KR100693950B1 - Process for preparing concrete admixture for construction utilizing waste concrete sludge - Google Patents
Process for preparing concrete admixture for construction utilizing waste concrete sludge Download PDFInfo
- Publication number
- KR100693950B1 KR100693950B1 KR20050088223A KR20050088223A KR100693950B1 KR 100693950 B1 KR100693950 B1 KR 100693950B1 KR 20050088223 A KR20050088223 A KR 20050088223A KR 20050088223 A KR20050088223 A KR 20050088223A KR 100693950 B1 KR100693950 B1 KR 100693950B1
- Authority
- KR
- South Korea
- Prior art keywords
- sludge
- concrete
- waste concrete
- waste
- admixture
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/10—Clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/10—Cements, e.g. Portland cement
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 폐 콘크리트에서 재생골재(자갈 및 모래)를 회수 사용할 때 다량으로 발생되어 전량 매립 폐기되고 있는 슬러지의 잠재수경성을 활성화시켜 건설용의 콘크리트 혼화제 및 연약지반용 토양 고화제를 제조하는 방법에 관한 것이다. The present invention is a method for producing a concrete admixture for construction and soil hardener for soft ground by activating the potential hydraulic properties of the sludge that is generated in large quantities when the recycled aggregate (gravel and sand) from the waste concrete is used to recover It is about.
최근 환경 문제에 대한 사회적 관심이 고조되면서 환경관련 법적 규제가 강화되고 있고, 이에 따라 건설공사 현장의 폐기물 처리는 업계의 주요 관심사로 대두되고 있다. 특히 재건축, 재개발 사업의 활성화 등에 의한 시설물의 해체로 발생되는 콘크리트 폐재는 해를 거듭할수록 증가하고 있고, 이러한 폐기물은 주로 매립하여 처리되어 왔으나 그 매립지 확보 자체가 또 다른 문제로 제기되고 있고, 환경보존 및 자원의 재활용 관점에서 폐 콘크리트를 경제적으로 이용하는 방안은 매우 중요한 과제 중의 하나가 되고 있다.With the recent increase in social concerns about environmental issues, environmental regulations have been strengthened, and waste treatment at construction sites has emerged as a major concern in the industry. In particular, concrete waste generated by the dismantling of facilities due to reconstruction and revitalization of redevelopment projects has been increasing year after year, and these wastes have been mainly disposed of in landfills, but the landfill itself has been raised as another problem. And economically using waste concrete in terms of recycling resources has become one of the very important problem.
이를 위해 건설현장에서 발생하는 폐 콘크리트를 파쇄하여 시멘트 콘크리트 용 재생골재로 재활용하는 방안이 현재로서 최선의 대안으로 채택되고 있다. 그러나 파쇄방식에 의한 이러한 재생골재의 생산방식은 필연적으로 미분을 발생시키고, 깨끗한 재생골재를 얻기 위하여 이를 세척하여 제거하는데 따른 슬러지의 발생 및 처리가 새로운 환경 문제로 대두되고 있다. 현재는 수분 함유 때문에 전량 매립을 하고 있으나, 매립지 부족으로 인하여 그 처리 문제가 대두되고 있다. To this end, the method of crushing the waste concrete generated at the construction site and recycling it as recycled aggregate for cement concrete is currently adopted as the best alternative. However, the production method of such recycled aggregates by shredding method inevitably generates fine powder, and the generation and treatment of sludge caused by washing and removing them in order to obtain clean recycled aggregates is emerging as a new environmental problem. Currently, all of the landfill is buried because of the water content, but due to the shortage of landfill, the treatment problem is raised.
이러한 재생골재는 폐 콘크리트의 매립처리문제를 해결하고, 천연골재의 채취량을 줄여준다는 면에서 바람직하다고 판단된다. 하지만, 폐 콘크리트 투입량의 30% 정도가 슬러지로 배출되고, 그것도 50% 이상의 수분을 함유하는 형태로 전량 매립되기에는 여전히 큰 환경문제를 안고 있다고 생각된다. Such recycled aggregate is considered to be preferable in terms of solving the problem of landfill treatment of waste concrete and reducing the amount of collected natural aggregate. However, about 30% of the waste concrete input is discharged as sludge, and it is considered that there is still a big environmental problem to be completely buried in the form containing more than 50% water.
본 발명자들은 이러한 폐 콘크리트 슬러지는 시공에 사용된 시멘트 성분이 포함되어 있으나 수화가 모든 끝난 상태이므로 슬러지 자체의 수경성은 매우 약한 상태이다. 따라서 이러한 약한 잠재수경성을 활성화시켜 시멘트 콘크리트에의 혼화제 및 연약지반용 토양고화제로 활용하고자 하는데 그 목적을 두고 예의연구를 거듭한 결과 본 발명에 이르게 된 것이다.The inventors of the present invention, such waste concrete sludge contains the cement component used in the construction, but since the hydration is all finished, the hydraulic properties of the sludge itself is very weak. Therefore, by activating the weak latent hydraulic properties to be used as admixtures to cement concrete and soil hardeners for soft grounds, the result of repeated studies with the aim is to reach the present invention.
즉, 본 발명은 폐 콘크리트에서 재생골재(자갈 및 모래)를 회수 사용할 때 다량으로 발생되어 전량 매립 폐기되고 있는 슬러지의 잠재수경성을 활성화시켜 건설용의 콘크리트 혼화제 및 토양 고화제를 제조하는 방법을 제공하는데 그 목적이 있는 것이다. That is, the present invention provides a method for producing concrete admixtures and soil hardeners for construction by activating the latent hydraulic properties of sludge that is generated in large quantities when used to recover recycled aggregates (gravel and sand) from waste concrete. The purpose is to.
본 발명은 폐 콘크리트의 재활용 과정에서 발생하는 슬러지의 잠재수경성을 활성화시키기 위하여 폐 콘크리트 슬러지에 포틀랜드 시멘트나 고로 슬래 그 시멘트를 50 내지 80중량%를 혼합한 것을 기본 조합으로 하고, 여기에 메타카올린을 10 내지 30중량% 첨가하여서 건설용의 콘크리트 혼화제 및 연약지반용 토양고화제를 제조하는 방법임을 특징으로 한다. The present invention is based on a combination of 50 to 80% by weight of Portland cement or blast furnace slag cement in the waste concrete sludge in order to activate the potential hydraulic properties of the sludge generated during the recycling of the waste concrete, and metakaolin By adding 10 to 30% by weight is characterized in that the method for producing a concrete admixture for construction and soil hardener for soft ground.
또한, 본 발명에 의하면, 상기 메타카올린을 함유하는 폐 콘크리트 슬러지의 약한 잠재수경성을 더욱 활성화시키기 위하여 초기 강도의 증진을 위한 무수석고 및 석회를 추가로 3 내지 10중량% 함유시켜서 건설용의 콘크리트 혼화제 및 연약지반용 토양고화제를 제조하는 것을 특징으로 한다. In addition, according to the present invention, in order to further activate the weak latent hydrocurability of the waste concrete sludge containing the metakaolin to contain an additional 3 to 10% by weight of anhydrous gypsum and lime for the increase of the initial strength concrete admixture for construction And it is characterized in that for producing a soil hardener for soft ground.
이와 같은 본 발명을 다음에서 더욱 상세하게 설명하기로 한다. This invention will be described in more detail below.
본 발명에서 사용하게 되는 원료의 기본적인 화학 성분을 표 1과 같다.Table 1 shows the basic chemical components of the raw materials to be used in the present invention.
표 1Table 1
보통 포틀랜드 시멘트의 기본적인 수화반응은 시멘트가 물과 혼합되면 먼저 입자 표면이 겔화되면서 가수분해반응이 일어나고 물이 입자 내부로 계속 침투하면 서 수화가 진행되게 된다. 이에 따라 수화층 내부에 또 다른 수화물층이 형성되며, 이 수화물들이 서로 결합하면서 시멘트 입자 사이가 수화물로 채워지며 응결이 시작되고 시간이 지나면서 수화반응이 계속 진행하며 경화하게 되는 것이다. In general, the basic hydration of portland cement is that when cement is mixed with water, the surface of the particles first gels, causing hydrolysis, and water continues to penetrate into the particles. As a result, another hydrate layer is formed inside the hydration layer, and the hydrates are bonded to each other, and the cement particles are filled with hydrates, condensation starts, and the hydration reaction proceeds and hardens as time passes.
이러한 수화반응의 기본적인 반응으로 C3S(트리칼슘 실리케이트 : tricalcium silicate), C2S (디칼슘 실리케이트 : dicalcium silicate), C3A(트리칼슘 알루미네이트 : tricalcium aluminate), C4AF (테트라칼슘 알루미노 페라이트 : tetracalcium alumino ferrite) 반응 등과 기타 미량 광물로 구성되어 있는데 이러한 복합 광물들은 물의 첨가 시 다음과 같이 수화물을 생성하면서 수화 경화하게 된다.The basic reaction of this hydration reaction is C 3 S (tricalcium silicate), C 2 S (dicalcium silicate), C 3 A (tricalcium aluminate: tricalcium aluminate), C 4 AF (tetracalcium) It consists of alumino ferrite (tetracalcium alumino ferrite) reactions and other trace minerals. These complex minerals are hydrated and cured while forming hydrates when water is added.
2(3CaOSiO2) +6H2O = 3CaO2SiO2 +3Ca(OH)2 2 (3CaOSiO 2 ) + 6H 2 O = 3CaO2SiO 2 + 3Ca (OH) 2
2(2CaOSiO2) +4H2O = 3CaO2SiO2 +3Ca(OH)2 2 (2CaOSiO 2 ) + 4H 2 O = 3CaO2SiO 2 + 3Ca (OH) 2
4CaOAl2O3Fe2O3 +10H2O = 2Ca(OH)2 +6CaOAl2O3Fe2O312H2O4CaOAl 2 O 3 Fe 2 O 3 + 10H 2 O = 2Ca (OH) 2 + 6CaOAl 2 O 3 Fe 2 O 3 12H 2 O
3CaOAl2O3 +12H2O +Ca(OH)2 = 3CaOAl2O3Fe2O312H2O3CaOAl 2 O 3 + 12H 2 O + Ca (OH) 2 = 3CaOAl 2 O 3 Fe 2 O 3 12H 2 O
기타 이러한 수화반응에서 유리된 소석회(Ca(OH)2)는 실리카와 반응하여 CSH수화물이 된다. Other such hydrated lime (Ca (OH) 2 ) is reacted with silica to form CSH hydrate.
Ca++ +2(OH)- + SiO2 ⇒ CSH gelCa ++ +2 (OH) - + SiO 2 ⇒ CSH gel
이렇게 CaO를 함유하는 시멘트의 클링커 광물들이 수화과정에서 수화물을 생 성하며 경화한다. 그러나 폐 콘크리트 슬러지의 경우 CaO 성분을 40% 이상 함유하지만 자체만으로는 수화에 의한 경화가 거의 일어나지 않는다. 따라서 수화에 의한 모르타르나 콘크리트의 실용화 가능한 경화 강도를 얻으려면 50 내지 80중량% 정도의 포틀랜드시멘트 또는 고로슬래그 시멘트를 첨가하여야 한다. 그러나 하소되어 수분을 함유하지 않는 메타카올린을 첨가하면 슬러지의 약한 잠재수경성을 자극시킬 수 있으며 소석회 및 무수석고 등을 추가로 첨가하여 초기수화와 경화를 더욱더 증진시킬 수 있다.The clinker minerals in cement containing CaO hydrate and hydrate during hydration. However, waste concrete sludge contains more than 40% of CaO, but hardly hardens by hydration by itself. Therefore, in order to obtain the practical hardening strength of mortar or concrete by hydration, it is necessary to add about 50 to 80% by weight of Portland cement or blast furnace slag cement. However, the addition of calcined, water-free metakaolin can stimulate the sludge's weak hydrophobicity and further enhance the initial hydration and hardening by adding additional slaked lime and anhydrous gypsum.
실리카를 다량으로 함유하는 포졸란 물질은 자체로는 수화 경화하는 성질이 없으나 유리되어 불안정해진 수산화 칼슘과 용이하게 반응 결합하여 불용성이고, 경화성을 갖는 화합물을 생성할 수 있어 콘크리트의 안정화를 위한 시멘트 혼합재로 많이 사용되고 있다. 이 중 메타카올린은 점토를 800℃ 이상의 열처리를 통하여 활성화 시킨 후 일정한 입도로 미분화 한 것으로 SiO2와 Al2O3가 주성분인 물질이다. 메타카올린은 실리카흄을 대체 할 수 있는 포졸란 물질로써 콘크리트화 조건에서의 수화반응, 수산화칼슘과 상온에서 서서히 결합하는 포졸란 반응이 좋아 고강도 콘크리트 혼화재로 많이 사용되어지고 있다.Pozzolanic material containing a large amount of silica has no property of hydration hardening by itself, but is easily reacted and combined with freed calcium hydroxide, which is insoluble, and can produce a compound having hardenability. As a cement mixture for stabilizing concrete It is used a lot. Among these, metakaolin is clay which is activated through the heat treatment of 800 ℃ or higher and then micronized to a certain particle size, and is mainly composed of SiO 2 and Al 2 O 3 . Metakaolin is a pozzolanic material that can replace silica fume. It is widely used as a high-strength concrete admixture due to its good hydration reaction under concrete conditions and pozzolanic reaction which slowly combines with calcium hydroxide at room temperature.
본 발명에서 사용하는 폐 콘크리트 슬러지는 실리카를 주성분으로 하는 골재 미세분말과 수화된 포틀랜드시멘트 모르타르의 혼합물로서 폐 콘크리트 폐기물 처리시 약 5% 정도 발생하고 있다. 초기에는 폐 콘크리트 폐기물의 증가로 인해 환경오염이 심각해져 이를 재생골재로 재활용하는 기술이 제안되었다. 이로 인해 현재 폐 콘크리트 폐기물의 처리가 대부분 재생골재(자갈 및 모래)로 제조되고 있는데 제조과정에서 필연적으로 미립자(먼지)가 발생할 뿐 아니라 재생골재의 미분 방지 및 처리과정의 오염수 발생은 침전조에서 많은 슬러지를 발생하게 하였다, 이러한 다량의 수분을 함유한 슬러지는 매립을 하지 못해 적치하거나 폐 콘크리트 처리시 발생하는 흙과 함께 섞어 매립하고 있는 실정이다. 하지만, 폐슬러지 자체가 폐 콘크리트의 부산물로써 CaO가 다량 함유되어 있어 어느 정도의 결합력이 있으므로 본 발명에서와 같이 메타카올린으로 활성화시켜 연약지반용 토양고화제로 활용하거나, 콘크리트에 첨가하는 포틀랜드시멘트 또는 고로슬래그시멘트에의 혼화제로 활용할 수 있다.The waste concrete sludge used in the present invention is a mixture of aggregate fine powder mainly composed of silica and hydrated Portland cement mortar, and is generated about 5% when treating waste concrete waste. In the early days, environmental pollution became serious due to the increase of waste concrete waste, and a technology for recycling it to recycled aggregate was proposed. As a result, most of the waste concrete wastes are produced from recycled aggregates (gravel and sand). In addition, particulates (dust) are inevitably generated during the manufacturing process. The sludge that contains a large amount of water is unable to landfill, and the landfill is mixed with the soil generated during disposal or waste concrete treatment. However, since the waste sludge itself contains a large amount of CaO as a by-product of the waste concrete, there is a certain amount of bonding power, so it is activated as metakaolin as in the present invention and used as a soil hardener for soft soil, or Portland cement added to concrete or It can be used as admixture to blast furnace slag cement.
본 발명에서 이들의 배합비율은 폐 콘크리트 슬러지에 강도 및 응결성을 부여하기 위하여 50 내지 80중량% 범위에서 포틀랜드 시멘트 또는 고로슬래그 시멘트를 배합하는 것을 기본 조합으로 한다. 이 때 슬러지는 1mm체로 불순물을 제거하고 사용하며 주 자극 및 수화 및 경화증진을 위해 메타카올린을 첨가한다. 메타카올린은 폐콘크리트 슬러지와 포틀랜드 시멘트 또는 고로슬래그 시멘트의 배합비에 대해 10 내지 30중량% 첨가하는 것이 바람직하며, 강도 증진을 위하여 무수석고 및 소석회의 첨가량은 3 내지 10중량%로 조절하는 것이 바람직하다. In the present invention, the mixing ratio thereof is based on the combination of portland cement or blast furnace slag cement in the range of 50 to 80% by weight in order to give strength and condensation to the waste concrete sludge. At this time, sludge is used with 1mm sieve to remove impurities and metakaolin is added for main stimulation, hydration and hardening. Metakaolin is preferably added in an amount of 10 to 30% by weight based on the mixing ratio of waste concrete sludge and Portland cement or blast furnace slag cement, and the amount of anhydrous gypsum and slaked lime is preferably adjusted to 3 to 10% by weight in order to enhance the strength. .
이와 같은 본 발명을 실시예 및 비교예에 의거하여 더욱 상세하게 설명하기로 한다. This invention will be described in more detail based on Examples and Comparative Examples.
실시예Example 1 One
수분함량 35%의 폐콘크리트 슬러지에 포틀랜드시멘트를 50중량% 혼합한 슬러지 시멘트(5:5)에 20중량%의 메타카올린을 첨가하여 연약지반용 토양고화제 및 콘크리트용 혼화제를 제조하였다. 20 wt% of metakaolin was added to the sludge cement (5: 5) in which 50 wt% of the Portland cement was mixed with 35% of the water content of waste concrete sludge, thereby preparing a soft soil soil hardener and a concrete admixture.
이렇게 제조한 토양고화제 및 혼화제에 대한 압축강도를 측정한 결과 3일 96.2, 7일 160.7, 28일 211.5 Kg/cm2 로 나타나 메타카올린의 첨가가 슬러지의 활성화에 기여함을 알 수 있었다. 특히 큰 폭의 초기 강도 증진이 이루어졌으며 밀도가 2.0, 흡수율이 17% 정도로 물성이 향상되었음을 알 수 있었다.As a result of measuring the compressive strength of the prepared soil hardener and admixture, it was found that 3 days 96.2, 7 days 160.7, 28 days 211.5 Kg / cm 2 , the addition of metakaolin contributed to the activation of sludge. In particular, a large initial strength enhancement was achieved, and the physical properties were improved to about 2.0% in density and 17% in water absorption.
실시예Example 2 2
수분함량 35%의 폐콘크리트 슬러지에 포틀랜드 시멘트를 50중량% 혼합한 슬러지 시멘트(5:5)에 10중량%의 메타카올린과 10중량%의 무수석고를 첨가하여 연약지반용 토양고화제 및 콘크리트용 혼화제를 제조하였다.10% by weight of metakaolin and 10% by weight of anhydrous gypsum were added to the sludge cement (5: 5) mixed with 50% by weight of Portland cement in 35% water-containing waste concrete sludge. Admixtures were prepared.
이렇게 제조한 토양고화제 및 혼화제에 대한 압축강도를 측정한 결과 3일 100.3, 7일 155.2, 28일 202.3 Kg/cm2, 밀도가 1.9이었으며 흡수율은 17.5%로 메타카올린만을 첨가하는 경우보다는 약간 물성이 저하되었으나 도로 노반 등 저급 콘크리트 등에는 충분히 활용이 가능할 정도의 모르타르 강도를 얻을 수 있었다.As a result of measuring the compressive strength of the prepared soil hardener and admixture, the density was 100.3, 7 days 155.2, 28 days 202.3 Kg / cm 2 , the density was 1.9 and the water absorption was 17.5%. However, the mortar strength was sufficiently obtained for low-grade concrete such as roadbeds.
비교예Comparative example 1 One
수분함량 35%의 폐콘크리트 슬러지에 고로슬래그 시멘트를 30중량% 혼합한 슬러지 시멘트(7:3) 비율에 메타카올린 20%를 첨가하고 추가로 무수석고와 소석회를 각각 5중량%씩 첨가하여 연약지반용 토양고화제 및 콘크리트용 혼화제를 제조하였다.20% of metakaolin is added to the ratio of sludge cement (7: 3) mixed with 30% by weight of blast furnace slag cement to 35% water content of waste concrete sludge, and 5% by weight of anhydrous gypsum and slaked lime are added to the soft ground. Soil hardener for concrete and admixture for concrete were prepared.
이렇게 제조한 토양고화제 및 혼화제에 대해 밀도를 측정한 결과 1.87, 흡수율 18%, 압축강도가 3일 66.5, 7일 92,4, 28일 124.5 Kg/cm2 로 나타나 폐콘크리트의 첨가량이 70% 이하가 되어야 도로 노반 등 저급 콘크리트 등에의 활용이 가능할 것으로 나타났다.As a result of measuring the density of the soil hardeners and admixtures prepared in this way, 1.87, 18% water absorption, 124.5 Kg / cm 2 of 3 days 66.5, 7 days 92,4, 28 days showed 70% of the added amount of waste concrete. It was found that it can be used for low-grade concrete such as roadbeds only when it is below.
비교예Comparative example 2 2
수분함량 35%의 폐콘크리트 슬러지만을 사용하여 만든 모르타르 시편의 3일, 7일, 28일 압축강도는 13.7, 26.1, 31.5 Kg/cm2 에 불과하였다. 따라서 슬러지만으로는 시멘트와 같은 수경성 결합제로의 활용이 어려움을 알 수 있었다.The 3, 7 and 28-day compressive strengths of the mortar specimens using only 35% water-containing waste concrete sludge were only 13.7, 26.1 and 31.5 Kg / cm 2 . Therefore, it was found that it is difficult to use sludge alone as a hydraulic binder such as cement.
비교예Comparative example 3 3
수분함량 35%의 폐콘크리트 슬러지에 포틀랜드시멘트를 85중량% 혼합한 슬러지 시멘트의 압축강도는 3일 107.3 , 7일 169.1 28일 213.5 Kg/cm2 이었으며 밀도는 2.1이며 흡수율은 18%였다. The compressive strength of sludge cement with 85% by weight of Portland cement mixed with 35% moisture content of waste concrete sludge is 107.3 for 3 days, 169.1 for 28 days, 213.5 Kg / cm 2 It had a density of 2.1 and an absorption rate of 18%.
따라서 폐 콘크리트 슬러지의 첨가량이 15% 정도가 실제 콘크리트에 사용할 수 있는 가장 적정 수준의 배합비 인 것을 알 수가 있었다.Therefore, it was found that about 15% of the added amount of waste concrete sludge was the most appropriate level of mixing ratio that can be used for concrete.
본 발명의 건설용의 콘크리트 혼화제 및 연약지반용 토양고화제에서 폐 콘크리트 슬러지는 시멘트 성분을 함유하지만 1차 경화되었던 모르타르이기 때문에 결합력이 약하므로 경화제로써의 결합력을 부여하기 위하여 메타카올린과 포틀랜드 시멘트 또는 고로슬래그 시멘트와 혼합함으로써 경화 특성을 발휘하게 되는 효과가 있고, 무수석고 및 생석회의 추가 첨가에 의해 기타 수경성 자극제 및 초기 강도를 증진시킬 수 있어 건설용의 콘크리트 혼화제 및 연약지반용 토양고화제로 유용한 효과가 있다.In the concrete admixture for construction of the present invention and the soil hardener for soft ground, the waste concrete sludge contains cement, but since the primary hardened mortar, the binding strength is weak, so that the metakaolin and portland cement or Mixing with blast furnace slag cement has the effect of exhibiting hardening properties, and by adding anhydrous gypsum and quicklime, it is possible to enhance other hydraulic stimulants and initial strength, which is useful as concrete admixture for construction and soil hardener for soft ground. It works.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20050088223A KR100693950B1 (en) | 2005-09-22 | 2005-09-22 | Process for preparing concrete admixture for construction utilizing waste concrete sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20050088223A KR100693950B1 (en) | 2005-09-22 | 2005-09-22 | Process for preparing concrete admixture for construction utilizing waste concrete sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR100693950B1 true KR100693950B1 (en) | 2007-03-12 |
Family
ID=38103381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR20050088223A KR100693950B1 (en) | 2005-09-22 | 2005-09-22 | Process for preparing concrete admixture for construction utilizing waste concrete sludge |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100693950B1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100914258B1 (en) * | 2008-02-28 | 2009-08-27 | 경상대학교산학협력단 | Concrete carrier consisted of waste sludge as a inorganic binder using meta-kaolin and manufacturing method of the same |
| KR100929309B1 (en) | 2009-07-14 | 2009-11-27 | 경상대학교산학협력단 | Manufacturing Method for Concrete Body consisted of Waste Sludge as a Inorganic Binder using Meta-Kaolin |
| CN103803830A (en) * | 2014-01-21 | 2014-05-21 | 北京奥润开元环保科技研究院有限公司 | Activation treatment method of renewable powder |
| CN104788063A (en) * | 2015-04-29 | 2015-07-22 | 河海大学 | Unfired and pressing-free sludge brick and preparation method thereof |
| KR20170031293A (en) | 2015-09-10 | 2017-03-21 | 영남대학교 산학협력단 | Eco-friendly Mortar Composition Having Non-Sintered Cement and Preparing Method Thereof |
| KR20180003116A (en) | 2016-06-30 | 2018-01-09 | 한국레미콘공업협동조합연합회 | Manufacture of Concrete using Activated-Sludge and the concrete and the Activated-Sludge for concrete |
| KR101937772B1 (en) * | 2017-09-07 | 2019-01-11 | 주식회사 포스코건설 | Eco-friendly composition for high performance concrete using alkali activator |
| JP2019056078A (en) * | 2017-09-22 | 2019-04-11 | 日本コンクリート工業株式会社 | Insolubilization material for soil and method for producing the same |
| KR20190046456A (en) * | 2017-10-26 | 2019-05-07 | 주식회사 포스코건설 | Method for constructing mass concrete of architecture having improved chracteristics using two types of concrete composition mixture |
| CN111153617A (en) * | 2020-01-07 | 2020-05-15 | 四川联绿强环保科技有限公司 | Regenerated composite admixture utilizing construction waste and preparation method thereof |
| CN116854450A (en) * | 2023-03-15 | 2023-10-10 | 四川省建材工业科学研究院有限公司 | Activating treatment agent for preparing sintered insulating bricks from water-based drilling cuttings |
-
2005
- 2005-09-22 KR KR20050088223A patent/KR100693950B1/en active IP Right Grant
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100914258B1 (en) * | 2008-02-28 | 2009-08-27 | 경상대학교산학협력단 | Concrete carrier consisted of waste sludge as a inorganic binder using meta-kaolin and manufacturing method of the same |
| KR100929309B1 (en) | 2009-07-14 | 2009-11-27 | 경상대학교산학협력단 | Manufacturing Method for Concrete Body consisted of Waste Sludge as a Inorganic Binder using Meta-Kaolin |
| CN103803830A (en) * | 2014-01-21 | 2014-05-21 | 北京奥润开元环保科技研究院有限公司 | Activation treatment method of renewable powder |
| CN104788063A (en) * | 2015-04-29 | 2015-07-22 | 河海大学 | Unfired and pressing-free sludge brick and preparation method thereof |
| KR20170031293A (en) | 2015-09-10 | 2017-03-21 | 영남대학교 산학협력단 | Eco-friendly Mortar Composition Having Non-Sintered Cement and Preparing Method Thereof |
| KR20180003116A (en) | 2016-06-30 | 2018-01-09 | 한국레미콘공업협동조합연합회 | Manufacture of Concrete using Activated-Sludge and the concrete and the Activated-Sludge for concrete |
| KR101937772B1 (en) * | 2017-09-07 | 2019-01-11 | 주식회사 포스코건설 | Eco-friendly composition for high performance concrete using alkali activator |
| JP2019056078A (en) * | 2017-09-22 | 2019-04-11 | 日本コンクリート工業株式会社 | Insolubilization material for soil and method for producing the same |
| KR20190046456A (en) * | 2017-10-26 | 2019-05-07 | 주식회사 포스코건설 | Method for constructing mass concrete of architecture having improved chracteristics using two types of concrete composition mixture |
| KR102074743B1 (en) * | 2017-10-26 | 2020-02-07 | 주식회사 포스코건설 | Method for constructing mass concrete of architecture having improved chracteristics using two types of concrete composition mixture |
| CN111153617A (en) * | 2020-01-07 | 2020-05-15 | 四川联绿强环保科技有限公司 | Regenerated composite admixture utilizing construction waste and preparation method thereof |
| CN116854450A (en) * | 2023-03-15 | 2023-10-10 | 四川省建材工业科学研究院有限公司 | Activating treatment agent for preparing sintered insulating bricks from water-based drilling cuttings |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100693950B1 (en) | Process for preparing concrete admixture for construction utilizing waste concrete sludge | |
| KR101289825B1 (en) | Sludge solidified agent and menufacturing method of artificial soil usign the same | |
| KR101459990B1 (en) | block composition using the sludge Ash and manufacturing method block | |
| KR101244825B1 (en) | High volume blast furnace slag concrete composition using waste ash and recycled aggregate | |
| Bai et al. | Low carbon binder preparation from slag-red mud activated by MSWI fly ash-carbide slag: Hydration characteristics and heavy metals' solidification behavior | |
| KR102310854B1 (en) | Concrete manufactured with a salt-resistance enhancing composition capable of self-repairing concrete cracks, and a method for manufacturing concrete structures with improved salt-resistance | |
| KR20180109377A (en) | Surface solidification and soil pavement method | |
| CN111574178B (en) | Preparation method of baking-free brick from residual soil and residual mud | |
| KR101242568B1 (en) | Block composer using bottom ash and phospho-gypsum | |
| KR101416005B1 (en) | Nature-friendly block using non-sintering inorgarnic binder and manufacturing method thereof | |
| KR101272761B1 (en) | Activator for latent hydraulic property of blast furnace slag powder by waste ash and recycled aggregate, and non-cement mortar composition using the same | |
| CN112960922A (en) | Desulfurized fly ash based cementing material and preparation and application thereof | |
| Ahmad et al. | Experimental study of cold–Bonded artificial lightweight aggregate concrete | |
| KR100929309B1 (en) | Manufacturing Method for Concrete Body consisted of Waste Sludge as a Inorganic Binder using Meta-Kaolin | |
| CN115557755B (en) | Low-calcium carbon-fixing regenerated permeable concrete and production method thereof | |
| KR101120409B1 (en) | Environment-friendly eco-block | |
| CN114057419B (en) | Slag reinforcement modification method for circulating fluidized bed and application thereof | |
| KR101612742B1 (en) | Quick-setting composition for paving soil and method for paving soil road by using the same | |
| KR100375407B1 (en) | method of manufacturing solity for preventing heavy metals from being occurred in wastes and solity manufactured by the same | |
| KR101852483B1 (en) | Makinh method of Solidified agent using high-calcium fly ash | |
| KR100580583B1 (en) | Concrete products with high-strength using reclaimed coal ash and waste stone powder as fine aggregates and its manufacturing method | |
| KR102522763B1 (en) | Binder for secondary concrete product and manufacturing method of secondary concrete product | |
| KR101619778B1 (en) | Reclamation method | |
| KR101133440B1 (en) | Environment-friendly yellow soil concert | |
| CN112624710A (en) | High-strength recycled concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20130329 Year of fee payment: 7 |
|
| FPAY | Annual fee payment |
Payment date: 20131231 Year of fee payment: 8 |
|
| FPAY | Annual fee payment |
Payment date: 20141230 Year of fee payment: 9 |
|
| FPAY | Annual fee payment |
Payment date: 20170406 Year of fee payment: 11 |
|
| FPAY | Annual fee payment |
Payment date: 20180110 Year of fee payment: 12 |
|
| FPAY | Annual fee payment |
Payment date: 20190110 Year of fee payment: 13 |