Use of Multifrequency Backcalculation for Determining Moduli of a Pavement Structure

Use of Multifrequency Backcalculation for Determining Moduli of a Pavement Structure Kang, Yumin Vincent Primary Author mixed material bibliography ASTM 2000 id Indonesia pp. 383-397 Nondestructive Testing Of Pavements And Backcalculation Of Moduli Third Volume. Astm Stp 1375 The use of multifrequency backcalculation can overcome the limitation on the maximum allowable number of layers in most static backcalculation programs. However, its convergence may break down when using high-frequency deflections with static estimation. Based on the dispersive characteristics of the surface waves, a newly developed procedure for estimating the seed moduli was implemented. The proposed method was then applied to three typical profiles. The numerical results show that surface wave estimation improves significantly the convergence of the backcalculation process even for pavement systems with high modulus contrast. It also overcomes the frequency limitation found in the static estimation. PAVEMENTS 625.7(063) Perpustakaan Direktorat Bina Teknik Jalan dan Jembatan Direktorat Jenderal Bina Marga - Kementerian Pekerjaan Umum (NPP: 3273244A00000001) 625.7(063) Kan u 0000019180 My Library 625.7(063) Kan u 18509 machine generated