KR102229199B1 - Early-strength cement concrete composition with excellent crack resistance for repairing road and repairing method for road pavement using the same - Google Patents

Early-strength cement concrete composition with excellent crack resistance for repairing road and repairing method for road pavement using the same Download PDF

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KR102229199B1
KR102229199B1 KR1020200091355A KR20200091355A KR102229199B1 KR 102229199 B1 KR102229199 B1 KR 102229199B1 KR 1020200091355 A KR1020200091355 A KR 1020200091355A KR 20200091355 A KR20200091355 A KR 20200091355A KR 102229199 B1 KR102229199 B1 KR 102229199B1
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South Korea
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weight
parts
road pavement
crack resistance
concrete composition
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KR1020200091355A
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Korean (ko)
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우양이
홍경자
이준호
이도일
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주식회사 대광소재
이준호
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  • Architecture (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
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  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to an early-strength cement concrete composition for road pavement repair with excellent crack resistance and a road pavement repair method using the same. The composition contains 10 to 40 wt% of a crack-reducing binder, 30 to 50 wt% of fine aggregate, 20 to 40 wt% of coarse aggregate, 0.1 to 10 wt% of water, and 0.1 to 10 wt% of performance improvement admixture. The crack-reducing binder contains 50 to 70 parts by weight of cobalt sulfate, 20 to 40 parts by weight of boron nitride, 20 to 40 parts by weight of zinc chloride, 10 to 30 parts by weight of lithium metaphosphate, 10 to 30 parts by weight of gypsum, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of chlorite, and 1 to 10 parts by weight of calcium aluminoferrite, with respect to 100 parts by weight of early-strength Portland cement. The performance improvement admixture contains 80 to 100 parts by weight of trimethoxysilylpropyl methacrylate, 20 to 40 parts by weight of 3-ureidopropyltrimethoxysilane, 20 to 40 parts by weight of 6-oxo-2-piperidinecarboxylic acid, 10 to 30 parts by weight of (meth)acryloyloxyalkyl isocyanate, 10 to 30 parts by weight of propyl gallate, 10 to 30 parts by weight of zinc dialkyldithiophosphate, 10 to 30 parts by weight of molybdenum dithiocarbamate, and 1 to 10 parts by weight of thioacetamide with respect to 100 parts by weight of trimethoxysilylethylstyrene. The composition for road pavement repair of present invention is excellent in crack resistance and early-strength properties, thereby significantly shortening construction period and improving basic physical properties.

Description

균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물 및 이를 이용한 도로포장 보수공법{EARLY-STRENGTH CEMENT CONCRETE COMPOSITION WITH EXCELLENT CRACK RESISTANCE FOR REPAIRING ROAD AND REPAIRING METHOD FOR ROAD PAVEMENT USING THE SAME}Crude steel cement concrete composition for road pavement repair with excellent crack resistance, and road pavement repair method using the same

본 발명은 균열 저항성이 우수하고, 조강성이 우수하여 공사기간이 대폭 단축되고, 기본적인 제반물성도 개선된 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물 및 이를 이용한 도로포장 보수공법에 관한 것이다.The present invention relates to a crude steel cement concrete composition for road pavement repair with excellent crack resistance and excellent crude stiffness, so that the construction period is greatly shortened and basic general properties are improved, and a road pavement repair method using the same.

일반적으로, 콘크리트 구조물을 제작하거나 포장 시에는 건조수축에 의한 균열이 발생하며, 표면에 블리이딩으로 인한 레이탄스가 발생하여 표면 강도가 약하고 내구성이 떨어진다는 단점이 있다. 이러한 콘크리트의 균열은 염해, 열화와 같은 외적 환경원인, 설계하중, 소성수축 또는 건조수축과 같은 재료 특성, 배합조건, 시공적인 요인 등의 여러 가지 요인에 의하여 많이 발생한다.In general, there is a disadvantage in that when a concrete structure is manufactured or paved, cracks are generated due to drying shrinkage, and levance due to bleeding occurs on the surface, resulting in weak surface strength and poor durability. Such cracks in concrete are often caused by various factors such as external environmental causes such as salt damage and deterioration, design load, material properties such as plastic shrinkage or dry shrinkage, mixing conditions, and constructional factors.

특히, 도로포장은 기온의 변화에 따른 신축과 팽창 및 강설 또는 강우에 의해 포장층 하부에 발생하는 스펀지 현상으로 인해 포장층의 받침력이 저하되어 포장층에 균열이 생기거나 차량 하중 등에 의해 균열이 빈번히 발생한다. 포장층에 균열 등이 발생하게 되면 그 틈으로 우수 등이 침투하여 도로의 손상부가 신속히 확장되고 도로 위를 달리는 차량 하중에 의해 균열이 진행되기 때문에 신속한 보수가 필요하다.In particular, in road pavements, the support of the pavement layer decreases due to the spongy phenomenon occurring in the lower part of the pavement layer due to expansion and expansion according to changes in temperature, snowfall or rainfall, causing cracks in the pavement layer or cracks due to vehicle load, etc. Occurs frequently. When a crack occurs in the pavement layer, rainwater penetrates through the gap, and the damaged part of the road quickly expands and the crack progresses by the load of a vehicle running on the road, so rapid repair is required.

또한, 콘크리트 구조물 특히, 교량 콘크리트 슬래브, 도로 노면, 날개벽, 도로 측구부, 교량 하부, 교각은 열화 등에 의해 콘크리트에 균열이 발생하여 시간이 지나게 되면 콘크리트의 압축강도와 철근의 인장강도가 점차 떨어지게 되고, 균열 부위를 통해 노출된 콘크리트는 염소이온 침투, 동결융해, 중성화 현상이 진행되어 철근 부식이 발생된다. 이러한 철근 부식현상이 심해지면 콘크리트 구조물이 결국은 붕괴될 수 있다.In addition, concrete structures, in particular, bridge concrete slabs, road surfaces, wing walls, road sides, bridge bottoms, and piers are cracked due to deterioration, and as time passes, the compressive strength of the concrete and the tensile strength of the reinforcing bar gradually decrease. , Concrete exposed through cracks undergoes chloride ion penetration, freezing and thawing, and neutralization phenomena, leading to corrosion of reinforcing bars. If the corrosion phenomenon of reinforcing bars intensifies, the concrete structure may eventually collapse.

이러한 문제점을 개선하기 위하여, 일반적으로 콘크리트 도로는 손상된 부분을 제거하고 재포장 등의 도로포장 보수공법으로 보수하였다. 이러한 보수공법은 보수부분의 내구수명 등에 있어서 유리하지만, 재포장된 도로 또한 최초 포장된 부분과 보수된 부분에 단차가 생기게 되어 주행하는 차량에 충격을 주게 되거나, 재포장된 콘크리트가 경화되어 필요로 하는 강도를 발현하기 위해서는 일정 기간 양생하여야 함으로 일정 시간 동안 차량의 통행을 제한하여야 하는 문제점이 있었다.In order to improve this problem, in general, the damaged part of the concrete road was removed and repaired by a road pavement repair method such as repaving. This repair method is advantageous in terms of the durability life of the repaired part, but the repaved road also has a step difference between the initially paved part and the repaired part, causing an impact on the driving vehicle or hardening of the repaved concrete. There is a problem in that the passage of the vehicle must be restricted for a certain period of time because curing for a certain period of time is required in order to express the strength of the vehicle.

이러한 콘크리트 구조물과 같이 부식이나 침식이 많이 일어나는 부위를 신속하게 보수 또는 보강하기 위한 보수공사에는 조강 포틀랜드 시멘트(3종 시멘트)가 널리 사용되고 있다. 하지만, 이러한 조강 시멘트는 보통 포틀랜드 시멘트에 비하여 시공성이 우수한 장점이 있으나, 투수성이 높아 염화물이나 수분의 침투가 발생하여 콘크리트가 부식되는 문제가 있다.Crude steel Portland cement (class 3 cement) is widely used in repair work for quickly repairing or reinforcing areas where corrosion or erosion occurs a lot, such as concrete structures. However, these crude steel cements have an advantage of superior workability compared to ordinary Portland cements, but they have high water permeability, so that chloride or moisture infiltrates occur, and thus concrete is corroded.

대한민국 특허등록 제10-1796418호Korean Patent Registration No. 10-1796418 대한민국 특허등록 제10-1940645호Korean Patent Registration No. 10-1940645 대한민국 특허등록 제10-2058316호Korean Patent Registration No. 10-2058316

본 발명은 상술한 문제점을 해결하기 위해 안출된 것으로서, 본 발명의 일 구현예는 균열 저항성이 우수하고, 조강성이 우수하여 공사기간이 대폭 단축되고, 기본적인 제반물성도 개선된 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 제공하고자 하는 것이다.The present invention has been devised to solve the above-described problems, and an embodiment of the present invention has excellent crack resistance, excellent roughness, so that the construction period is significantly shortened, and the basic general properties are improved. It is intended to provide a crude steel cement concrete composition for pavement repair.

또한, 본 발명의 다른 일 구현 예는 상기 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 이용한 도로포장 보수공법을 제공하고자 하는 것이다.In addition, another embodiment of the present invention is to provide a road pavement repair method using the crude steel cement concrete composition for road pavement repair having excellent crack resistance.

본 발명이 해결하고자 하는 다양한 과제들은 이상에서 언급한 과제들에 제한되지 않으며, 언급되지 않은 또 다른 과제들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.Various problems to be solved by the present invention are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

본 발명의 일 구현예는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물로서, 균열 저감형 결합재 10 내지 40 중량%, 잔골재 30 내지 50 중량%, 굵은골재 20 내지 40 중량%, 물 0.1 내지 10 중량% 및 성능개선 혼화제 0.1 내지 10 중량%를 포함하고; 상기 균열 저감형 결합재는 조강 포틀랜드 시멘트 100 중량부에 대하여, 황산 코발트 50 내지 70 중량부, 질화붕소 20 내지 40 중량부, 염화아연 20 내지 40 중량부, 메타인산리튬 10 내지 30 중량부, 석고 10 내지 30 중량부, 칼슘설포알루미네이트 10 내지 30 중량부, 크로라이트 1 내지 10 중량부 및 칼슘 알루미노페라이트 1 내지 10 중량부를 포함하고; 상기 성능개선 혼화제는 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 트리메톡시실릴프로필 (메트)아크릴레이트 80 내지 100 중량부, 3-우레이도 프로필트리메톡시 실란 20 내지 40 중량부, 6-옥소-2-피페리딘카르본산 20 내지 40 중량부, (메트)아크릴로일옥시알킬 이소시아네이트 10 내지 30 중량부, 프로필갈레이트 10 내지 30 중량부, 아연디알킬디티오포스페이트 10 내지 30 중량부, 몰리브덴 디티오카바메이트 10 내지 30 중량부 및 티오아세트아미드 1 내지 10 중량부를 포함하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 제공한다.One embodiment of the present invention is a crude steel cement concrete composition for road pavement repair having excellent crack resistance, 10 to 40% by weight of a crack reducing binder, 30 to 50% by weight of fine aggregate, 20 to 40% by weight of coarse aggregate, 0.1 to 10 of water It contains 0.1 to 10% by weight of the admixture for improving the performance and by weight; The crack reducing binder is 50 to 70 parts by weight of cobalt sulfate, 20 to 40 parts by weight of boron nitride, 20 to 40 parts by weight of zinc chloride, 10 to 30 parts by weight of lithium metaphosphate, 10 to 30 parts by weight of gypsum based on 100 parts by weight of crude steel Portland cement. To 30 parts by weight, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of chromite, and 1 to 10 parts by weight of calcium aluminoferite; The performance-improving admixture is trimethoxysilylpropyl (meth)acrylate 80 to 100 parts by weight, 3-ureido propyltrimethoxy silane 20 to 40 parts by weight, 6- 20 to 40 parts by weight of oxo-2-piperidinecarboxylic acid, 10 to 30 parts by weight of (meth)acryloyloxyalkyl isocyanate, 10 to 30 parts by weight of propyl gallate, 10 to 30 parts by weight of zinc dialkyldithiophosphate , Molybdenum dithiocarbamate 10 to 30 parts by weight and 1 to 10 parts by weight of thioacetamide It provides a crude steel cement concrete composition for road pavement repair excellent in crack resistance.

상기 질화붕소는 비표면적이 600 내지 1,000 m2/g인 다공성 질화붕소인 것이고; 상기 다공성 질화붕소는 TiB2 및 TiN을 B와 N의 몰비율이 1:1이 되도록 혼합하는 단계; 상기 혼합물을 고에너지 볼 밀을 이용하여, 물리적으로 분쇄하는 단계; 상기 분쇄된 혼합물을 300 내지 1,200 ℃의 온도에서 5분 내지 5시간 동안 가열하여 염소 기체(Cl2)와 같은 할로겐 기체와 반응시키는 단계; 및 수소 분위기 하에서 400 내지 600℃의 온도에서 10분 내지 2시간 동안 가열하는 단계를 포함하는 제조방법에 의하여 제조되는 것을 사용할 수 있다.The boron nitride is a porous boron nitride having a specific surface area of 600 to 1,000 m 2 /g; The porous boron nitride is mixed with TiB 2 and TiN so that the molar ratio of B and N is 1:1; Physically pulverizing the mixture using a high energy ball mill; Heating the pulverized mixture at a temperature of 300 to 1,200° C. for 5 minutes to 5 hours to react with a halogen gas such as chlorine gas (Cl 2 ); And heating for 10 minutes to 2 hours at a temperature of 400 to 600° C. in a hydrogen atmosphere may be used.

상기 다공성 질화붕소는 상기 다공성 질화붕소 100 중량부에, 알코올성 하이드록실기를 갖는 불포화 단량체 60 내지 80 중량%, 퍼하이드로폴리실라잔 1 내지 20 중량%, 테트라(C1 내지 C4)알킬 암모늄 하이드록사이드 1 내지 20 중량% 및 도데실벤젠술폰산 1 내지 20 중량%를 포함하는 표면 개질용액 100 내지 300 중량부에 혼합하여, 초음파 처리한 후, 1 내지 7 시간 동안 숙성시켜 표면을 개질시키는 것을 사용할 수 있다.The porous boron nitride is 100 parts by weight of the porous boron nitride, 60 to 80% by weight of an unsaturated monomer having an alcoholic hydroxyl group, 1 to 20% by weight of perhydropolysilazane, tetra (C1 to C4) alkyl ammonium hydroxide It is mixed with 100 to 300 parts by weight of a surface modification solution containing 1 to 20% by weight and 1 to 20% by weight of dodecylbenzenesulfonic acid, subjected to ultrasonic treatment, and then aged for 1 to 7 hours to modify the surface. .

상기 메타인산리튬은 비정질의 메타인산리튬(LiPO3) 및 결정질의 메타인산리튬을 1: 1 내지 5 중량비율로 혼합한 것이고; 상기 비정질의 메타인산리튬(LiPO3)은 수산화리튬(LiOH)을 인산에 pH 4이하로 용해시켜 인산리튬 수용액을 제조하는 단계, 및 상기 인산리튬 수용액을 400 내지 500 ℃의 온도로 가열된 챔버에 열간분무(spray pyrolysis)함으로써 비정질의 메타인산리튬을 수득하는 단계를 포함하는 제조방법에 의하여 제조되는 것이고; 상기 결정질의 메타인산리튬은 상기 비정질의 메타인산리튬을 150 내지 450 ℃의 온도로 열처리하여 결정질의 메타인산리튬을 수득하는 단계를 포함하는 제조방법에 의하여 제조되는 것을 사용할 수 있다.The lithium metaphosphate is a mixture of amorphous lithium metaphosphate (LiPO 3 ) and crystalline lithium metaphosphate in a weight ratio of 1: 1 to 5; The amorphous lithium metaphosphate (LiPO 3 ) is prepared by dissolving lithium hydroxide (LiOH) in phosphoric acid at a pH of 4 or less to prepare a lithium phosphate aqueous solution, and the lithium phosphate aqueous solution in a chamber heated to a temperature of 400 to 500 °C. It is produced by a manufacturing method comprising the step of obtaining amorphous lithium metaphosphate by spray pyrolysis; The crystalline lithium metaphosphate may be prepared by a manufacturing method comprising the step of heat-treating the amorphous lithium metaphosphate at a temperature of 150 to 450°C to obtain crystalline lithium metaphosphate.

또한, 본 발명의 다른 일 구현 예는 상기 본 발명의 일 구현 예에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 이용한 도로포장 보수공법으로서, 도로면을 파쇄기, 평삭기, 숏블라스터를 이용하여 절삭, 블라스팅하여 레이탄스 및 불순물을 제거하는 단계; 제거된 부위를 청소하는 단계; 청소된 부위에 살수하여 습윤상태를 유지하는 단계; 습윤상태 유지 후 높은 접착력 및 방수효과를 얻기 위하여 브루밍 또는 프라이머 처리하는 단계; 브루밍 또는 프라이머 처리한 상부에, 상기 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 타설하는 단계; 타설 후 상부의 수분 증발을 방지하여 초기 소성균열을 방지하기 위하여 양생제를 살포하는 단계; 양생제 살포 후 균열 유발 및 미끄럼 저항치를 높이기 위하여 타이닝하는 단계; 및 양생하는 단계를 포함하는 도로포장 보수공법을 제공한다.In addition, another embodiment of the present invention is a road pavement repair method using a crude steel cement concrete composition for repairing road pavement having excellent crack resistance according to the embodiment of the present invention. Cutting and blasting to remove latans and impurities; Cleaning the removed area; Sprinkling on the cleaned area to maintain a moist state; Blooming or primer treatment to obtain high adhesion and waterproof effect after maintaining the wet state; Pouring a crude steel cement concrete composition for repairing road pavements having excellent crack resistance on the top of the blooming or primer treatment; Spraying a curing agent to prevent initial plastic cracking by preventing evaporation of water at the top after pouring; A step of tinting in order to induce cracking and increase a sliding resistance value after application of the curing agent; And it provides a road pavement repair method comprising the step of curing.

본 발명의 일 구현 예에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물 및 이를 이용한 도로포장 보수공법에 따르면, 조강성이 우수하여 공사기간이 대폭 단축되고, 교통 통제 시간을 최소화할 수 있는 효과가 있다. 또한, 시멘트의 초기 수화 및 포졸란 반응에 의한 조직의 치밀화를 촉진하여, 기존 교면 포장과의 우수한 부착성능, 휨강도 및 압축강도 등 기본적인 제반 물성도 개선됨은 물론, 균열 저항성이 뛰어난 효과가 있다.According to the crude steel cement concrete composition for road pavement repair with excellent crack resistance according to an embodiment of the present invention and the road pavement repair method using the same, the construction period is greatly shortened due to excellent crude stiffness, and the traffic control time can be minimized. It works. In addition, by promoting the densification of the structure due to the initial hydration and pozzolanic reaction of cement, basic physical properties such as excellent adhesion performance, flexural strength, and compressive strength with the existing bridge pavement are improved, as well as excellent crack resistance.

이하, 본 발명의 구현 예를 상세히 설명하기로 한다. 다만, 이는 예시로서 제시되는 것으로, 이에 의해 본 발명이 제한되지는 않으며 본 발명은 후술할 청구범위의 범주에 의해 정의될 뿐이다.Hereinafter, embodiments of the present invention will be described in detail. However, this is presented as an example, and the present invention is not limited thereby, and the present invention is only defined by the scope of the claims to be described later.

본 발명의 일 구현 예는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물로서, 균열 저감형 결합재 10 내지 40 중량%, 잔골재 30 내지 50 중량%, 굵은골재 20 내지 40 중량%, 물 0.1 내지 10 중량% 및 성능개선 혼화제 0.1 내지 10 중량%를 포함하고; 상기 균열 저감형 결합재는 조강 포틀랜드 시멘트 100 중량부에 대하여, 황산 코발트 50 내지 70 중량부, 질화붕소 20 내지 40 중량부, 염화아연 20 내지 40 중량부, 메타인산리튬 10 내지 30 중량부, 석고 10 내지 30 중량부, 칼슘설포알루미네이트 10 내지 30 중량부, 크로라이트 1 내지 10 중량부 및 칼슘 알루미노페라이트 1 내지 10 중량부를 포함하고; 상기 성능개선 혼화제는 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 트리메톡시실릴프로필 (메트)아크릴레이트 80 내지 100 중량부, 3-우레이도 프로필트리메톡시 실란 20 내지 40 중량부, 6-옥소-2-피페리딘카르본산 20 내지 40 중량부, (메트)아크릴로일옥시알킬 이소시아네이트 10 내지 30 중량부, 프로필갈레이트 10 내지 30 중량부, 아연디알킬디티오포스페이트 10 내지 30 중량부, 몰리브덴 디티오카바메이트 10 내지 30 중량부 및 티오아세트아미드 1 내지 10 중량부를 포함하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 제공한다.One embodiment of the present invention is a crude steel cement concrete composition for road pavement repair with excellent crack resistance, 10 to 40% by weight of a crack reducing binder, 30 to 50% by weight of fine aggregate, 20 to 40% by weight of coarse aggregate, 0.1 to 10 of water It contains 0.1 to 10% by weight of the admixture for improving the performance and by weight; The crack reducing binder is 50 to 70 parts by weight of cobalt sulfate, 20 to 40 parts by weight of boron nitride, 20 to 40 parts by weight of zinc chloride, 10 to 30 parts by weight of lithium metaphosphate, 10 to 30 parts by weight of gypsum based on 100 parts by weight of crude steel Portland cement. To 30 parts by weight, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of chromite, and 1 to 10 parts by weight of calcium aluminoferite; The performance-improving admixture is trimethoxysilylpropyl (meth)acrylate 80 to 100 parts by weight, 3-ureido propyltrimethoxy silane 20 to 40 parts by weight, 6- 20 to 40 parts by weight of oxo-2-piperidinecarboxylic acid, 10 to 30 parts by weight of (meth)acryloyloxyalkyl isocyanate, 10 to 30 parts by weight of propyl gallate, 10 to 30 parts by weight of zinc dialkyldithiophosphate , Molybdenum dithiocarbamate 10 to 30 parts by weight and 1 to 10 parts by weight of thioacetamide It provides a crude steel cement concrete composition for road pavement repair excellent in crack resistance.

본 발명의 일 구현 예에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물 및 이를 이용한 도로포장 보수공법에 따르면, 조강성이 우수하여 공사기간이 대폭 단축되고, 교통 통제 시간을 최소화할 수 있는 효과가 있다. 또한, 시멘트의 초기 수화 및 포졸란 반응에 의한 조직의 치밀화를 촉진하여, 기존 교면 포장과의 우수한 부착성능, 휨강도 및 압축강도 등 기본적인 제반 물성도 개선됨은 물론, 균열 저항성이 뛰어난 효과가 있다.According to the crude steel cement concrete composition for road pavement repair with excellent crack resistance according to an embodiment of the present invention and the road pavement repair method using the same, the construction period is greatly shortened due to excellent crude stiffness, and the traffic control time can be minimized. It works. In addition, by promoting the densification of the structure due to the initial hydration and pozzolanic reaction of cement, basic physical properties such as excellent adhesion performance, flexural strength, and compressive strength with the existing bridge pavement are improved, as well as excellent crack resistance.

본 발명의 일 구현 예에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물은 균열 저감형 결합재 10 내지 40 중량%, 잔골재 30 내지 50 중량%, 굵은골재 20 내지 40 중량%, 물 0.1 내지 10 중량% 및 성능개선 혼화제 0.1 내지 10 중량%를 포함한다.The crude steel cement concrete composition for road pavement repair having excellent crack resistance according to an embodiment of the present invention includes 10 to 40% by weight of a crack reducing binder, 30 to 50% by weight of fine aggregate, 20 to 40% by weight of coarse aggregate, and 0.1 to 10 of water. It contains 0.1 to 10% by weight of the admixture to improve the weight and performance.

본 발명에서 사용하는 골재는 잔골재와 굵은골재로 구분되며, 입경이 5 mm 이하인 것을 잔골재라 하고 입경이 5 mm 보다 큰 것을 굵은골재로 구분한다. 본 발명의 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물에 대하여 상기 잔골재는 30 내지 50 중량% 함유되는 것이 바람직하고, 상기 굵은골재는 20 내지 40 중량% 함유되는 것이 바람직하다.Aggregates used in the present invention are divided into fine aggregates and coarse aggregates, and those with a particle diameter of 5 mm or less are referred to as fine aggregates, and those with a particle diameter of greater than 5 mm are classified as coarse aggregates. With respect to the crude steel cement concrete composition for road pavement repair having excellent crack resistance of the present invention, the fine aggregate is preferably contained in an amount of 30 to 50% by weight, and the coarse aggregate is preferably contained in an amount of 20 to 40% by weight.

상기 균열 저감형 결합재는 조강 포틀랜드 시멘트 100 중량부에 대하여, 황산 코발트 50 내지 70 중량부, 질화붕소 20 내지 40 중량부, 염화아연 20 내지 40 중량부, 메타인산리튬 10 내지 30 중량부, 석고 10 내지 30 중량부, 칼슘설포알루미네이트 10 내지 30 중량부, 크로라이트 1 내지 10 중량부 및 칼슘 알루미노페라이트 1 내지 10 중량부를 포함할 수 있다.The crack reducing binder is 50 to 70 parts by weight of cobalt sulfate, 20 to 40 parts by weight of boron nitride, 20 to 40 parts by weight of zinc chloride, 10 to 30 parts by weight of lithium metaphosphate, 10 to 30 parts by weight of gypsum based on 100 parts by weight of crude steel Portland cement. To 30 parts by weight, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of chromite, and 1 to 10 parts by weight of calcium aluminoferite.

상기 조강 포틀랜드 시멘트는 분말도가 3,000 내지 5,000 ㎠/g인 것이 바람직하다. 상기 조강 포틀랜드 시멘트의 분말도가 너무 낮은 경우에는 반응성이 저하되어 초기강도 발현이 늦어질 수 있고, 상기 분말도가 너무 높은 경우에는 반응성이 과도하게 높아져 작업성이 저하되고 균열발생이 우려될 수 있다.It is preferable that the crude steel Portland cement has a powderiness of 3,000 to 5,000 ㎠/g. If the powderyness of the crude steel Portland cement is too low, the reactivity may decrease and the initial strength may be delayed, and if the powderyness is too high, the reactivity may be excessively high, resulting in a decrease in workability and the occurrence of cracks. .

상기 황산 코발트는 빠른 경화를 돕고, 우수한 강도발현, 수축 방지, 염해 및 동결융해 저항성을 향상시키는 기능을 한다. 상기 황산 코발트는 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 50 내지 70 중량부로 함유되는 것이 바람직하다. 상기 황산 코발트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 황산 코발트의 함량이 너무 많은 경우에는 장기강도가 저하될 수 있는 문제점이 있다.The cobalt sulfate functions to aid in rapid hardening, to develop excellent strength, to prevent shrinkage, and to improve resistance to salt damage and freezing and thawing. The cobalt sulfate is preferably contained in an amount of 50 to 70 parts by weight based on 100 parts by weight of the crude steel Portland cement. If the content of cobalt sulfate is too small, the above-described improvement effect may be weak, and if the content of cobalt sulfate is too high, there is a problem that long-term strength may be reduced.

상기 질화붕소는 우수한 강도발현, 수축 방지 및 내마모성을 개선하고, 빠른 경화특성을 보조하여, 조강성을 나타내는 기능을 한다. 상기 질화붕소는 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 20 내지 40 중량부로 함유되는 것이 바람직하다. 상기 질화붕소는 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 50 내지 70 중량부로 함유되는 것이 바람직하다. 상기 질화붕소의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 질화붕소의 함량이 너무 많은 경우에는 경화속도가 지나치게 빨라져 작업성이 저하되거나 제조원가가 높아져 가격경쟁력이 저하될 수 있는 문제점이 있다.The boron nitride functions to exhibit excellent strength, anti-shrinkage, and abrasion resistance, as well as to aid in rapid hardening properties and to exhibit coarse rigidity. The boron nitride is preferably contained in an amount of 20 to 40 parts by weight based on 100 parts by weight of the crude steel Portland cement. The boron nitride is preferably contained in an amount of 50 to 70 parts by weight based on 100 parts by weight of the crude steel Portland cement. If the content of boron nitride is too small, there is a problem that the above-described improvement effect may be weak, and if the content of boron nitride is too high, the curing speed becomes too fast and workability decreases or manufacturing cost increases, thereby reducing price competitiveness. There is a problem that can be.

이러한 상기 질화붕소는 비표면적이 600 내지 1,000 m2/g인 다공성 질화붕소인 것을 사용하여, 상기한 효과 뿐만 아니라, 수축 방지 및 균열 방지 효과를 매우 향상시킬 수 있다.The boron nitride is a porous boron nitride having a specific surface area of 600 to 1,000 m 2 /g, and thus, not only the above effects, but also the shrinkage prevention and crack prevention effects can be greatly improved.

보다 구체적으로 상기 다공성 질화붕소는 TiB2 및 TiN을 B와 N의 몰비율이 1:1이 되도록 혼합하는 단계; 상기 혼합물을 고에너지 볼 밀을 이용하여, 물리적으로 분쇄하는 단계; 상기 분쇄된 혼합물을 300 내지 1,200 ℃의 온도에서 5분 내지 5시간 동안 가열하여 염소 기체(Cl2)와 같은 할로겐 기체와 반응시키는 단계; 및 수소 분위기 하에서 400 내지 600℃의 온도에서 10분 내지 2시간 동안 가열하는 단계를 포함하는 제조방법에 의하여 제조되는 것을 보다 바람직하게 사용할 수 있다.More specifically, the porous boron nitride is a step of mixing TiB 2 and TiN so that the molar ratio of B and N is 1:1; Physically pulverizing the mixture using a high energy ball mill; Heating the pulverized mixture at a temperature of 300 to 1,200° C. for 5 minutes to 5 hours to react with a halogen gas such as chlorine gas (Cl 2 ); And heating for 10 minutes to 2 hours at a temperature of 400 to 600° C. in a hydrogen atmosphere may be more preferably used.

이때, 상기 다공성 질화붕소는 상기한 다공성 질화붕소 100 중량부에, 알코올성 하이드록실기를 갖는 불포화 단량체 60 내지 80 중량%, 퍼하이드로폴리실라잔 1 내지 20 중량%, 테트라(C1 내지 C4)알킬 암모늄 하이드록사이드 1 내지 20 중량% 및 도데실벤젠술폰산 1 내지 20 중량%를 포함하는 표면 개질용액 100 내지 300 중량부에 혼합하여, 초음파 처리한 후, 1 내지 7 시간 동안 숙성시켜 표면을 친수성으로 개질시킴으로써, 상기한 효과 뿐만 아니라, 콘크리트 구체에 대한 접착강도를 매우 개선할 수 있는 효과가 있다. At this time, the porous boron nitride is 100 parts by weight of the porous boron nitride described above, 60 to 80% by weight of an unsaturated monomer having an alcoholic hydroxyl group, 1 to 20% by weight of perhydropolysilazane, tetra (C1 to C4) alkyl ammonium It is mixed with 100 to 300 parts by weight of a surface modification solution containing 1 to 20% by weight of hydroxide and 1 to 20% by weight of dodecylbenzenesulfonic acid, subjected to ultrasonic treatment, and then aged for 1 to 7 hours to modify the surface to be hydrophilic. By doing so, as well as the above effect, there is an effect that can greatly improve the adhesive strength to the concrete sphere.

이때, 상기 알코올성 하이드록실기를 갖는 불포화 단량체는 2-하이드록시에틸 아크릴레이트, 다이에틸렌 글리콜 아크릴레이트, 폴리에틸렌 글리콜 아크릴레이트, 메톡시다이에틸렌 글리콜 아크릴레이트, 메톡시폴리에틸렌 글리콜 아크릴레이트, 에톡시다이에틸렌 글리콜 아크릴레이트, 에톡시폴리에틸렌 글리콜 아크릴레이트, 2-하이드록시프로필 아크릴레이트, 다이프로필렌 글리콜 아크릴레이트, 폴리프로필렌 글리콜 아크릴레이트, 메톡시폴리프로필렌 글리콜 아크릴레이트, 에톡시폴리프로필렌 글리콜 아크릴레이트; 다이에틸렌 글리콜 다이아크릴레이트, 폴리에틸렌 글리콜 다이아크릴레이트; 2-하이드록시에틸 메타크릴레이트, 다이에틸렌 글리콜 메타크릴레이트, 폴리에틸렌 글리콜 메타크릴레이트, 메톡시다이에틸렌 글리콜 메타크릴레이트, 메톡시폴리에틸렌 글리콜 메타크릴레이트, 에톡시다이에틸렌 글리콜 메타크릴레이트, 에톡시폴리에틸렌 글리콜 메타크릴레이트, 2-하이드록시프로필 메타크릴레이트, 다이프로필렌 글리콜 메타크릴레이트, 폴리프로필렌 글리콜 메타크릴레이트, 메톡시폴리프로필렌 글리콜 메타크릴레이트, 에톡시폴리프로필렌 글리콜 메타크릴레이트; 다이에틸렌 글리콜 다이메타크릴레이트, 폴리에틸렌 글리콜 다이메타크릴레이트, 다이프로필렌 글리콜 다이메타크릴레이트, 폴리프로필렌 글리콜 다이메타크릴레이트; 글리세릴 (메트)아크릴레이트 및 이들의 혼합 단량체로 이루어진 군에서 선택되는 1종 이상인 것을 사용할 수 있다. At this time, the unsaturated monomer having an alcoholic hydroxyl group is 2-hydroxyethyl acrylate, diethylene glycol acrylate, polyethylene glycol acrylate, methoxydiethylene glycol acrylate, methoxypolyethylene glycol acrylate, ethoxydiethylene Glycol acrylate, ethoxypolyethylene glycol acrylate, 2-hydroxypropyl acrylate, dipropylene glycol acrylate, polypropylene glycol acrylate, methoxypolypropylene glycol acrylate, ethoxypolypropylene glycol acrylate; Diethylene glycol diacrylate, polyethylene glycol diacrylate; 2-hydroxyethyl methacrylate, diethylene glycol methacrylate, polyethylene glycol methacrylate, methoxydiethylene glycol methacrylate, methoxypolyethylene glycol methacrylate, ethoxydiethylene glycol methacrylate, ethoxy Polyethylene glycol methacrylate, 2-hydroxypropyl methacrylate, dipropylene glycol methacrylate, polypropylene glycol methacrylate, methoxypolypropylene glycol methacrylate, ethoxypolypropylene glycol methacrylate; Diethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, dipropylene glycol dimethacrylate, polypropylene glycol dimethacrylate; One or more selected from the group consisting of glyceryl (meth)acrylate and mixed monomers thereof may be used.

또한, 상기 표면 개질용액은 폴리퍼플루오로술폰산 0.1 내지 10 중량%를 더 포함하여, 조강성과, 접착 강도, 염해 및 동결융해 저항성을 더욱 개선할 수 있는 효과가 있다.In addition, the surface modification solution further includes 0.1 to 10% by weight of polyperfluorosulfonic acid, and has an effect of further improving coarse stiffness, adhesive strength, salt and freeze-thaw resistance.

또한, 상기 초음파 처리는 100 내지 150 Hz 세기로 0.5 내지 3시간 동안 수행되는 것이 바람직하다.In addition, the ultrasonic treatment is preferably performed for 0.5 to 3 hours at an intensity of 100 to 150 Hz.

상기 염화아연은 우수한 수축 방지 효과를 제공하고, 동시에 염해 및 동결융해 저항성을 향상시키는 기능을 한다. 상기 염화아연은 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 20 내지 40 중량부로 함유되는 것이 바람직하다. 상기 염화아연의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 염화아연의 함량이 너무 많은 경우에는 작업성이 저하되거나 제조원가가 높아져 가격경쟁력이 저하될 수 있는 문제점이 있다.The zinc chloride serves to provide an excellent anti-shrink effect and at the same time improve salt and freeze-thaw resistance. The zinc chloride is preferably contained in an amount of 20 to 40 parts by weight based on 100 parts by weight of the crude steel Portland cement. If the content of zinc chloride is too small, there is a problem that the above-described improvement effect may be weak, and if the content of zinc chloride is too much, there is a problem that workability may be reduced or manufacturing cost may be increased, resulting in a decrease in price competitiveness. have.

상기 메타인산리튬은 우수한 강도발현, 수축 및 균열 방지 및 내마모성을 개선하는 기능을 한다. 상기 메타인산리튬은 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 10 내지 30 중량부로 함유되는 것이 바람직하다. 상기 메타인산리튬의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 메타인산리튬의 함량이 너무 많은 경우에는 작업성이 저하되거나 제조원가가 높아져 가격경쟁력이 저하될 수 있는 문제점이 있다.The lithium metaphosphate functions to develop excellent strength, prevent shrinkage and cracking, and improve abrasion resistance. The lithium metaphosphate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the crude steel Portland cement. If the content of the lithium metaphosphate is too small, there is a problem that the above-described improvement effect may be weak, and if the content of the lithium metaphosphate is too high, the workability may decrease or the manufacturing cost may increase, thereby reducing price competitiveness. There is a problem.

이러한 상기 메타인산리튬은 비정질의 메타인산리튬(LiPO3) 및 결정질의 메타인산리튬을 1: 1 내지 5 중량비율로 혼합한 것을 사용하여, 상기한 효과 뿐만 아니라, 염해 및 동결융해 저항성을 매우 향상시킬 수 있는 효과가 있다.The lithium metaphosphate is a mixture of amorphous lithium metaphosphate (LiPO 3 ) and crystalline lithium metaphosphate in a weight ratio of 1: 1 to 5, and as well as the above effects, resistance to salt and freezing and thawing is greatly improved. There is an effect that can be made.

이때, 상기 비정질의 메타인산리튬(LiPO3)은 수산화리튬(LiOH)을 인산에 pH 4이하로 용해시켜 인산리튬 수용액을 제조하는 단계, 및 상기 인산리튬 수용액을 400 내지 500 ℃의 온도로 가열된 챔버에 열간분무(spray pyrolysis)함으로써 비정질의 메타인산리튬을 수득하는 단계를 포함하는 제조방법에 의하여 제조되는 것을 사용할 수 있고; 상기 결정질의 메타인산리튬은 상기 비정질의 메타인산리튬을 150 내지 450 ℃의 온도로 열처리하여 결정질의 메타인산리튬을 수득하는 단계를 포함하는 제조방법에 의하여 제조되는 것을 사용할 수 있다.At this time, the amorphous lithium metaphosphate (LiPO 3 ) is a step of preparing a lithium phosphate aqueous solution by dissolving lithium hydroxide (LiOH) in phosphoric acid at a pH of 4 or less, and heating the lithium phosphate aqueous solution to a temperature of 400 to 500°C. What is produced by a manufacturing method comprising the step of obtaining amorphous lithium metaphosphate by spray pyrolysis in the chamber can be used; The crystalline lithium metaphosphate may be prepared by a manufacturing method comprising the step of heat-treating the amorphous lithium metaphosphate at a temperature of 150 to 450°C to obtain crystalline lithium metaphosphate.

상기 석고는 초기 강도 발현 및 수축 방지 효과를 개선하는 기능을 한다. 상기 석고는 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 10 내지 30 중량부로 함유되는 것이 바람직하다. 상기 석고의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 석고의 함량이 너무 많은 경우에는 과팽창 또는 내수성이 저하될 수 있는 문제점이 있다.The gypsum functions to develop initial strength and improve the effect of preventing shrinkage. The gypsum is preferably contained in an amount of 10 to 30 parts by weight, based on 100 parts by weight of the crude steel Portland cement. When the content of the gypsum is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the gypsum is too much, there is a problem that the over-expansion or water resistance may be deteriorated.

상기 칼슘설포알루미네이트는 빠른 경화특성을 제공하여, 조강성을 나타내는 기능을 한다. 상기 칼슘설포알루미네이트는 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 10 내지 30 중량부로 함유되는 것이 바람직하다. 상기 칼슘설포알루미네이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 칼슘설포알루미네이트의 함량이 너무 많은 경우에는 경화속도가 지나치게 빨라져 작업성이 저하되거나 제조원가가 높아져 가격경쟁력이 저하될 수 있는 문제점이 있다.The calcium sulfoaluminate provides a fast curing property and functions to exhibit crude stiffness. The calcium sulfoaluminate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the crude steel Portland cement. When the content of the calcium sulfoaluminate is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the calcium sulfoaluminate is too high, the curing speed becomes too fast, resulting in a decrease in workability or a high manufacturing cost. There is a problem in which price competitiveness may be lowered.

상기 크로라이트는 우수한 강도발현, 수축 방지, 내마모성, 염해 및 동결융해 저항성을 향상시키고, 구체 콘크리트에 대한 접착강도를 개선하는 기능을 한다. 상기 크로라이트는 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 1 내지 10 중량부로 함유되는 것이 바람직하다. 상기 크로라이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 크로라이트의 함량이 너무 많은 경우에는 작업성이 저하되거나 제조원가가 높아져 가격경쟁력이 저하될 수 있는 문제점이 있다.The chromite functions to develop excellent strength, prevent shrinkage, improve abrasion resistance, resistance to salt damage and freeze-thaw, and improve adhesion strength to concrete concrete. The chromite is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the crude steel Portland cement. When the content of the chromite is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the chromite is too large, there is a problem that the workability is lowered or the manufacturing cost is increased, thereby reducing the price competitiveness. have.

상기 칼슘 알루미노페라이트는 우수한 강도발현, 수축 방지 및 내마모성을 개선하는 기능을 한다. 상기 칼슘 알루미노페라이트는 상기 조강 포틀랜드 시멘트 100 중량부에 대하여, 1 내지 10 중량부로 함유되는 것이 바람직하다. 상기 칼슘 알루미노페라이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 칼슘 알루미노페라이트의 함량이 너무 많은 경우에는 작업성이 저하되거나 제조원가가 높아져 가격경쟁력이 저하될 수 있는 문제점이 있다.The calcium aluminoferite functions to exhibit excellent strength, prevent shrinkage, and improve abrasion resistance. The calcium aluminoferite is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the crude steel Portland cement. If the content of the calcium aluminoferite is too small, the above-described improvement effect may be weak, and if the content of the calcium aluminoferite is too high, the workability is lowered or the manufacturing cost is increased, leading to a decrease in price competitiveness. There is a problem that can be.

한편, 상기 성능개선 혼화제는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물에 대하여, 0.1 내지 10 중량% 함유되는 것이 바람직하다. 상기 성능개선 혼화제의 함량이 너무 적은 경우에는 경화시간, 작업성, 강도, 내구성, 특히 염해 및 동결융해 저항성의 개선 효과가 미약할 수 있는 문제점이 있고; 상기 성능개선 혼화제의 함량이 너무 많은 경우에는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물의 점도가 낮아져 작업성(슬럼프)은 좋아지나, 수화반응을 지연시켜 초기 압축강도 발현을 저하시킴과 동시에 가격 경쟁력이 저하될 수 있는 문제점이 있다.On the other hand, the performance-improving admixture is preferably contained in an amount of 0.1 to 10% by weight with respect to the crude steel cement concrete composition for repairing road pavement having excellent crack resistance. If the content of the performance-improving admixture is too small, there is a problem in that the effect of improving curing time, workability, strength, durability, especially salt and freeze-thaw resistance may be weak; If the content of the performance-improving admixture is too high, the viscosity of the crude steel cement concrete composition for road pavement repair, which has excellent crack resistance, decreases, resulting in improved workability (slump), but delays the hydration reaction to lower the initial compressive strength. There is a problem in that price competitiveness may decrease.

상기 성능개선 혼화제는 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 트리메톡시실릴프로필 (메트)아크릴레이트 80 내지 100 중량부, 3-우레이도 프로필트리메톡시 실란 20 내지 40 중량부, 6-옥소-2-피페리딘카르본산 20 내지 40 중량부, (메트)아크릴로일옥시알킬 이소시아네이트 10 내지 30 중량부, 프로필갈레이트 10 내지 30 중량부, 아연디알킬디티오포스페이트 10 내지 30 중량부, 몰리브덴 디티오카바메이트 10 내지 30 중량부 및 티오아세트아미드 1 내지 10 중량부를 포함할 수 있다.The performance-improving admixture is trimethoxysilylpropyl (meth)acrylate 80 to 100 parts by weight, 3-ureido propyltrimethoxy silane 20 to 40 parts by weight, 6- 20 to 40 parts by weight of oxo-2-piperidinecarboxylic acid, 10 to 30 parts by weight of (meth)acryloyloxyalkyl isocyanate, 10 to 30 parts by weight of propyl gallate, 10 to 30 parts by weight of zinc dialkyldithiophosphate , Molybdenum dithiocarbamate 10 to 30 parts by weight and thioacetamide 1 to 10 parts by weight may be included.

상기 트리메톡시실릴에틸스티렌은 결합력 및 내구성을 개선하며, 특히, 휨강도, 압축강도 및 접착강도를 매우 개선하는 기능을 한다.The trimethoxysilylethyl styrene improves bonding strength and durability, and in particular, functions to greatly improve flexural strength, compressive strength and adhesive strength.

상기 트리메톡시실릴프로필 (메트)아크릴레이트는 반응성을 촉진하여 강도 및 내구성을 더욱 개선하는 기능을 한다. 상기 트리메톡시실릴프로필 (메트)아크릴레이트는 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 80 내지 100 중량부로 함유되는 것이 바람직하다. 상기 트리메톡시실릴프로필 (메트)아크릴레이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 트리메톡시실릴프로필 (메트)아크릴레이트의 함량이 너무 많은 경우에는 반응속도가 너무 빨라져 작업성이 저하되거나 가격 경쟁력이 저하될 수 있는 문제점이 있다.The trimethoxysilylpropyl (meth)acrylate functions to further improve strength and durability by promoting reactivity. The trimethoxysilylpropyl (meth)acrylate is preferably contained in an amount of 80 to 100 parts by weight based on 100 parts by weight of the trimethoxysilylethylstyrene. When the content of the trimethoxysilylpropyl (meth)acrylate is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the trimethoxysilylpropyl (meth)acrylate is too large, the reaction There is a problem in that the speed is too fast to reduce workability or price competitiveness.

상기 3-우레이도 프로필트리메톡시 실란은 방수성 및 반응성을 촉진하여 강도 및 내구성을 더욱 개선하는 기능을 한다. 상기 3-우레이도 프로필트리메톡시 실란은 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 20 내지 40 중량부로 함유되는 것이 바람직하다. 상기 3-우레이도 프로필트리메톡시 실란의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 3-우레이도 프로필트리메톡시 실란의 함량이 너무 많은 경우에는 반응속도가 너무 빨라져 작업성이 저하되거나 가격 경쟁력이 저하될 수 있는 문제점이 있다.The 3-ureido propyltrimethoxy silane functions to further improve strength and durability by promoting waterproofness and reactivity. The 3-ureido propyltrimethoxy silane is preferably contained in an amount of 20 to 40 parts by weight based on 100 parts by weight of the trimethoxysilylethylstyrene. When the content of the 3-ureido propyltrimethoxy silane is too small, the above-described improvement effect may be weak, and when the content of the 3-ureido propyltrimethoxy silane is too large, the reaction rate is increased. There is a problem that it becomes too fast to reduce workability or price competitiveness.

상기 6-옥소-2-피페리딘카르본산은 건조수축을 저감하여 균열발생을 저하시키고, 내수성, 염해 및 동결융해 저항성을 개선하며, 반응성이 지나치게 촉진되는 것을 조절하는 기능을 한다. 상기 6-옥소-2-피페리딘카르본산은 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 20 내지 40 중량부로 함유되는 것이 바람직하다. 상기 6-옥소-2-피페리딘카르본산의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 6-옥소-2-피페리딘카르본산의 함량이 너무 많은 경우에는 강도가 저하되거나 가격 경쟁력이 저하될 수 있는 문제점이 있다.The 6-oxo-2-piperidinecarboxylic acid has a function of reducing drying shrinkage to reduce cracking, improving water resistance, salt and freezing and thawing resistance, and controlling excessive acceleration of reactivity. The 6-oxo-2-piperidinecarboxylic acid is preferably contained in an amount of 20 to 40 parts by weight based on 100 parts by weight of trimethoxysilylethylstyrene. When the content of the 6-oxo-2-piperidinecarboxylic acid is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the 6-oxo-2-piperidinecarboxylic acid is too large There is a problem that strength may decrease or price competitiveness may decrease.

상기 (메트)아크릴로일옥시알킬 이소시아네이트는 부착강도 및 내구성을 개선하며, 특히, 염해 및 동결융해 저항성을 개선하는 기능을 한다. 상기 (메트)아크릴로일옥시알킬 이소시아네이트는 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 10 내지 30 중량부로 함유되는 것이 바람직하다. 상기 (메트)아크릴로일옥시알킬 이소시아네이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 (메트)아크릴로일옥시알킬 이소시아네이트의 함량이 너무 많은 경우에는 가격 경쟁력이 저하될 수 있는 문제점이 있다.The (meth)acryloyloxyalkyl isocyanate has a function of improving adhesion strength and durability, and in particular, improving resistance to salt damage and freezing and thawing. The (meth)acryloyloxyalkyl isocyanate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the trimethoxysilylethylstyrene. When the content of the (meth)acryloyloxyalkyl isocyanate is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the (meth)acryloyloxyalkyl isocyanate is too large, price competitiveness is increased. There is a problem that can be degraded.

상기 프로필갈레이트는 산화방지 및 항균성능을 개선하고, 염해 및 동결융해 저항성을 개선하는 기능을 한다. 상기 프로필갈레이트는 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 10 내지 30 중량부로 함유되는 것이 바람직하다. 상기 프로필갈레이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 프로필갈레이트의 함량이 너무 많은 경우에는 가격 경쟁력이 저하될 수 있는 문제점이 있다.The propyl gallate functions to improve anti-oxidation and antibacterial properties, and to improve resistance to salt and freeze-thaw. The propyl gallate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the trimethoxysilylethyl styrene. When the content of the propyl gallate is too small, the above-described improvement effect may be weak, and when the content of the propyl gallate is too large, there is a problem that the price competitiveness may be lowered.

상기 아연디알킬디티오포스페이트는 건조수축을 저감하여 균열발생을 저하시키고, 반응성을 더욱 촉진하여 접착강도 및 내구성을 개선하는 기능을 한다. 상기 아연디알킬디티오포스페이트는 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 10 내지 30 중량부로 함유되는 것이 바람직하다. 상기 아연디알킬디티오포스페이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 아연디알킬디티오포스페이트의 함량이 너무 많은 경우에는 가격 경쟁력이 저하될 수 있는 문제점이 있다.The zinc dialkyldithiophosphate serves to reduce drying shrinkage to reduce cracking, and to further promote reactivity to improve adhesion strength and durability. The zinc dialkyldithiophosphate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the trimethoxysilylethylstyrene. When the content of the zinc dialkyldithiophosphate is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the zinc dialkyldithiophosphate is too large, there is a problem that price competitiveness may be lowered. have.

상기 몰리브덴 디티오카바메이트는 건조수축을 저감하여 균열발생을 저하시키고, 접착강도, 내마모성 및 내구성을 개선하는 기능을 한다. 상기 몰리브덴 디티오카바메이트는 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 10 내지 30 중량부로 함유되는 것이 바람직하다. 상기 몰리브덴 디티오카바메이트의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 몰리브덴 디티오카바메이트의 함량이 너무 많은 경우에는 가격 경쟁력이 저하될 수 있는 문제점이 있다.The molybdenum dithiocarbamate has a function of reducing drying shrinkage, reducing cracking, and improving adhesive strength, abrasion resistance, and durability. The molybdenum dithiocarbamate is preferably contained in an amount of 10 to 30 parts by weight based on 100 parts by weight of the trimethoxysilylethylstyrene. When the content of the molybdenum dithiocarbamate is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the molybdenum dithiocarbamate is too large, there is a problem that price competitiveness may be lowered.

상기 티오아세트아미드는 반응성을 더욱 촉진하여 접착강도, 내마모성 및 내구성을 더욱 개선하는 기능을 한다. 상기 티오아세트아미드는 상기 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 1 내지 10 중량부로 함유되는 것이 바람직하다. 상기 티오아세트아미드의 함량이 너무 적은 경우에는 상기한 개선 효과가 미약할 수 있는 문제점이 있고, 상기 티오아세트아미드의 함량이 너무 많은 경우에는 가격 경쟁력이 저하될 수 있는 문제점이 있다.The thioacetamide further promotes reactivity to further improve adhesion strength, abrasion resistance, and durability. The thioacetamide is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the trimethoxysilylethylstyrene. When the content of the thioacetamide is too small, there is a problem that the above-described improvement effect may be weak, and when the content of the thioacetamide is too large, there is a problem that price competitiveness may be lowered.

본 발명의 바람직한 일 구현 예에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물은 균열 저감형 결합재 10 내지 40 중량%, 잔골재 30 내지 50 중량%, 굵은골재 20 내지 40 중량%를 강제 믹서에서 교반시킨 후, 물 0.1 내지 10 중량% 및 성능개선 혼화제 0.1 내지 10 중량%를 더 혼합하여 소정시간(예컨대, 1 내지 10분) 동안 교반하여 제조할 수 있다.The crude steel cement concrete composition for road pavement repair having excellent crack resistance according to a preferred embodiment of the present invention contains 10 to 40% by weight of a crack-reducing binder, 30 to 50% by weight of fine aggregate, and 20 to 40% by weight of coarse aggregate in a forced mixer. After stirring, 0.1 to 10% by weight of water and 0.1 to 10% by weight of a performance-improving admixture may be further mixed and stirred for a predetermined time (eg, 1 to 10 minutes).

한편, 본 발명의 다른 일 구현 예는 상기한 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 이용한 도로포장 보수공법을 제공한다.On the other hand, another embodiment of the present invention provides a road pavement repair method using a crude steel cement concrete composition for road pavement repair having excellent crack resistance.

상기 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 이용한 도로포장 보수공법은 도로면을 파쇄기, 평삭기, 숏블라스터를 이용하여 절삭, 블라스팅하여 레이탄스 및 불순물을 제거하는 단계; 제거된 부위를 청소하는 단계; 청소된 부위에 살수하여 습윤상태를 유지하는 단계; 습윤상태 유지 후 높은 접착력 및 방수효과를 얻기 위하여 브루밍 또는 프라이머 처리하는 단계; 브루밍 또는 프라이머 처리한 상부에, 상기 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 타설하는 단계; 타설 후 상부의 수분 증발을 방지하여 초기 소성균열을 방지하기 위하여 양생제를 살포하는 단계; 양생제 살포 후 균열 유발 및 미끄럼 저항치를 높이기 위하여 타이닝하는 단계; 및 양생하는 단계를 포함할 수 있다.The road pavement repair method using the crude steel cement concrete composition for road pavement repair having excellent crack resistance includes the steps of cutting and blasting the road surface using a crusher, a planer, and a shot blaster to remove levance and impurities; Cleaning the removed area; Sprinkling on the cleaned area to maintain a moist state; Blooming or primer treatment to obtain high adhesion and waterproof effect after maintaining the wet state; Pouring a crude steel cement concrete composition for repairing road pavements having excellent crack resistance on the top of the blooming or primer treatment; Spraying a curing agent to prevent initial plastic cracking by preventing evaporation of water at the top after pouring; A step of tinting in order to induce cracking and increase a sliding resistance value after application of the curing agent; And curing.

상기 양생하는 단계는, 현장의 온도, 습도, 바람의 세기를 포함하는 대기 상태에 따라 1) 양생제만을 살포하거나, 2) 양생제를 살포한 후 상부에 비닐 또는 양생포를 덮고 살수하여 습윤상태를 유지하거나, 또는 3) 양생제 살포 후 비닐, 양생포, 또는 보온덮개를 이용하여 보온을 유지하면서 양생하는 단계를 구분하여 적용하는 것이 좋다. In the curing step, depending on the atmospheric conditions including the temperature, humidity, and wind strength of the site, 1) only a curing agent is sprayed, or 2) after spraying the curing agent, a vinyl or curing cloth is covered and watered to the top of the wet state. Or 3) After spraying the curing agent, it is better to use a vinyl, curing cloth, or a thermal insulation cover to maintain the heat and apply the curing step separately.

특히, 상기 양생하는 단계에서, 현장 대기 조건(예를 들면, 하절기처럼 대기온도(25℃이상)가 높고 상대습도가 낮으며 바람이 많은 대기조건인 경우에는 양생제 살포 후 비닐, 양생포 등을 덮고 살수하여 습윤상태를 유지한다. 반대로 대기온도(25℃이하)가 높지 않고 상대습도가 높으며 바람이 적은 대기조건인 경우에는 양생제만을 살포하여 양생한다.)에 따라 양생제만을 살포하거나 양생제를 살포한 후 상부에 비닐, 양생포 등을 덮고 살수하여 습윤상태를 유지하면서 양생하는 단계를 구분하여 적용할 수 있다. 또한, 대기온도가 5℃ 이하가 되는 경우에는 양생제 살포 후 비닐, 양생포, 보온덮개 등을 이용하여 보온양생을 실시하는 단계를 더 포함할 수 있다.In particular, in the curing step, in the case of on-site atmospheric conditions (e.g., in the case of high atmospheric temperature (25℃ or higher), low relative humidity, and windy atmospheric conditions, such as in summer, vinyl, curing cloth, etc. after spraying the curing agent) On the contrary, if the air temperature (25℃ or less) is not high, the relative humidity is high, and the wind is low, apply only the curing agent to cure. After spraying, the steps of curing while maintaining the moist state can be applied separately by spraying with vinyl, curing cloth, etc. on the top. In addition, when the air temperature is less than 5 ℃ may further include the step of performing the thermal curing using a vinyl, a curing cloth, a thermal insulation cover, etc. after spraying the curing agent.

이하에서, 상기 브루밍 또는 프라이머 처리는 상기 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물이 콘크리트 슬래브에 부착되기 용이하게 하는 작업을 의미하는 것으로 사용한다. 브루밍재로는 SBR(Styrene Butadiene Rubber) 라텍스, 폴리 아크릴 에스테르(Poly Acryl Ester; PAE), 에폭시 에멀젼, 에틸 비닐 아세테이트(Ethyl Vinyl Acetate; EVA) 및 아크릴 에멀젼 중에서 선택된 적어도 어느 하나인 것을 선택하여 사용할 수 있다. 상기 프라이머 재료로는 SBR(Styrene Butadiene Rubber) 라텍스, 폴리 아크릴 에스테르(Poly Acryl Ester; PAE), 에폭시 에멀젼, 에틸 비닐 아세테이트(Ethyl Vinyl Acetate; EVA) 및 아크릴 에멀젼 중에서 선택된 적어도 어느 하나인 것을 선택하여 사용할 수 있다.Hereinafter, the blooming or primer treatment is used to mean an operation of facilitating the adhesion of the crude steel cement concrete composition for repairing road pavement having excellent crack resistance to a concrete slab. As the blooming material, at least one selected from SBR (Styrene Butadiene Rubber) latex, Poly Acryl Ester (PAE), epoxy emulsion, ethyl vinyl acetate (EVA), and acrylic emulsion can be selected and used. have. As the primer material, at least one selected from SBR (Styrene Butadiene Rubber) latex, Poly Acryl Ester (PAE), epoxy emulsion, ethyl vinyl acetate (EVA), and acrylic emulsion can be selected and used. I can.

본 발명의 일 구현 예에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물 및 이를 이용한 도로포장 보수공법에 따르면, 조강성이 우수하여 공사기간이 대폭 단축되고, 교통 통제 시간을 최소화할 수 있는 효과가 있다. 또한, 시멘트의 초기 수화 및 포졸란 반응에 의한 조직의 치밀화를 촉진하여, 기존 교면 포장과의 우수한 부착성능, 휨강도 및 압축강도 등 기본적인 제반 물성도 개선됨은 물론, 균열 저항성이 뛰어난 효과가 있다.According to the crude steel cement concrete composition for road pavement repair with excellent crack resistance according to an embodiment of the present invention and the road pavement repair method using the same, the construction period is greatly shortened due to excellent crude stiffness, and the traffic control time can be minimized. It works. In addition, by promoting the densification of the structure due to the initial hydration and pozzolanic reaction of cement, basic physical properties such as excellent adhesion performance, flexural strength, and compressive strength with the existing bridge pavement are improved, as well as excellent crack resistance.

이상, 본 발명의 바람직한 실시 예를 들어 상세하게 설명하였으나, 본 발명은 상기 실시 예에 한정되는 것은 아니며, 본 발명의 기술적 사상의 범위 내에서 해당 분야에서 통상의 지식을 가진 자에 의하여 여러 가지 변형이 가능하다.In the above, although a preferred embodiment of the present invention has been described in detail, the present invention is not limited to the above embodiment, and various modifications by those of ordinary skill in the relevant field within the scope of the technical idea of the present invention. This is possible.

<실시예 1><Example 1>

균열 저감형 결합재 33 중량%, 잔골재 32 중량%, 굵은골재 28 중량%를 강제식 믹서에 투입하여 교반한 후, 물 3 중량% 및 성능개선 혼화제 4 중량%를 더 혼합한 다음, 다시 2분간 교반함으로써 본 발명에서 목적으로 하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 제조하였다.33% by weight of the crack-reducing binder, 32% by weight of fine aggregate, and 28% by weight of coarse aggregate were added to the forced mixer and stirred, then 3% by weight of water and 4% by weight of the performance-improving admixture were further mixed, and then stirred for 2 minutes. By doing so, a crude steel cement concrete composition for road pavement repair having excellent crack resistance for the purpose of the present invention was prepared.

이때, 상기 균열 저감형 결합재는 조강 포틀랜드 시멘트 100 중량부에 대하여, 황산 코발트 59 중량부, 질화붕소(비표면적이 870 m2/g) 31 중량부, 염화아연 27 중량부, 비정질의 메타인산리튬 27 중량부, 석고 13 중량부, 칼슘설포알루미네이트 17 중량부, 크로라이트 3 중량부 및 칼슘 알루미노페라이트 3 중량부를 혼합한 것을 사용하였다.At this time, the crack reducing binder is based on 100 parts by weight of crude steel Portland cement, 59 parts by weight of cobalt sulfate , 31 parts by weight of boron nitride (specific surface area 870 m 2 /g), 27 parts by weight of zinc chloride, and amorphous lithium metaphosphate A mixture of 27 parts by weight of gypsum, 13 parts by weight of gypsum, 17 parts by weight of calcium sulfoaluminate, 3 parts by weight of chromite, and 3 parts by weight of calcium aluminoferite was used.

이때, 상기 비정질의 메타인산리튬(LiPO3)은 수산화리튬(LiOH)을 인산에 pH 3.5로 용해시켜 인산리튬 수용액을 제조한 후, 상기 인산리튬 수용액을 약 500 ℃의 온도로 가열된 챔버에 열간분무(spray pyrolysis)함으로써 제조되는 것을 사용하였다.At this time, the amorphous lithium metaphosphate (LiPO 3 ) was prepared by dissolving lithium hydroxide (LiOH) in phosphoric acid at pH 3.5 to prepare a lithium phosphate aqueous solution, and then hot heating the lithium phosphate aqueous solution in a chamber heated to a temperature of about 500°C. What was prepared by spraying (spray pyrolysis) was used.

또한, 상기 성능개선 혼화제는 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 트리메톡시실릴프로필 (메트)아크릴레이트 92 중량부, 3-우레이도 프로필트리메톡시 실란 35 중량부, 6-옥소-2-피페리딘카르본산 22 중량부, (메트)아크릴로일옥시알킬 이소시아네이트 16 중량부, 프로필갈레이트 18 중량부, 아연디알킬디티오포스페이트 15 중량부, 몰리브덴 디티오카바메이트 11 중량부 및 티오아세트아미드 3 중량부를 혼합한 것을 사용하였다.In addition, the performance-improving admixture is based on 100 parts by weight of trimethoxysilylethylstyrene, 92 parts by weight of trimethoxysilylpropyl (meth)acrylate, 35 parts by weight of 3-ureido propyltrimethoxy silane, 6-oxo- 2-piperidinecarboxylic acid 22 parts by weight, (meth)acryloyloxyalkyl isocyanate 16 parts by weight, propyl gallate 18 parts by weight, zinc dialkyldithiophosphate 15 parts by weight, molybdenum dithiocarbamate 11 parts by weight and A mixture of 3 parts by weight of thioacetamide was used.

<실시예 2><Example 2>

균열 저감형 결합재 33 중량%, 잔골재 32 중량%, 굵은골재 28 중량%를 강제식 믹서에 투입하여 교반한 후, 물 3 중량% 및 성능개선 혼화제 4 중량%를 더 혼합한 다음, 다시 2분간 교반함으로써 본 발명에서 목적으로 하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 제조하였다.33% by weight of the crack-reducing binder, 32% by weight of fine aggregate, and 28% by weight of coarse aggregate were added to the forced mixer and stirred, then 3% by weight of water and 4% by weight of the performance-improving admixture were further mixed, and then stirred for 2 minutes. By doing so, a crude steel cement concrete composition for road pavement repair having excellent crack resistance for the purpose of the present invention was prepared.

이때, 상기 균열 저감형 결합재는 조강 포틀랜드 시멘트 100 중량부에 대하여, 황산 코발트 62 중량부, 질화붕소 23 중량부, 염화아연 36 중량부, 메타인산리튬 17 중량부, 석고 20 중량부, 칼슘설포알루미네이트 14 중량부, 크로라이트 5 중량부 및 칼슘 알루미노페라이트 7 중량부를 혼합한 것을 사용하였다.At this time, the crack reducing binder is based on 100 parts by weight of crude steel Portland cement, 62 parts by weight of cobalt sulfate, 23 parts by weight of boron nitride, 36 parts by weight of zinc chloride, 17 parts by weight of lithium metaphosphate, 20 parts by weight of gypsum, calcium sulfoaluminum A mixture of 14 parts by weight of nate, 5 parts by weight of chromite, and 7 parts by weight of calcium aluminoferite was used.

이때, 상기 질화붕소는 비표면적이 975 m2/g인 다공성 질화붕소를 사용하였다. 이때, 상기 다공성 질화붕소는 TiB2 및 TiN을 B와 N의 몰비율이 1:1이 되도록 하여 혼합물을 제조한 후; 상기 혼합물을 고에너지 볼 밀을 이용하여, 물리적으로 분쇄한 후; 상기 분쇄된 혼합물을 약 1,000 ℃의 온도에서 2시간 동안 가열하면서 염소 기체(Cl2)와 반응시킨 후; 수소 분위기 하에서 약 500℃의 온도에서 30분 동안 가열함으로써, 제조되는 것을 사용하였다.At this time, as the boron nitride, porous boron nitride having a specific surface area of 975 m 2 /g was used. At this time, the porous boron nitride was prepared by making a mixture of TiB 2 and TiN at a molar ratio of B and N of 1:1; After physically pulverizing the mixture using a high energy ball mill; The pulverized mixture was heated at a temperature of about 1,000° C. for 2 hours while reacting with chlorine gas (Cl 2 ); The prepared one was used by heating for 30 minutes at a temperature of about 500° C. under a hydrogen atmosphere.

또한, 상기 메타인산리튬은 비정질의 메타인산리튬(LiPO3) 및 결정질의 메타인산리튬을 1: 2 중량비율로 혼합한 것을 사용하였다. 이때, 수산화리튬(LiOH)을 인산에 pH 3.5로 용해시켜 인산리튬 수용액을 제조한 후, 상기 인산리튬 수용액을 약 500 ℃의 온도로 가열된 챔버에 열간분무(spray pyrolysis)함으로써 제조되는 것을 사용하였다. 또한, 상기 결정질의 메타인산리튬은 상기 비정질의 메타인산리튬을 400 ℃의 온도로 열처리함으로써 제조되는 것을 사용하였다.In addition, as the lithium metaphosphate, a mixture of amorphous lithium metaphosphate (LiPO 3 ) and crystalline lithium metaphosphate in a weight ratio of 1: 2 was used. At this time, lithium hydroxide (LiOH) was dissolved in phosphoric acid at pH 3.5 to prepare a lithium phosphate aqueous solution, and then the lithium phosphate aqueous solution was used by spray pyrolysis in a chamber heated to a temperature of about 500°C. . In addition, the crystalline lithium metaphosphate was prepared by heat-treating the amorphous lithium metaphosphate at a temperature of 400°C.

또한, 상기 성능개선 혼화제는 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 트리메톡시실릴프로필 (메트)아크릴레이트 88 중량부, 3-우레이도 프로필트리메톡시 실란 29 중량부, 6-옥소-2-피페리딘카르본산 23 중량부, (메트)아크릴로일옥시알킬 이소시아네이트 17 중량부, 프로필갈레이트 11 중량부, 아연디알킬디티오포스페이트 16 중량부, 몰리브덴 디티오카바메이트 16 중량부 및 티오아세트아미드 4 중량부를 혼합한 것을 사용하였다.In addition, the performance-improving admixture is, based on 100 parts by weight of trimethoxysilylethylstyrene, 88 parts by weight of trimethoxysilylpropyl (meth)acrylate, 29 parts by weight of 3-ureido propyltrimethoxy silane, 6-oxo- 2-piperidinecarboxylic acid 23 parts by weight, (meth)acryloyloxyalkyl isocyanate 17 parts by weight, propyl gallate 11 parts by weight, zinc dialkyldithiophosphate 16 parts by weight, molybdenum dithiocarbamate 16 parts by weight and A mixture of 4 parts by weight of thioacetamide was used.

<실시예 3><Example 3>

균열 저감형 결합재 33 중량%, 잔골재 32 중량%, 굵은골재 28 중량%를 강제식 믹서에 투입하여 교반한 후, 물 3 중량% 및 성능개선 혼화제 4 중량%를 더 혼합한 다음, 다시 2분간 교반함으로써 본 발명에서 목적으로 하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 제조하였다.33% by weight of the crack-reducing binder, 32% by weight of fine aggregate, and 28% by weight of coarse aggregate were added to the forced mixer and stirred, then 3% by weight of water and 4% by weight of the performance-improving admixture were further mixed, and then stirred for 2 minutes. By doing so, a crude steel cement concrete composition for road pavement repair having excellent crack resistance for the purpose of the present invention was prepared.

이때, 상기 균열 저감형 결합재는 조강 포틀랜드 시멘트 100 중량부에 대하여, 황산 코발트 55 중량부, 질화붕소 37 중량부, 염화아연 25 중량부, 메타인산리튬 21 중량부, 석고 19 중량부, 칼슘설포알루미네이트 11 중량부, 크로라이트 7 중량부 및 칼슘 알루미노페라이트 9 중량부를 혼합한 것을 사용하였다.At this time, the crack reducing binder is based on 100 parts by weight of crude steel Portland cement, 55 parts by weight of cobalt sulfate, 37 parts by weight of boron nitride, 25 parts by weight of zinc chloride, 21 parts by weight of lithium metaphosphate, 19 parts by weight of gypsum, calcium sulfoaluminum A mixture of 11 parts by weight of nate, 7 parts by weight of chromite, and 9 parts by weight of calcium aluminoferite was used.

이때, 상기 질화붕소는 상기 실시예 2에서 사용된 다공성 질화붕소 100 중량부를; 2-하이드록시에틸 아크릴레이트 35 중량%, 다이에틸렌 글리콜 다이아크릴레이트 28 중량%, 퍼하이드로폴리실라잔 17 중량%, 테트라프로필 암모늄 하이드록사이드 12 중량% 및 도데실벤젠술폰산 8 중량%를 포함하는 표면 개질용액 150 중량부에 혼합하여, 120 Hz 세기로 1시간 동안 초음파 처리한 후, 3시간 동안 숙성시켜 표면을 개질시킨 것을 사용하였다.At this time, the boron nitride is 100 parts by weight of the porous boron nitride used in Example 2; Comprising 35% by weight of 2-hydroxyethyl acrylate, 28% by weight of diethylene glycol diacrylate, 17% by weight of perhydropolysilazane, 12% by weight of tetrapropyl ammonium hydroxide and 8% by weight of dodecylbenzenesulfonic acid It was mixed with 150 parts by weight of the surface modification solution, sonicated for 1 hour at an intensity of 120 Hz, and then aged for 3 hours to modify the surface.

또한, 상기 메타인산리튬은 비정질의 메타인산리튬(LiPO3) 및 결정질의 메타인산리튬을 1: 1 중량비율로 혼합한 것을 사용하였다. 이때, 수산화리튬(LiOH)을 인산에 pH 3.5로 용해시켜 인산리튬 수용액을 제조한 후, 상기 인산리튬 수용액을 약 500 ℃의 온도로 가열된 챔버에 열간분무(spray pyrolysis)함으로써 제조되는 것을 사용하였다. 또한, 상기 결정질의 메타인산리튬은 상기 비정질의 메타인산리튬을 400 ℃의 온도로 열처리함으로써 제조되는 것을 사용하였다.In addition, as the lithium metaphosphate, a mixture of amorphous lithium metaphosphate (LiPO 3 ) and crystalline lithium metaphosphate in a weight ratio of 1: 1 was used. At this time, lithium hydroxide (LiOH) was dissolved in phosphoric acid at pH 3.5 to prepare a lithium phosphate aqueous solution, and then the lithium phosphate aqueous solution was used by spray pyrolysis in a chamber heated to a temperature of about 500°C. . In addition, the crystalline lithium metaphosphate was prepared by heat-treating the amorphous lithium metaphosphate at a temperature of 400°C.

또한, 상기 성능개선 혼화제는 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 트리메톡시실릴프로필 (메트)아크릴레이트 88 중량부, 3-우레이도 프로필트리메톡시 실란 31 중량부, 6-옥소-2-피페리딘카르본산 27 중량부, (메트)아크릴로일옥시알킬 이소시아네이트 19 중량부, 프로필갈레이트 12 중량부, 아연디알킬디티오포스페이트 17 중량부, 몰리브덴 디티오카바메이트 17 중량부 및 티오아세트아미드 5 중량부를 혼합한 것을 사용하였다.In addition, the performance-improving admixture is, based on 100 parts by weight of trimethoxysilylethylstyrene, 88 parts by weight of trimethoxysilylpropyl (meth)acrylate, 31 parts by weight of 3-ureido propyltrimethoxy silane, and 6-oxo- 2-piperidinecarboxylic acid 27 parts by weight, (meth)acryloyloxyalkyl isocyanate 19 parts by weight, propyl gallate 12 parts by weight, zinc dialkyldithiophosphate 17 parts by weight, molybdenum dithiocarbamate 17 parts by weight and A mixture of 5 parts by weight of thioacetamide was used.

<비교예><Comparative Example>

본 발명에 따른 실시예 1 내지 실시예 3의 특성을 보다 용이하게 파악할 수 있도록 실시예들과 비교할 수 있는 비교예들을 제시한 것이다.Comparative examples that can be compared with the examples are presented so that the characteristics of Examples 1 to 3 according to the present invention can be more easily grasped.

<비교예 1><Comparative Example 1>

조강 포틀랜드 시멘트 33 중량%, 잔골재 32 중량%, 굵은골재 28 중량%를 강제식 믹서에 투입하여 교반한 후, 물 7 중량%을 더 혼합한 다음, 다시 2분간 교반함으로써 시멘트 콘크리트 조성물을 제조하였다.A cement concrete composition was prepared by adding 33% by weight of crude Portland cement, 32% by weight of fine aggregate, and 28% by weight of coarse aggregate to a forced mixer and stirring, further mixing 7% by weight of water, and then stirring for 2 minutes.

<비교예 2><Comparative Example 2>

조강 포틀랜드 시멘트 33 중량%, 잔골재 32 중량%, 굵은골재 28 중량%를 강제식 믹서에 투입하여 교반한 후, 물 3 중량% 및 트리메톡시실릴에틸스티렌 4 중량%를 더 혼합한 다음, 다시 2분간 교반함으로써 시멘트 콘크리트 조성물을 제조하였다.After adding 33% by weight of crude Portland cement, 32% by weight of fine aggregate, and 28% by weight of coarse aggregate to a forced mixer and stirring, 3% by weight of water and 4% by weight of trimethoxysilylethylstyrene were further mixed, and then 2 A cement concrete composition was prepared by stirring for a minute.

<비교예 3><Comparative Example 3>

조강 포틀랜드 시멘트 20 중량%, 칼슘설포알루미네이트 13 중량%, 잔골재 32 중량%, 굵은골재 28 중량%를 강제식 믹서에 투입하여 교반한 후, 물 3 중량%, 트리메톡시실릴에틸스티렌 2.1 중량% 및 트리메톡시실릴프로필 (메트)아크릴레이트 1.9 중량%를 더 혼합한 다음, 다시 2분간 교반함으로써 시멘트 콘크리트 조성물을 제조하였다.Crude Portland cement 20% by weight, calcium sulfoaluminate 13% by weight, fine aggregate 32% by weight, and coarse aggregate 28% by weight were added to a forced mixer and stirred, then 3% by weight of water, 2.1% by weight of trimethoxysilylethylstyrene And 1.9% by weight of trimethoxysilylpropyl (meth)acrylate were further mixed, and then stirred for 2 minutes to prepare a cement concrete composition.

<시험예><Test Example>

본 발명에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물의 특성을 보다 구체적으로 파악할 수 있도록 본 발명의 실시예 1 내지 3에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물 및 비교예 1 내지 3에 따른 시멘트 콘크리트 조성물의 특성을 평가하여 그 결과를 하기 표 1에 나타내었다.Crude steel cement concrete composition for road pavement repair excellent in crack resistance according to Examples 1 to 3 of the present invention and comparative examples so that the characteristics of the crude steel cement concrete composition for road pavement repair having excellent crack resistance according to the present invention can be more specifically identified. The properties of the cement concrete compositions according to 1 to 3 were evaluated, and the results are shown in Table 1 below.

시험항목Test Items 시험방법Test Methods 실시예 1Example 1 실시예 2Example 2 실시예 3Example 3 비교예 1Comparative Example 1 비교예 2Comparative Example 2 비교예 3Comparative Example 3 건조수축(길이변화율(%))Drying shrinkage (length change rate (%)) KS F 2424KS F 2424 0.0010.001 0.0010.001 0.0010.001 0.100.10 0.070.07 0.070.07 압축강도(MPa)_12시간Compressive strength (MPa)_12 hours KS F 2405KS F 2405 2626 2929 3030 1515 1717 1818 압축강도(MPa)_28일Compressive strength (MPa)_28 days KS F 2405KS F 2405 3737 4040 4242 2424 2727 2828 휨강도(MPa)_12시간Flexural strength (MPa)_12 hours KS F 2405KS F 2405 6.16.1 6.56.5 6.96.9 3.73.7 3.93.9 4.24.2 휨강도(MPa)_28일Flexural strength (MPa)_28 days KS F 2405KS F 2405 8.38.3 8.78.7 8.98.9 5.95.9 6.36.3 6.36.3 부착강도(MPa)_12시간Adhesion strength (MPa)_12 hours KS F 2762KS F 2762 2.22.2 2.52.5 2.72.7 1.11.1 1.41.4 1.71.7 부착강도(MPa)_28일Adhesion strength (MPa)_28 days KS F 2762KS F 2762 3.23.2 3.33.3 3.53.5 1.91.9 2.22.2 2.42.4 염분침투저항성(coulomb)Salt penetration resistance (coulomb) KS F 2711KS F 2711 478478 317317 308308 12081208 11571157 992992 동결융해저항성(%)Freeze-thaw resistance (%) KS F 2456KS F 2456 8888 9090 9292 6868 7272 7373 마모저항성(mm)Wear resistance (mm) ASTM C 779ASTM C 779 0.010.01 0.010.01 0.010.01 0.270.27 0.190.19 0.180.18 균열 저항성Crack resistance AASHTO PP34-98AASHTO PP34-98 균열없음No cracks 균열없음No cracks 균열없음No cracks 균열발생Cracking 균열없음No cracks 균열없음No cracks

상기 표 1에서 확인할 수 있는 바와 같이, 실시예 1 내지 3에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물은 비교예 1 내지 3에 따른 시멘트 콘크리트 조성물과 비교하여, 건조수축에 따른 길이변화율이 적은 것을 확인할 수 있었다. 또한, 실시예 1 내지 3에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물은 비교예 1 내지 3에 따른 시멘트 콘크리트 조성물과 비교하여, 우수한 압축강도, 휨강도 및 부착강도를 갖고; 우수한 염분침투저항성, 동결융해저항성 및 마모저항성을 갖는 것을 확인할 수 있었다.As can be seen in Table 1, the crude steel cement concrete composition for road pavement repair having excellent crack resistance according to Examples 1 to 3 was compared with the cement concrete composition according to Comparative Examples 1 to 3, and the rate of change in length according to drying shrinkage I was able to confirm this little thing. In addition, the crude steel cement concrete composition for road pavement repair having excellent crack resistance according to Examples 1 to 3 has excellent compressive strength, flexural strength and adhesion strength as compared to the cement concrete composition according to Comparative Examples 1 to 3; It was confirmed that it has excellent salt penetration resistance, freeze-thaw resistance, and abrasion resistance.

이상에서 설명한 바와 같이, 본 발명이 속하는 기술 분야의 당업자는 본 발명이 그 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예는 모두 예시적인 것이며 한정적인 것이 아닌 것으로서 이해해야만 한다. 본 발명의 범위는 상기 상세한 설명보다는 후술하는 특허청구범위의 의미 및 범위 그리고 그 등가개념으로부터 도출되는 모두 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.As described above, those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, all of the embodiments described above are illustrative and should be understood as non-limiting. The scope of the present invention should be construed as including all changed or modified forms derived from the meaning and scope of the claims to be described later rather than the above detailed description, and equivalent concepts thereof.

Claims (5)

균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물로서,
균열 저감형 결합재 10 내지 40 중량%, 잔골재 30 내지 50 중량%, 굵은골재 20 내지 40 중량%, 물 0.1 내지 10 중량% 및 성능개선 혼화제 0.1 내지 10 중량%를 포함하고;
상기 균열 저감형 결합재는 조강 포틀랜드 시멘트 100 중량부에 대하여, 황산 코발트 50 내지 70 중량부, 질화붕소 20 내지 40 중량부, 염화아연 20 내지 40 중량부, 메타인산리튬 10 내지 30 중량부, 석고 10 내지 30 중량부, 칼슘설포알루미네이트 10 내지 30 중량부, 크로라이트 1 내지 10 중량부 및 칼슘 알루미노페라이트 1 내지 10 중량부를 포함하고;
상기 메타인산리튬은 비정질의 메타인산리튬(LiPO3) 및 결정질의 메타인산리튬을 1: 1 내지 5 중량비율로 혼합한 것이고;
상기 비정질의 메타인산리튬(LiPO3)은 수산화리튬(LiOH)을 인산에 pH 4이하로 용해시켜 인산리튬 수용액을 제조하는 단계, 및 상기 인산리튬 수용액을 400 내지 500 ℃의 온도로 가열된 챔버에 열간분무(spray pyrolysis)함으로써 비정질의 메타인산리튬를 수득하는 단계를 포함하는 제조방법에 의하여 제조되는 것이고;
상기 결정질의 메타인산리튬은 상기 비정질의 메타인산리튬을 150 내지 450 ℃의 온도로 열처리하여 결정질의 메타인산리튬을 수득하는 단계를 포함하는 제조방법에 의하여 제조되는 것이고;
상기 성능개선 혼화제는 트리메톡시실릴에틸스티렌 100 중량부에 대하여, 트리메톡시실릴프로필 (메트)아크릴레이트 80 내지 100 중량부, 3-우레이도 프로필트리메톡시 실란 20 내지 40 중량부, 6-옥소-2-피페리딘카르본산 20 내지 40 중량부, (메트)아크릴로일옥시알킬 이소시아네이트 10 내지 30 중량부, 프로필갈레이트 10 내지 30 중량부, 아연디알킬디티오포스페이트 10 내지 30 중량부, 몰리브덴 디티오카바메이트 10 내지 30 중량부 및 티오아세트아미드 1 내지 10 중량부를 포함하는 것을 특징으로 하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물.
As a crude steel cement concrete composition for road pavement repair with excellent crack resistance,
10 to 40% by weight of a crack reducing binder, 30 to 50% by weight of fine aggregate, 20 to 40% by weight of coarse aggregate, 0.1 to 10% by weight of water, and 0.1 to 10% by weight of a performance-improving admixture;
The crack reducing binder is 50 to 70 parts by weight of cobalt sulfate, 20 to 40 parts by weight of boron nitride, 20 to 40 parts by weight of zinc chloride, 10 to 30 parts by weight of lithium metaphosphate, and 10 to 30 parts by weight of gypsum based on 100 parts by weight of crude steel Portland cement. To 30 parts by weight, 10 to 30 parts by weight of calcium sulfoaluminate, 1 to 10 parts by weight of chromite, and 1 to 10 parts by weight of calcium aluminoferite;
The lithium metaphosphate is a mixture of amorphous lithium metaphosphate (LiPO 3 ) and crystalline lithium metaphosphate in a weight ratio of 1: 1 to 5;
The amorphous lithium metaphosphate (LiPO 3 ) is prepared by dissolving lithium hydroxide (LiOH) in phosphoric acid at a pH of 4 or less to prepare a lithium phosphate aqueous solution, and the lithium phosphate aqueous solution in a chamber heated to a temperature of 400 to 500 °C. It is manufactured by a manufacturing method comprising the step of obtaining amorphous lithium metaphosphate by spray pyrolysis;
The crystalline lithium metaphosphate is produced by a manufacturing method including the step of heat-treating the amorphous lithium metaphosphate at a temperature of 150 to 450°C to obtain crystalline lithium metaphosphate;
The performance-improving admixture is trimethoxysilylpropyl (meth)acrylate 80 to 100 parts by weight, 3-ureido propyltrimethoxy silane 20 to 40 parts by weight, 6- 20 to 40 parts by weight of oxo-2-piperidinecarboxylic acid, 10 to 30 parts by weight of (meth)acryloyloxyalkyl isocyanate, 10 to 30 parts by weight of propyl gallate, 10 to 30 parts by weight of zinc dialkyldithiophosphate , Molybdenum dithiocarbamate 10 to 30 parts by weight and thioacetamide 1 to 10 parts by weight of the crude steel cement concrete composition for road pavement repair excellent in crack resistance, characterized in that it comprises.
 제1항에 있어서,
상기 질화붕소는 비표면적이 600 내지 1,000 m2/g인 다공성 질화붕소인 것이고;
상기 다공성 질화붕소는 TiB2 및 TiN을 B와 N의 몰비율이 1:1이 되도록 혼합하는 단계;
상기 혼합물을 고에너지 볼 밀을 이용하여, 물리적으로 분쇄하는 단계;
상기 분쇄된 혼합물을 300 내지 1,200 ℃의 온도에서 5분 내지 5시간 동안 가열하여 염소 기체(Cl2)와 같은 할로겐 기체와 반응시키는 단계; 및
수소 분위기 하에서 400 내지 600℃의 온도에서 10분 내지 2시간 동안 가열하는 단계를 포함하는 제조방법에 의하여 제조되는 것을 특징으로 하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물.
The method of claim 1,
The boron nitride is a porous boron nitride having a specific surface area of 600 to 1,000 m 2 /g;
The porous boron nitride is mixed with TiB 2 and TiN so that the molar ratio of B and N is 1:1;
Physically pulverizing the mixture using a high energy ball mill;
Heating the pulverized mixture at a temperature of 300 to 1,200° C. for 5 minutes to 5 hours to react with a halogen gas such as chlorine gas (Cl 2 ); And
A crude steel cement concrete composition for road pavement repair having excellent crack resistance, characterized in that produced by a manufacturing method comprising heating at a temperature of 400 to 600° C. for 10 minutes to 2 hours in a hydrogen atmosphere.
 제2항에 있어서,
상기 다공성 질화붕소는
상기 다공성 질화붕소 100 중량부에,
알코올성 하이드록실기를 갖는 불포화 단량체 60 내지 80 중량%, 퍼하이드로폴리실라잔 1 내지 20 중량%, 테트라(C1 내지 C4)알킬 암모늄 하이드록사이드 1 내지 20 중량% 및 도데실벤젠술폰산 1 내지 20 중량%를 포함하는 표면 개질용액 100 내지 300 중량부에 혼합하여, 초음파 처리한 후, 1 내지 7 시간 동안 숙성시켜 표면을 개질시키는 것을 특징으로 하는 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물.
The method of claim 2,
The porous boron nitride is
100 parts by weight of the porous boron nitride,
60 to 80% by weight of an unsaturated monomer having an alcoholic hydroxyl group, 1 to 20% by weight of perhydropolysilazane, 1 to 20% by weight of tetra(C1 to C4) alkyl ammonium hydroxide, and 1 to 20% by weight of dodecylbenzenesulfonic acid A crude steel cement concrete composition for repairing road pavement having excellent crack resistance, characterized in that the surface is modified by mixing 100 to 300 parts by weight of a surface modification solution containing %, sonicating, and aging for 1 to 7 hours.
 삭제delete 제1항 내지 제3항 중 어느 한 항에 따른 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 이용한 도로포장 보수공법으로서,
도로면을 파쇄기, 평삭기, 숏블라스터를 이용하여 절삭, 블라스팅하여 레이탄스 및 불순물을 제거하는 단계; 제거된 부위를 청소하는 단계; 청소된 부위에 살수하여 습윤상태를 유지하는 단계; 습윤상태 유지 후 높은 접착력 및 방수효과를 얻기 위하여 브루밍 또는 프라이머 처리하는 단계; 브루밍 또는 프라이머 처리한 상부에, 상기 균열 저항성이 우수한 도로포장 보수용 조강 시멘트 콘크리트 조성물을 타설하는 단계; 타설 후 상부의 수분 증발을 방지하여 초기 소성균열을 방지하기 위하여 양생제를 살포하는 단계; 양생제 살포 후 균열 유발 및 미끄럼 저항치를 높이기 위하여 타이닝하는 단계; 및 양생하는 단계를 포함하는 것을 특징으로 하는 도로포장 보수공법.
As a road pavement repair method using the crude steel cement concrete composition for road pavement repair having excellent crack resistance according to any one of claims 1 to 3,
Cutting and blasting the road surface using a crusher, a planer, and a shot blaster to remove latance and impurities; Cleaning the removed area; Sprinkling on the cleaned area to maintain a moist state; Blooming or primer treatment to obtain high adhesion and waterproof effect after maintaining the wet state; Pouring a crude steel cement concrete composition for repairing road pavements having excellent crack resistance on the top of the blooming or primer treatment; Spraying a curing agent to prevent initial plastic cracking by preventing evaporation of water at the top after pouring; A step of tinting in order to induce cracking and increase a sliding resistance value after applying the curing agent; And road pavement repair method comprising the step of curing.
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