KR101173442B1 - Permeable concrete block manufacture method to use eco-friendly recycled aggregate coated - Google Patents
Permeable concrete block manufacture method to use eco-friendly recycled aggregate coated Download PDFInfo
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- KR101173442B1 KR101173442B1 KR20120034782A KR20120034782A KR101173442B1 KR 101173442 B1 KR101173442 B1 KR 101173442B1 KR 20120034782 A KR20120034782 A KR 20120034782A KR 20120034782 A KR20120034782 A KR 20120034782A KR 101173442 B1 KR101173442 B1 KR 101173442B1
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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
- 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
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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
- 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
- C04B41/483—Polyacrylates
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/60—Agents for protection against chemical, physical or biological attack
- C04B2103/65—Water proofers or repellants
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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
- 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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/40—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
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- 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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Abstract
Description
본 발명은 폐콘크리트를 파쇄한 순환골재를 이중 코팅하여 이를 포함하는 투수성 콘크리트 블록 및 그의 제조방법에 관한 것이다.The present invention relates to a water-permeable concrete block and a method of manufacturing the same comprising double coating the recycled aggregate crushed waste concrete.
최근 도시 재개발사업 및 사회기반시설의 확충 등으로 국내 건설현장에서는 막대한 양의 건설산업부산물이 발생되고 있으며, 2009년 환경부 통계에 의하면 총 폐기물 중에서 건설산업부산물은 51%로 가장 큰 구성비율을 차지하고 있다. 이의 연간 총 발생량은 약 6,692만톤으로 10년간의 발생량이 595%(년 60%) 증가하였으며, 건설산업부산물 중 가장 큰 비율(63.0%)을 차지하는 폐콘크리트는 연간 약 4,213만톤이 발생되고 있다. 우리나라는 이러한 폐콘크리트에 대한 재활용 지원책 등 재활용기반이 미흡하여 재활용을 저해하는 요소가 많고 폐기물처리 및 재활용을 고려하지 않은 해체공사로 인한 폐기물 발생으로 처리비가 매년 증가하고 있는 실정이다.Due to the recent urban redevelopment projects and the expansion of social infrastructure, huge amounts of construction industry by-products are generated at domestic construction sites. According to the Ministry of Environment's statistics in 2009, construction industry by-products accounted for 51% of the total waste. . Its annual total generation amount is about 69.62 million tons, which is increased by 595% (60% per year) for 10 years, and waste concrete, which accounts for the largest proportion (63.0%) of construction industry by-products, is generating about 4,213 million tons per year. In Korea, there are many factors that hinder recycling due to the lack of recycling infrastructure such as recycling support measures for waste concrete, and the cost of treatment increases every year due to waste generation caused by decommissioning work that does not consider waste disposal and recycling.
또한, 폐콘크리트 순환골재는 KS규정을 만족하기 위하여 경제적으로 많은 비용이 소요되며, 고품질의 순환골재의 품질규정을 맞추기 위하여 폐콘크리트 순환골재에 부착되어 있는 구모르타르를 제거하는 기술이 요구된다. 이를 위하여 기존의 연구에서는 대부분 폐콘크리트 생산상의 마쇄조건(크라샤 종류, 파쇄시간 등) 및 골재의 세척조건에 중점을 두어 연구가 수행되었으며, 연구결과를 실제 적용하기 위하여 초기에 많은 설비투자 비용이 소요될 뿐만 아니라 일정한 품질의 확보가 어려운 문제점이 있는 실정이다. In addition, waste concrete recycled aggregates are economically expensive to satisfy the KS regulations, and in order to meet the quality regulations of high-quality recycled aggregates, a technique for removing the gu mortar attached to the waste concrete recycled aggregates is required. For this purpose, most of the existing studies have focused on the grinding conditions (crushing type, crushing time, etc.) and the washing conditions of aggregates in the production of waste concrete. Not only that, but it is difficult to secure a certain quality.
이러한 문제를 해결하고자 폐콘크리트의 유효재활용률을 증대시키기 위하여 순환골재 세척과정에서 침투방수제 및 도포방수제 등의 특수화학제를 사용한 폐콘크리트 순환골재의 코팅기술이 필요할 뿐만 아니라 순환골재에서 유출되는 유해물질 등을 제거할 수 있도록 광촉매 산화제 등을 사용한 친환경 처리기술이 추가적으로 이루어지는 폐콘크리트 순환골재의 이중 코팅 기술 및 이를 이용한 콘크리트의 적용연구가 절실히 요구되고 있다.In order to solve this problem, in order to increase the effective recycling rate of waste concrete, coating technology of waste concrete circulating aggregates using special chemicals such as infiltration waterproofing agent and coating waterproofing agent is required in the process of cleaning circulating aggregates, as well as harmful substances discharged from circulating aggregates. There is an urgent need for a double-coating technology for waste concrete recycled aggregates in which eco-friendly treatment technology using a photocatalytic oxidant and the like, and the application of concrete using the same, are needed.
대한민국공개특허 제 10-2009-0078930호 “수성발수제로 피복된 순환골재와 이를 이용한 콘크리트조성물”에는 수성발수제를 순환굵은 골재에 피복하여 콘크리트용 골재로 사용가능하도록 순환 골재의 성능을 개선시킨 순환골재를 제공하고 있지만, 흡수율 또는 마모율면에서 그 효과가 충분하지 못하며 이를 사용한 콘크리트의 강도 및 내구성이 약한 단점을 내포하고 있다.Republic of Korea Patent Publication No. 10-2009-0078930 "Recirculating aggregate coated with an aqueous water repellent and concrete composition using the same" is a circular aggregate that improves the performance of the circulating aggregate to be used as a concrete aggregate by coating the aqueous water repellent to the cyclic thick aggregate However, the effect is not sufficient in terms of water absorption or wear rate, and has the disadvantage of weak strength and durability of the concrete using the same.
본 발명은 상기의 문제점을 극복하기 위한 것으로, 폐콘크리트를 파쇄하고 이중 코팅하여 수분 흡수율과 마모율이 감소되고, 강도 및 내구성이 향상된 투수성 콘크리트 블록 및 그의 제조방법을 제공하는데 그 목적이 있다.The present invention is to overcome the above problems, it is an object of the present invention to provide a water-permeable concrete block and a method of manufacturing the same by crushing and double-coating waste concrete reduced water absorption and wear rate, improved strength and durability.
상기의 목적을 달성하기 위한 본 발명은 a) 폐콘크리트를 파쇄하여 순환 굵은골재 및 순환 잔골재를 제조하는 단계; b) 물과 침투성 방수제를 포함한 혼합용액으로 상기 순환 굵은골재와 순환 잔골재를 1차 코팅하고 1차 양생하는 단계; c) 상기 b) 단계 후 물과 규산염을 포함한 혼합용액으로 2차 코팅하고 2차 양생하여 이중 코팅된 순환 굵은골재와 순환 잔골재를 제조하는 단계; d) 상기 이중 코팅된 순환 굵은골재, 순환 잔골재 또는 천연잔골재, 결합재, 혼합수 및 혼화제를 혼합하여 혼합물을 제조하는 단계; 및 e) 상기 혼합물을 콘크리트 형틀에 투입하여 성형하고 양생하는 단계;를 포함하는 투수성 콘크리트 블록의 제조방법에 관한 것이다. The present invention for achieving the above object is a) crushing the waste concrete to produce a circulating coarse aggregate and circulating fine aggregate; b) first coating and circulating the circulating coarse aggregate and the circulating fine aggregate with a mixed solution containing water and a permeable waterproofing agent; c) after the step b) the second coating with a mixed solution containing water and silicate and secondary curing to prepare a double coated circular coarse aggregate and circulating fine aggregate; d) preparing a mixture by mixing the double coated circulating coarse aggregate, circulating fine aggregate or natural fine aggregate, binder, mixed water and admixture; And e) molding and curing the mixture into a concrete mold.
또한 본 발명은 상기 c)단계 후 물, 메탄올 및 광산화촉진 분말을 1: 0.01 ~ 1: 0.01 ~ 1 중량비로 포함된 혼합된 용액으로 코팅하는 단계를 더 포함하는 투수성 콘크리트 블록의 제조방법에 관한 것이다.In another aspect, the present invention relates to a method for producing a water-permeable concrete block further comprising the step of coating the mixed solution containing water, methanol and photo-oxidation promoting powder in a weight ratio of 1: 0.01 ~ 1: 0.01 after the step c) will be.
또한 본 발명은 압축강도 18 Mpa 이상, 휨강도 4 MPa 이상, 투수계수 0.1mm/sec 이상, 공극률 8% 이상 및 내동해성 45 Cycle 이상인 투수성 콘크리트 블록에 관한 것이다.The present invention also relates to a permeable concrete block having a compressive strength of at least 18 Mpa, a flexural strength of at least 4 MPa, a permeability coefficient of at least 0.1 mm / sec, a porosity of at least 8%, and at least 45 cycles of freeze resistance.
또한 본 발명은 투수성 콘크리트 블록은 차도, 보도, 공원 및 주차창에 사용되는 경계석 블록, 보도용 및 주차용 인터로킹블록과 사각블록에 사용되는 것인 투수성 콘크리트 블록에 관한 것이다.In addition, the present invention relates to a water-permeable concrete block is a permeable concrete block that is used in the boundary stone blocks used for driveways, sidewalks, parks and parking windows, sidewalks and parking interlocking blocks and square blocks.
이하 본 발명의 구성에 대하여 더욱 구체적으로 설명한다.Hereinafter, the configuration of the present invention will be described in more detail.
상기 a)단계는 폐콘크리트를 파쇄하는 단계로 죠크러셔 등으로 폐콘크리트를 잘게 분쇄한 것으로 입도 5 mm 이하인 순환 잔골재와 입도 5 ~ 10 mm, 8 ~ 13 mm 또는 8 ~ 25 mm인 순환 굵은골재의 단일입도로 선별하여 투수성 콘크리트 조성물에 포함시키는 것이 바람직하다. 상기의 입도범위를 갖는 순환 잔골재 및 순환 굵은골재를 포함하는 것이 투수성 콘크리트 블록의 제조시 공극률, 투수계수, 강도, 경도 및 유연성을 향상시켜 주기 때문이다.Step a) is a step of crushing the waste concrete to finely pulverize the waste concrete, such as jaw crusher of circulating fine aggregate having a particle size of 5 mm or less and circulating coarse aggregate having a particle size of 5 ~ 10 mm, 8 ~ 13 mm or 8 ~ 25 mm It is desirable to select a single particle size to include in the water-permeable concrete composition. This is because the inclusion of the circulating fine aggregate and the circulating coarse aggregate having the above particle size range improves the porosity, permeability coefficient, strength, hardness and flexibility in the manufacture of the permeable concrete block.
본 발명의 b)단계는 순환 굵은골재 및 순환 잔골재를 1차 코팅하고 1차 양생하는 단계로, 물 : 침투성 방수제를 0.01 ~ 0.99 : 1 중량비를 포함한 혼합용액으로 1차 코팅하는 것이 바람직하다. 상기의 혼합용액으로 코팅하는 것은 파쇄된 순환골재에 부착된 구모르타르에 침투하고 1차 양생과정시 구모르타르 내부에서 중합반응을 일으켜 경화됨으로서 순환 굵은골재와 순환 잔골재의 흡수율과 흡수율의 편차를 낮추고 순환 굵은골재와 순환 잔골재의 안정성을 증대시켜 줄 수 있기 때문이다. 또한 상기 침투성 방수제는 탄화수소계 아크릴 수지를 포함하는 것이 바람직하며, 이는 순환 굵은골재와 순환 잔골재에 부착된 구모르타르의 수축을 최소화하고 수분증발을 억제시켜 강도를 증가, 균열을 저감시켜주며 내구성이 향상 될 수 있도록 해 주기 때문이다. 상기 침투성 방수제는 탄화수소계 아크릴 수지를 포함하는 것이 바람직하며, 예로는 타스(주)의 크리스톤을 들 수 있다. Step b) of the present invention is a step of primary coating and first curing the circulating coarse aggregate and the circulating fine aggregate, it is preferable to first coat the water: permeable waterproofing agent with a mixed solution containing 0.01 to 0.99: 1 weight ratio. Coating with the above mixed solution penetrates into the mortar adhering to the crushed circulating aggregate and hardens by polymerizing in the mortar during the first curing process. This is because it can increase the stability of coarse aggregate and circular fine aggregate. In addition, the permeable waterproofing agent preferably includes a hydrocarbon-based acrylic resin, which minimizes the contraction of the constituent coarse aggregate and gumortar attached to the circulating fine aggregate, inhibits water evaporation, increases strength, reduces cracking, and improves durability. Because it makes it possible. It is preferable that the permeable waterproofing agent contains a hydrocarbon-based acrylic resin, and examples thereof include Christon of Tas Corporation.
상기 1차 양생은 1차 코팅 후 순환 골재의 수분 흡수율이 0.01 ~ 40%가 되도록 하는 것이 강도 및 내구성 증가에 바람직하다. The primary curing is preferably to increase the strength and durability of the moisture absorption of the circulating aggregate after the primary coating is 0.01 ~ 40%.
본 발명의 c)단계는 순환골재를 1 차 코팅하고 1차 양생한 순환 굵은골재와 순환 잔골재를 물과 규산염을 포함한 혼합용액으로 2차 코팅하고 2차 양생하여 이중 코팅된 순환 굵은골재와 순환 잔골재를 제조하는 단계로, 상기 물과 규산염은 1 : 1 ~ 0.01 중량비를 포함하여 혼합하는 것이 바람직하다. 상기의 범위로 물과 규산염을 포함한 혼합용액으로 순환 굵은골재와 순환 잔골재를 코팅하면 경도 및 마모에 대한 저항성을 증가시킬 수 있기 때문이다. 또한 2차 코팅 후 2차 양생은, 실온 또는 5 ~ 40℃에서 건조 하는 것이 바람직하다. 상기 규산염으로는 규산나트륨, 규산칼륨, 알루미나규산염과 폴리아크릴산 나트륨을 혼합한 화합물 중에서 선택되는 하나 또는 둘 이상의 혼합물을 사용할 수 있다.In step c) of the present invention, the first cycle is coated with circulating aggregates, and the first circulated coarse aggregates and circulated fine aggregates are secondly coated with a mixed solution including water and silicate, and the second cure is double coated circulating coarse aggregates and circulated fine aggregates. In the preparing step, the water and the silicate are preferably mixed, including 1: 1 to 0.01 weight ratio. This is because when the circulating coarse aggregate and the circulating fine aggregate are coated with the mixed solution containing water and silicate in the above range, the hardness and resistance to abrasion can be increased. Moreover, it is preferable to dry secondary curing after secondary coating at room temperature or 5-40 degreeC. As the silicate, one or a mixture of two or more selected from compounds in which sodium silicate, potassium silicate, alumina silicate and sodium polyacrylate are mixed may be used.
본 발명에서 1차 또는 2차 코팅은 살수, 침지 및 도포 등 통상의 방법으로 할 수 있다.In the present invention, the primary or secondary coating can be carried out by conventional methods such as watering, dipping and applying.
상기 c)단계 후 물 : 메탄올 : 광산화촉진 분말을 1 : 0.01 ~ 1 : 0.01 ~ 1 중량비로 포함하여 혼합한 용액으로 코팅하는 단계를 더 포함 할 수 있다. 상기의 물, 메탄올 및 광산화촉진 분말을 혼합한 혼합용액으로 더 코팅하는 것은 순환 굵은골재와 순환 잔골재의 유해물질을 제거하고 친환경 골재를 제조하는데 바람직하기 때문이다. 상기 광산화촉진 분말의 예로는, TiO2분말의 함량이 93%이상, 입자크기 0.2~1.0㎛, 비표면적 140cm2/g이상, 밀도 3.0~4.5g/cm3, pH 6~8.5이며 아나타제(Anatase)의 결정상을 갖는 분말 일 수 있다.After the step c) may include a step of coating with a mixed solution including water: methanol: photo-oxidation promoting powder in a weight ratio of 1: 0.01 ~ 1: 0.01 ~ 1. Further coating with the mixed solution of the water, methanol and the photo-oxidation promoting powder is because it is preferable to remove the harmful substances of the circulating coarse aggregate and the circulating fine aggregate and to produce environmentally friendly aggregate. Examples of the photooxidation promoting powder, TiO 2 powder content of 93% or more, particle size 0.2 ~ 1.0㎛, specific surface area 140cm 2 / g or more, density 3.0 ~ 4.5g / cm 3 , pH 6 ~ 8.5 and anatase (Anatase It may be a powder having a crystal phase of).
본 발명의 d)단계에서 결합재는 보통포틀랜드 시멘트; 보통포틀랜드 시멘트와 고로슬래그 미분말을 혼합한 저탄소 2종 혼합시멘트; 보통포틀랜드 시멘트, 고로슬래그 미분말 및 플라이애시를 혼합한 저탄소 3종 혼합시멘트; 중에서 선택되는 어느 하나를 포함할 수 있다. 또한 상기 결합재는 순환 굵은골재 100중량부에 대하여 15 ~ 30 중량부 포함하는 것이 바람직하며, 이는 압축강도 및 내구성 향상에 영향을 미친다.In step d) of the present invention, the binder is usually Portland cement; Low-carbon two kinds of cement mixed with ordinary Portland cement and blast furnace slag fine powder; Low-carbon three-type mixed cement mixed with ordinary portland cement, blast furnace slag powder and fly ash; It may include any one selected from. In addition, the binder is preferably included 15 to 30 parts by weight based on 100 parts by weight of circulating coarse aggregate, which affects the improvement of compressive strength and durability.
상기 보통포틀랜드 시멘트와 고로슬래그 미분말 혼합시, 보통포틀랜드 시멘트 20 ~ 99 중량%와 고로슬래그 미분말 1 ~ 80중량%를 포함하는 것이 바람직하며, 보통포틀랜드 시멘트, 고로슬래그 미분말 및 플라이애시 혼합시, 보통포틀랜드 시멘트 20 ~ 90 중량%, 고로슬래그 미분말 1 ~ 65중량% 및 플라이애시 1 ~ 45중량%을 포함하는 것이 바람직하다. 상기 고로슬래그 미분말과 플라이애시를 상기와 같은 범위로 포함하게 되면, 모세공극이 감소하여 조직이 치밀해져 내구성이 향상되며, 초기강도 감소에 대한 문제점을 해결할 수 있기 때문에 바람직하다. 또한 상기 고로슬래그 미분말의 분말도가 4,000 ~ 10,000 cm2/g이고, 플라이애시 분말도는 3,000 ~ 6,000 cm2/g인 것이 바람직한데, 이는 내구성을 더욱 우수하게 해 주며, 강도가 감소되는 것을 막아 줄 수 있기 때문이다.When the ordinary portland cement and blast furnace slag fine powder are mixed, it is preferable to include 20 to 99% by weight of ordinary portland cement and 1 to 80% by weight of blast furnace slag, and common portland cement, blast furnace slag fine powder and fly ash when mixed, ordinary portland It is preferable to include 20 to 90% by weight of cement, 1 to 65% by weight of blast furnace slag powder and 1 to 45% by weight of fly ash. When the blast furnace slag fine powder and fly ash are included in the above range, capillary pores are reduced, so that the tissue is compact and durability is improved, which is preferable because the problem of initial strength reduction can be solved. In addition, the powder of the blast furnace slag powder is preferably 4,000 ~ 10,000 cm 2 / g, fly ash powder is 3,000 ~ 6,000 cm 2 / g, which is more excellent durability and prevents the decrease in strength Because I can give.
상기 d)단계에서 천연잔골재는 KS F 2357 기준에 적합한 것을 사용하는 것이 바람직하며, 예로는 입경 5mm 이하, 흡수율 0.89%, 절대건조 밀도 2.55g/cm2인 것을 들 수 있다.In step d), the natural fine aggregate is preferably used to meet the KS F 2357 standard, for example, the particle diameter of 5mm or less, water absorption 0.89%, absolute dry density of 2.55g / cm 2 It can be mentioned.
상기 혼합수는 콘크리트의 응결경화, 강도의 발현 등의 품질에 나쁜 영향을 미치거나 강재를 녹슬게 하는 물질을 함유하고 있지 않다면, 크게 제한되지 않고 사용될 수 있다.The mixed water may be used without any significant limitation as long as it does not contain a material that adversely affects the quality of condensation hardening of concrete, the development of strength, or rusts steel.
상기 혼화제는 고성능 AE감수제, 유동화제, AE제에서 선택되는 하나 또는 둘 이상의 혼합물을 포함 할 수 있다. 상기 혼화제의 함량은 순환골재 100중량부에 대하여 0.003 ~ 0.3 중량부 포함하는 것이 바람직하며, 상기의 범위로 혼화제를 포함하게 되면 결합재의 유동성확보와 콘크리트 조성물의 강도, 동결융해저항성이 향상될 수 있다.The admixture may include one or more mixtures selected from high performance AE reducing agents, fluidizing agents, and AE agents. The content of the admixture is preferably 0.003 to 0.3 parts by weight based on 100 parts by weight of circulating aggregate, and the inclusion of the admixture in the above range can improve the fluidity of the binder and the strength and freeze-thawing resistance of the concrete composition. .
또한 본 발명의 d) 단계에 단섬유 소재를 더 포함하여 사용할 수 있으며, 상기 단섬유로는 폴리비닐알콜섬유, 폴리에틸렌섬유 또는 나일론섬유 중에서 선택되는 하나 또는 둘 이상을 혼합한 혼합섬유일 수 있으며, 그 함량은 순환골재 100중량부에 대하여 0.001 ~ 0.1 중량부 포함할 수 있다. 상기 단섬유 소재를 상기의 범위로 포함하게 되면 압축강도, 휨강도 및 휨인성, 내마모성, 동결융해저항성이 기존의 투수성 콘크리트 보다 더욱 향상 되어 건조수축, 균열발생 등을 억제할 수 있기 때문에 바람직하다.In addition, the step d) of the present invention may be used to further comprise a short fiber material, the short fiber may be a mixed fiber mixed with one or two selected from polyvinyl alcohol fiber, polyethylene fiber or nylon fiber, The content may include 0.001 to 0.1 parts by weight based on 100 parts by weight of recycled aggregate. When the short fiber material is included in the above range, the compressive strength, flexural strength and flexural toughness, abrasion resistance, and freeze-thawing resistance are more improved than conventional water-permeable concrete, and thus it is preferable to suppress dry shrinkage and cracking.
또한 본 발명의 d) 단계에 고성능고강도 혼화재를 더 포함하여 사용할 수 있으며, 상기 고성능고강도 혼화재로는 무수석고, 생석회, 황산칼륨, 황산나트륨, 황산칼슘, 수산화칼륨 또는 수산화나트륨 중에서 선택되는 하나 또는 둘 이상의 혼합물일 수 있으며, 그 함량은 순환골재 100중량부에 대하여 0.001 ~ 10 중량부 포함할 수 있다. 상기 혼화재를 상기의 범위로 포함하게 되면 투수성 콘크리트 조성물의 압축강도 및 내구성, 구조적 성능을 기존의 투수성 콘크리트 보다 더욱 향상시킬 수 있기 때문에 바람직하다.In addition, the step d) of the present invention may further include a high-performance high-strength admixture, wherein the high-performance high-strength admixture includes one or two or more selected from anhydrous gypsum, quicklime, potassium sulfate, sodium sulfate, calcium sulfate, potassium hydroxide or sodium hydroxide. It may be a mixture, the content may include 0.001 to 10 parts by weight based on 100 parts by weight of recycled aggregate. Including the admixture in the above range is preferable because the compressive strength, durability, and structural performance of the permeable concrete composition can be further improved than conventional permeable concrete.
상기 e)단계는 상기 d)단계에서 혼합한 혼합물을 콘크리트 블록으로 성형 하고 양생하는 단계로, 혼합물을 블록성형기에 투입하고, 30 ~ 150 Hz의 표면진동과 80 ~ 300 kg/cm2의 압력으로 3 ~ 60 초간 성형하는 것이 바람직하다. 이는 혼합물이 성형틀 바닥으로 흘러내리지 않은 상태에서 혼합물들의 입자를 조밀하게 배치되게 해주고 상호 밀착이 좋아지게 하여 강도가 놓아지고 내구성이 좋아 질 수 있게 하기 때문이다. Step e) is a step of molding and curing the mixture mixed in the step d) into concrete blocks, the mixture is put into the block molding machine, the surface vibration of 30 ~ 150 Hz and the pressure of 80 ~ 300 kg / cm 2 It is preferable to mold for 3 to 60 seconds. This is because the particles of the mixtures are densely arranged and the adhesion is improved so that the strength is released and the durability is maintained without the mixture flowing down to the bottom of the mold.
상기 투수성 콘크리트 블록의 양생은 증기양생하는 것이 바람직하며, 증기양생은 15 ~ 25℃의 양생실에 성형된 블록을 투입하여 2 ~ 4시간 정치시키는 단계, 상온에서 30 ~ 60℃까지 90 ~ 180분 가열하는 승온단계, 30 ~ 60℃에서 240 ~ 720분 가열하는 등온단계 및 상온까지 90 ~ 180분 감온하는 감온단계, 15 ~ 25℃에서 2 ~ 4시간 다시 정치시키는 단계로 이루어진다. 상기 정치단계는 성형된 블록의 탈수현상을 억제하고 자연경화시켜 이후 단계인 승온단계에서 온도상승으로 인한 크랙발생을 방지할 수 있다. 상기 정치단계는 탈수현상을 방지하기 위해 양생실 내부에서 이루어지는 것이 바람직하다. 또한 승온단계에서는 급격한 온도상승으로 인한 블록의 크랙발생을 방지하기 위해서 온도를 서서히 올려주는 것이 바람직하다. 상기 등온단계는 정상적인 양생이 이루어지는 단계이며, 감온단계는 급격한 온도 저하로 인해 블록이 수축되면서 크랙이 발생되는 문제점을 발생할 수 있으므로 서서히 상온까지 감온하는 것이 좋다.Curing of the water-permeable concrete block is preferably steam curing, steam curing is a step of leaving the molded block in the curing room of 15 ~ 25 ℃ 2 to 4 hours, 90 ~ 180 to 30 ~ 60 ℃ at room temperature The heating step consists of a minute heating step, the isothermal step of heating 240 ~ 720 minutes at 30 ~ 60 ℃ and the temperature reduction step of 90 ~ 180 minutes to room temperature, step of standing again for 2 to 4 hours at 15 ~ 25 ℃. The stationary step may prevent dehydration of the molded block and harden it to prevent cracking due to temperature increase in a subsequent step of increasing the temperature. The stationary step is preferably made in the curing room to prevent dehydration. In addition, in the temperature raising step, it is preferable to gradually increase the temperature in order to prevent the occurrence of cracking of the block due to the rapid temperature rise. The isothermal step is a step in which normal curing is performed, and the temperature reduction step may gradually reduce the temperature to room temperature because the block shrinks due to a sudden temperature drop.
본 발명의 제조방법으로 제조된 투수성 콘크리트 블록은 압축강도 18 Mpa 이상, 휨강도 4 MPa 이상, 투수계수 0.1mm/sec 이상, 공극률 8% 이상 및 내동해성 45 Cycle 이상이며, 상기 투수성 콘크리트 블록은 차도, 보도, 공원 및 주차장에 사용되는 경계석 블록, 보도용 및 주차용 인터로킹블록과 사각블록에 사용될 수 있다. The permeable concrete block produced by the manufacturing method of the present invention has a compressive strength of at least 18 Mpa, a flexural strength of at least 4 MPa, a permeability coefficient of at least 0.1 mm / sec, a porosity of at least 8%, and a corrosion resistance of at least 45 cycles. It can be used in boundary stone blocks used in driveways, sidewalks, parks and parking lots, interlocking blocks for sidewalks and parking and square blocks.
상기 내동해성은 상대동탄성계수가 60%이하에 도달할 경우의 싸이클수를 의미하는 것이다. The dynamic resistance means the number of cycles when the relative dynamic modulus reaches 60% or less.
이와 같은 본 발명은 순환 굵은골재와 순환 잔골재를 이중 코팅하여 순환골재 자체의 공극 및 균열의 충진 효과를 구비하여 순환골재의 흡수율을 근본적으로 저하시키고, 이를 통해 내구성과 강도가 우수한 투수성 콘크리트 블록을 제조하였다. The present invention has a filling effect of the voids and cracks of the circulating aggregate itself by double coating the circulating coarse aggregate and the circulating fine aggregate, thereby fundamentally lowering the absorption rate of the circulating aggregate, thereby making the water-permeable concrete block excellent in durability and strength. Prepared.
도 1은 본 발명의 코팅된 친환경 순환골재를 포함하는 투수성 콘크리트 블록 및 그의 제조방법의 개념도.1 is a conceptual diagram of a water-permeable concrete block and a manufacturing method comprising a coated environmentally friendly recycled aggregate of the present invention.
1. 순환골재의 밀도 및 흡수율 시험방법 (KS F 2503)1. Test Method for Density and Absorption Rate of Recycled Aggregate (KS F 2503)
① 밀도 및 흡수율을 나타내는 흡수율은 다음 식으로 구한다. ① Absorption rate indicating density and water absorption is calculated by the following equation.
2. 로스앤젤레스 시험기에 의한 순환골재의 마모 시험방법 (KS F 2508)2. Test method for wear and tear of recycled aggregate by Los Angeles tester (KS F 2508)
① 실험결과의 계산은 다음 식에 의한다. ① Calculation of the experimental result is based on the following formula.
3. 콘크리트의 압축강도 시험방법 (KS F 2405)3. Test method of compressive strength of concrete (KS F 2405)
① 압축강도의 계산은 다음 식에 의한다. ① Calculation of compressive strength is based on the following formula.
4. 콘크리트의 휨강도는 『보차도용 콘크리트 인터로킹 블록』KS F 4419의 휨시험 방법으로 측정하였다.4. The flexural strength of concrete was measured by the flexural test method of KS F 4419, Concrete Interlocking Block for Pavement.
① 중앙점 재하법에 따른 콘크리트 휨강도의 계산은 다음 식에 의한다. ① The calculation of the flexural strength according to the center point loading method is to be obtained from the following formula.
5. 공극률시험은 일본콘크리트공학협회의『포러스콘크리트의 공극률시험방법(안)』중 용적법에 준하여 측정하였으며, 다음 식에 의하여 산출하였다.5. The porosity test was measured according to the volumetric method of "porosity test method of porous concrete" of Japan Concrete Engineering Association, and was calculated by the following equation.
6. 콘크리트의 투수계수는 『보차도용 콘크리트 인터로킹 블록』KS F 4419의 투수성 시험방법으로 측정하였다.6. Permeability coefficient of concrete was measured by permeability test method of KS F 4419.
① 투수계수의 계산은 다음 식에 의한다. ① The coefficient of permeability is calculated by the following equation.
7. 콘크리트에 대한 동결융해저항성을 측정하는 시험방법 및 기준은 아직까지 규정되어 있지 않으므로, 본 연구에서는 보통콘크리트의 내동해성 평가에 적용되는 KS F 2456『급속동결융해에 대한 콘크리트의 저항시험방법』중 A법(수중 급속 동결융해시험)을 준용하여 내동해성을 평가하였다. 즉 75× 75× 355 mm의 각주 공시체를 제작하여 23± 2 ℃의 수중에서 양생한 다음, -18 ～ + 4 ℃에서 1일 6사이클로 상대동탄성계수가 60% 이하가 될 때까지 소정의 사이클별로 1차 공명주파수를 측정하여 내동해성을 평가하였다. 7. Test methods and criteria for measuring freeze-thaw resistance to concrete have not yet been defined. Therefore, in this study, KS F 2456 `` Method of resistance test against rapid freeze-thaw '' is applied to evaluation of freeze resistance of ordinary concrete. Freeze thaw resistance was evaluated using the medium A method (quick freeze thawing test). In other words, 75 × 75 × 355 mm footnote specimens were prepared and cured in water at 23 ± 2 ℃, and then cycled by predetermined cycles until the relative dynamic modulus was 60% or less at -18 ～ + 4 ℃ for 6 cycles per day. The primary resonance frequency was measured to evaluate the dynamic resistance.
[[ 제조예Manufacturing example 1] 순환골재의 코팅 1] Coating of circulating aggregate
폐콘크리트를 죠크러셔로 파쇄한 후 8 ~ 13 mm 단일입도의 순환 굵은골재 200kg을 얻었다. 상기 순환 굵은골재 200kg에 물 4kg과 탄화수소계 아크릴수지를 포함하는 침투성 방수제 (크리스톤, 타스(주), 비중 0.98 ± 0.0 5) 200kg 을 혼합한 용액을 침수하여 순화골재를 1차 코팅을 하였다. 1차 코팅 후 23℃ 상온에서 골재의 수분 흡수율이 2%가 되도록 1차 양생하였다.After the waste concrete was crushed with a jaw crusher, 200 kg of circulating coarse aggregate of 8 to 13 mm single particle size was obtained. 200 kg of circulating coarse aggregate was immersed in a solution containing 200 kg of a permeable waterproof agent (Cryston, Tas Co., Ltd., specific gravity 0.98 ± 0.0 5) containing 4 kg of water and a hydrocarbon-based acrylic resin, and then the first fine coating of the purified aggregate. After primary coating, primary curing was performed such that the moisture absorption of the aggregate was 2% at 23 ° C.
상기 1차 코팅 및 양생한 순환 굵은골재 200kg에 물 120kg과 규산나트륨 12kg을 혼합한 용액을 살수하여 2차 코팅을 하였다. 2차 코팅 후 23℃ 상온에서 건조하여 골재의 수분 흡수율이 2%가 되도록 순환골재를 2차 양생하였으며, 제조된 순환골재의 물성은 하기 표 2에 나타내었다.The secondary coating was sprayed by spraying a solution of 120 kg of water and 12 kg of sodium silicate to 200 kg of the primary coating and cured circulating coarse aggregate. After secondary coating, the secondary aggregate was cured to dry at 23 ° C. at room temperature so that the moisture absorption of the aggregate was 2%, and the physical properties of the manufactured aggregate were shown in Table 2 below.
[[ 제조예Manufacturing example 2] 순환골재의 코팅 2] Coating of circulating aggregate
제조예 1과 동일하게 2차 코팅 및 양생하여 제조된 순환골재 200kg를 물 60kg, 메탄올 3kg와 광산화촉진분말 (TiO2분말 함량: 93%이상, 입자크기 0.2~1.0㎛, 비표면적 140cm2/g이상, 밀도 3.0~4.5g/cm3, pH 6~8.5) 3kg을 혼합한 용액을 살수하여 3차 코팅하였다. 상기 3차 코팅 후 23℃ 상온에서 건조하여 골재의 흡수율이 2%가 되도록 3차 양생하였으며, 제조된 순환골재의 물성은 하기 표 2에 나타내었다.As in Preparation Example 1, 200kg of circulating aggregate prepared by secondary coating and curing was treated with 60kg of water, 3kg of methanol and photocatalytic promoting powder (TiO 2 powder content: 93% or more, particle size 0.2 ~ 1.0㎛, specific surface area 140cm 2 / g Above, the density 3.0 ~ 4.5g / cm 3 , pH 6 ~ 8.5) 3kg mixed solution was sprayed and tertiary coating. After tertiary coating, the mixture was dried at room temperature at 23 ° C., and then cured to be 3% of the aggregate. The physical properties of the manufactured recycled aggregate are shown in Table 2 below.
[[ 제조예Manufacturing example 3] 순환골재의 코팅 3] Coating of circulating aggregate
하기 표 1의 함량으로 제조예 1과 동일하게 1차 코팅 및 양생하여 순환골재를 제조하였으며, 제조한 순환골재의 물성을 하기 표 2 에 나타내었다.In the same manner as in Preparation Example 1, the first coating and curing were prepared in the content of Table 1 to prepare a circulating aggregate, and the physical properties of the manufactured circulating aggregate are shown in Table 2 below.
[[ 제조예Manufacturing example 4] 순환골재의 제조 4] Manufacture of recycled aggregate
폐콘크리트를 죠크러셔로 파쇄한 후 8 ~ 13 mm 단일입도의 굵은골재 200kg을 얻었으며, 상기 제조예 1 내지 3의 코팅 및 양생 단계는 수행 하지 않았다. 순환골재의 물성은 하기 표 2에 나타내었다.After crushing the waste concrete with a jaw crusher to obtain 200kg of coarse aggregate of 8 ~ 13 mm single particle size, the coating and curing step of Preparation Examples 1 to 3 was not performed. Physical properties of the circulating aggregate are shown in Table 2 below.
[표 1][Table 1]
[표 2][Table 2]
상기 표 2의 흡수율은 10회 측정하여 얻은 평균값이며, 상기 제조예 1의 표준편차는 ± 0.11%, 제조예 2의 표준편차는 ± 0.10%, 제조예 3의 표준편차는 ± 0.23%, 제조예 5의 표준편차는 ± 0.56%로 각각 측정되었다.Absorption rate of Table 2 is the average value obtained by measuring 10 times, the standard deviation of Preparation Example 1 is ± 0.11%, the standard deviation of Preparation Example 2 is ± 0.10%, the standard deviation of Preparation Example 3 is ± 0.23%, Preparation Example The standard deviation of 5 was measured at ± 0.56%, respectively.
또한 상기 마모율은 3회 측정하여 얻은 평균값이며, 상기 제조예 1은 순환골재의 코팅이 이루어지지 않은 제조예 4에 비하여 마모율의 6.0%, 제조예 2는 6.7%, 제조예 3은 2.2%로 각각 감소하는 것으로 측정되었다. 따라서 순환골재를 코팅하지 않은 경우에 비하여 1차 코팅, 2차 코팅 및 3차 코팅이 이루어질수록 흡수율과 감소하였으며 표준편차 또한 현저하게 감소하는 것으로 나타났다. 마모율의 경우에도 1차 코팅, 2차 코팅 및 3차 코팅이 이루어질수록 순환골재의 경도가 증가됨으로서 마모율이 현저하게 감소하여 코팅하지 않은 순환골재인 제조예 4에 비하여 최대 약 6.7%정도 감소하였다.In addition, the wear rate is an average value obtained by measuring three times, the Preparation Example 1 is 6.0% of the wear rate, 6.7% of Preparation Example 2, 2.2% of Preparation Example 3, respectively, compared to Preparation Example 4 is not coated with the circulation aggregate It was measured to decrease. Therefore, as the primary coating, the secondary coating, and the tertiary coating were made, the absorption rate and the standard deviation were also significantly decreased as compared with the case where the aggregate was not coated. In the case of wear rate, as the primary coating, the secondary coating, and the tertiary coating were made, the hardness of the recycled aggregate was increased so that the wear rate was remarkably reduced, which was reduced by up to about 6.7% compared to the manufacture example 4, which is the non-coated recycled aggregate.
[실시예 1] Example 1
상기 제조예 1에서 제조한 순환 굵은골재 1,450 kg, 흡수율 0.89%, 절대건조 밀도 2.55g/cm2인 천연잔골재 128 kg, 보통포틀랜드 시멘트 345 kg, 물 86 kg, 폴리카본산계 고성능 AE감수제(S사의 ROAECON-PEMA SR5000F) 220g을 옴니믹서에 투입하고 혼합하였다. 상기 제조된 투수성 콘크리트 조성물의 압축강도 및 공극률을 측정하기 위하여 KS F 2403 『콘크리트의 강도 시험용 공시체 제작방법』에 준하여 φ100× 200 mm의 원주형 공시체를 제작하였으며, 내동해성을 측정하기 위하여 75× 75× 355 mm의 각주 공시체를 제작하여 23± 2 ℃의 수중에서 28일 동안 양생하였다. 또한『보차도용 콘크리트 인터로킹 블록』KS F 4419에 따른 콘크리트 블록의 휨강도와 투수계수를 측정하기 위하여 상기 혼합된 혼합물을 성형기에 투입하여 60Hz의 진동과 120kg/cm2압력으로 3sec간 성형하여 탈형하고, 증기양생 단계를 걸쳤다. 상기 증기양생 사이클은 성형체를 양생실에 투입하여 정치단계 3시간, 3시간 동안 60℃까지 승온, 50℃에서 등온 6시간, 상온까지 3시간, 다시 정치 3시간 실시하여 콘크리트블록을 제조하였으며, 그 물성은 하기 표 5에 나타내었다.Circulating coarse aggregate prepared in Preparation Example 1 1450 kg, water absorption rate 0.89%, the absolute dry density of 2.55 g / cm 2 natural residue aggregate 128 kg, ordinary portland cement 345 kg, water 86 kg, polycarboxylic acid-based high-performance AE water reducing agent (S company 220 g ROAECON-PEMA SR5000F) was added to an omni mixer and mixed. In order to measure the compressive strength and the porosity of the prepared water-permeable concrete composition KS F 2403 it was fabricated a columnar specimens of φ 100 × 200 mm in accordance with the "method for manufacturing a concrete strength of the test specimens", 75 to measure the Nae sea component Footnote specimens of × 75 × 355 mm were prepared and cured for 28 days in water at 23 ± 2 ° C. In addition, in order to measure the bending strength and permeability coefficient of the concrete block according to KS F 4419, the mixed mixture was introduced into a molding machine and molded for 3 sec at 60 Hz vibration and 120 kg / cm 2 pressure. , Took the steam curing stage. In the steam curing cycle, the molded body was put into a curing room, and the concrete step was carried out for 3 hours, 3 hours of heating up to 60 ° C., 50 hours of isothermal 6 hours, 3 hours to room temperature, and again 3 hours of standing. Physical properties are shown in Table 5 below.
[실시예 2 ~ 6][Examples 2 to 6]
하기 표 3의 함량으로 실시예 1과 동일한 방법으로 투수성 콘크리트 블록을 제조하였으며, 상기 투수성 콘크리트 블록의 물성은 하기 표 5에 나타내었다.The permeable concrete block was prepared in the same manner as in Example 1 with the content of Table 3, and the physical properties of the permeable concrete block are shown in Table 5 below.
[표 3][Table 3]
[비교예 1]Comparative Example 1
상기 제조예 3에서 제조한 순환 굵은골재 1,450 kg, 흡수율 0.89%, 절대건조 밀도 2.55 g/cm2인 천연잔골재 128 kg, 보통포틀랜드 시멘트 345 kg, 물 86 kg, 폴리카본산계 고성능 AE감수제(S사의 ROAECON-PEMA SR5000F) 220 g 을 옴니믹서에 투입하고 혼합하였다. 상기 제조된 투수성 콘크리트 조성물의 압축강도 및 공극률을 측정하기 위하여 KS F 2403『콘크리트의 강도 시험용 공시체 제작방법』에 준하여 φ100× 200 mm의 원주형 공시체를 제작하였으며, 내동해성을 측정하기 위하여 75× 75× 355 mm의 각주 공시체를 제작하여 23± 2 ℃의 수중에서 28일 동안 양생하였다. 또한『보차도용 콘크리트 인터로킹 블록』KS F 4419에 따른 콘크리트 블록의 휨강도와 투수계수를 측정하기 위하여 상기 혼합된 혼합물을 성형기에 투입하여 60Hz의 진동과 120kg/cm2압력으로 3sec간 성형하여 탈형하고, 증기양생 단계를 걸쳤다. 상기 증기양생 사이클은 성형체를 양생실에 투입하여 정치단계 3시간, 3시간 동안 60℃까지 승온, 50℃에서 등온 6시간, 상온까지 3시간, 다시 정치 3시간 실시하여 콘크리트블록을 제조하였으며, 그 물성은 하기 표 5에 나타내었다.Circulating coarse aggregate manufactured in Preparation Example 3 1450 kg, water absorption rate 0.89%, 128 kg of natural fine aggregates with an absolute dry density of 2.55 g / cm 2 , ordinary portland cement 345 kg, water 86 kg, polycarboxylic acid-based high-performance AE water reducing agent (S company 220 g of ROAECON-PEMA SR5000F) was added to an omnimixer and mixed. In order to measure the compressive strength and the porosity of the prepared water-permeable concrete composition KS F 2403 it was fabricated a columnar specimens of φ 100 × 200 mm in accordance with the "method for manufacturing a concrete strength of the test specimens", 75 to measure the Nae sea component Footnote specimens of × 75 × 355 mm were prepared and cured for 28 days in water at 23 ± 2 ° C. In addition, in order to measure the bending strength and permeability coefficient of the concrete block according to KS F 4419, the mixed mixture was introduced into a molding machine and molded for 3 sec at 60 Hz vibration and 120 kg / cm 2 pressure. , Took the steam curing stage. In the steam curing cycle, the molded body was put into a curing room, and the concrete step was carried out for 3 hours, 3 hours of heating up to 60 ° C., 50 hours of isothermal 6 hours, 3 hours to room temperature, and again 3 hours of standing. Physical properties are shown in Table 5 below.
[비교예 2 ~ 6][Comparative Examples 2 to 6]
하기 표 4의 함량으로 비교예 1과 동일한 방법으로 투수성 콘크리트 블록을 제조하였으며, 상기 투수성 콘크리트 조성물의 물성은 하기 표 5에 나타내었다.To prepare a water-permeable concrete block in the same manner as in Comparative Example 1 with the content of Table 4, the physical properties of the water-permeable concrete composition is shown in Table 5 below.
[표 4][Table 4]
[표 5][Table 5]
상기 표 5의 압축강도는 재령 28일 강도로서 3개의 원주형 공시체를 KS F 2405『콘크리트의 압축강도 시험방법』에 준하여 측정 후의 평균 값이며, 상기 이중 코팅된 순환골재를 포함한 실시예 1 ~ 6의 경우는 비교예 1 ~ 6 에 비하여 현저히 높은 압축강도를 나타내었다. 이는 이중 코팅된 순환골재를 사용할 경우 순환골재의 골재 자체 경도를 현저히 증대시킬 뿐만 아니라 흡수율과 마모율의 감소로 투수성 콘크리트 공시체의 압축강도가 증대되기 때문이다. The compressive strength of Table 5 is the average value after measuring the three cylindrical specimens according to KS F 2405 "Compressive strength test method of concrete" as the 28-day strength, Examples 1 to 6 including the double coated circular aggregate. In the case of, the compressive strength was significantly higher than that of Comparative Examples 1 to 6. This is because when the double coated circulating aggregate is used, the aggregate strength of the circulating aggregate not only increases remarkably, but also the compressive strength of the permeable concrete specimen increases due to the decrease in the absorption rate and the wear rate.
또한 폴리비닐알콜섬유를 혼입할 경우 콘크리트 체적으로 첨가하였기 때문에 내동해성이 현저하게 증대됨을 알 수 있었다. 이는 폴리비닐알콜섬유가 콘크리트 조직내부의 구속력과 인장강도를 증가시키고 동결 및 융해에 의한 골재분리 및 페이스트 탈락을 방지할 뿐만 아니라 고로슬래그 미분말과 플라이애시의 혼입으로 섬유의 분산성이 향상되었기 때문이다. In addition, when the polyvinyl alcohol fiber is added, it can be seen that the resistance to freezing is significantly increased because it is added to the concrete volume. This is because the polyvinyl alcohol fiber increases the binding force and tensile strength in the concrete structure, prevents aggregate separation and paste dropout due to freezing and thawing, and improves the dispersion of the fiber by incorporating blast furnace slag powder and fly ash. .
공극률 및 투수계수는 고로슬래그 미분말, 플라이애시 또는 폴리비닐알콜섬유를 혼입함에 따라 다소 감소하나 거의 차이가 없는 것으로 나타났으며, 투수계수는 모든 경우에 KS F 4419의『보차도용 콘크리트 인터로킹 블록』에 규정된 0.1 mm/sec 이상의 값으로서 모두 만족하는 것으로 나타났다.The porosity and permeability coefficient decreased slightly with the addition of blast furnace slag powder, fly ash or polyvinyl alcohol fiber, but showed little difference. The permeability coefficient was found in KS F 4419's Concrete Interlocking Block for Pavement. All were found to be satisfactory as values of 0.1 mm / sec or more.
이상의 결과로서 이중 코팅된 순환골재를 사용한 투수성 콘크리트 공시체 및 블록의 경우가 코팅하지 않은 순환골재를 사용한 경우에 비하여 압축강도, 휨강도 및 내동해성이 현저하게 증대되어『보차도용 콘크리트 인터로킹 블록』의 성능 규정을 모두 만족하는 것으로 나타나 이중 코팅된 순환골재의 활용이 크게 기대된다.
As a result, the compressive strength, flexural strength, and freeze resistance of the permeable concrete specimens and blocks using the double-coated recycled aggregates were significantly increased compared to the case of the non-coated recycled aggregates. It is expected that the use of double coated recycled aggregates is greatly expected because it satisfies all performance regulations.
Claims (12)
b) 물과 침투성 방수제를 포함한 혼합용액으로 상기 순환 굵은골재와 순환 잔골재를 1차 코팅하고 1차 양생하는 단계;
c) 상기 b) 단계 후 물과 규산염을 포함한 혼합용액으로 2차 코팅하고 2차 양생하여 이중 코팅된 순환 굵은골재와 순환 잔골재를 제조하는 단계;
d) 상기 이중 코팅된 순환 굵은골재, 순환 잔골재 또는 천연잔골재, 결합재, 혼합수 및 혼화제를 혼합하여 혼합물을 제조하는 단계; 및
e) 상기 혼합물을 콘크리트 형틀에 투입하여 성형하고 양생하는 단계;를 포함하고,
상기 d) 단계에서 결합재는 보통포틀랜드 시멘트; 보통포틀랜드 시멘트 20 ~ 99 중량% 와 분말도 4,000 ~ 10,000 cm2/g인 고로슬래그 미분말 1 ~ 80중량%를 포함한 저탄소 2종 혼합시멘트; 보통포틀랜드 시멘트 20 ~ 90 중량%, 4,000 ~ 10,000 cm2/g인 고로슬래그 미분말 1 ~ 65중량% 및 분말도가 3,000 ~ 6,000 cm2/g인 플라이애시 1 ~ 45중량%을 포함하는 저탄소 3종 혼합시멘트; 중에서 선택되는 어느 하나인 것인 투수성 콘크리트 블록의 제조방법. a) crushing the waste concrete to produce circulating coarse aggregate having a particle size of 5 to 10 mm, 8 to 13 mm or 8 to 25 mm and circulating fine aggregate having a particle size of 5 mm or less;
b) first coating and circulating the circulating coarse aggregate and the circulating fine aggregate with a mixed solution containing water and a permeable waterproofing agent;
c) after the step b) the second coating with a mixed solution containing water and silicate and secondary curing to prepare a double coated circular coarse aggregate and circulating fine aggregate;
d) preparing a mixture by mixing the double coated circulating coarse aggregate, circulating fine aggregate or natural fine aggregate, binder, mixed water and admixture; And
e) molding and curing the mixture into a concrete mold;
The binder in step d) is usually portland cement; Low carbon two-mix cement containing 20 to 99% by weight of ordinary Portland cement and 1 to 80% by weight of blast furnace slag powder with a powder degree of 4,000 to 10,000 cm 2 / g; Low-carbon, three-component mixed cements containing 20 to 90% by weight of ordinary Portland cement, 1 to 65% by weight of blast furnace slag 4,000 to 10,000 cm2 / g, and 1 to 45% by weight of fly ash having a powder level of 3,000 to 6,000 cm2 / g. ; Method for producing a water-permeable concrete block which is any one selected from.
상기 b)단계에서 물 : 침투성 방수제를 0.01 ~ 0.99 : 1 중량비로 포함하고, 상기 제 1차 양생 후 수분 흡수율이 0.01 ~ 40%인 투수성 콘크리트 블록의 제조방법.The method of claim 1,
In the step b) comprises a water: permeable waterproofing agent in a weight ratio of 0.01 to 0.99: 1, and the water absorption after the first curing is 0.01 to 40% of a method for producing a water-permeable concrete block.
상기 c)단계에서 물과 규산염을 1 : 0.01 ~ 1 중량비로 포함하는 것인 투수성 콘크리트 블록의 제조방법.The method of claim 1,
Method for producing a water-permeable concrete block containing c and water in the step c) 1: 0.01 to 1 by weight.
상기 침투성 방수제는 탄화수소계 아크릴 수지인 투수성 콘크리트 블록의 제조방법.The method of claim 3, wherein
The permeable waterproofing agent is a method of producing a water-permeable concrete block is a hydrocarbon-based acrylic resin.
상기 결합재는 순환골재 100중량부에 대하여 15 ~ 30 중량부 포함하는 것인 투수성 콘크리트 블록의 제조방법.The method of claim 1,
The binder is a method for producing a water-permeable concrete block containing 15 to 30 parts by weight based on 100 parts by weight of circulating aggregate.
상기 d) 단계에서 이중 코팅된 순환 굵은 골재 100중량부에 대하여, 폴리비닐알콜섬유, 폴리에틸렌섬유 또는 나일론섬유 중에서 선택되는 어느 하나 또는 둘 이상을 혼합한 혼합섬유를 0.001 ~ 0.1 중량부 더 포함하는 투수성 블록의 제조방법.The method of claim 1,
Per 100 parts by weight of the double-coated cyclic coarse aggregate in step d), a pitcher containing 0.001 to 0.1 parts by weight of any one or two or more mixed fibers selected from polyvinyl alcohol fibers, polyethylene fibers or nylon fibers mixed Method of making a castle block.
상기 d) 단계에서 이중 코팅된 순환 굵은골재 100중량부에 대하여, 무수석고, 생석회, 황산칼륨, 황산나트륨, 황산칼슘, 수산화칼륨 또는 수산화나트륨 중에서 선택되는 어느 하나 또는 둘 이상의 혼합물을 0.001 ~ 10 중량부 더 포함하는 것인 투수성 블록의 제조방법.The method of claim 1,
0.001 to 10 parts by weight of any one or two or more selected from anhydrous gypsum, quicklime, potassium sulfate, sodium sulfate, calcium sulfate, potassium hydroxide or sodium hydroxide based on 100 parts by weight of the double coated circular coarse aggregate in step d) Method for producing a water-permeable block further comprising.
상기 c)단계 후 물: 메탄올: 광산화촉진분말을 1 : 0.01 ~ 1 : 0.01 ~ 1 중량비로 혼합한 용액으로 코팅하는 단계를 더 포함하는 투수성 콘크리트 블록의 제조방법.The method of claim 1,
The method of producing a water-permeable concrete block after the step c) further comprising the step of coating with a mixture of water: methanol: photo-oxidation promoting powder in a ratio of 1: 0.01 to 1: 0.01 to 1 by weight.
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