Evaluation of High Grade Recycled Coarse Aggregate Concrete Quality Using Non-Destructive Testing Technique

Kencanawati, Ni Nyoman and Fajrin, Jauhar and Anshari, Buan and Akmaluddin, A and Shigeishi, Mitsuhiro (2014) Evaluation of High Grade Recycled Coarse Aggregate Concrete Quality Using Non-Destructive Testing Technique. In: The 3rd International Conference on Sustainable Technology Development (ICSTD Bali 2014) - Dipublished oleh Applied Mechanics and Materials (AMM)., 30-31 Oktober 2014, Bali, Indonesia.

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A large amount of waste concrete generates an environmental problem due to demolition of old concrete structures. To solve this problem, it is necessary to collect recycled aggregate from waste concrete. The conventional recycling technique of recycled aggregate from waste concrete does not indicate a significant quality to be re-used for making a new concrete. We proposed new techniques to produce high grade recycled aggregate by heating-grinding (H-G) method and heatinggrinding-acid (H-G-A) method. To ensure the quality of the concrete made from recycled coarse aggregate concrete, the non-destructive evaluation was conducted in this research. High grade recycled aggregate concrete were prepared in advanced using two methods mentioned earlier. Then, new concrete specimens were produced using those types of recycled aggregate concrete. After 28 days curing time, rebound hammer test and ultrasonic pulse velocity test were performed on recycled coarse aggregate concrete to examine the surface hardness and ultrasonic wave velocity of the concrete. Almost similar quality to natural coarse aggregate in terms of density, water absorption, sieve analysis achieved by both H-G recycled coarse aggregate and H-G-A recycled coarse aggregate. However, the surface hardness and ultrasonic wave velocity of H-G-A recycled coarse aggregate concrete is better than those of H-G recycled coarse aggregate concrete. That acid solvent enables to dismantle the cement paste from aggregate surface more effectively, so this types of recycled aggregate shows a better performance than the other one. Continued delamination reduces pores in the interfacial transition zone resulting better bonding mechanism between new cement paste and recycled aggregate surface.

Item Type: Conference or Workshop Item (Paper)
Keywords (Kata Kunci): non-destructive testing, hammer test, ultrasonic pulse velocity test, high grade recycled aggregate concrete.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Fakultas Teknik
Depositing User: Dr Jauhar Fajrin
Date Deposited: 16 Oct 2020 01:20
Last Modified: 16 Oct 2020 01:20
URI: http://eprints.unram.ac.id/id/eprint/17651

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