摘要:
The present invention relates to an inorganic grouting material with enhanced densification and watertightness of an existing inorganic grouting material by mixing inorganic grouting materials and microorganisms which are able to form fine calcium carbonate powder and making the microorganisms form calcium carbonate particles among microcracks and micropores in the inorganic grouting material; a method for manufacturing the same, and a method for repairing concrete cracks using the material. The method for manufacturing the inorganic grouting material and a method for repairing the concrete cracks using the same according to the present invention comprise: a step of adding urea to water and preparing a culture medium (S1); a step of adding microorganisms into the culture medium, which forms calcium carbonate, culturing the microorganisms until the concentration of the microorganisms in the culture medium is optimized, and generating a proper culture medium (S2); a step of adding inorganic particles such as cement or geopolymers to the proper culture medium (S3); a injecting the microorganism-mixed inorganic grouting material into the concrete cracks and curing the grouting material (S4); and a step of making the surface of the cured grouting material come in contact with a solution containing urea as a carbonate ion source and a calcium source and incubating for a predetermined time and promoting fine calcium carbonate powder of the microorganisms (S5). [Reference numerals] (AA) Start;(BB) Prepare an inorganic grouting material;(CC) Concentration of microorganisms = set concentration ?;(DD) Repair concrete cracks;(EE) End;(S1) Prepare a culture medium;(S2) Add and culture the microorganisms;(S3) Add inorganic particles into a proper culture medium;(S4) Inject/cure the grouting material to concrete cracks;(S5) Apply urea and a calcium source on the surface of the grouting material
摘要:
PURPOSE: A concrete placing apparatus is provided to effectively place concrete in a high-rise building by minimizing the vertical transfer distance of the concrete using multiple conveyors. CONSTITUTION: A concrete placing apparatus comprises multiple conveyor units(10), a concrete tank(20), and a pumping unit. The conveyor units are spirally installed in a vertical mast(2) of a tower crane(1) and convey concrete. The concrete tank is connected to the uppermost conveyor unit and receives concrete from the uppermost conveyor unit. The pumping unit sends concrete stored in the concrete tank to a concrete placing position.
摘要:
PURPOSE: A user input interface device of a portable terminal and a method thereof are provided to implement intuitive input such as mouse input by generating a pointer of the portable terminal through marker recognition and executing functions of the portable terminal based on the same. CONSTITUTION: A memory(210) stores information about patterns of markers. If the marker is recognized in the outside of a portable terminal, a marker recognizing unit(220) displays a pointer on a display unit of the portable terminal corresponding to a recognized position of the marker. The marker recognizing unit moves the pointer on the display unit according to the movement of the marker and recognizes a pattern change of the marker. An operation unit(230) operates functions of the portable terminal according to the pattern change of the marker. [Reference numerals] (200) User interface; (210) Memory; (220) Marker recognizing unit; (230) Operation unit; (240) Function mapping unit; (250) Display unit
摘要:
PURPOSE: A method for constructing a smart highway comprising a cable-laid smart bottom is provided to automatically transfer information or power to a receiver. CONSTITUTION: A method for constructing smart highway comprises: a step of forming a concrete bottom plate extended in a longitudinal direction; a step of aligning a spacer(15) for obtaining the thickness of reinforced bar cover from the bottom of the concrete bottom plate; a step of placing plural reinforced bars(12) in traverse direction; a step of placing a cable protection tube(13) extended to the longitudinal direction; a step of placing a cable protection tube extended to the longitudinal direction; and a step of placing the cable(14) to the longitudinal direction in the cable protection tube.
摘要:
PURPOSE: An electromagnetic wave shield concrete member using a metal foil is provided to shied electromagnetic wave using a metal thin film, such as an aluminum thin film. CONSTITUTION: An electromagnetic wave shield concrete member(1) using a metal foil comprises multiple concrete layers(2,4) and a metal thin film(3). The metal thin film is arranged between the concrete layers, and has a penetration part. Also the metal thin film has an excellent electromagnetic wave shield effect.
摘要:
본 발명은 요소분해 기능을 가지는 미생물에 의해서 탄산칼슘 결정을 생성시키고, 생성된 탄산칼슘 결정을 미분말로 제조한 후, 이를 몰탈 및 기타 시멘트 복합재료에 혼입함으로써 수화열을 개선함과 동시에 유동성을 현저하게 증가시킬 수 있는 미생물을 이용한 탄산칼슘 미분말의 제조방법과, 이 제조방법에 의해 제조된 탄산칼슘 미분말을 함유하는 시멘트 몰탈에 관한 것이다. 본 발명에 따른 탄산칼슘 미분말의 제조방법은, 물에 요소를 첨가하여 배양액을 준비하는 단계(S1)와, 상기 배양액에 요소분해 기능의 미생물을 투입하고, 배양액 내의 미생물 농도가 포화될 때까지 배양하여 포화 배양액을 생성하는 단계(S2)와, 상기 포화 배양액에 칼슘원을 첨가하여 칼슘 첨가 배양액을 만드는 단계(S3)와, 상기 칼슘 첨가 배양액을 설정 시간 동안 방치하여 요소분해기능의 미생물이 탄산칼슘을 석출하도록 하는 단계(S4)와, 상기 칼슘 첨가 배양액을 건조시켜 탄산칼슘 고형물을 추출하는 단계(S5)와, 탄산칼슘 고형물을 분쇄하는 분말화하는 단계(S6)로 이루어진 것을 특징으로 한다.
摘要:
본 발명은 전기적 성질을 갖는 탄소나노튜브를 혼입하여 외부응력 및 변형에 대해 내부 전기저항이 변화하는 압저항 특성(piezoresistivity)을 갖도록 시멘트 페이스트 및 그 제조방법에 관한 것으로, 본 발명의 시멘트 페이스트 제조방법은, 탄소나노튜브와 실리카퓸을 혼합하여 설정 시간 동안 1차 건비빔하는 단계와; 상기 1차 건비빔된 탄소나노튜브-실리카퓸 혼합물에 시멘트를 첨가하여 설정 시간 동안 2차 건비빔하는 단계와; 상기 2차 건비빔된 탄소나노튜브-실리카퓸-시멘트 혼합물에 물을 첨가하여 설정 시간 동안 비빔하는 단계를 포함한다.
摘要:
PURPOSE: A manufacturing method of cement paste having electrical properties and a cement structure manufacturing method by using the cement paste manufactured by the same are provided to give piezoresistivity to the cement paste by mixing the carbon nanotubes having electrical properties into the cement paste. CONSTITUTION: A cement paste uses carbon nanotubes, silica fume, and cement as main components. The carbon nanotube content is 0.1-0.45 wt% based on the weight of the cement. The silica fume content is 10-30 wt% based on the weight of the cement. The carbon nanotube is a multi-wall carbon nanotube. A manufacturing method of the cement paste comprises the following steps: (S1) mixing the carbon nanotubes with silica fume and first dry mixing the same for a predetermined time; (S2) adding cement to the first dry mixed carbon nanotube-silica fume mixture and second dry mixing the same for a predetermined time; and (S3) adding water to the second dry mixed carbon nanotube-silica fume-cement mixture and mixing for a predetermined time. [Reference numerals] (AA) Start; (BB) End; (S1) Dry mix carbon nanotube-silica fume; (S2) Dry mix carbon nanotube-silica fume-cement; (S3) Add water and mix