Compressive Strength Estimation of Recycled Coarse Aggregate Concrete Using Ultrasonic Pulse Velocity

Abstract:

National effort to recycle construction waste as structural concrete usage of high economic value is ongoing, but performance rate of recycling is a low-level due to a lack of awareness on the recycled aggregates. Accordingly, the goal of this study was to verify the structural applicability of recycled aggregates. This study compared a compressive strength based on the replacement ratio of natural aggregate and recycled aggregate, and analyzed a correlation of wave velocity due to the increase in compressive strength under the same condition. The 『design standard strength – replacement ratio of recycled coarse aggregate』 was set to total 12 combinations by applying 0, 30, 50, 100[%] replacement ratio of recycled coarse aggregate to 21, 27, 35[MPa] to the design standard strength. During the experiment of fracture strength, strength degradation due to the replacement rate of recycled coarse aggregate did not occur, and it was found that the wave velocity also increased along with an increase in strength due to the age of recycled coarse aggregate concrete.

• Periodical: Applied Mechanics and Materials (Volume 147)
• Pages: 288-292
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.147.288
• Online since: December 2011
• Authors: Yong Taeg Lee, Seong Uk Hong, Hyun Suk Jang, Sang Ki Baek, Young Sang Cho
• Keywords: Compressive Strength, Concrete, Recycled Coarse Aggregate, Replacement Level, Ultrasonic Pulse Velocity

References

[1] 2010 Excellent utilization casebook of Recycled coarse aggregates · Recycled ascon silo Ministry of Land.

[2] KS F 2573: 2006 Recycled aggregate for concrete.

[3] KS F 2731: 2008 Testing method velocity of ultrasonic pulses to conclude compressive strength of concrete.

[4] KS F 2731: 2008 Testing method for velocity of ultrasonic pulses to conclude compressive strength concrete.