Earticle

Interoperability is possible to Architecture Engineering Constructions(AEC) industry by introducing Building information Model(BIM). The Shop-drawings are created directly from 3D detail model based on the BIM and it increases the productivity of shop-drawings effectively. The current creating process of the shop drawings is to repeat the assigning of the properties for every drawings and then, this complicated procedure is needed to be intelligent. This paper proposes for the smart creating process of shop drawings to the sort of drawing types. The drawings guideline and standard are analysed and manipulated to Data Base(DB), which is packaged to establish the process. This smart process could solve the unnecessary time waste, duplication input and error occurrence etc. and provide speed and effective productivity of creating shop-drawings

Nowadays, residents who pursue a high quality and diversity of the life want to new plan for their apartment. But the wet process of reinforced concrete wall-slab structure has restricted residents demands. So long life housing which can satisfy desire of residents as a new concepts has raised up. This study has analyzed time-scheduling prediction of Long Life Housing Infill-system. Objective of study comprehends change of Long Life Housing time-scheduling procedure compared with bearing wall system. Investigate finish work 1 generation to Infill-system of long life housing mock-up house, FPWS(Flat Plate Wall System), bearing wall system house and execute construction planning and scheduling prediction and long life housing mock-up house process did comparative analysis. Mock-up house effects construction period reduction, In infill system, the working period of that adjusted to FPWS has been decreased 28 days, and the working period in long life housing has been decreased 21 days than that adjusted to bearing wall system(30). The reason why is the working system was taken dry process for construction instead of wet process. Result that forecast construction period of Infill-system of bearing wall system house provision long life housing mock-up house, it is 18.75% when is 10 floor, and it is 22.22% when is 15 floor, and it is 31.25% when is 20 floor, and predicted that w hen it is 30 floor, construction period more than 35.00% can be shorten.

An increase in number of high-rise buildings, large scale civil structures, and strengthened requirements for durability of buildings substantially extend the necessity of high-strength concrete with extended durability. With rapid urbanization in the end of the 20th century resulting in under supply of natural aggregate for fine concrete, new technologies have been under development to use recycled coarse aggregate(RCA) for ready-mixed concrete. In this study, as a part of the effort to use of RCA, 36 specimens were made to test the bond stress between ready mixed RCA concrete and reinforcing bars as different replacement ratio of RCA. It is found through this test that there is no significant difference between the concretes with RCA and those without RCA in the maximum bond stress with reinforcing bars. The maximum bond stress acquired in the test is within the requirements when comparing to the existing bond stress suggested by ACI, CEB-FIP and the 島(Sima). The test result also shows that despite the increase of replacement ratio of the RCA, the bond strength of the ready mixed RCA concrete is similar to that of natural aggregate concrete.

The purpose of this study is to evaluate the properties of hydration heat of mass concrete using blast-furnace slag cement and fly-ash based on the replacement ratio of fly-ash and elapsed time. For this purpose, concrete blocks are manufactured and hydration heat of concrete are measured. Also, analysis of replacement ratios to the properties of hydration heat of mass concrete are conducted. Replacement ratios used in this study are 10%, 15% and 20% to weight of blast-furnace slag cement. By the experiments and analysis, according to increasing replacement ratio, hydration heat is decreased and elapsed time to peak temperature is delayed. The more fly-ash are replaced, increasing and decreasing rate of hydration heat are reduced. After 96 hours are passed, the properties of hydration heat of concrete are similar, regardless how much it has replaced fly-ash.