Cover StoryShown (from Left) Mr. Tsunemi Nag<strong>at</strong>a, Project Manager, Oriental Consultant-K<strong>at</strong>ahira & Engineers-Nippon Koei; Engr. Joshua M. Bingcang, SCTEX ProjectManager, <strong>Base</strong>s <strong>Conversion</strong> <strong>and</strong> Development Authority (BCDA); MGen EduardoJ Lena (Ret), SCTEX Program Director, BCDA; <strong>and</strong> Mr. Youichi Inoue, ProjectManager, Hazama Corpor<strong>at</strong>ion <strong>at</strong> <strong>the</strong> Nagoya Congress Center, Aichi, Japan,venue of <strong>the</strong> recently held 11th Intern<strong>at</strong>ional Conference on Asphalt Pavements.RP showcases<strong>at</strong> Int’l confaThe infamous eruption ofMt. Pin<strong>at</strong>ubo in June 1991,reputedly <strong>the</strong> secondlargest volcanic explosion of <strong>the</strong>20th century, is also considered<strong>the</strong> largest eruption in livingmemory. Resulting ash cloudssoared as high as 22 miles into<strong>the</strong> sky, with subsequent heavyrainfall setting off massivel<strong>and</strong>slides of volcanic mudknown as lahar.Damage infl icted by <strong>the</strong> phenomenon was estim<strong>at</strong>ed<strong>at</strong> billions of dollars, with hundreds of houses <strong>and</strong> o<strong>the</strong>rstructures ei<strong>the</strong>r collapsing under <strong>the</strong> sheer weight ofvolcanic ash or swept away by lahar fl ows th<strong>at</strong> inund<strong>at</strong>edentire towns <strong>and</strong> communities, in <strong>the</strong> process wreakinghavoc in <strong>the</strong> social <strong>and</strong> economic life of <strong>the</strong> people inCentral Luzon.The lahar apparently caused much destruction than<strong>the</strong> volcanic explosion itself.Almost two decades l<strong>at</strong>er, however, wh<strong>at</strong> used to bea social <strong>and</strong> economic bane in Central Luzon now formspart of a 21st century roadway, propelling commerce<strong>and</strong> property valu<strong>at</strong>ion upwards <strong>and</strong> serving as a dynamofor <strong>and</strong> properties <strong>the</strong> sustainable development of threebusiness hubs in <strong>the</strong> region.8
The <strong>Base</strong>s <strong>Conversion</strong> Development Authority(BCDA) recently presented before <strong>the</strong> 11th Intern<strong>at</strong>ionalConference on Asphalt Pavements (ISAP Nagoya 2010) inAichi, Japan <strong>the</strong> Subic-Clark-Tarlac Expressway (SCTEX),as a showcase of <strong>the</strong> optimized use of 10-cubic kilometerof lahar deposits readily available in <strong>the</strong> project site.Engr. Joshua Bingcang, of <strong>the</strong> BCDA said <strong>the</strong>utiliz<strong>at</strong>ion of lahar as embankment m<strong>at</strong>erial <strong>and</strong> mixingwith cement-based solidifying m<strong>at</strong>erial for Sub-base/<strong>Base</strong>Course became <strong>the</strong> main objective in promoting <strong>the</strong>project, which was made possible through <strong>the</strong> supportof <strong>the</strong> Japan Bank for Intern<strong>at</strong>ional Cooper<strong>at</strong>ion (JBIC).“The n<strong>at</strong>ure <strong>and</strong> physical characteristics of laharis similar to s<strong>and</strong> th<strong>at</strong> could withst<strong>and</strong> even <strong>the</strong> rainyseason,” Bingcang explained. “Mixed with cement, laharstrength could be utilized as a core m<strong>at</strong>erial for Subbase/<strong>Base</strong>Course.”Fur<strong>the</strong>r recognizing <strong>the</strong> practicality of using lahar in<strong>the</strong> construction of SCTEX, according to Bingcang, is <strong>the</strong>substantial reduction of construction time <strong>and</strong> cost.Bingcang noted th<strong>at</strong> since lahar is abundant in<strong>the</strong> area, <strong>and</strong> thus, can be easily managed in <strong>the</strong>construction site, <strong>the</strong> cost of using it for embankment<strong>and</strong> Sub-base/<strong>Base</strong> Course was lower compared to <strong>the</strong>gravel-based Sub-base/<strong>Base</strong> Course, not to mentionsavings in transport<strong>at</strong>ion <strong>and</strong> quarrying expenditures.“With this, <strong>the</strong> highway project is cost effective <strong>and</strong>environment-friendly since extracting lahar from <strong>the</strong> riversimproved <strong>the</strong> surface w<strong>at</strong>er fl ow,” he stressed.The SCTEX, which became fully-oper<strong>at</strong>ional lastJuly 25, 2008, provided a direct <strong>and</strong> seamless travel to<strong>the</strong> three key growth areas in Central Luzon—<strong>the</strong> SubicBay Special Economic <strong>and</strong> Freeport Zone in Zambales;Clark Special Economic Zone in Pampanga; <strong>and</strong> CentralTechno Park in Tarlac.Completion of <strong>the</strong> SCTEX enhanced <strong>the</strong> region’sviability as world-class industrial center, <strong>and</strong> an effi cientagro-industrial logistic complex.continued on page 10CTEXbBCDA represent<strong>at</strong>ives with o<strong>the</strong>r convention participants in a souvenir shot <strong>at</strong> a tunnel, which is being constructed aspart of <strong>the</strong> New Tomei Expressway, touted to be <strong>the</strong> longest expressway in Japan. (Inset) Mr. Youichi Inoue, ProjectManager, Hazama Corpor<strong>at</strong>ion, MGen Eduardo J Lena (Ret), SCTEX Program Director, <strong>and</strong> Engr. Joshua M. Bingcangin <strong>the</strong> tunnel loc<strong>at</strong>ed in Cental Japan.9