• Computers and Concrete
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• 제5권2호
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• pp.89-100
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• 2008

This research examines the engineering properties and color intensities of mortar containing different amounts of fly ash (0, 5, 10 and 20%) mixed at different water-to-binder ratios (w/b = 0.23, 0.47 and 0.59) and exposed at different temperatures (T = 25, 100, 200, 400, 600 and $800^{\circ}C$). Results show that there is greater mass loss on ignition with high w/b and higher temperatures. In addition, the color channel image analyzer (Windows software written in Delphi) is utilized to study the relationship between the curing temperature and intensity of three primary colors, red, green and blue (RGB), of the fly ash mortar specimens. The results show that the RGB intensities on the specimen surface increases from that at $25^{\circ}C$. The mortar specimen becomes white with increase in w/b but without the addition of fly ash. Moreover, for mortar specimens with greater content of fly ash, red on the specimen surface has the greatest increase in intensity at elevated temperature. Observation the variations in color on the specimen surface may help estimate the highest elevated temperatures that concrete structures can withstand.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 춘계 학술논문 발표대회
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• pp.94-95
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• 2015

In this research is an examined the fundamental characteristics of color quantization of color mortar in according to the liquid carbon black. If the mortar mixed with liquid carbon black, and is excellent in color developing property as compared to existing powdered black pigment, compressive strength was excellent value in the range of less than 1%.

• 자원리싸이클링
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• 제19권6호
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• pp.86-92
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• 2010

본 연구는 생산원가 절감은 물론 에너지절감 및 환경보존을 목적으로 산업부산물인 고로슬래그 미분말을 컬러콘크리트의 활용방안으로 모색하고자 색상발현에 어려움이 있는 블랙색상을 선택하여 고로슬래그 미분말의 혼입률에 따른 기초 물성 및 색상발현정도 등을 확인하였다. 산업부산물인 고로슬래그 미분말을 활용한 컬러모르타르는 안료의 혼입시 유동성이 떨어지는 경향을 나타내었으나 입자표면이 산성피막에 의해 치밀하고 매끈하며 잠재수경성의 특성을 가진 고로슬래그 미분말의 혼업률에 비례하여 유동성이 증가하였다. 또한 일반 백색시멘트를 활용한 컬러모르타르보다 초기강도는 낮았으나 혼입시 우수한 장기강도 발현성을 나타내었다. 특히 현재 컬러콘크리트 시공시 색상발현에 가장 적합한 백색시멘트와 비교하여 동동하거나 그 이상의 색상발현성을 나타내었으며 명도 값 -30이하의 우수한 검정색상 발현이 가능하였다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2009년도 춘계 학술논문 발표대회 학계
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• pp.101-106
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• 2009

We study on the segregation reduction effect of Self-Leveling Color Mortar by using variable composition set of plasticizer and thickener, Naphthalene, melamine and polycarbonate-based dispersants were employed as plasticizers for examining on fluidity of mortar mixtures. For enhancement of mortar stability without loss of it's fluidity, two types of thickener were used such as polysaccharide(PS) and hydroxyethylcellulose(HEC). As a result, the most effective mortar was composed by feeding 0.519% of polycarbonate-based dispersant with 0.002587% of PS and 0.155844% of HEC on amount of basic mortar.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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• pp.733-736
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• 2006

In the many kind of construct-material, the concrete which has the high-strength and a durability is sufficient to use with structure-material. But the color of concrete is very monotony so generally concrete isn't used the out surface. although color concrete is a method of expressing surface, the combination of pigment and cement cause many Physical problem such as efflorescence phenomenon, strength degradation and so on. In this study, It attempt to develop the black mortar using the industrial by-product and to evaluate basic physical properties compare with general color concrete to solve the color concrete problem. The result of experiment showed that Black NSC which was made by-product has more visible black color than any mortar.

• International Journal of Concrete Structures and Materials
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• 제7권2호
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• pp.111-117
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• 2013

Heavy oil fly ash (HOFA) is a byproduct generated by the burning of heavy fuel oil. Chemical analysis showed that HOFA is mainly composed of unburned carbon with a significant amount of heavy metals. Due to toxicity, management of this waste poses a challenge to the industry personal. The present study investigates the possible use of HOFA as a black pigment or admixture in cement mortar aiming to produce ornamental brick. In order to investigate the change of cement mortar strength when HOFA is added, the standard compressive strength test with 50 mm cubes was performed. The results showed that the addition of 2-5 % of HOFA in cement mortar does not affect its strength. The leaching behavior of trace elements within HOFA and HOFA mixed mortar were investigated through laboratory batch leaching experiments. The results confirmed that HOFA can be utilized as a black pigment in ornamental brick, which is environmentally safe and provides good balance between color and brick properties.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.190-191
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• 2013

In this research, the fundamental experiment for colour concrete(by using pigment) has been invested. Fundamental properties and dyeability for the colour mortar as the changing replacement ratio of pigment has been tested. For the conclusion, with the increasing ratio of pigment, the flow and compressive strength for the mortar has been decreased, For the dyeability, there's little difference when replacement ratio of dyestuff changed when the colour is red and yellow, but large difference when the blue pigment was used. Consider about the workability and strength of the mortar, the optimum pigment's replacement ratio is fixed as 2.5%.

• Computers and Concrete
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• 제8권5호
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• pp.491-510
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• 2011

Before deciding if structures exposed to high temperature are to be repaired or demolished, their final state should be carefully examined. Destructive and non-destructive testing methods are generally applied for this purpose. Compressive strength and color change in mortars are observed as a result of the effects of high temperature. In this study, ordinary and pozzolan-added mortar samples were produced using different aggregates, and exposed to 100, 200, 300, 600, 900 and $1200^{\circ}C$. The samples were divided into two groups and cooled to room temperature in water and air separately. Compression tests were carried out on these samples, and the color change was evaluated by the Munsell Color System. The relationships between the change in compressive strength and color of mortars were determined by using a multi-layered feed-forward Neural Network model trained with the back-propagation algorithm. The results showed that providing accurate estimates of compressive strength by using the color components and ultrasonic pulse velocity design parameters were possible using the approach adopted in this study.

• 한국건설순환자원학회논문집
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• 제6권2호
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• pp.146-152
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• 2018

건설분야에서는 구조적 안정성과 더불어 생활수준과 의식수준의 향상으로 미관에 대한 새로운 요구가 증대되고 있다. 한편 보크사이트로(Bauxite)부터 수산화알루미늄 추출공정에서 발생되는 레드머드 슬러지는 $Fe_2O_3$를 약 20% 함유하고 있어 자연스런 천연 황토색을 나타내며 건설산업분야에 활용 가능성이 높다. 본 논문에서는 산업부산물인 함수율 50%의 레드머드 슬러지를 액상으로 제조하여, 제조된 액상화 레드머드를 시멘트 모르타르에 첨가하여 액상화 레드머드의 첨가량에 따른 시멘트 모르타르의 강도 및 색차를 검토하였다. 그 결과 액상화 레드머드 첨가량이 증가할수록 압축강도는 증가하였으며 액상화 레드머드를 첨가한 시멘트 모르타르는의 색채는 모든 시험체에서 YR계열의 범위에 분포하는 것으로 나타나며 액상화 레드머드 첨가량이 증가할수록 색채는 뚜렷해지는 경향을 나타내었다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2009년도 춘계 학술대회 제21권1호
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• pp.377-378
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• 2009

본 연구는 산업부산물인 황산철을 이용하여 컬러 모르터의 기초적인 물성을 평가하고자 하였다. 먼저, 굳지않은 모르터의 특성으로 황산철을 첨가할수록 플로우, 공기량 및 단위용적절량은 감소하는 것으로 나타났고, 압축강도는 황산철 6%치환에서 가장 증가한 것으로 나타났다.