KR20100109677A - Concrete composite for repair of pavement - Google Patents
Concrete composite for repair of pavement Download PDFInfo
- Publication number
- KR20100109677A KR20100109677A KR20090028051A KR20090028051A KR20100109677A KR 20100109677 A KR20100109677 A KR 20100109677A KR 20090028051 A KR20090028051 A KR 20090028051A KR 20090028051 A KR20090028051 A KR 20090028051A KR 20100109677 A KR20100109677 A KR 20100109677A
- Authority
- KR
- South Korea
- Prior art keywords
- fly ash
- early
- concrete composition
- road pavement
- reducing agent
- 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
- 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
-
- 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
-
- 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
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00068—Mortar or concrete mixtures with an unusual water/cement ratio
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/05—Materials having an early high strength, e.g. allowing fast demoulding or formless casting
-
- 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
Abstract
Description
본 발명은 토목 기술분야에 관한 것으로서, 상세하게는 도로보수에 사용되는 콘크리트 조성물에 관한 것이다.The present invention relates to the field of civil engineering, and more particularly, to a concrete composition used for road repair.
일반적으로 도로포장에는 차량에 의해 발생하는 교통하중 및 기후변화에 의한 환경하중 등의 작용으로 인하여 여러 형태의 파손이 발생한다. In general, various types of damage occur in road pavement due to the effects of traffic loads caused by vehicles and environmental loads caused by climate change.
이와 같이 파손이 발생한 도로포장은 서비스능력 향상 및 공용성 증진을 위해 주기적인 유지보수를 필요로 한다. The road pavement in which such damage occurs requires periodic maintenance to improve service capability and increase commonality.
또한, 도로포장 구조물의 보수작업을 위해서는 교통의 폐쇄가 불가피한데, 이에 따른 불편을 최소화하기 위해서는 최대한 빠른 시공이 가능하도록 속경 재료를 사용하여야 한다.In addition, the closing of traffic is inevitable for the maintenance work of the road pavement structure, in order to minimize the inconvenience caused by the fast diameter material should be used to enable the fastest possible construction.
이러한 재료를 제조하기 위한 하나의 방법으로서, 콘크리트에 플라이 애시(Fly Ash)를 혼화재로 첨가하는 방식이 연구되고 있는데, 이는 워커빌러티를 개선하고 포졸란 반응에 의해 장기강도가 우수하다는 장점을 갖는다.As one method for producing such a material, a method of adding fly ash to the concrete as a admixture has been studied, which has the advantage of improving workability and excellent long-term strength by the pozzolanic reaction.
그러나, 종래와 같이 플라이 애시를 혼화재로 첨가한 콘크리트는 초기강도가 좋지 못하다는 근본적 문제가 있으므로, 조기교통개방을 위한 포장보수재료에 적합하지 않다는 문제를 안고 있었다.However, the conventional concrete added fly ash as admixtures, as in the prior art has a problem that the initial strength is not good, there is a problem that it is not suitable for pavement repair material for early traffic opening.
본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 초기강도 및 장기강도가 모두 우수하여, 신속한 교통개방을 이룰 수 있으면서도, 도로포장 구조물의 내구성 증진과 수명연장의 효과를 얻도록 하는 도로포장보수용 콘크리트 조성물을 제시함을 그 목적으로 한다.The present invention has been made to solve the above problems, excellent in both the initial strength and long-term strength, while achieving the rapid opening of the road, road paving to achieve the effect of improving the durability and life extension of the road paving structure. The purpose is to present a concrete composition for repair.
본 발명은 상술한 바와 같은 목적을 달성하기 위하여, 조강시멘트(단위 시멘트량) 312~420kg을 기준으로, 고분말도 플라이 애시 10~20 중량%(단위 바인더량 대비); 조강형 고성능 감수제 0.5~1.0 중량%(단위 바인더량 대비);를 포함하는 것을 특징으로 하는 조기교통개방을 위한 도로포장보수용 콘크리트 조성물을 제시한다.The present invention, in order to achieve the object as described above, based on the crude steel cement (unit cement amount) 312 ~ 420kg, 10 to 20% by weight of the high-powder fly ash (relative to the amount of binder unit); It proposes a concrete composition for road pavement repair for early traffic opening, characterized in that it comprises ;;
상기 고분말도 플라이 애시는 6,000 브레인 이상의 입자를 갖는 것이 바람직하다.The high powder fly fly ash preferably has 6,000 brain or more particles.
상기 조강형 고성능 감수제는 폴리카르본산계 고성능 감수제를 포함하는 것이 바람직하다.It is preferable that the said crude steel type high performance water reducing agent contains a polycarboxylic acid type high performance water reducing agent.
물-시멘트비는 36~41 중량%인 것이 바람직하다.The water-cement ratio is preferably 36 to 41% by weight.
잔골재는 34~40 중량%(단위골재량 대비)인 것이 바람직하다.The fine aggregate is preferably 34 to 40% by weight (relative to the amount of aggregate).
굵은골재는 60~66 중량%(단위골재량 대비)인 것이 바람직하다.Coarse aggregate is preferably 60 to 66% by weight (relative to unit aggregate amount).
상기 굵은골재의 최대치수는 13~32 mm인 것이 바람직하다.The maximum dimension of the coarse aggregate is preferably 13 to 32 mm.
본 발명은 초기강도 및 장기강도가 모두 우수하여, 신속한 교통개방을 이룰 수 있으면서도, 도로포장 구조물의 내구성 증진과 수명연장의 효과를 얻도록 하는 도로포장보수용 콘크리트 조성물을 제시함을 그 목적으로 한다.It is an object of the present invention to propose a concrete composition for road pavement repair, which is excellent in both initial strength and long-term strength, and can achieve rapid traffic opening, and improve the durability of road paving structures and extend the life span. .
본 발명에 의한 도로포장보수용 콘크리트 조성물은 기본적으로, 조강시멘트(단위 시멘트량) 312~420kg을 기준으로 하여, 고분말도 플라이 애시 10~20 중량%(단위 바인더량 대비); 조강형 고성능 감수제 0.5~1.0 중량%(단위 바인더량 대비);를 포함하여 구성된다.Concrete composition for road pavement repair according to the present invention is basically, based on 312 ~ 420kg of crude steel cement (unit cement amount), 10 to 20% by weight of high-powder fly ash (relative to binder amount); The crude steel high performance water reducing agent 0.5 ~ 1.0% by weight (relative to the amount of binder); is configured to include.
여기서, 조강시멘트는 KS L 5201의 3종 포틀랜드시멘트의 규격을 만족하는 것을 의미한다.Here, the roughening cement means satisfying the specifications of the three portland cement of KS L 5201.
고분말도 플라이 애시(Ultra Fine Fly Ash)는 일반적으로 6,000 브레인 이상의 고분말에 의해 형성되는 플라이 애시를 의미하며, 입자가 가는 것을 사용하는 경우 조기강도, 장기강도, 내구성 등의 측면에서 더 유리하다. Ultra fine fly ash (Ultra Fine Fly Ash) generally refers to fly ash formed by high powder of 6,000 brains or more, and when the particle is used, it is more advantageous in terms of early strength, long-term strength and durability.
즉, 일반 플라이 애시(약 3,000 브레인 정도)를 적용할 경우에는 상술한 바와 같이 조기강도 기준을 만족시키기 어려우나, 고분말도 플라이 애시를 적용할 경우 일반 플라이 애시에 비하여 워커빌리티가 크게 향상되므로 더 낮은 물-시멘트비를 적용할 수 있고, 입자크기가 작아 초기에 충전효과 또한 개선되므로, 조기강도 기준을 충분히 만족시킬 수 있다. In other words, when the general fly ash (about 3,000 brains) is applied, it is difficult to meet the early strength standards as described above, but when the high-powder fly ash is applied, the workability is significantly improved compared to the general fly ash. Cement ratio can be applied, the particle size is small, the filling effect is also improved initially, so that the early strength criteria can be sufficiently satisfied.
내구성 측면에서도 고분말도 플라이 애시가 일반 플라이 애시에 비해 더 우수한 것으로 보고되고 있다. In terms of durability, high-powder fly ash is reported to be superior to general fly ash.
본 발명은 이와 같이, 기본적으로 조강(3종)시멘트에 의해 제조되는 콘크리트에 더하여, 고분말도 플라이 애시 및 조강형 고성능 감수제를 첨가함으로써, 물-시멘트비를 크게 낮추고, 작은 입자에 의한 충전효과로 인하여 조기강도의 발현에 의한 단시간 내 도로포장보수작업을 가능하도록 한 것이다.Thus, the present invention, in addition to the concrete produced by the crude steel (three kinds) cement, by adding a high-powder fly ash and a crude high-performance water reducing agent, significantly lower the water-cement ratio, early due to the filling effect of small particles It is to enable road pavement repair work in a short time due to the development of strength.
조강형 고성능 감수제로는 폴리카르본산계 고성능 감수제를 사용하는 것이 좋은데, 이는 Polycarbone산계 가교 polymer로서 종래의 AE감수제에 비하여 높은 감수성을 가지고 있어 단위 수량을 대폭 감소시킬 수 있다는 특징이 있다.It is preferable to use a polycarboxylic acid-based high-performance sensitizer as the crude steel high performance sensitizer, which is a polycarbone acid-based crosslinked polymer, which has a high sensitivity compared to a conventional AE sensitizer, and has a characteristic of greatly reducing the unit quantity.
폴리카르본산계 고성능 감수제의 물성은 표 1과 같다.Physical properties of the polycarboxylic acid-based high performance water reducing agent are shown in Table 1.
상술한 바와 같이, 본 발명에 의한 조성물은 물-시멘트비를 대폭 줄일 수 있는데, 구체적으로는 36~41 중량% 정도가 포함되는 것이 바람직하다.As described above, the composition according to the present invention can significantly reduce the water-cement ratio, specifically, it is preferable to include about 36 to 41% by weight.
잔골재는 34~40 중량%(단위골재량 대비)인 것이 좋고, 굵은골재는 60~66 중량%(단위골재량 대비)인 것이 바람직하며, 굵은골재의 최대치수는 13~32 mm 정도가 적절하다.The fine aggregate is preferably 34 to 40% by weight (relative to the amount of aggregate), the coarse aggregate is preferably 60 to 66% by weight (relative to the amount of aggregate), and the maximum size of the coarse aggregate is about 13 to 32 mm.
이하, 본 발명에 의한 조성물의 물성을 입증하기 위한 시험례에 대하여 설명한다.Hereinafter, a test example for demonstrating the physical properties of the composition according to the present invention will be described.
표 2는 비교예 1 내지 4 및 본 발명의 실시예 1,2의 구성성분 및 배합비를 나타낸 배합표이다.Table 2 is a compounding table showing the components and the compounding ratio of Comparative Examples 1 to 4 and Examples 1 and 2 of the present invention.
비교예 1 내지 3(표 2의 상측 3가지 배합)은 일반 플라이 애시가 혼합된 콘크리트에 관한 것으로서, 비교예 1은 플라이 애시를 혼합하지 않은 경우, 비교예 2는 단위 바인더량 대비 10 중량%를 플라이 애시로 치환한 경우, 비교예 3은 단위 바인더량 대비 10 중량%를 플라이 애시로 치환한 경우이다.Comparative Examples 1 to 3 (the upper three formulations of Table 2) relate to concrete in which a general fly ash is mixed, and Comparative Example 1 is not mixed with fly ash, and Comparative Example 2 is 10% by weight based on the amount of unit binder. When substituted with fly ash, Comparative Example 3 is a case where 10% by weight relative to the amount of the unit binder is replaced with fly ash.
비교예 4 및 실시예 1,2(표 2의 하측 3가지 배합)은 고분말도 플라이 애시가 혼합된 콘크리트에 관한 것으로서, 비교예 4는 고분말도 플라이 애시를 혼합하지 않은 경우, 실시예 1은 단위 바인더량 대비 10 중량%를 고분말도 플라이 애시로 치환한 경우, 실시예 2는 단위 바인더량 대비 20 중량%를 고분말도 플라이 애시로 치환한 경우이다.Comparative Example 4 and Examples 1 and 2 (lower three formulations in Table 2) relate to concrete in which high-powder fly ash is mixed. In Comparative Example 4, when high-powder fly ash is not mixed, Example 1 is a unit. When 10% by weight relative to the amount of binder is replaced with a high powder fly fly ash, Example 2 is a case where 20% by weight relative to the amount of a binder is replaced with a high powder fly fly ash.
물-시멘트비(물-바인더비)는 40 중량%로 하였고, 공히 조강형 고성능 감수제 0.5 중량%를 적용하였다.The water-cement ratio (water-binder ratio) was 40 wt%, and 0.5 wt% of the crude high performance water reducing agent was applied.
표 3은 위 비교예 및 실시예의 재령 1일 압축강도 시험결과를 비교하여 나타낸 것이다.Table 3 shows a comparison of the results of the age-old compressive strength test results of the above Comparative Example and Example.
일반 플라이 애시이든, 고분말도 플라이 애시이든, 플라이 애시 혼합 콘크리트의 강도(비교예 2,3 및 실시예 1,2)가 이를 혼합하지 않은 콘크리트(비교예 1, 비교예 4)에 비해 어느 정도 약하게 되는 것은 기본적으로 피할 수 없다.Whether it is ordinary fly ash, high-powder or fly ash, the strength of the fly ash mixed concrete (Comparative Examples 2,3 and Examples 1, 2) is somewhat weaker than that of the non-mixed concrete (Comparative Examples 1, 4). Being basically inevitable.
그러나, 일반 플라이 애시 10~20%를 치환한 경우(비교예 2,3)에 비해 고분말도 플라이 애시 10~20%를 치환한 경우(실시예 1,2)가 113% 우수한 압축강도를 나타냄을 알 수 있었다.However, when 10 to 20% of high-powder fly ash was substituted (Examples 1 and 2) compared to the case of replacing 10 to 20% of general fly ash (Comparative Examples 2 and 3), the compressive strength was 113%. Could know.
표 4는 위 비교예 및 실시예의 재령 3일 압축강도 시험결과를 비교하여 나타낸 것이다.Table 4 shows the comparison of the results of the three-day compressive strength test of the above Comparative Example and Example.
일반 플라이 애시 10~20%를 치환한 경우(비교예 2,3)에 비해 고분말도 플라이 애시 10~20%를 치환한 경우(실시예 1,2)가 122~124% 우수한 압축강도를 나타냄을 알 수 있었다.Compared with the case of replacing 10 to 20% of ordinary fly ash (Comparative Examples 2 and 3), the case of replacing 10 to 20% of high-powder fly ash (Examples 1 and 2) shows excellent compressive strength of 122 to 124%. Could know.
표 6은 비교예 4 및 실시예 1,2의 공기량 및 슬럼프 시험결과를 비교하여 나타낸 것이다.Table 6 compares the air amounts and slump test results of Comparative Example 4 and Examples 1 and 2 and shows them.
표 5는 비교예 4 및 실시예 1,2의 공기량 및 슬럼프 시험결과를 비교하여 나타낸 것이다.Table 5 compares the air amounts and slump test results of Comparative Example 4 and Examples 1 and 2 and shows them.
공기량은 상호 큰 차이가 없었으나, 고분말도 플라이 애시의 치환량이 많을수록 대단히 우수한 슬럼프를 나타냄을 알 수 있었다.There was no significant difference in the amount of air, but it was found that the higher the amount of substitution of the fly ash, the more excellent the slump.
이상은 본 발명에 의해 구현될 수 있는 바람직한 실시예의 일부에 관하여 설명한 것에 불과하므로, 주지된 바와 같이 본 발명의 범위는 위의 실시예에 한정되어 해석되어서는 안 될 것이며, 위에서 설명된 본 발명의 기술적 사상과 그 근본을 함께 하는 기술적 사상은 모두 본 발명의 범위에 포함된다고 할 것이다.Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090028051A KR101121555B1 (en) | 2009-04-01 | 2009-04-01 | Concrete composite for repair of pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090028051A KR101121555B1 (en) | 2009-04-01 | 2009-04-01 | Concrete composite for repair of pavement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20100109677A true KR20100109677A (en) | 2010-10-11 |
| KR101121555B1 KR101121555B1 (en) | 2012-03-06 |
Family
ID=43130593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020090028051A KR101121555B1 (en) | 2009-04-01 | 2009-04-01 | Concrete composite for repair of pavement |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101121555B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101599629B1 (en) * | 2014-09-04 | 2016-03-04 | 강원대학교산학협력단 | Pavement Concrete Using Low-Grade Iron Ores |
| CN106587794A (en) * | 2016-11-07 | 2017-04-26 | 福建省泉州市公路局 | Cement-based grouting treatment material and preparation method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101642923B1 (en) * | 2013-10-29 | 2016-07-26 | 한국남동발전 주식회사 | Cement Concrete Containing Admixture Of Silica Alumina Extracted From Coal Ash, And Producing Method Thereof |
| KR101796932B1 (en) | 2015-06-12 | 2017-11-14 | (주)콘텍이엔지 | Concrete for repairing road and road repairing method |
| KR102348637B1 (en) | 2020-12-17 | 2022-01-07 | 정한균 | High strength road pavement composition for early traffic opening |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7465350B2 (en) * | 2001-05-29 | 2008-12-16 | Taiheiyo Cement Corporation | Hydraulic composition |
| KR100880908B1 (en) | 2008-11-27 | 2009-02-04 | 임원순 | Cement concrete composite and pavement method for concrete bridge using the same |
-
2009
- 2009-04-01 KR KR1020090028051A patent/KR101121555B1/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101599629B1 (en) * | 2014-09-04 | 2016-03-04 | 강원대학교산학협력단 | Pavement Concrete Using Low-Grade Iron Ores |
| CN106587794A (en) * | 2016-11-07 | 2017-04-26 | 福建省泉州市公路局 | Cement-based grouting treatment material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101121555B1 (en) | 2012-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111533504A (en) | Ultrahigh-performance concrete formed by mixing machine-made sand and aeolian sand and preparation method thereof | |
| CN104402330A (en) | Dry-mixed self-leveling mortar | |
| KR100873514B1 (en) | Binder for concrete having ultra high strength and a method for manufacturing concrete using the binder | |
| CN109574566B (en) | Concrete and preparation method thereof | |
| KR101121555B1 (en) | Concrete composite for repair of pavement | |
| KR100909212B1 (en) | Concrete composition for repair of pavement | |
| CN102775110B (en) | Cementing material with strength grade of above 200MPa and preparation method thereof | |
| CN107265969B (en) | Micro-expansive concrete | |
| CN104496327A (en) | Wet-mixed masonry mortar prepared by adopting aggregate chips | |
| KR102424551B1 (en) | Concrete composition for revealing early strength | |
| CN111662053A (en) | Polypropylene fiber concrete and preparation method thereof | |
| KR20110077144A (en) | Concrete composition revealing early-strength | |
| CN101423361A (en) | Steel slag concrete formulation | |
| CN114368946A (en) | Mineral admixture hydraulic concrete | |
| JP6521608B2 (en) | High durability concrete | |
| KR101985750B1 (en) | Ultra-high rapid hardening and ultra-early strong polymer modified concrete containing organic and inorganic phase transition material, and a road reparing method therewith | |
| Bhikshma et al. | Studies on effect of maximum size of aggregate in higher grade concrete with high volume fly ash | |
| Bhardwaj et al. | Effect of waste foundry sand addition on strength, permeability and microstructure of ambient cured geopolymer concrete | |
| US20220064067A1 (en) | Flexible Concrete | |
| Kumar et al. | MECHANICAL & DURABILITY CHARACTERISTICS OF WOLLASTONITE BASED CEMENT CONCRETE. | |
| CN110885204B (en) | Anti-cracking reinforcing material for long-life concrete product and preparation method and application thereof | |
| JP2019142732A (en) | Hydraulic composition and concrete | |
| CN107673700A (en) | A kind of the underwater of lower shrinkage does not decompose self-compacting concrete | |
| KR101366062B1 (en) | Concrete composition for bridge pavement and manufacturing method thereof | |
| CN109133816B (en) | Pouring type repairing material with high early strength and deformation resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| N231 | Notification of change of applicant | ||
| E902 | Notification of reason for refusal | ||
| AMND | Amendment | ||
| E601 | Decision to refuse application | ||
| AMND | Amendment | ||
| J201 | Request for trial against refusal decision | ||
| B701 | Decision to grant | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20150203 Year of fee payment: 4 |
|
| FPAY | Annual fee payment |
Payment date: 20151224 Year of fee payment: 5 |
|
| FPAY | Annual fee payment |
Payment date: 20161226 Year of fee payment: 6 |
|
| FPAY | Annual fee payment |
Payment date: 20180201 Year of fee payment: 7 |
|
| FPAY | Annual fee payment |
Payment date: 20190201 Year of fee payment: 8 |
|
| FPAY | Annual fee payment |
Payment date: 20200217 Year of fee payment: 9 |