KR100435848B1 - Composite modified asphalt comprising styrene-butadiene-rubber latex and gilsonite, method of producing the same and method of producing composite modified asphalt concrete mixed with the same - Google Patents
Composite modified asphalt comprising styrene-butadiene-rubber latex and gilsonite, method of producing the same and method of producing composite modified asphalt concrete mixed with the same Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/08—Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like
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Abstract
본 발명은 스티렌-부타디엔-라바 라텍스(styrene-butadiene rubber latex, SBR latex) 및 길소나이트(gilsonite)가 일반아스팔트에 첨가된 합성개질 아스팔트, 그의 제조방법 및 상기 합성개질 아스팔트가 포함된 합성개질 아스팔트 콘크리트의 제조방법에 관한 것이다.The present invention is a synthetic modified asphalt, in which styrene-butadiene rubber latex (SBR latex) and gilsonite (gilsonite) are added to general asphalt, a manufacturing method thereof and the synthetic modified asphalt including the synthetic modified asphalt It relates to a manufacturing method of.
본 발명은 국내 침입도 기준 AC 60-70 또는 AC 85-100의 일반아스팔트; 고형분의 함량이 40%∼50% 사이인 스티렌-부타디엔-라바(styrene butadiene rubber, SBR) 라텍스(latex); 및, 길소나이트(gilsonite);가 각각 90중량%∼94중량%, 4중량%∼2중량%, 6중량%∼4중량% 의 배합비율로써 배합되어 형성되는 스티렌-부타디엔-라바 라텍스 및 길소나이트를 첨가한 합성개질 아스팔트, 그의 제조방법 및 그를 포함한 합성개질 아스팔트 콘크리트 제조방법에 관한 것이다.The present invention is a domestic invasion criteria AC 60-70 or AC 85-100 general asphalt; Styrene-butadiene rubber (SBR) latex having a solid content of 40% to 50%; And styrene-butadiene-lava latex and gilsonite, each of which is formed by blending Gilsonite in a blending ratio of 90% by weight to 94% by weight, 4% by weight to 2% by weight, and 6% by weight to 4% by weight, respectively. The present invention relates to a synthetic modified asphalt, a method for producing the same, and a method for manufacturing a synthetic modified asphalt concrete including the same.
아스팔트의 고온 특성을 개질(改質)하는 스티렌-부타디엔-라바(SBR) 라텍스 및 저온 특성을 개질하는 길소나이트를 일반아스팔트에 첨가한 본 발명의 합성개질 아스팔트를 제공함으로써 온도변화에 따라 물성변화가 많은 일반아스팔트를 개질하여 내구성을 향상시키고, 상기 합성개질 아스팔트 및 합성개질 아스팔트 콘크리트의 제조방법을 제공하여 기존의 생산설비를 충분히 활용할 수 있는 수단을 제공하게 되었다.The change of physical properties according to the temperature change is provided by providing the synthetic modified asphalt of the present invention in which styrene-butadiene-lava (SBR) latex for modifying the high temperature property of asphalt and gilsonite for modifying the low temperature property are added to general asphalt. It improves the durability by modifying a lot of general asphalt, and by providing the method for producing the synthetic modified asphalt and synthetic modified asphalt concrete to provide a means to fully utilize the existing production equipment.
Description
본 발명은 합성개질(改質)아스팔트, 그의 제조방법 및 상기 합성개질 아스팔트가 포함된 합성개질 아스팔트 콘크리트의 제조방법에 관한 것이다. 더욱 구체적으로는 스티렌-부타디엔-라바 라텍스(styrene-butadiene rubber latex, SBR latex)및 길소나이트(gilsonite)가 첨가된 합성개질 아스팔트, 그의 제조방법 및 상기 합성개질 아스팔트가 포함된 합성개질 아스팔트 콘크리트 제조방법에 관한 것이다.The present invention relates to a synthetic modified asphalt, a method for producing the same, and a method for producing a synthetic modified asphalt concrete including the synthetic modified asphalt. More specifically, styrene-butadiene rubber latex (styrene-butadiene rubber latex, SBR latex) and gilsonite (synthetic-modified asphalt added to the method, the production method and synthetic modified asphalt concrete production method including the synthetic-modified asphalt) It is about.
일반적으로 아스팔트란 석유를 구성하는 성분 중에서 경질(輕質)부분이 인위적으로 또는 자연적으로 증발하고 남은 흑색 또는 흑갈색의 반고체의 교상물질(膠狀物質)을 칭하는 것로서, 가열하면 서서히 액화하는 물질을 말한다. 아스팔트는 점착성이 크고 광물질 재료와 부착성이 좋기 때문에 결합재료나 접착재료로 이용되고 물에 용해되지 않고 불투수성이므로 방수재료로도 이용된다. 그리고 사용목적에 맞추어 반죽질기를 변화시킬 수 있는, 시공성이 좋은 재료이다. 따라서 아스팔트는 포장용, 댐공사 등에 이용되는 수리(水理)용, 방수용, 공업용 및 농업용 등 그 활용범위가 광범위하다.In general, asphalt refers to a black or black brown semi-solid cross-linked material that remains after the hard part is artificially or spontaneously evaporated from constituents of petroleum. Say. Asphalt is used as a bonding material or adhesive material because of its high adhesiveness and good adhesion with mineral materials, and it is also used as a waterproofing material because it is insoluble in water and insoluble in water. And it is a good workability material that can change the kneading machine according to the purpose of use. Therefore, asphalt has a wide range of applications, such as repair, waterproofing, industrial and agricultural, which are used for paving, dam construction, and the like.
아스팔트를 도로포장에 적용하는 경우를 살펴보면, 아스팔트 그 자체로서 사용하는 예는 드물고, 일반적으로 골재, 충전재 등과 혼합하여 아스팔트 콘크리트로서 사용된다. 골재는 아스팔트 콘크리트 내에서 골조의 작용을 하며, 지지력, 하중의 분산효과, 마찰저항성 등의 역할을 담당한다. 굵은 골재로서는 일반적으로 부순돌, 잔골재로는 강모래가 사용된다. 충전재는 무기물질의 미세분말로서 일반적으로 석회암 분말이 사용된다. 충전재는 잔, 굵은 골재의 공극을 메울 뿐 아니라 아스팔트와 일체로 되어 성질을 개선하는 작용이 있다. 즉, 상기 충전재는 아스팔트 콘크리트 내에서 아스팔트 콘크리트의 강도, 충격저항성을 증가시키는 작용을 한다.In the case of applying asphalt to road pavement, examples of use as asphalt itself are rare, and are generally used as asphalt concrete by mixing with aggregates, fillers and the like. Aggregate acts as a framework in asphalt concrete, and plays a role of supporting force, load distribution effect, and friction resistance. In general, coarse aggregates are used as crushed stone, and steel sand is used as fine aggregates. The filler is generally used limestone powder as fine powder of the inorganic material. The filler not only fills the pores of fine grains and coarse aggregates, but also integrates with asphalt to improve properties. That is, the filler serves to increase the strength and impact resistance of the asphalt concrete in the asphalt concrete.
상기 아스팔트는 명확한 융점 없이, 온도가 상승함에 따라 액화하여 액상(液狀)이 되며 온도에 따라 재료의 물리적 성질 변화가 매우 크다. 이 변화의 정도를감온성이라 하는데 감온성이 지나치게 크면 저온시에는 취성에 의한 균열이 발생하고 고온시에는 심한 연성에 의한 소성변형이 있게 된다. 상기 아스팔트와 골재의 혼합물인 아스팔트 콘크리트의 내구성은 아스팔트의 감온성 외에도 인장강도와 탄성의 정도 등 여러 원인에 의하여 결정된다.The asphalt liquefies as the temperature rises without a clear melting point, and the physical properties of the material change greatly with temperature. The degree of this change is called temperature sensitivity. If the temperature sensitivity is too high, cracks due to brittleness occur at low temperatures, and plastic deformation due to severe ductility at high temperatures. The durability of the asphalt concrete, which is a mixture of the asphalt and the aggregate, is determined by various causes such as the tensile strength and the degree of elasticity in addition to the temperature sensitivity of the asphalt.
본 발명은 각각 고온특성과 저온특성이 있는 스티렌-부타디엔-라바 라텍스 및 길소나이트를 일반아스팔트에 첨가하여 내구성을 향상시킨 합성개질 아스팔트를 제공하기 위한 것이다.The present invention is to provide a synthetically modified asphalt with improved durability by adding styrene-butadiene-lava latex and gilsonite, which have high temperature and low temperature properties, to general asphalt, respectively.
본 발명의 목적은 고온 및 저온에서 각각 아스팔트의 파손을 방지하는 작용을 하는 개질재(改質材)인 스티렌-부타디엔-라바(SBR) 라텍스 및 길소나이트를 일반아스팔트에 첨가함으로써 도로 포장용 아스팔트의 내구성을 보강하는 수단을 제공하는 것이다.An object of the present invention is to add durability of asphalt for paving roads by adding styrene-butadiene-lava (SBR) latex and gilsonite, which are modified to prevent the breakage of asphalt at high and low temperatures, respectively, to general asphalt. It is to provide a means to reinforce.
본 발명의 다른 목적은 기존의 장치를 활용할 수 있는 상기 합성개질 아스팔트 제조방법을 제공하는 것이다.Another object of the present invention is to provide a synthetically modified asphalt manufacturing method that can utilize the existing device.
본 발명의 또 다른 목적은 기존의 장치를 활용할 수 있는 상기 합성개질 아스팔트를 포함하는 합성개질 아스팔트 콘크리트 제조방법을 제공하는 것이다.Still another object of the present invention is to provide a synthetically modified asphalt concrete manufacturing method including the synthetically modified asphalt which can utilize the existing apparatus.
도1은 본 발명의 프리믹스(pre-mix)방식으로 합성개질 아스팔트를 제조하는 공정을 나타낸 흐름도이고,1 is a flow chart showing a process for producing a synthetic modified asphalt by the pre-mix (pre-mix) method of the present invention,
도2는 본 발명의 플랜트믹스(plant-mix)방식으로 합성개질 아스팔트 콘크리트를 제조하는 공정을 나타낸 흐름도이다.Figure 2 is a flow chart showing a process for producing a synthetic modified asphalt concrete by the plant-mix (plant-mix) method of the present invention.
본 발명에 따른 합성개질 아스팔트는 폴리머계열의 스티렌-부타디엔-라바 라텍스와 탄화수소 계열의 천연 아스팔트(asphaltite)인 길소나이트가 일반아스팔트에 소정의 중량비로써 배합되어 형성된다. 상기 일반아스팔트는 국내 침입도 기준 AC 60-70, AC 85-100 중 어느 하나이다. 또한 상기 스티렌-부타디엔-라바 라텍스는 고형분 함량 40%∼50% 인 것을 사용하는데, 이는 여름철과 같은 고온에서 아스팔트 포장의 소성 변형 파손을 방지하여 아스팔트 포장의 내구성을 향상시킨다. 상기 길소나이트는 분말 또는 액상의 것을 사용하는데 이는 겨울철의 저온에서 상기 아스팔트 포장의 취성에 의한 균열이 발생하는 것을 방지하여 아스팔트 포장의 내구성을 향상시키는 작용을 한다. 상기 일반아스팔트, 스티렌-부타디엔-라바 라텍스 및 길소나이트는 각각 90중량%∼94중량%, 4중량%∼2중량%, 6중량%∼4중량% 의 배합비율로써 배합된다.Synthetic-modified asphalt according to the present invention is formed by mixing polymer-based styrene-butadiene-lava latex and gilsonite, a hydrocarbon-based natural asphalt (asphaltite), in a predetermined weight ratio. The general asphalt is any one of AC 60-70 and AC 85-100 based on domestic penetration. In addition, the styrene-butadiene-lava latex has a solid content of 40% to 50%, which prevents plastic deformation failure of the asphalt pavement at high temperatures such as summer, thereby improving durability of the asphalt pavement. The gilsonite is used in the form of powder or liquid, which prevents cracking due to brittleness of the asphalt pavement at low temperatures in winter, thereby improving durability of the asphalt pavement. The general asphalt, styrene-butadiene-lava latex and gilsonite are each formulated in a blending ratio of 90% by weight to 94% by weight, 4% by weight to 2% by weight, and 6% by weight to 4% by weight.
본 발명의 합성개질 아스팔트 제조방법 및 합성개질 아스팔트 콘크리트의 제조방법을 첨부된 도면을 참조하여 설명한다.A method for producing synthetic modified asphalt and a method for preparing synthetic modified asphalt concrete of the present invention will be described with reference to the accompanying drawings.
도1은 본 발명의 합성개질 아스팔트를 프리믹스(pre-mix)방식으로 제조하는 방법을 나타낸 제조공정 흐름도이다. 상기 프리믹스 방식의 아스팔트 제조방법은 아스팔트 콘크리트의 일 구성요소인 골재와 아스팔트를 혼합하기 전에 개질(改質)재로서의 상기 스티렌-부타디엔-라바 라텍스 및 길소나이트를 아스팔트에 혼합시켜 아스팔트를 개질시키는 방법으로서, 품질관리 측면과 기존의 생산설비를 충분히 활용한다는 측면에서 유리한 제조방법이다. 상기 프리믹스 방식의 생산설비는 재료를 혼합할 수 있는 혼합탱크, 혼합탱크 외부에서 구동되는 스크류(screw)와 같은 혼합장치, 액상 및 분말 형태의 재료를 분사할 수 있는 장치, 온도제어가 가능한 가열장치, 온도 감지 센서 및 투입재료의 계량장치 등이 필요하다.1 is a manufacturing process flow diagram illustrating a method for producing a synthetic modified asphalt of the present invention by a pre-mix method. The premix asphalt production method is a method of modifying the asphalt by mixing the styrene-butadiene-lava latex and gilsonite as a modifying material before mixing the aggregate and asphalt, which is one component of asphalt concrete, It is an advantageous manufacturing method in terms of quality control and utilization of existing production equipment. The premix production equipment is a mixing tank capable of mixing materials, a mixing device such as a screw driven outside the mixing tank, a device capable of injecting liquid and powder materials, a heating device capable of temperature control. In addition, a temperature sensor and a weighing device for input materials are required.
본 발명의 일반아스팔트, 스티렌-부타디엔-라바 라텍스 및 길소나이트는 각각 90중량%∼94중량%, 4중량%∼2중량%, 6중량%∼4중량% 의 배합비율로 각 공정별로 개량되어 투입된다. 국내 침입도 기준 AC 60-70 또는 AC 85-100의 일반아스팔트를 액상(液狀)이 되도록 135℃ 이상으로 가열한 후 계량하여 혼합탱크에 투입한다. 상기 혼합탱크에서 다시 가열되어 온도범위 160℃∼180℃를 유지하도록 하고, 투입 후 상기 온도에 도달하기까지의 소요시간은 20분을 초과하지 않도록 한다. 그리고 상기 배합비율에 맞도록 계량된 분말 또는 액상의 길소나이트를 노즐(nozzle) 등의 설비로써 분사하는 방식으로 10분∼20분 동안 상기 혼합탱크에 투입하면서 외부 구동 회전장치인 스크류(screw)를 회전시켜 상기 일반아스팔트와 혼합시킨다. 상기 혼합과정 후 액상의 스티렌-부타디엔-라바 라텍스를 분사방식으로 상기 혼합탱크에 투입하면서 상기 스크류를 회전시켜 상기 일반아스팔트와 길소나이트에 첨가, 혼합시킨다. 상기 투입, 혼합시간은 20분을 초과하지 않도록 한다. 상기와 같이 길소나이트와 스티렌-부타디엔-라바 라텍스를 분사방식으로 혼합시키는 이유는 다른 구성요소와 균일하게 혼합될 수 있도록 하기 위함이다. 상기 길소나이트 및 스티렌-부타디엔-라바 라텍스의 투입, 혼합 공정이 완료되면 상기 스크류를 회전시키면서 약 15분간 혼합탱크에서 거치시킨다. 상기 과정은 아스팔트 내에 남아있는 수분을 제거하기 위한 최종 양생 과정이다. 상기 일반아스팔트가 혼합탱크에 투입되면서부터 혼합공정이 완료될 때까지, 혼합탱크 내부의 온도는 항상 160℃∼180℃ 의 범위를 벗어나지 않도록 하여야 하며 외부공기가 혼합탱크 내부로 유입되지 않도록 한다.아스팔트의 노화는 온도와 외부공기와의 접촉에 영향을 많이 받기 때문이다. 그리고 상기와 같이 가열시간을 한정한 이유는 아스팔트가 오랜 시간 가열되면 산화현상이 일어나기 때문이다.General asphalt, styrene-butadiene-lava latex, and gilsonite of the present invention are improved by each process at a compounding ratio of 90% by weight to 94% by weight, 4% by weight to 2% by weight, and 6% by weight to 4% by weight, respectively. do. Normal asphalt of AC 60-70 or AC 85-100 in Korea shall be heated to 135 ℃ or above to be liquid and weighed and put into mixing tank. Heated again in the mixing tank to maintain a temperature range of 160 ° C to 180 ° C, and the time required to reach the temperature after the addition does not exceed 20 minutes. Then, a screw, which is an external drive rotating device, is injected into the mixing tank for 10 minutes to 20 minutes by spraying powder or liquid gilsonite that is measured according to the blending ratio with a facility such as a nozzle. Rotate and mix with the general asphalt. After the mixing process, the liquid styrene-butadiene-lava latex is added to the general asphalt and gilsonite by rotating the screw while being injected into the mixing tank by spraying. The dosing and mixing time should not exceed 20 minutes. As described above, the reason for mixing gillsonite and styrene-butadiene-lava latex by spraying is to allow uniform mixing with other components. When the gilsonite and styrene-butadiene-lava latex are added and mixed, the screw is rotated and placed in a mixing tank for about 15 minutes. This is the final curing process to remove the water remaining in the asphalt. The temperature inside the mixing tank should always be within the range of 160 ° C to 180 ° C and the outside air will not flow into the mixing tank until the general asphalt is added to the mixing tank and the mixing process is completed. This is because aging is highly affected by temperature and contact with outside air. The reason for limiting the heating time as described above is that oxidation occurs when the asphalt is heated for a long time.
도2는 본 발명에 따른, 플랜트믹스(plant-mix)방식으로 합성개질 아스팔트 콘크리트를 제조방법을 나타낸 흐름도이다. 상기 플랜트 믹스 방식은 아스팔트 콘크리트 제조 플랜트에서, 아스팔트와 골재를 믹스시키면서 개질재인 스티렌-부타디엔-라바 라텍스 및 길소나이트를 직접 투입하여 혼합함으로써 아스팔트를 개질시켜 합성개질 아스팔트 콘크리트를 제조하는 방법이다.Figure 2 is a flow chart showing a method for producing a synthetic modified asphalt concrete in a plant-mix (plant-mix) method, according to the present invention. The plant mix method is a method for producing a synthetic modified asphalt concrete by modifying the asphalt by mixing the asphalt and aggregate in the asphalt concrete manufacturing plant, while directly mixing the modified styrene-butadiene-lava latex and gilsonite.
상기 합성개질 아스팔트 콘크리트에 배합되는 일반아스팔트, 스티렌-부타디엔-라바 라텍스 및 길소나이트의 배합비율은 상기와 같이, 각각 90중량%∼94중량%, 4중량%∼2중량%, 6중량%∼4중량% 로서 각 공정별로 개량되어 투입된다. 골재와 합성개질 아스팔트의 배합비율은 현장의 여건에 따라 변할 수 있다. 우선 체가름(hot screen)으로 쇄석, 부순모래 등의 골재를 가열하면서 입도별로 구분하여 하트빈(hot bin)에 저장한다. 상기 하트빈은 골재를 뜨겁게 유지시키면서 저장할 수 있는 장치로서 보통 입도 별로 가열 골재를 구분, 저장할 수 있도록 되어 있다. 상기 하트빈에 저장된 골재를 골재 계량장치로써 계량하고 혼합탱크로 이송하는 과정에서 분말 상태의 길소나이트를 상기 골재에 투입하여 혼합시킨다. 그리고 상기 길소나이트와 혼합된 골재를 믹서에 투입한다. 상기 믹서에 석분을 투입하여 골재 및 길소나이트를 혼합한다. 상기 혼합된 골재에 액상의 일반아스팔트를 분사방식으로 30∼40초 동안 직접 골재와 혼합시킨다. 상기 일반아스팔트의 분사, 혼합공정이완료되면 액상의 스티렌-부타디엔-라바 라텍스를 분사방식으로 1분∼1분20초 동안 직접 골재와 혼합시킨다. 상기의 일반아스팔트와 스티렌-부타디엔-라바 라텍스를 분사방식으로 혼합시키는 이유는 상기 골재에 균질하게 피복되면서 골재간의 결합력을 향상시키기 위함이다. 상기의 제조 과정에서는 온도 관리가 매우 중요한 요소로서, 골재 가열부터 최종 생산시까지 175℃∼185℃를 유지할 수 있도록 한다.The blending ratios of general asphalt, styrene-butadiene-lava latex, and gilsonite blended in the synthetic modified asphalt concrete are 90 wt% to 94 wt%, 4 wt% to 2 wt%, and 6 wt% to 4 wt% as described above. It is added and improved by each process as weight%. The blending ratio of aggregate and synthetic modified asphalt may vary depending on site conditions. First, the aggregates such as crushed stone, crushed sand, etc. are heated with a sieve (hot screen) and classified by particle size and stored in a hot bin. The heart bean is a device capable of storing the aggregate while keeping it hot, and is capable of classifying and storing heating aggregates by particle size. In the process of measuring the aggregate stored in the heart bin with an aggregate metering device and transporting it to the mixing tank, powdered gilsonite is added to the aggregate and mixed. And the aggregate mixed with the gilsonite is put into the mixer. Stone powder is added to the mixer to mix aggregates and gilsonite. The liquid mixture is directly mixed with the aggregate for 30 to 40 seconds by spraying the general asphalt as a liquid to the mixed aggregate. When the injection and mixing process of the general asphalt is completed, the liquid styrene-butadiene-lava latex is directly mixed with aggregate for 1 minute to 1 minute and 20 seconds by spraying. The reason for mixing the above general asphalt and styrene-butadiene-lava latex is to improve the bonding strength between the aggregates while being uniformly coated on the aggregates. Temperature control is a very important factor in the manufacturing process, it is possible to maintain from 175 ℃ to 185 ℃ from the aggregate heating to the final production.
상기 합성개질 아스팔트 콘크리트의 플랜트 믹스방식 제조방법은 기존의 배치식 아스팔트 플랜트 장치를 사용하면서 일부 개질재 첨가 장비의 설치를 통하여 실현 가능함으로 경제성이 우수한 제조방법이다.The method for producing a plant mix of synthetically modified asphalt concrete is economical because it can be realized through the installation of some modifier addition equipment while using an existing batch asphalt plant apparatus.
본 발명은 합성개질 아스팔트, 합성개질 아스팔트 제조방법 및 합성개질 아스팔트 콘크리트 제조방법으로서, 고온 및 저온특성의 아스팔트 개질재(改質材)인 스티렌-부타디엔-라바(SBR) 라텍스 및 길소나이트를 일반아스팔트에 첨가함으로써 내구성을 향상시키고, 기존의 제조장치를 충분히 활용할 수 있는 수단을 제공한다.The present invention is a synthetic modified asphalt, synthetic modified asphalt production method and synthetic modified asphalt concrete manufacturing method, the high temperature and low temperature properties of the asphalt modifier styrene-butadiene-lava (SBR) latex and gilsonite general asphalt In addition, the present invention provides a means for improving durability and making full use of existing manufacturing apparatus.
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| KR101868906B1 (en) | 2018-03-09 | 2018-06-19 | 한국휴로드(주) | Impregnated Asphalt Modifier and Multifunctional Asphalt Mixture containing the same |
| KR102131053B1 (en) | 2020-03-09 | 2020-07-09 | 주식회사 정원화학 | A composition for concrete confusion comprising styrene-acrylate synthetic latex and a manufacturing method thereof |
| US10882994B2 (en) | 2013-02-19 | 2021-01-05 | Jung Do HUH | Highly visco-elastic warm-mix modifier composition and their manufacturing method thereof; and compositions of virgin and recycled modified warm-mix asphalt concrete mixtures and their manufacturing method thereof |
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| KR101868906B1 (en) | 2018-03-09 | 2018-06-19 | 한국휴로드(주) | Impregnated Asphalt Modifier and Multifunctional Asphalt Mixture containing the same |
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