Journal - April 2011

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JOURNAL OF THE INSTITUTION OF ENGINEERS, SRI LANKAVol. XXXXIV, No. 02, April 2011 ISSN 1800-1122


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ENGINEER

JOURNAL OF THE INSTITUTION OF ENGINEERS, SRI LANKA

EDITORIAL BOARD

Eng. (Prof.) A. K. W. Jayawardane

Eng. Priyal De Silva

Eng. W. T. R. De Silva

Eng. (Prof.) K. P. P. Pathirana - Editor Transactions

Eng. (Prof.) T. M. Pallewatta - Editor ENGINEER

Eng. (Dr.) D. A. R. Dolage

Eng. (Miss.) Arundathi Wimalasuriya

Eng. M. L. Weerasinghe - Editor SLEN

Eng. (Dr.) K. S. Wanniarachchi

Eng. (Prof.) S. S. L. Hettiarachchi

The Institution of Engineers, Sri Lanka120/15, Wijerama Mawatha,

Colombo - 00700

Sri Lanka.

Telephone: 94-11-2698426, 2685490, 2699210

Fax: 94-11-2699202

E-mail: [email protected]

E-mail (Publications): [email protected]

Website: http://www.iesl.lk

CONTENTSVol.: XXXXIV, No. 02, April 2011

ISSN 1800-1122

From the Editor

SECTION I

Development of an Economical HighEarly Strength Concrete mix for paving ofProvincial Roads in Sri Lankaby: Eng. (Dr.) W. K. Mampearachchi, J. V.Kosgolla and Eng. (Prof.) S. M. A. Nanayakkara

Use of Rice Husk Ash Blended Cementto Produce Cement Sand Blocks: OptimalLevel of Cement Replacement forCompressive Strengthby: Eng. (Dr.) D. A. R. Dolage, K. Mylvaganam,

P. Mayoorathan, and S. InparatnamLaboratory and Field Investigations ofGenerator Stator Insulationsby: Eng. (Prof.) M. A. R. M. Fernando andEng. G. A. Jayantha

Assessment of Nearshore Wave Climate offthe Southern Coast of Sri Lankaby: Eng. (Dr.) P. P. Gunaratna, Eng. D. P. L.Ranasinghe and Eng. Miss T. A.N. Sugandika

The following Paper was placed in the First Over35 years of age Category at the Competition onWater as A Catalyst for Development: Roleof Engineering and Technology 2009/2010.Sponsored by:International WaterManagement Institute (IWMI)

Irrigation Infrastructure ManagementRequirements to Ensure Water Securityfor Impoverished Rural Populations underClimate Change Scenarioby: Eng. (Prof.) N. T.S. Wijesekera

SECTION II

Detention Reservoirs as a Flood ControlMeasure

by: Eng. (Mrs.) P. Hettiarachchi

7UDIF&DOPLQJ,WV$SSOLFDELOLW\LQ6ULLankaby: Eng. (Prof.) K. S. Weerasekera

Adjudication in Construction Contractsby: Eng. A. Ranasinghe and J. C. Korale

Notes:

ENGINEER, established in 1973, is a QuarterlyJournal, published in the months of January, April,July & October of the year.

$OOSXEOLVKHGDUWLFOHVKDYHEHHQrefereed in anonymity

by at least two subject specialists. Section I contains articles based on Engineering

Research while Section II contains articles ofProfessional Interest.

Sangupiddy Bridge

This new bridge was constructed at a former ferry pointover the Jaffna lagoon on the Navathkuli-Karethivu-Mannar(A32) road, 17 km from Navathkuli. Owing to this bridge,the travel distance from Mannar to Jaffna is reduced by110 km. The seven span steel superstructure bridge (inset)completed in October 2010, is 288 m long with 7.4 m widetwo lane carriageway. The center span which is the longestis 40 m. The bridge, constructed for the government of SriLanka, with Road Development Authority as the Engineer,by Access Engineering /Mabey & Jhonson J.V., cost Rs. 1037

million and took 07 months to complete.

Courtesy of:Eng Rohitha Swarna,Deputy Director Bridge Designs Division, RDA

The statements made or opinions expressed in the

(1*,1((5 GR QRW QHFHVVDULO\ UHHFW WKH YLHZVof the Council or a Committee of the Institution ofEngineers Sri Lanka, unless expressly stated.

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FROM THE EDITOR ...................

Triumph in the war against terrorism, professed as unattainable by many, was secured by Sri Lanka,

two years ago. However, the physical scars left in the most affected parts of the country by a thirty yearlong subjugation to terrorism would need more time and effort in the future to heal. Highest in the

list for rehabilitation are the destroyed or neglected infrastructure facilities in these areas of north and

east of the island. Reinstating the transport infrastructure of road and railway networks are the most

important and critical tasks faced by the government, to bring in normalcy and security to the long

suffering people of these regions.

It goes without saying that this endeavour rests solely in the active realms of Engineers. Through the state

engineering organizations of the country, Engineers have taken up this challenge, achieving milestones

at a steady rate. During the past couple of years, the road network in the north and east have improved

VXEVWDQWLDOO\WKRXJKDGYHUVHZHDWKHUFRQGLWLRQVUHVXOWLQJLQUHFRUGRRGVKDYHFUHDWHGKDYRFLQWKHVH

areas during the past year. Not merely being content with rehabilitation of the infrastructure, our

Engineers have gone a step ahead to install improved versions of the same.

The Sanguppidy bridge on the Navathkuli-Karethivu-Mannar (A32) road is a good example of this

trend. Earlier the continuation of this road over the Jaffna lagoon was via a ferry, now upgraded to a

288 m long two lane bridge. Throughout the areas for rehabilitation, as well as the other parts of the

country, Engineers are spearheading many such projects silently. While their commitment and hard

work is beyond question, populace of the country do not get to know of the achievements of these

Engineers as they are realized. Though modesty is a virtue to be admired, wouldnt Engineers be doing

the people of the country a favour by letting them know about their accomplishments?

Eng. (Prof.) T. M. Pallewatta, Int. PEng (SL), C. Eng, FIE(SL), FIAE(SL)

Editor, ENGINEER, Journal of The Institution of Engineers.

III


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