İnşaat Mühendisliği Bölümü Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/1943
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Conference Object Citation - Scopus: 3Wireless Real-Time Monitoring System for Steam Cured Concrete Maturity Calculation(IEEE, 2021-10-06) Bekmezci, İlker; Sürücü, Engin; Yıkıcı, AlperInternet of Things (IoT) enabled LoRaWAN® system is adopted to monitor concrete temperatures in real-time via wireless devices embedded within concrete cover. Maturity method is employed to predict compressive strength development of steam cured precast concrete segments produced at an automated manufacturing plant using carousel system. The concrete segments embedded with IoT devices are exposed to steam curing in thermally insulated chambers and transferred to the evacuation line outside of the plant after being demolded. Real-time temperature measurements are continuously compared to predefined target values, so that an email notification could be send to production engineer. In this study, concrete temperatures as well as curing ambient temperatures for two different cases during segment manufacturing are successfully recorded. The details of IoT wireless system to estimate the strength of concrete are presented.Conference Object Citation - WoS: 2Citation - Scopus: 1Eaf Ladle Steel Slag as a Geo-Material: Compaction and Shear Strength Characteristics(Amer Soc Civil Engineers, 2018-06-06) Yıldırım, İrem Zeynep; Prezzi, Monica; Ylldlrlm, Irem ZeynepThe numerous issues associated with the excess steel slag that is disposed of in landfills every year can be reduced by using it as a geo-material. This paper provides the results of laboratory tests (i.e., sieve, hydrometer, specific gravity, compaction, compaction-particle degradation, and large-scale direct shear with a box size of 30.5 x 30.5 x 20 cm) performed on electric-arc-furnace ladle [EAF(L)] steel slag from a mini-mill in Indiana. Based on standard proctor test results, the maximum dry unit weight values of the EAF(L) steel slag were in the 16.8-to-20 kN/m(3) range at the optimum moisture contents of 11-13%. The results of the large-scale direct shear tests performed on EAF(L) steel slag, compacted at 95-100% relative compaction and sheared with normal stress ranging from 50 to 300 kPa, showed that it has excellent frictional characteristics, with friction angles between 40 and 45 degrees. Based on the results from this study, due to its shear strength characteristics, EAF(L) steel slag has the potential to be utilized as a geo-material to improve the shear strength of various marginal soils.