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ultrasonic wave propagation in discontinous rock
Experiments were carried out to determine the effect of discontinuities on the propagation of ultrasonic waves in samples of chalk and sandstone obtained from tunnel sites at Chinnor, Oxfordshire and Warrington, Cheshire respectively. In particular the effect of normal stress across a closed discontinuity was investigated. Tests to determine the wave velocity, attenuation coefficients and the e…
The effects of ground vibration during bentonite shield tunnelling at Warrington
The maximum measured ground vibration (expressed in terms of resultant peak particle velocity) was 3.9 mm/s. The vibration was characterised by random high velocity particle motions resulting from impacts between the machine's disc cutters and glacial boulders in the tunnel face. Surface and subsurface settlement measurements were made along the tunnel line. Laboratory tests and other field dat…
NEW CIVIL ENGINEER CONFERENCE: Compaction Technology=Teknologi Pemadatan
Ruang Koleksi Umum Rak: 3
Education for Librarianship: Decision in Organising a System of Professional …
"Education for Librarianship: Decisions in Organising a System of Professional Education" refers to a foundational book by Peter G. New, focusing on the strategic planning and core principles (access, ethics, technology) needed to structure librarian training, addressing shifts from traditional roles to modern information management, emphasizing practical skills, lifelong learning, and the evol…
Modulus Properties of Plasticized Sulfur Mixtures
Trr No. 1323 Materials And Construction, pp. 85-93 Plasticized sulfur is a total replacement for asphalt cement. As a result, the potential of using plasticized sulfur in lieu of asphalt cement in paving mixtures is attractive in this day of capricious supply and pricing of petroleum products. The modulus properties of selected plasticized sulfur mixtures were studied. The plasticized sulfur b…
Performance Assessment of Binder-Rich Polythelene-Modified Asphalt Concrete M…
Trr No. 1317 Materials And Construction, pp. 1-9
