Suramadu is a landmark in the history of construction of transportation infrastructure in Indonesia. Covering a length of 5,438 meters, it becomes the longest bridge in Southeast Asia. The pillars planted into the seabed contain antirust cement. The cement, produced by PT Semen Gresik, is called Special Blended Cement (SBC). Its materials are blended in such a way that the cement is resistant to seawater, sulfate (of sulfuric acid), and cobalt. I