Abstract:
The present invention comprises: 3-28 wt% of cement based binding agent; 28-62 wt% of fine aggregate; 20-55 wt% of coarse aggregate; 0.1-10 wt% of water; and 0.1-15 wt% of polymer based binding agent. The polymer based binding agent comprises: 10-70 wt% of styerene ; 10-45 wt% of butyl acrylate; 5-35 wt% of ethyl acrylate; 0.1-20 wt% of itaconic acid; and 0.1-20 wt% of poly methyl acrylate. The cement based binding agent usually comprises: 20-80 wt% of Portland cement; 10-60 wt% of amorphous calcium aluminate; 0.1-10 wt% of calcium alumna cement; 0.01-10 wt% of gypsum; 0.01-20 wt% of gellite powder; 0.01-10 wt% of powder water repellent; and 0.01-10 wt% of moldenite. The concrete composite of the present invention can improve workability and durability of the concrete, especially degradation of the concrete can be reduced by improving flexural rigidity, tensile strength, early age strength and long age strength.
Abstract:
The present invention relates to an ultra rapid hardening cement concrete composition with enhanced durability, and a road pavement maintenance method using the same, wherein the composition is characterized by comprising 3-30 wt% of ultra rapid hardening cement, 25-65 wt% of fine aggregate, 25-65 wt% of coarse aggregate, 0.1-15 wt% of water and 0.1-15 wt% of cement emulsion for mixing cement, and the cement emulsion for mixing cement additionally comprises 20-95 wt% of styrene-acryl emulsion, 0.1-70 wt% of butyl-acryl emulsion, 0.01-50 wt% of styrene-butadiene emulsion, 0.01-50 wt% of styrene-butadiene rubber latex, 0.01-50 wt% of ethylene-vinyl acetate emulsion, 0.01-50 wt% of polyacryl ester emulsion, 0.01-50 wt% of epoxy emulsion and 0.01-50 wt% of methyl metahcrylate emulsion. Present invention can improve workability and enhance strength and durability as well as reduce concrete errors and reduce the amount of a polymer used.
Abstract:
The present invention relates to a powdery high intensity enhancer composition for concrete which is prepared by mixing reformed blast furnace slag and reformed anhydrous gypsum, wherein the blast furnace slag is reformed by sodium meta silicate and sodium tripolyphosphate and anhydrous gypsum is reformed by triethanol amine. A powdery high intensity enhancer for concrete can reduce the use amount of cement by improving durability and strength.
Abstract:
PURPOSE: A polymer-modified concrete composition is provided to obtain uniform quality by controlling curing period and strength by control mixing weight ratio. CONSTITUTION: A polymer-modified concrete composition comprises 15-20 weight% of quick curable cement, 1-4 weight% of a polymer solid phase, 35-49 weight% of fine aggregate, 30-44 weight% of a thick aggregate, and 5-8 weight% of water. The quick curable cement comprises calcium sulfo aluminate, calcium aluminate, and normal cement. The content of the calcium aluminate is 5-15 weight% based on 100.0 weight% of the quick curable cement. [Reference numerals] (AA) First cutting; (BB) Second cutting; (CC) Cleaning; (DD,GG) Coating a surface reinforcing agent; (EE) Pouring concrete; (FF) Finishing a surface; (HH) Curing;
Abstract:
PURPOSE: A high intensity GEO polymer composition and a manufacturing method thereof are provided to improve initial and post compressive strength by adding potassium silicate solution to a mixture of fly ash, amorphous, and aluminosilicate. CONSTITUTION: A manufacturing method of a high intensity GEO polymer composition comprises next steps: mixing fly ash and amorphous aluminosilicate in a weight ratio of 80:20-20:80; stirring at high speed after adding 1-5 weight% of a reaction controller to the mixture; and adding 30-50 parts by weight of modified liquid potassium silicate to 100.0 parts by weight of the mixture. The modified liquid potassium silicate comprises 30-80 weight% of potassium silicate, 5-30 weight% of potassium hydroxide, and 15-60 weight% of water. The reaction controller includes sewage sludge incineration ash and NaCl in weight ratio of 8.0-9.0:1.0-2.0.
Abstract:
PURPOSE: A rapid-hardening concrete composition is provided to modify the pore structure of a latex modified concrete by mixing ultrafine fly ash with concrete. CONSTITUTION: A rapid-hardening concrete composition includes 144-360 kg/m^3 of rapid-hardening cement, 18-72 kg/m^3 of ultrafine fly ash, 37.5-112.5 kg/m^3 of latex, 820-850 kg/m^3 of fine aggregate, and 860-890 kg/m^3 of coarse aggregate. The fineness of the ultrafine fly ash is more than or equal to 6000 cm^2/g. The rate of water and cement is between 28 and 48 parts by weight. The rapid-hardening concrete composition further includes 0.1-30 parts by weight of calcium hydroxide and 0.1-2.0 parts by weight of retarder.
Abstract translation:目的:提供快速硬化混凝土组合物,通过混合超细粉煤灰与混凝土来改变胶乳改性混凝土的孔结构。 构成:快速硬化混凝土组成包括快速硬化水泥144-360 kg / m 3,超细粉煤18-72 kg / m ^ 3,胶乳37.5-112.5 kg / m ^ 3,胶体820-850 kg / m ^ 3的细骨料,860-890kg / m ^ 3的粗骨料。 超细粉煤灰的细度大于或等于6000 cm ^ 2 / g。 水和水泥的比例在28至48重量份之间。 快硬化混凝土组合物还包含0.1-30重量份的氢氧化钙和0.1-2.0重量份的缓凝剂。
Abstract:
건설물이 수명을 다하고 해체될 때 폐콘크리트에서 발생하는 순환 잔골재의 경우는 천연 골재에 비해 골재 표면에 부착되어 있는 시멘트 모르터 및 이물질 등에 의한 품질저하로 말미암아 실무적용에는 많은 제한이 따르고 있다. 아울러, 제철소에서 발생하는 산업부산물인 고로슬래그 미분말의 경우는 콘크리트 혼화재로서 수화열 저감, 장기강도 증진, 수밀성 증대 등의 개선효과를 가지는 반면, 잠재 수경성 반응으로 인한 초기 수화반응 지연현상 및 알칼리 소비에 따른 중성화 촉진 등의 문제점을 내포하고 있다. 따라서, 본 발명은 KS F 4004의 콘크리트 벽돌 제조를 대상으로 순환골재 표면에 존재하는 다량의 수산화칼슘{Ca(OH) 2 }으로 고로슬래그 미분말의 잠재 수경성 반응을 유도하여 강도를 발현시키고, 또한 순환골재 미분말, 소성 순환골재 미분말, 또는 미분시멘트를 활용하여 알칼리를 보충함으로써 잠재수경성 반응을 더욱 촉진시켜 강도를 향상시키고, 공극을 충전하는 효과로 외관을 향상시키며, 탄산가스 배출감소 및 저렴한 가격으로 경제적인 자원순환형 콘크리트 벽돌제품을 제조하고자 하는 것이다.
Abstract:
본 발명은 전기로 제강공정에서 발생되는 부산물인 산화 슬래그를 잔골재로 활용하고, 콘크리트의 전체적인 강도를 향상시키면서도 콘크리트 내 시멘트의 함량을 대폭 줄임으로써 경제적이고 친환경적인 콘크리트 조성물에 관한 것으로서, 자세하게는 시멘트 8~16중량%, 물 3~6중량%, 잔골재 28~59중량%, 굵은골재 30~50중량%를 포함하며, 상기 잔골재의 30~100%가 슬래그인 것을 특징으로 하는 슬래그를 이용한 고성능 콘크리트 조성물에 대한 것이다. 상기와 같이 콘크리트 조성물을 구성하는 시멘트의 함량을 줄이고 잔골재의 대부분을 전기로 산화 슬래그로 대체함으로써 강도를 향상시키고 원가 비용을 절감할 수 있다.
Abstract:
PURPOSE: A hardener for soft ground improvement, a deep mixing process apparatus thereof, and a deep mixing method using the same provided, which can improve stirring efficiency of the slime by low speed rotation of an auger agitating blade. CONSTITUTION: A hardener for soft ground improvement comprises blast furnace slag 35-80wt.%, lime 35-50wt.%, sand or fine aggregate 10-120wt.%, and seawater 28-88wt.%. The deep mixing process apparatus comprises a blast furnace slag reservoir(100), a water tank(110), a sand or fine aggregate reservoir(120), a lime reservoir(130), a first mixer(140), a second mixer(150), a third mixing apparatus(160), a jet pump(170), an agitator, and an auger agitating blade(190). The auger agitating blade is formed of an injection path to spray hardener to the underground.