Description: IBT Cement Carriers vs Bulk Carriers, Van Aalst Group - Cement Carrier, Ship unloading of bulk cement, IBT Vessel: Cement Discharging Sequence, Timelapse building Cement Carrier Cembrook, Self-Discharging Cement Carrier for LafargeHolcim
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A cement is a binder , a substance that sets and hardens and can bind other materials together. The word "cement" can be traced back to the Roman term opus caementicium , used to describe masonry resembling modern concrete that was made from crushed rock with burnt lime as binder. The volcanic ash and pulverized brick supplements that were added to the burnt lime, to obtain a hydraulic binder, were later referred to as cementum , cimentum , cäment , and cement .
Cements used in construction can be characterized as being either hydraulic or non-hydraulic , depending upon the ability of the cement to set in the presence of water (see hydraulic and non-hydraulic lime plaster ).
Non-hydraulic cement will not set in wet conditions or underwater; rather, it sets as it dries and reacts with carbon dioxide in the air. It can be attacked by some aggressive chemicals after setting.