"chertl lyne C.ROXAS,Ronaldo S Gallardo,NOBUAKI OTSUKI,Takahiro Nishida,Gabriel Ariston S.LATORRE,manuel dm m.ortigas,Dexie Rae R.perez,Jalaloden B.TAGO","A Study on the use of Bamboo as Reinforcement for Concrete Mixed with Seawater","SEMINAR-WORKSHOP ON THE UTILIZATION OF WASTE MATERIALS 2013",,,,,"  Paper No.A11",2013,Sept.
"NOBUAKI OTSUKI,Ronaldo S Gallardo,Toshiki Annaka,Satoshi Takaki,Takahiro Nishida","Field Survey for Carbonation Depth of Reinforced Concrete Buildings in the Philippines","37th Conference on Our World in Concrete & Structures","Proceedings of 37th Conference on Our World in Concrete & Structures",,"Vol. 37",,"pp. 331-337",2012,Aug.
"S. Hirose,Ronaldo S. Gallardo,Prasert Suwanvitaya","Built enviroment: Design of infrastructure with reduced environmental impact",,"Sustainable Civil Engineering / Harmonizing Infrastructure Development with the Environmen","The University of the Philippines Press",,,"Page 98-121",2009,Mar.
"E. Mariquit,C. Centeno,C. Estrellan,C. Salim,L. Abella,S. Gallardo,H. Hinode","Study of photocatalytic oxidation of Humic Acid and its influence on PCB degradation","ARRPET II- DLSU 4th National Workshop",,,,,,2008,Oct.
"Ronaldo S Gallardo,Jason Maximino C. Ongpeng,NOBUAKI OTSUKI","NEURAL NETWORK MAPPING IN THE SIMPLIFIED DESIGN OFMIX PROPORTIONS USING COAL BOTTOM ASH WASTE IN CONCRETE HOLLOW BLOCKS","33rd Conference on OUR WORLD IN CONCRETE & STRUCTURES","33rd Conference on OUR WORLD IN CONCRETE & STRUCTURES",,,,"pp. 185-192",2008,Aug.