Non-destructive testing can be applied to various things, including sandwich panels. Sandwich panels made of EPS are greatly affected by the mixing process. Bad affect level homogeneity and reduce quality. In addition, improper thickness layers cores result in wall damage. For this reason, carrying out a non-destructive test on panel is necessary. This study aims determine material predict dime...

The advent of dry point transducers has allowed new possibilities for ultrasonic testing of concrete structures and rock specimens. Recent developments in the technology such as single and multi-channel ultrasonic pulse echo technology and the automated determination of the modulus of elasticity have been pushing back the boundaries of the method. The effect of this has been to increase the eas...

This paper aims to evaluate the non-destructive ultrasonic pulse velocity (UPV) test method for determining compressive strength of high concrete (HSC) after fire. The was determined through destructive cylinder and by measuring velocity. A total 10 equations that relate UPV were evaluated in a 20 samples. None well suited case HSC. proposed new equation showed suitable assessment post-fire dam...

Instrumentation for ultrasonic velocity and attenuation measurements in liquids and solids is described. 5 MHz pulse generator is assembled using CMOS integrated circuits (4011, 7414, 74121, and 4010), having pulse width 2 microseconds to 60 microseconds. The wideband receiver is developed using Wideband Low Distortion, High Gain Operational Amplifier (OPA 643). The gain and bandwidth of the re...

currently available non-invasive clinical methods for diagnosing osteoporosis are mainly associated with ionizing radiation. ultrasonic assessment of bone disease is a more recent technology. a theoretical explanation for the relationship between ultrasonic parameters and bone structure is necessary. thus, two types of bone samples of perspex (hap) and perspex-glass beads were produced. each ty...

Jembatan Loa Haur merupakan sebuah jembatan tipe rangka baja dengan bentang 60 meter dibangun pada tahun 1992 yang terletak Jalan Poros Samarinda – Tenggarong, Desa Bakungan, Kecamatan Janan Kutai Kartanegara Kalimantan Timur. Akibat kondisi lalu lintas dan beban kendaraan melintas semakin meningkat di Haur, untuk keamanan kenyamanan pengguna, perlukan evaluasi struktur jembatannya. Salah satu ...