Assessment of High Strength Concrete Using the Ultrasonic Pulse Velocity

Publish Year: 1388
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

ICSR02_097

تاریخ نمایه سازی: 22 اردیبهشت 1398

Abstract:

The ultrasonic pulse velocity (UPV) of range of high strength concrete (HSC) ranging from 50-120 N/mm2 was measured to assess concrete quality.Crushed limestone and gravel aggregates of 10mm single size and sintered fly ash of high porosity were used. 100mm cubes and Prisms (275 76 76 mm), were used as test specimen after they were initially water cured or air dried for days then oven dried at 105°C or at 50°C then 105°C. The influence of mix composition, curing regime, drying temperature, incorporation of 10% condensed silica fume (csf), and effect of cracking resulting from the applied loads were investigated. The cubes were subjected to different levels of compressive stress/strength ratio loading (0.3, 0.6, 0.9) for times, while the concrete prisms were subjected to different levels of torsional stress/strength ratio loading (0.6,0.9) for times, then used to measure the ultrasonic pulse velocity. The ultrasonic pulse velocity was found to give good indication of the concrete quality and reflected thechanges which occurred in the concrete microstructure due to the change in mix composition, curing regime, moisture content or damage. The ultrasonic pulse velocity was found to correlate with the concrete compressive strength and torsional strength values.

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Authors

Asaad Ahmed Elshab

Al-Fetah University, Faculty of Engineering, Civil Eng. Dep.

Naje Emhemed Saleh

۷th of October University, Faculty of Engineering