KR102190565B1 - Sectional Recovery Composition - Google Patents
Sectional Recovery Composition Download PDFInfo
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- KR102190565B1 KR102190565B1 KR1020200002347A KR20200002347A KR102190565B1 KR 102190565 B1 KR102190565 B1 KR 102190565B1 KR 1020200002347 A KR1020200002347 A KR 1020200002347A KR 20200002347 A KR20200002347 A KR 20200002347A KR 102190565 B1 KR102190565 B1 KR 102190565B1
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- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
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Abstract
Description
본 발명은 초속경 시멘트와 라텍스를 이용한 단면복구용 조성물에 관한 것으로서, 보다 구체적으로 발포 라텍스와 초속경 시멘트를 함유함으로써 조기강도 가능하게 하고, 차량진동 영향이 감소하여 단시간에 복구 가능하고, 휨 강도가 우수한 초속경 시멘트와 라텍스를 이용한 단면복구용 조성물에 관한 것이다.The present invention relates to a composition for cross-section restoration using ultra-fast-diameter cement and latex, and more specifically, by containing foamed latex and ultra-fast-diameter cement, enables early strength, reduces vehicle vibration effects, and enables restoration in a short time, and flexural strength It relates to a composition for cross-section recovery using an excellent ultrafast cement and latex.
일반적으로 교량의 바닥판, 도로의 노면 및 건물의 외벽과 같이 부식이나 침식이 많이 일어나는 부위를 보수 또는 보강하기 위한 보수공사에는 보통 포틀랜드 내지 조강 포틀랜드 시멘트(3종 시멘트)가 널리 사용되고 있다.In general, Portland or crude Portland cement (
그리고 조강 포틀랜드 시멘트는 일반 시멘트에 비하여 시공성이 우수하다.And crude Portland cement has superior workability compared to general cement.
다만, 조강 포틀랜드 시멘트는 그 특성상 콘크리트가 경화되는 양생 시간(2∼3시간)이 오래 소요되기 때문에 작업의 특성상 짧은 시간 내에 마무리를 요하는 긴급 보수공사에 사용하기에는 더욱 곤란한 문제점을 내포하고 있다.However, since crude Portland cement takes a long curing time (2 to 3 hours) for the concrete to harden due to its nature, it is more difficult to use for emergency repair work that requires finishing within a short time due to the nature of the work.
따라서, 최근의 긴급 보수공사에서는 조강 포틀랜드 시멘트의 단점을 보완하기 위하여 콘크리트에 폴리머 에멀젼을 첨가한 폴리머 시멘트 콘크리트의 사용이 점차 증가하고 있다.Therefore, in recent emergency repair work, the use of polymer cement concrete in which a polymer emulsion is added to concrete is gradually increasing in order to compensate for the shortcomings of crude steel Portland cement.
그러나 기존 폴리머 시멘트 콘크리트는 고가의 폴리머 디스퍼젼(dispersion)을 사용함으로써 공사비의 상승 원인이 되는 문제점이 있었다.However, the existing polymer cement concrete has a problem that causes an increase in construction cost by using an expensive polymer dispersion.
또한 기존의 초속경 폴리머 시멘트 콘크리트는 그 재료 자체의 특징으로 인하여 초기 수분 증발이 빠르게 발생되므로 초기 플라스틱 균열, 건조 수축 및 수화열이 높아 균열이 발생하기 쉬운 문제점이 있었다.In addition, the existing ultra-fast-hardening polymer cement concrete has a problem that the initial plastic cracking, drying shrinkage, and heat of hydration are high because the initial moisture evaporation occurs rapidly due to the characteristics of the material itself.
본 발명은 상기한 바와 같은 종래 기술의 문제점을 해결하기 위한 것으로서,본 발명의 목적은 발포 라텍스와 초속경 시멘트를 함유함으로써 조기강도 가능하게 하고, 차량진동 영향이 감소하여 단시간에 복구 가능하고, 휨 강도가 우수한 단면복구용 조성물을 제공하는 것이다.The present invention is to solve the problems of the prior art as described above, and an object of the present invention is to enable early strength by containing foamed latex and ultra-fast cement, and to recover in a short time by reducing the effect of vehicle vibration, and to bend It is to provide a composition for cross-section recovery excellent in strength.
본 발명의 해결하고자 하는 과제는 이상에서 언급된 것들에 한정되지 않으며, 언급되지 아니한 다른 해결과제들은 아래의 기재로부터 당업자에게 명확하게 이해되어 질 수 있을 것이다.The problem to be solved of the present invention is not limited to those mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.
상기 목적을 달성하기 위한 본 발명에 따른 단면복구용 조성물은 초속경 시멘트와, 모래 또는 규사 중 적어도 어느 하나의 잔골재와, 라텍스와, 물을 포함하되, 상기 초속경 시멘트 100중량부 대비 상기 라텍스는 10~30중량부인 것을 특징으로 한다.The composition for cross-section restoration according to the present invention for achieving the above object comprises ultra-fast-diameter cement, at least one fine aggregate of sand or silica sand, latex, and water, and the latex compared to 100 parts by weight of the ultra-fast-diameter cement It is characterized in that 10 to 30 parts by weight.
또한, 본 발명에 따른 단면복구용 조성물에 있어서, 초속경 시멘트는 블레인 분말도가 5,000~5,500㎠/g 범위인 미립 시멘트 100중량부, 칼슘 알루미네이트 100중량부, 칼슘 알루미나 시멘트 50중량부, 석고 40중량부, 메틸 셀룰로오스 25중량부, 알킬암모늄염 15중량부, 디메틸 아닐린 15중량부, 칼슘포메이트 10중량부, 시트릭산 10중량부, 아세트산 10중량부, 아크릴산노말부틸에스테르 10중량부, 페닐트리메톡시실란 3중량부 및 폴리카본산계 감수제 2중량부를 혼합한 것을 특징으로 한다.In addition, in the composition for cross-section restoration according to the present invention, the ultrafast cement is 100 parts by weight of fine cement having a blast powder of 5,000 to 5,500 ㎠/g, 100 parts by weight of calcium aluminate, 50 parts by weight of calcium alumina cement, and gypsum. 40 parts by weight, methyl cellulose 25 parts by weight,
또한, 본 발명에 따른 단면복구용 조성물에 있어서, 첨가제를 더 포함하며, 상기 첨가제는 폴리비닐아세테이트 5중량부, 2-히드록시 에틸메타크릴레이트 3중량부와, 에틸렌-아크릴산 공중합체 2중량부와, 재료분리 방지제 0.5중량부, 소포제 0.5중량부, 유동화제 0.5중량부 및 안정화제 0.5중량부를 혼합한 것을 특징으로 한다.In addition, in the composition for repairing a section according to the present invention, further comprising an additive, wherein the additive is 5 parts by weight of polyvinyl acetate, 3 parts by weight of 2-hydroxy ethyl methacrylate, and 2 parts by weight of an ethylene-acrylic acid copolymer And, 0.5 parts by weight of a material separation inhibitor, 0.5 parts by weight of an antifoaming agent, 0.5 parts by weight of a fluidizing agent, and 0.5 parts by weight of a stabilizer are mixed.
본 발명에 따른 단면복구용 조성물에 의하면, 발포 라텍스와 초속경 시멘트를 함유함으로써 조기강도 가능하게 하고, 차량진동 영향이 감소하여 단시간에 복구 가능하고, 휨 강도가 우수한 효과가 있다.According to the composition for cross-section restoration according to the present invention, by containing foamed latex and ultra-fast-diameter cement, early strength is possible, the effect of vehicle vibration is reduced, and recovery is possible in a short time, and the flexural strength is excellent.
본 발명의 효과는 이상에서 언급된 것들에 한정되지 않으며, 언급되지 아니한 다른 효과들은 아래의 기재로부터 당업자에게 명확하게 이해되어 질 수 있을 것이다.The effects of the present invention are not limited to those mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the following description.
도 1 내지 도 6은 시험예 1의 파괴양상 결과를 나타낸 것이다.
도 7은 시험예 2의 하중-변위 결과를 나타낸 것이다.
도 8은 시험예 3의 연성능력 및 에너지소산능력 결과를 나타낸 것이다.
도 9는 단면복구가 필요한 손상된 콘크리트를 나타내는 사진들이다.1 to 6 show the results of the failure mode of Test Example 1.
7 shows the load-displacement results of Test Example 2.
8 shows the results of the ductility ability and energy dissipation ability of Test Example 3.
9 are photographs showing damaged concrete requiring cross-section recovery.
이하 본 발명의 바람직한 실시예에 대하여 구체적으로 설명한다.Hereinafter, a preferred embodiment of the present invention will be described in detail.
본 발명을 설명함에 있어서, 관련된 공지기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명은 생략한다. 또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 판례 등에 따라 달라질 수 있다. 그러므로 그 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or precedents of users or operators. Therefore, the definition should be made based on the contents throughout this specification.
[실시예][Example]
본 발명에 따른 단면 복구 조성물은 아래 표 1에 나타난 바와 같이, 초속경 시멘트와, 잔골재와, 라텍스와, 물로 구성된다.As shown in Table 1 below, the cross-sectional repair composition according to the present invention is composed of ultra-fast-diameter cement, fine aggregate, latex, and water.
시멘트Initial speed
cement
라텍스Liquid type
Latex
우레아additive
Urea
DL-10(0.0)Example 1
DL-10(0.0)
DL-12.5(0.3)Example 2
DL-12.5(0.3)
DL-12.5(0.7)Example 3
DL-12.5(0.7)
DL-15(1.0)Example 4
DL-15(1.0)
위 표 1에서 단위는 [kg/㎥]이며, 초속경 시멘트와 첨가재의 조성비는 아래와 같다.In Table 1 above, the unit is [kg/㎥], and the composition ratio of ultra-fast cement and additives is as follows.
[초속경 시멘트 조성비][Constituent ratio of cement with initial speed]
초속경 시멘트는 블레인 분말도가 5,000~5,500㎠/g 범위인 미립 시멘트 100중량부, 칼슘 알루미네이트 100중량부, 칼슘 알루미나 시멘트 50중량부, 석고 40중량부, 메틸 셀룰로오스 25중량부, 알킬암모늄염 15중량부, 디메틸 아닐린 15중량부, 칼슘포메이트 10중량부, 시트릭산 10중량부, 아세트산 10중량부, 아크릴산노말부틸에스테르 10중량부, 페닐트리메톡시실란 3중량부 및 폴리카본산계 감수제 2중량부를 혼합하여 사용하였다.Ultra-fast-hard cement is 100 parts by weight of fine-grained cement in the range of 5,000 to 5,500 ㎠/g, 100 parts by weight of calcium aluminate, 50 parts by weight of calcium alumina cement, 40 parts by weight of gypsum, 25 parts by weight of methyl cellulose, 15 parts by weight of alkyl ammonium salt Parts by weight, 15 parts by weight of dimethyl aniline, 10 parts by weight of calcium formate, 10 parts by weight of citric acid, 10 parts by weight of acetic acid, 10 parts by weight of acrylic acid normal butyl ester, 3 parts by weight of phenyltrimethoxysilane and 2 parts by weight of a polycarboxylic acid water reducing agent The parts were mixed and used.
[첨가제 조성비][Additive composition ratio]
첨가제는 폴리비닐아세테이트 5중량부, 2-히드록시 에틸메타크릴레이트 3중량부와, 에틸렌-아크릴산 공중합체 2중량부와, 재료분리 방지제 0.5중량부, 소포제 0.5중량부, 유동화제 0.5중량부 및 안정화제 0.5중량부를 혼합하여 사용하였다.The additives include polyvinyl acetate 5 parts by weight, 2-
그리고 액상의 라텍스는 천연고무 원액의 라텍스, 또는 니트릴계 고무와 같은 합성 라텍스 모두 사용할 수 있으며, 발포제로서 니트로소(nitroso)계 발포제, 아조(azo)계 발포제 및 설포닐 하이드라지드(sulfonyl hydrazide)계 발포제로 이루어진 군으로부터 선택된 1종 이상의 발포제를 포함할 수 있다.In addition, liquid latex can be used as either a natural rubber undiluted latex or a synthetic latex such as nitrile-based rubber. As a foaming agent, a nitroso-based foaming agent, azo-based foaming agent, and sulfonyl hydrazide It may include one or more foaming agents selected from the group consisting of foaming agents.
[비교예 1][Comparative Example 1]
보통 포틀랜드 시멘트와, 규사와, 물을 배합하여 압축강도 30±3MPa인 콘크리트를 사용하였다.Usually, Portland cement, silica sand, and water were mixed to use concrete with a compressive strength of 30±3 MPa.
[[ 시험예Test example 1] 단면복구공법 휨성능 파괴양상결과 1] Sectional recovery method flexural performance failure pattern result
도 1 내지 도 6에 나타난 바와 같이, 모든 휨 성능 실험체에서 사인장응력에 의한 전단균열이 성장하면서 전단철근을 배근하지 않은 콘크리트 구조물의 전형적인 전단파괴가 발생하였다. 다만, 실시예 1 내지 4의 단면복구재는 구조물이 극한하중에 도달해도 박락, 탈락, 파손 등의 단면손실은 발생하지 않아, 초속경 시멘트와, Latex의 배합비에 의해 인장강도와 부착성능이 증가하는 것으로 판단된다.As shown in FIGS. 1 to 6, shear cracks due to sinusoidal stress were grown in all flexural performance specimens, resulting in typical shear failure of concrete structures without shear reinforcement. However, in the section restoration materials of Examples 1 to 4, even if the structure reaches the ultimate load, there is no cross-sectional loss such as peeling, dropping, or breakage, so that the tensile strength and adhesion performance are increased by the mixing ratio of the ultrafast cement and the latex. It is judged to be.
[[ 시험예Test example 2] 단면복구공법 휨성능의 하중-변위 2] Load-displacement of bending performance of section recovery method
슬래브 형태의 구조물이 피복손상을 받을 경우 본 발명의 실시예 1 내지 4의 휨 성능은 도 7에 나타난 바와 같이 평균 -70% 감소하였으며, 단면복구시 피복손상을 받지않은 실험체 기준으로 50%, 피복손상을 받은 실험체 기준 60% 휨 성능이 복원되는 것으로 나타났다.When the slab-shaped structure is damaged by coating, the bending performance of Examples 1 to 4 of the present invention decreased by -70% on average as shown in Fig.7, and 50% based on the specimen that did not suffer coating damage during cross-section restoration. It was found that the 60% flexural performance of the damaged specimen was restored.
[[ 시험예Test example 3] 단면복구공법 휨성능의 연성능력 및 에너지소산능력 3] Sectional recovery method, ductility and energy dissipation of bending performance
피복손상 및 단면복구 실험체에 대해 0.2% Offset 방법을 이용하여 항복점을 결정해 분석한 결과, 본 발명의 실시예 1 내지 4의 단면복구시 도 8 및 표 2에 나타난 바와 같이, 연성은 -6.2% 감소하였으며, 에너지소산능력은 -6.3% 감소하여 단면복구 시 취성의 성질이 복원되는 것으로 분석되었다. 한편, 극한 에너지축척량은 65% 증가하여 하중-변위곡선에서 단면복구시 피복손상 실험체 기준 60%와 근사한 것으로 나타났다. 따라서 피복손상을 단면복구 할 때 약 60% 수준 복원되는 것으로 판단된다.As a result of determining and analyzing the yield point using the 0.2% Offset method for the cover damage and section recovery test specimens, as shown in Figs. 8 and 2 at the time of section recovery of Examples 1 to 4 of the present invention, the ductility is -6.2%. It was analyzed that the energy dissipation capacity decreased by -6.3%, and the brittle property was restored when the cross-section was restored. On the other hand, the ultimate energy accumulation amount increased by 65%, and it was found that the load-displacement curve was close to 60% of the specimen damaged when the section was restored. Therefore, it is estimated that when the cover damage is restored to the cross section, it will be restored to about 60%.
[시험예 결과][Test Example Results]
콘크리트 구조물이 피복부(50mm) 손상을 받을 경우 휨 성능은 평균 245kN에서 73.5kN까지 낮아져 70% 감소하는 것으로 측정되었다. 피복 손상을 단면복구할 시 휨 성능은 평균 73,kN에서 118.25kN까지 증가해 피복 미손상 실험체 기준 50% 정도, 피복 손상 실험체 기준 60%까지 휨 성능이 증가 복원되었으며, 파괴양상을 고려하면 Latex가 함유된 단면복구재는 구조물이 극한하중까지 도달해도 단면손실, 탈락 등은 발생하지 않아 배합 시 발포성 Latex가 함유되면 구조적 성능증가를 기대할 수 있는 것으로 판단된다.When the concrete structure is damaged by the cladding (50mm), the flexural performance decreased from 245kN to 73.5kN on average, resulting in a 70% decrease. When recovering the section of the cladding damage, the flexural performance increased from 73,kN to 118.25kN on average, increasing the flexural performance by 50% based on the undamaged test specimen and 60% based on the damaged specimen. It is believed that the structural performance increase can be expected if the foamable Latex is contained in the contained section restoration material, as there is no section loss or dropout even when the structure reaches the ultimate load.
이상에서 설명된 본 발명은 예시적인 것에 불과하며, 본 발명이 속한 기술분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 잘 알 수 있을 것이다. 그러므로 본 발명은 상기의 상세한 설명에서 언급되는 형태로만 한정되는 것은 아님을 잘 이해할 수 있을 것이다. 따라서 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의해 정해져야 할 것이다. 또한, 본 발명은 첨부된 청구범위에 의해 정의되는 본 발명의 정신과 그 범위 내에 있는 모든 변형물과 균등물 및 대체물을 포함하는 것으로 이해되어야 한다.The present invention described above is merely exemplary, and those of ordinary skill in the art to which the present invention pertains will appreciate that various modifications and other equivalent embodiments are possible. Therefore, it will be appreciated that the present invention is not limited to the form mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. In addition, the present invention is to be understood as including the spirit of the present invention as defined by the appended claims and all modifications, equivalents and substitutes within the scope thereof.
Claims (3)
상기 초속경 시멘트 100중량부 대비 상기 라텍스는 10~30중량부이며,
상기 초속경 시멘트는 블레인 분말도가 5,000~5,500㎠/g 범위인 미립 시멘트 100중량부, 칼슘 알루미네이트 100중량부, 칼슘 알루미나 시멘트 50중량부, 석고 40중량부, 메틸 셀룰로오스 25중량부, 알킬암모늄염 15중량부, 디메틸 아닐린 15중량부, 칼슘포메이트 10중량부, 시트릭산 10중량부, 아세트산 10중량부, 아크릴산노말부틸에스테르 10중량부, 페닐트리메톡시실란 3중량부 및 폴리카본산계 감수제 2중량부를 혼합한 것을 특징으로 하는 초속경 시멘트와 라텍스를 이용한 단면복구용 조성물.
Including ultra-fast-hardening cement, at least one fine aggregate of sand or silica sand, latex, and water,
The latex is 10 to 30 parts by weight relative to 100 parts by weight of the ultrafast cement,
The ultrafast cement is 100 parts by weight of fine-grained cement having a blast powder of 5,000 to 5,500 ㎠/g, 100 parts by weight of calcium aluminate, 50 parts by weight of calcium alumina cement, 40 parts by weight of gypsum, 25 parts by weight of methyl cellulose, alkyl ammonium salt 15 parts by weight, 15 parts by weight of dimethyl aniline, 10 parts by weight of calcium formate, 10 parts by weight of citric acid, 10 parts by weight of acetic acid, 10 parts by weight of acrylic acid normal butyl ester, 3 parts by weight of phenyltrimethoxysilane and polycarboxylic acid-based water reducing agent 2 A composition for cross-section recovery using ultrafast cement and latex, characterized in that a mixture of parts by weight.
첨가제를 더 포함하며,
상기 첨가제는 폴리비닐아세테이트 5중량부, 2-히드록시 에틸메타크릴레이트 3중량부와, 에틸렌-아크릴산 공중합체 2중량부와, 재료분리 방지제 0.5중량부, 소포제 0.5중량부, 유동화제 0.5중량부 및 안정화제 0.5중량부를 혼합한 것을 특징으로 하는 초속경 시멘트와 라텍스를 이용한 단면복구용 조성물.The method of claim 1,
It further contains an additive,
The additives are polyvinyl acetate 5 parts by weight, 2-hydroxy ethyl methacrylate 3 parts by weight, ethylene-acrylic acid copolymer 2 parts by weight, material separation inhibitor 0.5 parts by weight, antifoaming agent 0.5 parts by weight, fluidizing agent 0.5 parts by weight And 0.5 parts by weight of a stabilizer are mixed.
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