Abstract:
본 발명은 회전 운동하는 내측 드럼과 외측 드럼의 이중 구조로 이루어져 골재를 외측 드럼에서 내측 드럼으로 전달하면서 이중으로 가열하여 건조할 수 있도록 한 골재 건조용 이중 구조 드라이어에 관한 것으로, 본 발명의 골재 건조용 이중 구조 드라이어는, 전단부에 골재가 투입되는 투입구가 형성되어 있는 외측 드럼과; 상기 외측 드럼 내부에 외측 드럼과 동축 상으로 설치되어 외측 드럼과 함께 회전 운동하도록 설치되며, 후단부에 상기 외측 드럼에서 낙하한 골재가 유입되도록 전달통로가 개방되게 형성되고, 전단부에 골재가 배출되는 배출통로가 형성되어 있는 내측 드럼과; 상기 외측 드럼의 후단부에 설치되어, 외측 드럼의 후단부로 이동한 골재를 퍼올려서 상부에서 골재를 낙하시키는 골재상승부재와; 상기 외측 드럼을 회전시키는 구동수단과; 상기 외측 드럼 및 내측 드럼의 골재를 가열하는 가열수단을 포함하는 것을 특징으로 한다.
Abstract:
본 발명은 유리섬유 복합 보강재료와 이를 이용한 아스팔트 혼합물 및 그 제조방법에 관한 것으로, 경제적이면서 우수한 물리적인 특성을 가지는 유리섬유 파분을 펠렛 또는 입자 형태로 한 파분 보강재와, 여러 가닥의 유리섬유를 폴리프로필렌 수지로 코팅하여 다발형으로 만든 섬유 보강재를 혼합한 구성으로 제작하여 가열 아스팔트혼합물에 첨가함으로써, 간편하게 현장 플랜트에서 투입이 가능하며, 생산된 가열 아스팔트 혼합물 내에서 섬유의 뭉침 현상을 방지하여 아스팔트의 성능을 개선할 수 있도록 한 것이다.
Abstract:
The present invention relates to an eco-friendly bio polyurethane binder composition using vegetable oil/polyol that may be combined to a wrapping material or a construction material of a location requiring eco-friendly properties such as parking lots, sidewalks, parks, etc. The eco-friendly bio polyurethane binder composition according to the present invention includes: a base composed of 30 to 70 parts by weight of bio oil/polyol, 5 to 20 parts by weight of hard polyol having a molecular weight of 1000 to 6000 and 2 to 3 functional groups, 0 to 0.5 parts by weight of a gelling catalyst, 0.2 to 2 parts by weight of an antifoaming agent and 5 to 10 parts by weight of a moisture absorbent, in which the viscosity of the base is 700 to 1300 cps/23°C; and a hardener formed by an isocyanate compound and having an NCO content of 30 to 32 wt%, a viscosity of 20 to 250 cps/23°C, a specific gravity of 1.20 to 1.25 and a functionality of 2 to 3, wherein the mixing ratio of the base and the hardener is 100 : 30-100.
Abstract:
PURPOSE: A device for measuring compaction density of asphalt pavement is provided to be completely adhered to an asphalt surface using an electromagnetic field. CONSTITUTION: A device(210) for measuring compaction density of asphalt pavement comprises a compaction density measuring unit(212), an antenna unit, a pressure sensor unit(214), and an elastic auxiliary member(215). The compaction density measuring unit measures compaction density of asphalt(211) using the correlation of a density change and a permittivity change. The antenna unit measures the permittivity of the asphalt. The pressure sensor unit transfers pressure data to the compaction density measuring unit. The elastic auxiliary member is adhered to the asphalt by external force.
Abstract:
A modified asphalt binder composition, and a method for preparing the modified asphalt binder composition are provided to improve workability, high temperature sintering deformation resistance and low temperature crack resistance and to enhance the quality of construction and the lifetime of pavement. A modified asphalt binder composition comprises 82-89 wt% of base asphalt; 10-15 wt% of a waste tire rubber powder; and 1-3 wt% of a polyethylene wax. Preferably the waste tire rubber powder has a particle size of 120 mesh. The modified asphalt binder composition is prepared by heating base asphalt; mixing the heated base asphalt and a polyethylene wax; and mixing the obtained one with a waste tire rubber powder.
Abstract:
PURPOSE: Carbon dioxide absorbent using recycled waste materials and concrete including the same are provided to be cost effectively prepared by mixing an industrial byproduct with an additive selected from a group including minerals, cement, and the combination of the same. CONSTITUTION: Carbon dioxide absorbent using recycled waste materials includes tailing or an industrial byproduct and an additive. The surface of the tailing or industrial byproduct is reformed based on a basic solution. The additive is selected from a group including minerals, cement, and the combination of the same. The weight ratio of the tailing or the industrial byproduct and the additive is 9:1 to 6:4. The tailing or the industrial byproduct is fly ash, waste tire, blast furnace slag, collected dust, or the combination of the same. [Reference numerals] (AA) Fly ash/Ca(OH)_2 + cement (example 1); (BB) Fly ash/Ca(OH)_2 + LDH (example 2); (CC) Fly ash + cement (comparative example); (DD) Time(min)
Abstract:
본 발명은 유리섬유 복합 보강재료와 이를 이용한 아스팔트 혼합물 및 그 제조방법에 관한 것으로, 경제적이면서 우수한 물리적인 특성을 가지는 유리섬유 파분을 펠렛 또는 입자 형태로 한 파분 보강재와, 여러 가닥의 유리섬유를 폴리프로필렌 수지로 코팅하여 다발형으로 만든 섬유 보강재를 혼합한 구성으로 제작하여 가열 아스팔트혼합물에 첨가함으로써, 간편하게 현장 플랜트에서 투입이 가능하며, 생산된 가열 아스팔트 혼합물 내에서 섬유의 뭉침 현상을 방지하여 아스팔트의 성능을 개선할 수 있도록 한 것이다.
Abstract:
PURPOSE: Bicomponent synthetic fiber for hot-mix asphalt, a fiber reinforced hot-mix asphalt mixture and a production method of the asphalt mixture are provided to produce economical efficiency and good physical property of the mixture. CONSTITUTION: Bicomponent synthetic fiber(10) for hot-mix asphalt is molded by mixing thermoplastic first resin having a melting point of 160~170 °C and thermoplastic second resin having the melting point of 250~260°C. The bicomponent synthetic fiber has the tensile strength of 2,500~10,000 kgf/cm^2, tensile elongation of 10~20%, an elastic coefficient of 30,000~300,000 kgf/cm^2, specific gravity of 0.80~0.95, thickness of 0.3~0.5 mm, length of 20~60 mm etc. The bicomponent synthetic fiber has an embossed pattern(12) by pressing the top and the bottom surfaces.
Abstract translation:目的:提供混合沥青双组分合成纤维,纤维增强热拌沥青混合料和沥青混合料的生产方法,以提高混合料的经济效益和良好的物理性能。 构成:混合沥青的双组分合成纤维(10)通过混合熔点为160〜170℃的热塑性第一树脂和熔点为250〜260℃的热塑性第二树脂而成型。 双组分合成纤维的拉伸强度为2500〜10000 kgf / cm ^ 2,拉伸伸长率为10〜20%,弹性系数为30,000〜30万kgf / cm ^ 2,比重为0.80〜0.95,厚度为0.3〜 0.5mm,长度20〜60mm等。双组分合成纤维通过按压顶部和底部表面具有压花图案(12)。