 4: Plastering will restore the surface.
  • the pot life time of epoxy hard mortar mixed with epoxy and silica sand by volume ratio 1: 0, 1: 1, 1: 2, 1: 3, 1: 4, 1: 5 is 20 minutes, 60 minutes, 3 hours, 5 hours, 6 hours.
  • the surface aggregate of the asphalt is partially or intensively damaged by using the fast-hard epoxy mortar mixed epoxy and silica sand in a volume ratio of 1: 2 to 1: 4 on the surface of the fall off Plastering will restore the surface.
  • the compressive strength of the fast-hard epoxy mortar in which epoxy and silica sand were mixed at a volume ratio of 1: 1, 1: 2, 1: 4, and 1: 5 was 40.9, 29, 20, and 10.4 kg / mm 2.
  • the adhesion strength of the fast-hard epoxy mortar obtained by mixing epoxy and silica sand up to 1: 2, 1: 3, 1: 4, 1: 5 by volume is 2.05, 1.5, 1.25, 0.8 kg / mm2.
  • Asphalt road repairing material according to the present invention, by combining the silica sand contained in the repairing material and fast-epoxy epoxy is added to the compressive strength and adhesion of the characteristics of the epoxy, as well as the cohesion of the repairing material itself as well as the cohesion with the existing paving
  • epoxy is the best waterproofing material
  • epoxy mortar is filled in the dropped part between the crushed stone and the crushed stone in the asphalt road even if the water penetrated into the repaired package is expanded or shrunk according to the seasonal change.
  • Restoration of the original form has the advantage of improving the durability of the repair pavement and the existing asphalt road.
  • the fast-hardening epoxy contained in the repair material is quickly cured after pavement repair pavement, and the process of heating the asphalt is excluded, so that the repair construction time can be shortened, thereby minimizing the vehicle movement time limit.
  • FIG. 1 is a cross-sectional view showing a damaged portion repair form partially dropped from the entire surface of the asphalt road according to the present invention.
  • FIG. 2 is a cross-sectional view showing a damaged portion repaired form while partly hollowed out of the asphalt road according to the present invention.
  • FIG 3 is a cross-sectional view showing a repair portion of the crack of the asphalt road according to the present invention.
  • Figure 4 is a block diagram showing step by step repair process of asphalt road according to the present invention.
  • FIG. 5 shows a surface in which crushed stone is generally taken out from an asphalt road that is actually used.
  • Figure 8 shows the process of applying the epoxy mortar on the asphalt road according to the present invention and the test of the adhesion strength and the dropping state of the specimen.
  • 27 to 29 are test results obtained by measuring the compressive strength by cutting the existing asphalt as a comparison specimen.
  • 30 to 36 are test results and test reports obtained by measuring the absorptivity in the original state by cutting the existing asphalt, which is a comparative test piece.
  • 37 to 43 are test results and test reports obtained by measuring the absorption rate in a dry heating state by cutting the existing asphalt, which is a comparative test piece.
  • Asphalt road repairing material according to the present invention is a repairing material for repairing broken parts in the form of crushed and concentrated form out of the partial crushed stone on the entire surface of the road.
  • epoxy mortar made of fast-hard epoxy and silica sand is used as a repair material for repairing a broken part of an asphalt road.
  • the particle diameter of the silica sand forming the repair material is 20 to 100 mesh and the mixing ratio of epoxy and silica sand can be calculated by the test conditions.
  • FIG. 1 is a cross-sectional view showing a damaged portion repair form partially dropped from the entire surface of the asphalt road according to the present invention.
  • the existing pavement 10 refers to a general asphalt road layer, and the damaged part 10a is partially broken over a relatively wide range of the existing pavement 10, and thus, the photo of FIG. It refers to the part that became shy together.
  • the repair package 20 may be filled by filling the damaged part repairing material 20a in the damaged part 10a. It is formed so that the breakage portion (10a) is the same height as the road surface of the existing package (10), so as not to further pie.
  • a fast epoxy mortar mixed with a fast epoxy and silica sand is used, and the material is kneaded by mixing with a drum mixer or a drill.
  • Silica sand is used in the fast curing epoxy mortar 20 to 100 mesh
  • the fast curing epoxy is 4-nonylphenol (4-nonylphenol) 5% by weight, aminoethylpiperazine (Aminoethylpiperazine) 11-19% by weight, Fast curing epoxy with 12% by weight of Fatty Acid Polyamide and 64 ⁇ 72% by weight of bis-polymer. It is recommended to mix epoxy and silica sand by volume ratio of 1: 2 ⁇ 1: 4. desirable.
  • FIG. 2 is a cross-sectional view showing a damaged portion repaired form of the asphalt road according to the present invention while partially recessed.
  • the damaged part 10a is formed in the form of the aggregate of the existing package 10 partially, the vehicle is impacted by the damaged part 10a during the passage of the vehicle, so that the vehicle is conducted when the vehicle is damaged or pitted.
  • the damaged portion 10a is filled with the damaged portion repair material 20a to form the repair package 20
  • the damaged portion 10a is formed by the repair package 20. Repair it in advance so that it is the same height as the road surface, so that the hole does not proceed to the defect.
  • the repairing material for this purpose uses a fast epoxy mortar mixed with a fast epoxy and silica sand as described above, wherein the silica sand is 20 to 100 mesh, the fast epoxy is 4-nonylphenol (4 -Fast epoxy with 5% by weight of nonylphenol, 11-19% by weight of aminoethylpiperazine, 12% by weight of Fatty Acid Polyamide, and 64-72% by weight of bis-polymer.
  • Epoxy and silica sand can be mixed in a volume ratio of 1: 2 to 1: 4.
  • FIG 3 is a cross-sectional view showing a repair portion of the crack of the asphalt road according to the present invention.
  • the crack part is damaged due to a dynamic load applied to the crack 10b during vehicle traffic.
  • the cracks 10b should be filled with the crack repairing material 20b to form the repair package 20 to repair the height of the cracks 10b to the same height as the road surface of the existing package 10.
  • the fast-hard epoxy mortar which mixed the above-mentioned fast-hard epoxy and silica sand is used.
  • the repair package 20 when the repair package 20 is formed in each of the damaged part 10a and the crack part 10b using the epoxy mortar, the repair package 20 is excellent because the adhesion strength of the filled epoxy mortar is excellent. To prevent water from seeping into the filled part.
  • Coating waterproofing agent is a colorless and odorless liquid that exists in the form of cohesive jelly like rubber when water evaporates. Can be.
  • the present invention is not limited to these materials and can be applied by selecting a waterproofing agent that exhibits the same or equivalent properties as the illustrated waterproofing agent.
  • the existing waterproofing agent is only to prevent water from entering the surface, and is not the concept of restoring the damaged surface due to the dropping of the aggregate.
  • the existing waterproofing agent has a compressive strength, adhesion strength and waterproofness while restoring the surface. There was no concept of payback.
  • the compounding ratio of the quick-drying epoxy mortar material which is the said water-retaining material is mixed in 20-33 volume% of quick-drying epoxy, and 80-67 volume% of silica sand of 20-100 mesh.
  • the blending ratio exemplified herein is an optimal numerical range in consideration of pot life, curing drying time, compressive strength, and adhesive strength of the repairing material, as in the following test example.
  • the present invention provides fast-hardening epoxy and silica sand without heating and melting asphalt. Since the use of the mixed fast-hard epoxy mortar is the subject matter, when the repair material is prepared by applying the fast-hard epoxy and silica sand exemplified above, it should be understood that it falls within the scope of the present invention even if it is outside the range of the above-described illustrated numerical value. do.
  • the fast curing epoxy mortar in which the fast curing epoxy and the silica sand are mixed to fill the breaking portions 10a and 10b is filled in the breaking portions 10a and 10b
  • the fast curing epoxy mortar is fast. Since it is cured in the pot life and completely cured and dried within 8 hours, it can be installed in the form of partial maintenance or total maintenance by controlling the traffic flow partly.
  • the curing drying time depends on the temperature, so the actual asphalt floor is heated by sunlight and hardened and dried in a shorter time, so that the vehicle can pass quickly. In summer, the road can be used within two hours.
  • Figure 4 is a block diagram showing step by step repair process of asphalt road according to the present invention.
  • the road repair method according to the present invention the damaged part repairing material 20a or cracks in the damaged part 10a or the cracked part 10b generated in the existing pavement 10.
  • the fast-hard epoxy mortar for the repair package 20 is mixed using a drum mixer or a drill mixer in the field and rubbed on the floor as if using a trowel or rubber trowel.
  • a drum mixer or a drill mixer in the field and rubbed on the floor as if using a trowel or rubber trowel.
  • only one application of plastering to complete the work and the damaged surface repair material (20a) over the existing package 10 can be made flat surface in a very innovative and simple way that only the fine aggregate portion is filled without forming a coating layer. This is a new way to avoid partial pit pie repairs by performing a partial fine surface repair.
  • repair package 20 is cured after a certain time can be used immediately.
  • the repair package 20 is made of fast-hard epoxy and silica sand bar, epoxy helps the adhesion of the silica sand and the silica sand, and because it does not form a volume itself, the surface of the repair package 20 is made of silica sand Because of the friction, the friction is so large that it is not slippery at all. It is preferable to mix 20 to 33% by volume of epoxy resins and 80 to 67% by volume of silica sand, but the present invention is not limited to the blending ratio, and the blending ratio may be adjusted by road characteristics. .
  • the asphalt used in the actual road was peeled off and the material was applied on its surface to harden.
  • FIG. 8 is a view showing the test of the adhesive strength after peeling off the asphalt road actually used to apply the fast epoxy mortar, the asphalt broken asphalt showing that the asphalt and the fast epoxy mortar does not fall even if the asphalt is broken. Show the Psalms.
  • Curing drying time test method KS M 5000: 2009 Curing drying time (hours) 7 Sample 1-2 (fast curing epoxy 33% by volume: silica sand 67% by volume) 1: 2 Pot life (hours) One Curing drying time (hours) 7 Sample 1-3 (fast-drying epoxy 25% by volume: silica sand 75% by volume) 1: 3 Pot life (hours) 3 Curing drying time (hours) 8 Sample 1-4 (20% by volume hard epoxy: 80% by volume of silica sand) 1: 4 Pot life (hours) 5 Curing drying time (hours) 10 Sample 1-5 (17% by volume hard epoxy: 83% by volume of silica sand) 1: 5 Pot life (hours) 6 Curing drying time (hours) 12
  • the compressive strength of the repair material block according to the present invention is 40.9, 29, 20, 10.4 N / mm2 at a volume ratio of fast-hardening epoxy: silica sand at 1: 1, 1: 2, 1: 4, and 1: 5, respectively.
  • the compressive strength of the block (Sample 3-1 in Table 3) is 14.6 N / mm 2, whereby the repairing material according to the present invention is suitable for a section of 1: 2 to 1: 4, which has a higher compressive strength than conventional asphalt blocks.
  • a fast hard epoxy: silica sand sand volume ratio of 1: 2 to 1: 4 is suitable for actual road application.
  • the adhesive strength of the repairing material block according to the present invention is 2.05, 1.5, 1.25, 0.8 N / mm2 at a volume ratio of fast-hardening epoxy: silica sand at 1: 2, 1: 3, 1: 4, 1: 5, and concrete flooring Since the reference bond strength of the 0.8 N / m2 or more, through this it can be seen that the repair material according to the present invention is suitable for the section of 1: 2 ⁇ 1: 4 having a larger bond strength than the existing road asphalt block, Results showed that the fast-hardening epoxy: silicasand volume ratio of 1: 2 to 1: 4 is suitable for road applications.
  • the pot life of the repair material block according to the present invention is 0.33, 1, 3, 5, 6 hours at a volume ratio of fast-hardening epoxy: silica sand at 1: 0, 1: 2, 1: 3, 1: 4, and 1: 5, respectively.
  • the hardening drying time of the repair material block according to the present invention is 7, 7, 8, 10 at a volume ratio of fast-hardening epoxy: silica sand at 1: 0, 1: 2, 1: 3, 1: 4, 1: 5, respectively. , 12 hours.
  • the first hardening time is 1 to 5 hours and the hardening drying time in which the curing is completely completed and dried is suitable for selecting a section of 7 to 10 hours.
  • Results showed that silica sand volume ratios of 1: 2 to 1: 4 are suitable.
  • the curing and drying time of epoxy is very decisively affected by the temperature. Actually, the curing is carried out under the condition that asphalt is heated, so the curing and drying time is much faster in this section. In summer, it hardens to dry within 2 hours.
  • maintain the absorption rate 0.1%. This is because the open pores are all melted and connected to each other during the heating process, so there is no space for water to penetrate.
  • the water-repellent solution was treated to improve the waterproofing performance, but the water absorption rate was lower than that of ordinary asphalt pavement or urethane waterproofing materials.
  • Heat-drying is a 24 hour heat-drying at 60 ° C. to measure the absorption rate, but since it does not actually reach 60 ° C., the absorption rate in the 0.1% range is a fairly good absorption rate.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Architecture (AREA)
  • Road Paving Structures (AREA)
PCT/KR2012/005863 2012-03-30 2012-07-23 Matière de réparation pour une route en asphalte et procédé de réparation de route à l'aide de celle-ci Ceased WO2013147370A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201280071899.5A CN104203865A (zh) 2012-03-30 2012-07-23 沥青路面补修材料及其使用方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120033364A KR101160540B1 (ko) 2012-03-30 2012-03-30 아스팔트 도로용 보수재 및 이를 이용한 도로보수방법
KR10-2012-0033364 2012-03-30

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WO2013147370A1 true WO2013147370A1 (fr) 2013-10-03

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KR (1) KR101160540B1 (fr)
CN (1) CN104203865A (fr)
WO (1) WO2013147370A1 (fr)

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CN112646321A (zh) * 2020-12-23 2021-04-13 镇江蓝舶科技股份有限公司 一种沥青路面快速修复补强材料及制备方法
CN114426412A (zh) * 2020-10-29 2022-05-03 中国石油化工股份有限公司 一种沥青路面封层料及其制备方法与应用
CN114988788A (zh) * 2021-12-22 2022-09-02 上海城建城市运营(集团)有限公司 一种沥青路面坑槽修补用材料及其制备方法
CN117510127A (zh) * 2023-11-21 2024-02-06 中国建筑第八工程局有限公司 用于沥青路面坑槽的快速修补组合物和制备方法、断面结构装置、施工装置和方法

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KR101522505B1 (ko) * 2014-09-29 2015-05-21 로드켐 주식회사 콘크리트, 아스팔트 도로의 크랙 보수 및 전면 미장도포방법
KR101804795B1 (ko) * 2016-11-29 2017-12-08 로드켐 주식회사 도로면의 파손부 보수재 및 보수방법
CN108689636B (zh) * 2018-06-20 2020-12-18 宁波工程学院 聚脲树脂快速修补材料及道路快速修补方法
KR102126856B1 (ko) * 2020-05-18 2020-06-26 한일콘(주) 아스팔트 균열 보수용 탄성봉합재 및 이를 이용한 아스팔트 균열 보수 공법
KR102428246B1 (ko) 2021-07-30 2022-08-02 (주)세스 변성 고분자를 함유한 연성 시멘트 콘크리트
KR102363749B1 (ko) 2021-11-25 2022-02-17 주식회사 부영테크원 고연성의 초속경 및 조강성 시멘트 콘크리트 조성물 및 이를 이용한 도로포장 시공방법
KR102504056B1 (ko) 2022-03-15 2023-03-02 (주)세스 수용성 변성 아크릴수지를 함유한 연화 시멘트 콘크리트
KR20250117493A (ko) 2024-01-26 2025-08-05 주식회사 장벽 무시멘트 섬유보강 폴리머 콘크리트 및 이를 이용한 제조방법

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