• Wind and Structures
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• v.16 no.4
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• pp.301-322
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• 2013

Recent major post-hurricane damage assessments in the United States have reported that the most common damages result from the loss of building roof coverings and subsequent wind driven rain intrusion. In an effort to look further into this problem, this paper presents a full-scale (Wall of Wind --WoW--) investigation of external and underneath wind pressures on roof tiles installed on a low-rise building model with various gable roofs. The optimal dimensions for the low-rise building that was tested with the WOW are 2.74 m (9 ft) long, 2.13 m (7 ft) wide, and 2.13 m (7 ft) high. The building is tested with interchangeable gable roofs at three different slopes (2:12; 5:12 and 7:12). The field tiles of these gable roofs are considered with three different tile profiles namely high (HP), medium (MP), and low profiles (LP) in accordance with Florida practice. For the ridge, two different types namely rounded and three-sided tiles were considered. The effect of weather block on the "underneath" pressure that develops between the tiles and the roof deck was also examined. These tests revealed the following: high pressure coefficients for the ridge tile compared to the field tiles, including those located at the corners; considerably higher pressure on the gable end ridge tiles compared to ridge tiles at the middle of the ridge line; and marginally higher pressure on barrel type tiles compared to the three-sided ridge tiles. The weather blocking of clay tiles, while useful in preventing water intrusion, it doesn't have significant effect on the wind loads of the field tiles. The case with weather blocking produces positive mean underneath pressure on the field tiles on the windward side thus reducing the net pressures on the windward surface of the roof. On the leeward side, reductions in net pressure to a non-significant level were observed due to the opposite direction of the internal and external pressures. The effect of the weather blocking on the external pressure on the ridge tile was negligible.

• Economic and Environmental Geology
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• v.54 no.6
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• pp.671-687
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• 2021

This study investigated the firing temperature and thermal deformation process of roof tiles excavated from the connected stone-mound tomb in Seokchon-dong, Seoul, based on mineralogical and physical properties. A large number of roof tiles were excavated from the tomb site and some roof tiles were deformed by heat and were fired in uneven conditions. The colors of original roof tiles and their cores are mostly yellowish-brown, with high water absorption over 12%, containing fine-grained textures and some minerals such as quartz, feldspars, amphibole, and mica. It is estimated that the original roof tiles were fired below 900℃ in oxidation condition, showing loose matrices and mica layers by scanning electron microscopy. However, deformed roof tiles have the uneven surface color of reddish-brown and bluish-gray, and those cross-sections have sandwich structures in which dense reddish-brown surface and porous grey core coexist. They contained mullite and hercynite, so it was estimated to have been fired over 1,000℃, with 0.81~11% water absorption. In some samples, bloating pores by overfiring were observed, which means that they were fired at more than 1,200℃. In addition, the refirng experiments that the original roof tile was fired between 800℃ and 1,200℃ were carried out to investigate the physical and mineralogical properties of roof tiles compared to deformed ones. As a result, the water absorption decreased rapidly and the mineral phase started to change over 1,000℃. As the temperature gradually rises, the matrices are partially melted and recrystallized, resulting in similar thermal characteristics of deformed roof tiles. Therefore, the roof tiles from ancient tombs in Seokchon-dong seem to experience the secondary high temperature of 1,000 to 1,200℃ under uneven firing conditions, resulting in deformation characteristics such as shape transformation and mineral phase transition. It is considered to have been related to cremation rituals at the tombs of Seockchon-dong during the Baekje period.

• Korean Journal of Heritage: History & Science
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• v.38
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• pp.157-178
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• 2005

In this thesis, ammaksae, or internal roof tiles, which was reported to be in the period of Baekje, was examined on the basis of layers of archaeological excavation and styles of relics. As a result, among the relics which have already been reported, jidumun amkiwa (concave roof tiles patterned by finger tips) excavated from Pungnap Earthen Wall and yudansik amkiwa (stepped concave roof tiles) from remains such as Guari Baekje Remains, could not be seen yet. The only relics that could be identified as original-style ammaksae or ammaksae were jidumun amkiwa unearthed from the site of Gunsurisa Temple, togiguyeon amkiwa (mouth-rim earthenware concave roof tiles) and yuaksik amkiwa (concave roof tiles with sills) from Buso Fortress and Gwanbukri Baekje Remains, and gwimyeonindongdangchomun ammaksae (honeysuckle-pattern concave end roof tiles with monster design) from the sites of Jeseok Temple and Mireuk Temple. Regarding ammaksae in the period of Baekje like the above, it is considered that jidumun amkiwa (short sills appeared), which showed up in the period of China's North Dynasties, developed into togiguyeon amkiwa and yuaksik amkiwa (sills were formed), and then gwimyeonindongdangchomun ammaksae (patterns appeared) emerged.

• Journal of the Korean Geophysical Society
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• v.4 no.2
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• pp.87-93
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• 2001

The roof tiles excavated from the mountain fortress at Namsan-ri Seocheon-gun in Chungnam province were dated by using SAR protocol, Sample preparation was done with the quartz exclusion method. The paleodoses from 6 kinds of roof tiles were obtained from OSL measurements and the does rates of the soil around the excavated roof tiles and the tile themselves were measured from ICP/MS and ICP/AES with the conversion table. From the evaluated paleodose and the dose rate, the age of the roof tiles were determined to be from(733 ± 50)AD to (1160 ± 50)AD and the error was less than 10%.

• KOMUNHWA
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• no.57
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• pp.113-127
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• 2001

This paper introduces the reverse 'L' shaped roof-tiles discovered in Kyongju and tries to date them on the basis of the manufacturing technology of roof-tiles and associated various kinds of roof-tiles. Furthermore, I examined the characteristics of the

• 한국문화재보존과학회:학술대회논문집
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• 2002.11a
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• pp.7-14
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• 2002

In Katap-ri, South Korea, potteries and roof tiles are excavated with the assumed raw materials. Using NAA, the provenance of these cultural remains was examined among the neighboring others, and the correlation the assumed raw materials with potteries and roof tiles also was examined. From the results of statistics it is concluded that this cultural site is distingushed from others by several trace elements, Ba, Cr, Sc, Yb, Eu, and Rb with 93.2 % accuracy. Also it turned out that the assumed raw materials wasn't raleted to potteries and roof tiles with 96.3% accuracy.

• Archives of design research
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• v.14 no.4
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• pp.87-98
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• 2001

In the Chosun Dynasty (1392-1910), the walls and chimneys of palaces, temples, and the houses of the upper-class show various characteristics of decorative design patterns. This study investigated ceramic bricks and roof tiles, which is one aspect of environmental design studies. This study aimed to provide a typology ot traditional Korean design of bricks and roof tiles used in walls and chimneys, and to show the design characteristics. This study collected 685 designs of bricks and roof tiles, and divided them into 18 categories and 5 types of design patterns based on object figures, architectural styles, materials, and decorative methods. In conclusion, there were differences and similarities among the design patterns. In general, the palaces mostly used red, gray, and black bricks that had more detailed designs presenting auspicious signs or exorcism. But, temples and the houses usually used (black) roof tiles horizontally configured with the edges overlapping to decorate as wall as to strengthen their structure.

• Design & Manufacturing
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• v.17 no.2
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• pp.1-8
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• 2023

This study aims to enhance the price and quality competitiveness of imported tiles by developing a robotic tile production automation line. The development process involved several steps, such as requirement analysis, derivation of technical specifications, conceptual design, engineering feasibility review, detailed design, and production. Emphasis was placed on the transfer process of the tiles' molds, and technological advancements were achieved through engineering interpretation, feasibility review, and performance evaluation. The developed automation system incorporates key specifications to ensure a transfer success rate of over 90%, thereby ensuring stable transportation of the tiles and minimizing defect rates during production. The maximum weight capacity for tile pick-up was set above 6 kg, allowing effective handling of tiles weighing 6 kg or less in automated tasks. Furthermore, the system enables safe and precise movement of the tiles to the desired location, with a transfer distance of at least 1.3 m and a transfer speed exceeding 0.2 m/sec, thereby increasing production efficiency.

• Journal of Conservation Science
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• v.36 no.5
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• pp.315-325
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• 2020

The Daetongsa temple is the earliest temple to be constructed during the era of the Three Kingdoms in ancient Korea. The main architect, purpose, and name of the temple have been confirmed through ancient literature and archeological materials carved in the Chinese letter, Daetong, excavated around Gongju. However, the location and range of the temple have remained elusive and were discussed in various studies. In this study, we examine the roof tiles obtained from the presumed site of the Daetongsa temple. The tiles were found to contain traces of red paint (red pigments) on their surface and analyzed using nondestructive techniques. The results imply that roof tiles were made using clay tablets and wooden cylinders, with latticed cloth in between. Additionally, some wooden cylinders appeared to comprise numerous wooden plates tied together by strings. The clay tablets used to make the roof tiles were produced from the source clay via the sorting process. The traces of red paint on the surface of the roof tiles were verified to be traditional pigments used for painting wooden buildings. These pigments were extracted from red ocher or red clay (Seokganju), mainly consisting of iron oxide. In the literature, the location of provenance sites for Seokganju is estimated to be far from Gongju. However, the materials for extracting the red pigments were relatively easy to source because most rocks comprised iron oxides. Therefore, it is necessary to discuss the provenance of the red pigments around the presumed site of Daetongsa.

• Conservation Science in Museum
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• v.4
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• pp.47-55
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• 2003

Among many artifacts donated by Yoo Chang-jong, we duplicated and performed conservation treatment for a colored brick(J3432), a roof tile with monster-mask design(J1886) and a mould for roof tiles with monster-mask design(J1882). We focused on the restoration of the paint layer for the colored brick. As for the roof tile with monster-mask design, we cleared the existing poorly repaired part and then performed a complete conservation treatment. We would like to present the process to duplicate a roof tile with monster-mask design using a real mould, for the special exhibition entitled "Donated Tiles of Yoo Chang-jong".