Sone Valley Portland Cement Factory is connected with its Limestone Quarry by an Aerial Ropeway. The factory is situated on the east bank of River Sone in village Deori Kalan and connected by an assisted railway siding for despatch of cement, Rohtas Brand by name. The chief raw material for cement manufacturing is obtained from Kymore Hills (called Rohtas Hill ) made famous in history by that war battered structure, known as the 'ROHTAS FORT'.
The invention of reinforced concrete is usually credited to 'Joseph Monier'; but his first constructions are antidated by those of 'Lambot', who in 1850 constructed a small boat of reinforced concrete and in 1855 exhibited the same at the Paris exposition.
