摘要:
본발명은, 옐리마이트, 알루미네이트및 페라이트의합에대한칼슘설페이트의중량비율(R)이 0.5 내지 0.85의범위인칼슘설포알루미네이트시멘트및 보조시멘트질물질을함유하는복합결합제; a) 하나이상의칼슘설포알루미네이트시멘트를제공하는단계, b) 하나이상의보조시멘트질물질을제공하는단계, 및 c) 10 내지 90 중량%의칼슘설포알루미네이트시멘트(들)를 10 내지 90 중량%의보조시멘트질물질(들)과혼합하는단계를포함하는복합결합제를제조하는방법; 및수경성건축재료및 특수건설용화학적조성물을제조하기위한이의용도에관한것이다.
摘要:
본 발명은 콘크리트 포장 도로를 보수하기 위한 조성물에 관한 것으로서, 상기 과제를 달성하기 위한 해결 수단으로서, 초속경시멘트 15 ∼ 21 중량%; 팽창재 0.3 ∼ 0.8 중량%(바람직하게는 칼슘설포알루미네이트); 유동화재 0.1 ∼ 0.3중량%; AE제 0.1 ∼ 0.4중량%; 잔골재 29 ∼ 36 중량%; 및 굵은 골재 42 ∼ 54중량%;를 포함한다. 이와 같은 본 발명에 따른 조성물을 이용하여 도로를 보수하는 경우, 경화시간을 획기적으로 단축하여 작업성을 크게 향상시키면서도 구조특성(압축강도, 휨강도, 부착강도)과 내구특성(염분침투저항성, 동결융해저항성, 스케일링저항성, 마모저항성) 및 적합특성(건조수축, 열팽창계수, 탄성계수)이 개선되며, 또한 경화 후 수축에 따른 미세균열 발생을 현저하게 낮출 수 있어 파손 및 재보수율이 크게 낮아지는 이점이 있다.
摘要:
목질계 바이오매스(lignocellulosic biomass)를 산으로 가수분해하여 얻어지는 리그닌을 준비하는 단계; 및 상기 리그닌을 130℃ 이상의 온도에서 술폰화시키는 단계;를 포함하며, 상기 술폰화 단계에서 리그닌 200g 당 0.6몰 내지 2.0몰의 설파이트 또는 바이설파이트 화합물이 첨가되며, 상기 술폰화 단계가 pH 13 미만에서 수행되는 리그노술포네이트 제조방법, 상기 방법으로 제조된 리그노술포네이트, 이를 포함하는 혼화제 및 콘크리트가 제공된다.
摘要:
The present invention relates to an admixture capable of reducing viscosity of high viscosity concrete according to the increase of fly ash content up to 50% when manufacturing concrete. The present invention provides an admixture for high viscosity concrete wherein 20-40% of a polycarboxylic acid-based water reducing agent, 10-30% of a polycarboxylic acid-based maintaining agent, 0.5-2% of an antifoaming agent, 1-3% of a high dispersion agent and 10-25% of an air entraining agent are included in water, and thereby, overcoming the decrease of workability and production efficiency caused by the viscosity increase of concrete, as well as securing capabilities for stably generating and maintaining foams within ranges in which physical properties of concrete are not affected. Therefore, durability of concrete can be enhanced even when 50% or more fly ash is used. Accordingly, the admixture for high viscosity concrete of the present invention can increase the amount of fly ash used up to 50% on the basis of the weight of cement when manufacturing concrete, and therefore, can recycle resources and secure compressing strength and economic feasibility. [Reference numerals] (AA) Viscosity (cps); (BB) High dispersion agent non-insertion; (CC) High dispersion agent 1%; (DD) High dispersion agent 2%; (EE) High dispersion agent 3%; (FF) High dispersion agent 4%; (GG) High dispersion agent 5%
摘要:
PURPOSE: A polymer cement mortar composition in a rapid curing type with self leveling property is provided to facilitate construction as liquidity is excellent by having optimal ratio of a rapid curing type inorganic binder and a polymer compound and to harden in a short period of time. CONSTITUTION: A polymer cement mortar composition in a rapid curing type with self leveling property comprises 20-60 weight% of a rapid curing type inorganic binder; 20-60 weight% of fine aggregate; and 1-30 weight% of a polymer compound. The polymer compound contains 75-99 weight% of acryl emulsion; 0.1-10 weight% of polyethylene glycol and mono-methacrylate; 0.1-10 weight% of polyethylene acrylate; 0.1-10 weight% of polystyrene acrylic ester latex; and 0.01-5 weight% of polyvinyl acetate. The rapid curing type inorganic binder contains 20-90 weight% of Portland cement; 5-50 weight% of calcium sulfo aluminate; 0.1-20 weight% of alumina cement; 0.1-20 weight% of blast-furnace slag; 0.1-20 weight% of metakaolin; and 0.1-10 weight% of plaster. The rapid curing type inorganic binder further includes 0.01-5 weight% of aluminum powder to curb contraction by cement.
摘要:
PURPOSE: A self-leveling flooring material composition is provided to improve bonding strength, mobility, shrinkage change prevention property, and freezing and thawing resistance by including a strength-enhancing polymer, a superplasticizer, a wollastonite based mineral, and a micro air bubble-entraining agent. CONSTITUTION: A self-leveling flooring material composition contains 10-50wt% of cement, 5-70wt% of bottom ash, 10-50wt% of fine aggregate, 5-30wt% of limestone, 1-10wt% of strength-enhancing polymer, 0.01-2wt% of superplasticizer, 0.01-2wt% of retarder, 0.1-5wt% of needle bed siliceous wollastonite based mineral, and 0.0001-0.1wt% of micro air bubble-entraining agent. The strength-enhancing polymer is either a powder or liquid form. The strength-enhancing polymer is selected from the group consisting of vinylacetate ethylene, vinylacetate ethylene vinylester, vinylacetate methylmethacrylate ethylene, vinylchloride vinylester ethylene, vinylchloride ethylene vinyl laurate, acryl, and styrene acryl.