CIRIA Report 108 (1 = Wall, 2 = Column) , Concrete Structure Type Coefficient dependent on the size and shape of the formwork Cement type Coefficient dependent on the constituent materials of concrete Weight Density of Concrete Vertical Pour height Vertical Form height The rate at which the concrete rises vertically up the form Concrete temperature at placing ( 36/T+16 )², Temperature Coefficient
R > H, the fluid pressure (Dh) should be taken as as the design pressure. pressure.
3.00 m 9.90 m
C1 R incorporates the effects of vibration and workablity Vertical Form height
Pressure is, D[C1√R+C2K√(H- (C1√R)])
97.16 kN/m² 245.00 kN/m²
Calculated Pressure Dh, Pressure
CONCRETE PRESSURE DIAGRAM
- The Design Pressure is the smallest between the two calculated values.
12
Design Pressure = 97.16 kN/m²
Hz =
3.89 m
Height of Hydrostatic Zone
10
0, 9.80
3.0 Values of Coefficients C1, C2: Walls: Columns:
C1 C1
1.00 1.50
)
( 8 : section where either the width or breadth > 2.0 m h T : section where both the width and breadth < 2.0 m H
Concrete Value of C2 - OPC, RHPC or SRPC without admixtures 0.30 RHPC or or SR SRPC wi without ad admixtures, 0.30 - OPC, RH except a retarder - OPC, RHPC or SRPC with retarder 0.45 0.45 - LHPBFC, PBFC, PPFAC or blends containing less than 70% ggbfs or 40% pfa without admixtures 0.45 - LHPBFC, PBFC, PPFAC or blends containing less than 70% ggbfs or 40% pfa with any admixtures, except a retarder - LHPBFC, PBFC, PPFAC or blends containing 0.60 less than 70% ggbfs or 40% pfa with a retarder 0.60 - Blends containing more than 70% ggbfs or 40% pfa
G I E H R U O P L A C I T R E V
97.16, 5.913
6
4
2
0
0, 0
0
50
97.16, 0.00
100
150
CONCRETE PRESSURE (Pd)
J:\Formwork (RMD- Quick Check)
You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com (http://www.novapdf.com))
