COST ANALYSIS OF RUBBLE RECYCLING AND CAST-IN-PLACE WALL SYSTEM FOR HOUSE RECONSTRUCTION SCHEMES OF THE YOGYAKARTA EARTHQUAKE AFTERMATH

Abstract

Earthquake is a disaster which often forces engineers and common people to pay attention, particularly, when large-scale earthquake occurs in residential where many non-engineered houses are present. The resulting destruction often leaves further social and environmental problems. Many are left homeless, and a large volume of rubble must be scrupulously handled. This research concerns the relief action of an earthquake aftermath, in which the reconstruction program for the victims becomes the focus of the analysis. Some previous researches on earthquake reconnaissance are reviewed, a case study is taken from the reconstruction program of the Yogyakarta earthquake aftermath, and a pilot project of cast-in-place re-mortar wall was conducted and observed. Three methods of rubble handling related to reconstruction schemes; new bricks and re-bricks system (Scheme-I), re-bricks and re-mortar blocks system (Scheme-II), and re-bricks and cast-in-place re-mortar wall system (Scheme-III); were analyzed and discussed. It has been concluded that the application of rubble recycling could reduce wall construction cost up to 20%. Although the case study was taken from Indonesia, the result may be applied to other reconstruction programs in other regions, especially those with similar conditions and developments.