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Pandya A.B.,Central Water Commission CWC | Hadimoeljono B.,Directorate of Spatial Planning and Development
Irrigation and Drainage | Year: 2016

Managing knowledge is the key to the success of any professional network like the International Commission on Irrigation and Drainage (ICID). Fast-changing technologies influence the knowledge process. It is crucial that all knowledge management processes make use of developments in information and other technologies. In order to fulfil the mission of ICID of pooling and dissemination of knowledge in the field of irrigation, drainage and flood management, the strategies to manage knowledge have to align themselves with the available IT tools. ICID Working Groups engaged in various facets of irrigation, drainage and flood management need to make the best use of these technologies. The strategy theme 'Knowledge', under which activities related to knowledge management are organized, was reviewed during the 65th Meeting of the International Executive Council of ICID in September 2014 in Gwangju, Republic of Korea. This paper presents an overview of the knowledge management activities of various working groups and presents some of the decisions taken by the Council for its improvement. © 2016 John Wiley & Sons, Ltd.

Ramalingam S.,Central Water Commission CWC | Santhanam M.,Indian Institute of Technology Madras
Indian Concrete Journal | Year: 2012

Durability of concrete structures is dependent on the design mix used (i.e. ratio and quality of ingredients namely water, cement, fine and coarse aggregates, additives etc.), the concreting practices adopted (i.e. transportation, placing, compaction, curing, formwork used, cover adopted etc.) and on the exposure conditions to which it is subjected to during its life. The Indian Code IS 456:2000 for plain and reinforced cement concrete specifies five exposure classifications namely, mild, moderate, severe, very severe and extreme, which seem to be arbitrary and prescriptive in nature regarding durability requirements. Further, the classifications do not necessarily address the relevant mechanisms of concrete deterioration adequately. Given the importance of environmental effects on concrete service life and performance, it is necessary to have detailed classifications catering to all exposure conditions, which address the appropriate mechanisms of deterioration. This paper describes an attempt to propose a new environmental classification system for concrete construction in India. The shortcomings of the present system are described first, followed by a summarisation of the international developments in exposure classifications. Concrete mix designs from several construction sites across India executed by Central Public Works Department are then presented and analyzed in the light of the prescriptions made by codal provisions from a number of countries across the world. The results of the analyses, along with the relevant features of international developments, are used to finally propose a rational system for classification of concrete exposure conditions. Copyright © 2012 ACC Limited.

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