아스팔트 공진주 시험 Warm Mix Asphalt through Resonant Column Test

영신컨설턴트 (02) 529 8803 ystcha@naver.com 2021 6

 

asphalt concrete 탄성계수는 온도와 주파수에 영향을 받으며 asphalt concrete 포장설계에 중요한 요소입니다. 온도가 높으면 asphalt concrete의 탄성계수 작아 진다. 그러므로 온도 제어가 가능한 공진주 시험기로 asphalt concrete의 탄성계수를 측정할 수 있습니다

 

Warm Mix Asphalt 공진주 시험기

 

Temperature Control System for Heating and Cooling. 

A climate controlled version for -20°C to +60°C 

Effect of temperature on modulus and damping ratio from RC test, after Allen 1981

typical asphalt concrete sample, 60 mm in diameter and 120 mm tall, a typical mass polar moment of inertia of 0.00037636 kg-m2.

 

This value yields a mass polar moment of inertia ratio of 0.09004, which will result in a resonant frequency in the range of 600 Hz,

 

Designed top and bottom connections for gluing asphalt concrete to the drive system ASTM D4015-07 Evaluation of Nondestructiveness of Resonant Column Testing for Characterization of Asphalt Concrete Properties VOL. 46 / NO. 2 / JANUARY 2018

 

 

 

The resonant column (RC) test has been used as a nondestructive test (NDT) to study dynamic properties of soils for the past few decades. With some modifications, this test can also be employed to characterize properties of asphalt concrete, especially because  these properties are strongly dependent on the loading frequency. A conventional RC 

apparatus was retrofitted to characterize asphalt concrete properties at a range of temperatures from 10 Deg C to 45 deg C. 

 

측정의 예

Linear elastic response of specimens at different temperatures

 

Shear modulus versus test temperature in RC tests.