1. Building Construction Technology I
PracticalSession no. 8
04.06.2012
Answerthese Questions:
- Formwork is : Its is an artificial support provided below and around the precast or cast
insitue concrete work.
- Formworkcan be made of:
o Steel andWood
- Write the advantagesof formworkmade fromsteel
o It can be usedfora no. of times.
o It isnon absorbent.
o Smoothfinishsurface obtained.
o No shrinkage of formworkoccurs.
o Easy to use.
o Its volume isless
o Its strengthismore.
- Write some elementsthat duringtheirconstructionthe formworkisneeded:
o Foundations
o Wall
o Column
o Slabs& beams
o Stairs
- Write aboutmaintainingthe formworks:
o For wooden formwork use cardboard or plastic fiber board. Bolt hole places must
alsobe repaired.
o For steel formwork plates must be leveled by mallet and loose corners must be
welded.
- Time of formworkremoval dependson:
o Type of Cement
Rapid hardening cements require lesser time as compared to OPC (Ordinary
PortlandCement)
o Ratioof concrete mix
Rich ratio concrete gain strength earlier as compared to weak ratio
concrete.
o Weathercondition
2. Hydration process accelerates in hot weather conditions as compared to
coldand humidweatherconditions.
- Formworkcost iscontrolledby:( what affectthe costof formwork? )
o FormworkMaterial cost
o Formworkerectingcost
o Formworkremoval cost
o Formworkjointingcost(NailsandCables)
o Labor charges.
- Scaffoldingis:
o It’s a temporary structure to provide a platform at different levels of a building
for workersand Materials.
- Write the typesof scaffoldings:
o Single Scaffolds
o Double Scaffolds
o LadderScaffolds
o CantileverScaffolds
o SuspendedScaffolds
o Steel orTubularScaffolds
- Shoringis:
o It isthe methodof providingtemporarysupport(shores) toanunsafe structure.
- Write Shoringtypes:
o Horizontal shoringorflyingshoring
o Vertical shoringordeadshoring
o InclinedShoringorflyingshoring
