정진우  김용곤

Vol. 36,  No. 6, pp. 34-47, Dec.  2021
10.14346/JKOSOS.2021.36.6.34

allowable compressive stress design standard Experiment system scaffold system support

PDF

Facility-related safety failures such as the collapse of 00 Bridge currently under construction and the determination of the lowest safety rating for a large-sized building in Gangnam continue to occur. In the ready-mixed concrete industry, illegal acts such as the use of unapproved cheap materials to cut back on the cost due to the growth slowdown in construction industry or reduction of cement volumes by deceiving the approved specific mix are being caught by police every year, leading to serious problems in concrete quality. To solve these problems, this study developed a structure traceability management system that inputs all the information including raw materials used for concrete, manufacturers, placing environments, and quality test result values in real time and manages them in a form of electronic document. To set up this system, a method of managing the present conditions from mixing design to placing was reflected through electronic documents. In order to secure reliability for concrete quality tests, a function that converts photographed test results into electronic documents using the mobile O.C.R (Optical Character Recognition) was developed, which is currently applied to 80 domestic construction sites in Korea. After the set-up, 9,735 mixing-design data and 10,025 quality test data have been stored as electronic documents in the 80 construction sites for 14 months. Additionally, the time to prepare documents according to the quality test was reduced by 74% from the previous 238 minutes to 62 minutes, proving the effectiveness in work efficiency. Data managed with these electronic documents will utilize a big data system and be helpful in identifying optimal mixing designs, structures, and structural forms of ready-mixed concrete by region.