KR20180011390A - Cement for pavement and repairment - Google Patents
Cement for pavement and repairment Download PDFInfo
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- KR20180011390A KR20180011390A KR1020160092648A KR20160092648A KR20180011390A KR 20180011390 A KR20180011390 A KR 20180011390A KR 1020160092648 A KR1020160092648 A KR 1020160092648A KR 20160092648 A KR20160092648 A KR 20160092648A KR 20180011390 A KR20180011390 A KR 20180011390A
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- 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
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
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- 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
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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- 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
- C04B28/10—Lime cements or magnesium oxide cements
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- 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
- C04B28/14—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 calcium sulfate cements
- C04B28/16—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 calcium sulfate cements containing anhydrite, e.g. Keene's cement
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- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
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- 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
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- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
본 발명은 토목 재료분야에 관한 것으로서, 상세하게는 도로 포장 또는 보수에 사용되는 시멘트 혼합물에 관한 것이다BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a civil engineering material field, and more particularly to a cement mixture used for pavement or repair
국내 도로에는 동절기에 제설작업을 위하여 염화칼슘 및 소금이 과량 살포되고 있으므로, 도로포장을 이루는 콘크리트는 살포된 염화물 및 Ca+이온의 침투에 의한 피해에 무방비로 노출되어 있다.Since the domestic roads are overpresed with calcium chloride and salt for snow removal in the winter season, the concrete that forms the road pavement is vulnerable to damages caused by the penetration of chloride and Ca + ions.
이와 같이 염화물 및 Ca+ 이온의 침투를 받은 도로 콘크리트는 염해(염화물에 의한 철근 부식)로 인한 균열이 발생할 수 있고, 과량의 Ca+이온은 콘크리트에 침투하여 알칼리-골재반응에 의한 팽창으로 인하여 콘크리트의 성능저하와 파괴를 야기한다.In this way, the road concrete that has been infiltrated with chlorides and Ca + ions can crack due to salt corrosion (chloride corrosion) and excessive Ca + ions penetrate into the concrete and the performance of the concrete due to the expansion due to the alkali- Causing degradation and destruction.
이러한 이유로 인하여 제설재를 비 염화물계로 변경하기 위한 방안이 연구되고 있으나 경제성의 문제로 인하여 뚜렷한 대안이 제시되지 못하고 있는 바, 콘크리트 자체의 염화물에 대한 저항성을 높이는 재료의 개발이 시급한 실정이다.For this reason, a method for changing the barrier material to a non-chloride material has been studied, but due to the economical problem, no clear alternative has been proposed, and it is urgent to develop a material that increases the resistance of the concrete itself to chloride.
또한 도로의 신규 포장 및 보수 포장을 위하여 조강 및 초조강 성질이 효율적으로 발휘되는 시멘트가 요청된다. Also, for the new packing and repairing of roads, cement is required which effectively demonstrates the properties of crude steel and toughness.
본 발명은 상기와 같은 문제점을 해결하기 위하여 도출된 것으로서, 콘크리트의 내부 공극구조를 개선시켜 제설재 살포시 도로 포장 콘크리트에 대한 염화물의 침투를 방지하고, 콘크리트의 수축을 방지하며, 조강 및 초조강 성질을 발현하는 시멘트 혼합물을 제시함을 그 목적으로 한다.The present invention has been made in order to solve the above problems, and it is an object of the present invention to improve the internal void structure of concrete to prevent penetration of chloride into road pavement concrete, prevent shrinkage of concrete, The present invention is directed to a cement admixture which expresses a cement admixture.
상기 과제의 해결을 위하여, 본 발명은 시멘트, 고로슬래그 미분말, 플라이 애쉬, 공업용 소석회, 무수석고, 응결지연제를 포함하며, 특히 기능성 수축방지제를 포함하는 것을 특징으로 하는 조강 및 초조강 시멘트 혼합물을 제시한다.In order to solve the above problems, the present invention provides a method for producing a cement admixture, which comprises a cement, a blast furnace slag fine powder, a fly ash, an industrial slag, an anhydrous gypsum and a coagulation retardant, present.
본 발명에 따른 시멘트 혼합물은 콘크리트의 내부 공극구조를 개선시켜 제설재 살포시 도로 포장 콘크리트에 대한 염화물의 침투를 방지하고, 특히 기능성 수축저감제를 이용하여 조강 및 초조강 성질을 발현할 수 있다. The cement admixture according to the present invention improves the internal void structure of the concrete to prevent penetration of chloride into road pavement concrete when spraying the building material, and in particular, can express crude and tumbling properties using a functional shrinkage reducing agent.
이하, 본 발명의 실시예에 관하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail.
본 발명에 의한 도로 포장 및 보수용 내염성 시멘트 혼합물은 기본적으로, 시멘트 30~50 중량%; 고로슬래그 미분말 20~40 중량%; 플라이 애쉬 10~30 중량%; 공업용 소석회 0.5~5 중량%; 무수석고 3~10 중량%; 응결지연제 0.05~1.0중량%를 포함하여 구성된다.The salt-resistant cement admixture for pavement and repair according to the present invention is basically composed of 30 to 50% by weight of cement; 20 to 40% by weight of fine blast furnace slag powder; 10 to 30% by weight of fly ash; 0.5 to 5% by weight of industrial slaked lime; 3 to 10% by weight of anhydrous gypsum; And 0.05 to 1.0% by weight of a coagulation retarder.
여기서 시멘트는 보통 포틀랜드시멘트, 조강시멘트, 저열시멘트 또는 저열시멘트 중 하나 또는 2 이상의 혼합에 의해 이루어진 것을 사용할 수 있다.Here, the cement can be usually made by mixing one or more of Portland cement, crude steel cement, low heat cement or low heat cement.
고로 슬래그 미분말은 수화과정에서 Ca2+, Mg2+, AlO44-, SiO44- 이온들을 발생시키는데, 이들은 시멘트 수화물과 반응하여 칼슘실리케이트 (CSH), 칼슘알루미네이트 (CAH10) 수화물을 생성함으로써 시멘트의 알칼리량을 감소시키고, 경화 후 콘크리트 내부를 치밀하게 하여 제설재로 부터 Cl- 이온을 흡착하고 Ca2+ 이온의 유입을 차단한다.The blast furnace slag powder generates Ca2 +, Mg2 +, AlO44-, and SiO44- ions during hydration process, which react with cement hydrate to produce calcium silicate (CSH) and calcium aluminate (CAH10) hydrate, After the hardening, the inside of the concrete is dense to adsorb Cl - ions from the barrier agent and block the inflow of Ca2 + ions.
플라이 애쉬의 SiO2, Al2O3의 성분은 시멘트 수화물과의 포졸란 반응을 통해 시멘트의 알칼리 성분을 흡수하고 경화체의 내부 조직을 치밀하게 하며, 알루미늄성분은 제설재로 부터의 Cl- 이온을 흡착하고 Ca2+ 이온의 유입을 차단한다.The components of SiO2 and Al2O3 of the fly ash absorb the alkali component of the cement through the pozzolanic reaction with the cement hydrate and make the internal structure of the cured product dense. The aluminum component adsorbs the Cl- ion from the carrier, Thereby blocking the inflow.
공업용 소석회는 생석회(CaO)가 물과 반응후 분급하여 얻어진 백색 분말로 CaO 함량이 70~80중량%이고, 입도는 200mesh 통과분이 98중량% 이상인 것을 사용하는 것이 바람직하다.The industrial slaked lime is a white powder obtained by reacting calcium oxide (CaO) with water and classified, and it is preferable to use CaO having a CaO content of 70 to 80% by weight and a particle size of not less than 98% by weight.
이는 생석회와 물의 반응에 의해 제조되는 것으로서, 대부분은 Ca(OH)2로 변화하나 일부는 CaO 형태로 잔존한다.It is produced by the reaction of quicklime and water. Most of it is changed to Ca (OH) 2, but some of it remains in CaO form.
일반적으로 고로 슬래그 미분말과 플라이 애쉬를 사용하는 경우, 시멘트 콘크리트의 화학저항성과 내구성능 및 장기강도를 증진시키는 장점이 있으나, 초기수화반응의 지연으로 콘크리트 응결이 지연되고 초기 수화발열량이 매우 적어 1일 및 3일 재령의 강도 발현성이 일반 콘크리트와 비교하여 적은 바 특히 동절기 시공시 콘크리트가 동해(凍害)를 입기 쉬운 원인이 될 수 있다.In general, when blast furnace slag powder and fly ash are used, the chemical resistance, durability and long-term strength of cement concrete are improved. However, because of delay of initial hydration reaction, concrete condensation is delayed, And 3 days of age are less than those of ordinary concrete. Especially during the winter season, concrete may cause frost damage.
그런데, 공업용 소석회를 혼합하는 경우, 이에 포함된 Ca(OH)2가 고로 슬래그 미분말과 플라이 애쉬의 수화를 촉진시켜 콘크리트의 초기 강도를 증진시키고 내화학성 및 내구성을 증진시킴으로써 상술한 문제를 해소하도록 한다.However, when the industrial slag is mixed, Ca (OH) 2 contained therein promotes the hydration of the blast furnace slag fine powder and the fly ash, thereby improving the initial strength of the concrete and improving the chemical resistance and durability, thereby solving the above-mentioned problem .
즉, 공업용 소석회는 수산화칼슘량을 증대시켜 상술한 고로 슬래그 미분말과 플라이 애쉬의 반응을 촉진시킴으로써 포장체의 내구성을 증대시키는 역할을 담당하는 것이다.That is, the industrial slag plays a role of increasing the durability of the pavement by promoting the reaction between the blast furnace slag fine powder and the fly ash by increasing the amount of calcium hydroxide.
또한, 공업용 소석회 중의 CaO는 물과 반응하면서 발열하므로 시멘트 콘크리트의 수화발열을 증가시키고 콘크리트의 초기 강도 증진에 기여한다.In addition, CaO in industrial lime lime increases the hydration heat of cement concrete and contributes to increase the initial strength of concrete because it generates heat while reacting with water.
무수석고는 물과 혼합 시 SO3 용출량을 증대시켜 고로슬래그 미분말의 반응을 촉진시키고, 시멘트 수화물 중 칼슘알루미네이트와 반응하여 에트린자이트를 생성함으로써 내부 조직을 치밀화시키며, MgO 성분이 장기적으로 콘크리트의 건조수축을 상쇄시켜 수축에 의한 균열을 방지하고 내구성을 증대시킨다.Anhydrous gypsum increases the amount of SO3 elution when mixed with water to accelerate the reaction of blast furnace slag powder and reacts with calcium aluminate in cement hydrate to produce etrinite and densify the internal structure. It compensates for drying shrinkage, preventing cracking due to shrinkage and enhancing durability.
이러한 반응이 원활히 일어나도록 하기 위해서는 분말도 3,000cm2/g이상의 무수석고를 사용하는 것이 바람직하다.In order to cause such a reaction to occur smoothly, it is preferable to use an anhydrous gypsum powder of 3,000 cm 2 / g or more.
한편, 초기 압축강도 증진 및 수화발열량의 증가를 위해 사용되는 공업용 소석회에 포함된 CaO 성분에 의한 굳지 않은 콘크리트의 슬럼프 로스(Slump-loss)를 방지하여 운반, 대기 및 타설 작업에 필요한 작업시간 확보하기 위해서는, 응결지연제를 혼합조성물 100중량% 대비 0.1~1.0중량% 정도 사용하는 것이 바람직하다.On the other hand, to prevent the slump-loss of unhardened concrete due to the CaO component contained in the industrial slag used for increasing the initial compressive strength and increasing the hydration heat, it is necessary to secure the working time required for transportation, It is preferable to use the coagulation retarding agent in an amount of 0.1 to 1.0% by weight based on 100% by weight of the mixed composition.
이러한 응결지연제는 주석산(Tartaric acid), 구연산(Citric acid), 글루콘산나트륨(Sodium gluconate), 설탕(Sugar) 등을 단독 또는 2 이상 혼합하여 사용하는 것이 바람직하다.Such a coagulation retarder is preferably used alone or in combination of two or more thereof, such as tartaric acid, citric acid, sodium gluconate, and sugar.
본 발명에 의한 시멘트 혼합물은 실리카흄, 메타카올린 등의 고강도 혼합재 1~10%중량% 정도를 추가로 사용하는 것이 바람직한데, 이는 분말도 6,000cm2/g~250,000cm2/g의 고미분말로서, 이에 포함된 SiO2성분이 시멘트 수화물(Ca(OH)2)과 포졸란 반응을 통해 C-S-H(Calcium silicate hydrate) 수화물을 생성하여 내부 공극을 치밀화 시킴으로써 고강도 및 고내구성을 확보하도록 하며, 시멘트 콘크리트 중의 알칼리 성분과 반응하여 알칼리 성분이 콘크리트에 미치는 악영향을 저감시킨다.The cement admixture according to the present invention may further preferably contain about 1 to 10% by weight of high-strength admixtures such as silica fume and meta-kaolin. The cement admixture may include powder of about 6,000 to about 250,000 cm2 / g (SiO2) reacts with cement hydrate (Ca (OH) 2) to form a hydrate of calcium silicate hydrate (CSH) through pozzolanic reaction to densify the internal voids to ensure high strength and high durability. It reduces the adverse effect of alkali component on concrete.
또한 본 발명에 의한 혼합물은 에틸렌 비닐 아세테이트계, 아크릴계, 라텍스계, 폴리비닐알콜계 등의 재유화 분말수지 0.05~5중량% 정도를 추가로 포함하는 것이 바람직하다.The mixture according to the present invention may further preferably contain about 0.05 to 5% by weight of a re-emulsified powdery resin such as ethylene vinyl acetate, acrylic, latex or polyvinyl alcohol.
이는 콘크리트 원재료의 혼합 시 물에 녹아 내부에 균질하게 분산되고, 수지 내에 잉여수를 흡착하여 블리딩 발생을 억제하며, 경화 후 시멘트 메트릭스 내부 수화물 공극 상에 가교(Bridge)를 형성함으로써 공극 충전효과를 얻도록 하고, 접착력이 우수하여 하부구조와 부착강도를 높여주며, 필름 막의 형성에 의해 제설재로부터 발생하는 Cl-및 Ca2+ 이온의 침투을 차단하고, 취성적인 시멘트 경화물의 파괴거동을 연성거동으로 유도하여 도로 포장체의 안전성을 높인다.This is because it dissolves in water when it is mixed with the concrete raw material and is homogeneously dispersed in the inside of it, adsorbs surplus water in the resin to suppress the occurrence of bleeding, and forms a bridge on the pore of the hydrate inside the cement matrix after curing, It is possible to prevent the penetration of Cl- and Ca2 + ions generated from the barrier material by the formation of the film film and to induce the fracture behavior of the brittle cement hardened by the ductile behavior, Thereby enhancing the safety of the package.
나아가 본 발명에 의한 혼합물은 살폰산염계, 폴리칼본산계 등의 분산제 분말 0.1~2.0중량% 정도를 추가로 포함하는 것이 바람직한데, 이는 콘크리트의 유동성의 개선에 효과적이다.Further, it is preferable that the mixture according to the present invention further contains about 0.1 to 2.0% by weight of powder of a dispersant such as a sulfonate-based or polycarboxylic acid-based dispersant, which is effective for improving the fluidity of the concrete.
Claims (1)
고로슬래그 미분말 20~40중량%;
플라이 애쉬 10~30중량%;
공업용 소석회 0.5~5중량%;
무수석고 3~10중량%;
응결지연제 0.05~1중량%;
고강도 혼합재 1~10%중량%;를
포함하는 것을 특징으로 하는 기능성 수축방지제를 적용한 시멘트 혼합조성물 및 이를 이용한 조강 및 초조강 도로포장 및 보수시공방법.30 to 50% by weight of cement;
20 to 40% by weight of fine blast furnace slag powder;
10 to 30% by weight of fly ash;
0.5 to 5% by weight of industrial slaked lime;
3 to 10% by weight of anhydrous gypsum;
0.05 to 1% by weight of a coagulation retarder;
1 to 10% by weight of a high strength mixed material;
And a method for packaging and repairing crude steel and hardened steel using the same.
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| KR1020160092648A KR20180011390A (en) | 2016-07-21 | 2016-07-21 | Cement for pavement and repairment |
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| KR1020160092648A KR20180011390A (en) | 2016-07-21 | 2016-07-21 | Cement for pavement and repairment |
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| KR20180011390A true KR20180011390A (en) | 2018-02-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190135721A (en) * | 2018-05-29 | 2019-12-09 | 한국전력공사 | Composition for shrinkage reduction cement, methods for manufacturing thesame and mortar composition |
| KR102366626B1 (en) * | 2021-10-07 | 2022-02-24 | 주식회사 대광소재 | A High early stlength Cement Composition for Pavement of Roads and Constructing Methods Using Thereof |
-
2016
- 2016-07-21 KR KR1020160092648A patent/KR20180011390A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190135721A (en) * | 2018-05-29 | 2019-12-09 | 한국전력공사 | Composition for shrinkage reduction cement, methods for manufacturing thesame and mortar composition |
| KR102366626B1 (en) * | 2021-10-07 | 2022-02-24 | 주식회사 대광소재 | A High early stlength Cement Composition for Pavement of Roads and Constructing Methods Using Thereof |
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