Learning to be Architect

After concrete is cast, honeycomb may appear on the surface or inside the concrete structure. These honeycomb structures are hollow parts of the structure where concrete has not reached during the casting process. Reasons for this are associated mostly with poor workmanship during casting, such as: Inadequate and improper vibration when filling the concrete in Big or chunky aggregates that prevent the flow of concrete Concrete mixer that is too dry/ too stiff To rectify concrete honeycombing, it is necessary to use this material called "pressure grout" rather than conventional cement. This is because when pressure grout is applied, the pressure it has when it is injected will make it spread out across the honeycomb area and fill up all the holes effectively. If conventional cement is applied, it will only cover up the visible portions of holes on the surface, leaving honeycomb holes further in the cast portions left unfilled. When this occurs, the effectiveness of th...

Dry Riser A riser that is usually dry, but could be filled with water pumped in from a fire truck when required to fight fire The riser connects to a landing valve on each floor In Singapore, this usually applies to buildings between 10m - 60m in habitable height, and any basements Wet Riser: A riser that is always kept full of water to fight fire. Usually required for high rise buildings in which the floors are too high for the fire brigade to pump water up efficiently when necessary The riser connects to a landing valve on each floor In Singapore, this usually applies to buildings exceeding 60m in habitable height Breeching Inlet: A breeching inlet is a connection point that feeds water from a fire truck up into a dry riser It is usually located on the ground floor; when not on the ground floor, it is on the main floor accessible by the fire truck Hydrant: A valve point on the ground floor where fire trucks and fire men could tap water from Landing Valv...