STUDY FOR THE DETERMINATION OF CONCRETE ELASTIC MODULUS, POROSITY, AND COMPRESSIVE STRENGTH USING ULTRASONIC NON- DESTRUCTIVE TEST

• Main Author: Sefano Nur Aziiz, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/62756
• Institution: Institut Teknologi Bandung

Modulus of elasticity, porosity and compressive strength are several of many important material properties especially in structural application. In this context concrete will be our concern to be researched. Concrete belongs to ceramic materials which have various modulus of elasticity. That is happen related to the effect of porosity occurred in concrete making specially in sintering process. Generally, mechanical testing is a basic test to determine modulus of elasticity but nowadays technology has been innovating almost every single aspect inside the industry and ultrasonic testing to determine modulus of elasticity came as a solution. Ceramic materials are advanced material to be tested with mechanical testing due to its brittle properties. Thus, this research has view to determining modulus of elasticity with ultrasonic testing, also determining amount of porosity that existed in concrete, its compressive strength and conclude the effect of water per cement ratio on those three values. Ultrasonic was tested on 39 samples with variety of w/c ratio 0,272 – 0,9 on 50kHz frequency. The mean value result of ultrasonic testing for modulus of elasticity is 16,011 GPa, 13,366 MPa for compressive strength and 3,691% of porosity. Known that the greater w/c ratio the greater porosity existed in materials and decreased the value of modulus of elasticity and its compressive strength. The result of these tests still has errors compared to the data from the literature because there are several factors that would be discussed in this research.