Earticle

Recently, according as the quality of life is improving, we are concerning the IAQ. But IAQ level is more deteriorating because people are using imprudent construction material. There are insufficient legal standard, study and research about IAQ. The purpose of this study is to apply IAQ and to develop an indoor pollutant density prediction program based on the indoor pollutant substance data.

Domestic construction-market to advance the procurement constantly endeavored to improve government's procurement such as benchmarking advanced country's procurement. Especially, among such efforts, a study on the best-value bid actively was progressing, but to realize Best-Value needs to improve evaluation-method of bidders. However best-value were not evaluated to existent evaluation-methods. Once again new evaluation method of bidders is developed. so this paper suggests selection method of non-price factor so that at processing selection of a suitable bidder is realize best-value. The process of selection method is as follow. 1) Organize committee that consists of construction specialist to deduce primary non-price-factor. 2)Deduce the primary non-price factor from best-practice of advanced country. 3) Deduce the secondary non-price-factor from construction specialist's decision. 4)Analyze weight of non-price through using AHP. Input data of AHP analyzed results through specialist's questionnaire. 5) Allot points of each factor according to analyzed weight

According to the advance of the industrial technique, the human has been lived a convenient and affluent life. But, it recently was raised social problems, such as Sick House Syndrome occurred from indoor air pollution, the water pollution from the domestic sewage. In the long run, we expect to run up expenses for processing pollutants by these indoor and outdoor environmental problems. Therefore, the purpose of this study is to establish a fundamental data about the photocatalyst for the improvement of indoor air and water quality. As the results of this study, the ingredient of colored tar which are on the coated interior finishing materials is decolorized as confirmed visible for a duration of time. Also, the purification on the water quality is that the concentration of BOD, T-N, T-P decreased than the initial. This means that the water quality is increased by using it.

The study was intended to identify the absorption of flying salinity and internal distribution into the concrete of the buildings aged 20 to 40 years in a coastal district through the tests. The buildings subject to sampling for the test includes apartment and hotel buildings located within 500m from the seashore in the area of Nam-Gu, Suyeong-Gu and Haeundae-Gu in Busan. Those old buildings were mostly planned to be rebuilt or demolished. The core specimens were taken from the buildings, and were cut into 10㎜ and 50㎜ in depth and soluble salinity contained in concrete specimen were measured. The results are follows. (1) An average content of salinity contained in the specimen taken at the survey area was minimum 0.09㎏/㎥ and maximum 5.55㎏/㎥, which had a wide range of distribution. Viewing the content by specimen, the specimen at 10㎜ depth taken from the P-building contained as much as 13.17㎏/㎥, indicating the highest level among the specimens. (2) Among 51 specimens, 14(27%) were within the allowance of 0.3㎏/㎥ and 8(16%) were in 0.3㎏/㎥～0.6㎏/㎥, while remaining 29(57%) were in the range of 0.6㎏/㎥～5.5㎏/㎥, which was regarded a high level of salinity content. (3) The content of salinity was found to be dependent on distance from the seaside, age and coating type of building, and the content of salinity has been increasingly growing as long as the building exists. (4) In comparing the ratio of salinity distribution

As tiles are getting larger in size nowadays, interior ceramic tiles are often partly broken near joints and regularly cracked on the surface - Tile Side Breakage - after the attachment. In this study, large bathroom in real size was built to measure bond strength and ratio of length change, observe cracks and breakages with naked eye, and conduct the freeze-thaw experiment. Then, these factors were analyzed to identify the cause of Side Breakage and suggest the preventive measure. As a result, cement mortar enhances bond strength of the tile and resistance to cracks, and the more edges which is open, the more cracks tiles develop. Also, the installation of silicon expansion joints is considered as the most effective prevention method of Side Breakage.

Through thermal environment measurement and diagnosis of HVAC system, heating condition of the S station building was investigated and problems was grasped from before this study. On the basis of this study, improvement scheme was prepared for improvement of heating condition. In this study, effect of improvement scheme was confirmed for saving energy of the S station building by CFD simulation and saving energy quantity was computed with improvement scheme. Results of this study are as follows. (1) The result of CFD simulation before improvement, heating of low rise space accumulate on a high temperature at high rise space of above 10m hight, thermal environment of 2nd floor area is presented badly. (2) The result of CFD simulation by improvement, the temperature is higher than 22.0℃ which is designed temperature of the S station building but the applied improvement in this CFD simulation was improved for outdoor air restraint in architecturally and attention of management is needed for better heating effect. (3) The result of saving energy quantity, 40.3% reduction can be saved by the case 1 improvement and 65.6% reduction can be saved by the case 2 improvement.