This study was performed to investigate the asbestos contents on bulk samples of 4 building types(public, commercial, residential, school) in chungbuk area and collected from june 3, 2010 to July 10, 2011. We classified the bulk samples into the regulated asbestos containing building materials(ACBM) and architecture materials by 4 building types at removal and disposal sites. The results were as follows. </br>The detection rate of the ACBMs were found mainly public(86.6%), and residential (82.1%) buildings. The founded asbestos were chrysotile and amosite. Compared with 4 building types, the contents of chrysotile in public, commercial, residential and school were 32.6% (3-70%), 43.9% (5-87%), 39.6(5-72%) and 46.7%(range 4-89%), respectively. The miscellaneous materials were found chrysotile and a mixed form with chrysotile and amosite for 4 building types. </br>In the architecture materials, the contents of chrysotile was found mainly in slate (11.4%, range 2-37%). The slate in residential had high asbestos content of chrysotile (15.9%, range 1-31%). The textiles which collected from 4 building types were found chrysotile, the mixed form. The contents of chrysotile in cement flat board in public, commercial, residential and school were 8.9% (2-24%), 7.1% (1-16%), 7.9%(1-29%) and 3.7%(1-9%), respectively. </br>In conclusion, this study is suggested that it should be contributed to manage the ACBM in 4 building types and to protect the health of workers at building removal sites.

140 buildings of Korean major cities were investigated for the presence of asbestos and man made mineral fibers (MMMF) in their construction materials. 73 (52%) and 84 (60%) buildings contained asbestos and MMMF in their construction materials, respectively, and 17 (12%) buildings contained both asbestos and MMMF. 75% of the asbestos containing buildings were mostly constructed during 1970's. 100% of underground shopping arcades, 90% of manufacturing workplaces, 84% of train and bus terminals had the asbestos containing construction materials. The manufacturing workplaces of Daejeon (89%) and Daegu (89%), which mostly had been built in the past, used asbestos containing building materials, while the building in Seoul, Busan and Jinju, which were constructed recently, used relatively lower asbestos containing building materials with 46%, 28%, and 33%, respectively. 9 building materials that have been widely used in Korea were analyzed using a transmission electron microscope equipped with energy dispersive X-ray analyzer (TEM-EDX) for their mineral contents. All asbestos fibers showed typical characteristics of chrysotile fibers with hollow tube structure. The average diameter ranged from 0.03㎛ to 0.05㎛, and the average length were ranged from 7.5㎛ to 12.0㎛. Atomic percentages of asbestos fibers were 51.9∼55.9% of Mg, 41.3∼44.3% for Si, and 2.7∼4.8% for Fe.