astm e1440-91 Articles

  • Ensuring Water Quality in Africa

    Water is essential for life, and “access to safe water is a fundamental human and, therefore, a basic human right.” With this statement and his address on World Water Day in 2001, United Nations Secretary-General Kofi Annan put a spotlight on what continues to be a global problem: clean water. This year completes the UN “Water for Life” international decade for ...


    By ASTM International

  • ADMS 5 Flat Terrain Validation Kincaid, Indianapolis and Prairie Grass

    1 Introduction This document presents a summary of ADMS model results compared against three well known field data sets: Prairie Grass. Kincaid and Indianapolis. Results are also presented for two U.S. models: ISCST and AERMOD. ISC ST is the United States Environmental Protection Agency model. It is a so-called 'old generation' model, similar to the UK R-91 model, based on the ...

  • A Thickness Equation for Nonwoven, Needle-Punched Geotextiles under Normal Loading

    An equation to predict the thickness of nonwoven, needle-punched geotextiles under normal compressive loading is proposed. The equation is t=(t0-t8)e-as+t8 in which, t0 is the initial thickness, t8 is a limiting thickness, s is the normal stress, and a is an empirical coefficient. Comparison with thickness data obtained in multiple tests on eight different geotextiles using an in-plane, radial ...


    By ASTM International

  • Calibration of a Dynamic Penetrometer for Compaction Quality Control of Boiler Slag

    A dynamic penetrometer was designed for the purpose of evaluating compaction quality in fills constructed with boiler slag. Laboratory and field calibration tests were conducted to study the effect of densification on dynamic penetration resistance. The effects of specimen preparation method (pluviation and impact compaction) and saturation on dynamic penetration resistance were investigated in ...


    By ASTM International

  • Denver Colorado - Harvard Gultch Interceptor - Case Study

    Summary Pipe penetrating radar (PPR), a new pipe inspection technology was used for condition assessment in a 27 inch interceptor in Denver, CO. Metro Wastewater Reclamation District (MWRD), the owner of the interceptor had limited information about the condition of the pipe, so they contacted SewerVUE in order to undertake a multisensory pipe condition assessment that included CCTV, PPR ...


    By SewerVUE

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