CONCRETE STRENGTH EVALUATION
To obtain compressive strength for existing building, we collect core samples from structural members by using the device named DD 120 HILTI Diamond Coring tool. ASTM C42/C42M is used for obtaining cylindrical core specimens with diamond impregnated bits attached to a core barrel. In-situ 4”/3” (dia) core cutting and testing from BRTC (BUET) lab by Universal testing machine (UTM) to determine compressive strength of concrete.
SCHMIDT RE-BOUND HAMMER TEST
Rebound Hammer Test is done according to ASTM C 805. The steel hammer impacts with a predetermined amount of energy, a steel plunger in contact with a surface of concrete and the distance that the hammer rebounds is measured.
ULTRASONIC PULSE VELOCITY ANALYSIS
Ultrasonic Pulse Velocity Test is conducted according to C 597. Ultrasonic Pulse Velocity Analyzer (Control Model No 58-E4900) is an incorporated unit of the pulse generator, time measuring circuit, receiver amplifier and time display into one circuit. Additionally, we can conduct true depth of crack of concrete also.
FERROSCAN
The ferroscan equipment offers a range of options for reporting, analysis and can be tailored to fit all design parameters. We are using the device called HILTI PS 200S scanner for locating reinforcing bars in concrete, measuring depth of concrete cover and estimating the diameter of the rebars in the uppermost layer in accordance with the specifications detailed in the technical data provided in these operating instructions.