07-02-2010, 06:35 PM
FIBRE-REINFORCED FLY ASH SUB-BASES IN RURAL ROADS.pptx (Size: 187.24 KB / Downloads: 262)
FIBRE-REINFORCED FLY ASH SUB-BASES IN RURAL ROADS
SUB-BASE COURSES AND THEIR EVALUATION
SUB-BASE IS MADE OF BROKEN STONES,BOUND OR UNBOUND AGGREGATE
SUB-BASE COURSE PRIMARILY HAS THE SIMILAR FUNCTION AS OF THE BASE COURSE AND PROVIDED WITH INFERIOR MATERIALS THAN OF BASE COURSE
THE FUNDAMENTAL PURPOSE OF SUB “BASE IS TO PROVIDE A STRESS TRANSMITTING MEDIUM TO SPREAD THE SURFACE WHEEL LOADS IN SUCH A MANNER TO PREVENT SHEAR AND CONSOLIDATION DEFORMATIONS
FIBRE-REINFORCED FLYASH AS SUB-BASE
FLY ASH IS AN INDUSTRIAL WASTE MATERIAL FROM COAL PRODUCING INDUSTRIES
FLY ASH IS A LOW STRENGTH MATERIAL
STABILIZATION OF FLYASH BY ADDING FIBERS LIKE POLYPROPYLENE
MATERIALS USED
FLY ASH
FIBRE
SOIL
ADVANTAGES OF FIBRE-REINFORCED FLY ASH
FACTOR OF SAFETY OF REINFORCED MATERIAL IS INCREASED
STRENGTH OF FLY ASH INCREASED BY FIBRE REINFORCEMENT
REINFORCEMENT REDUCES THE VERTICAL DISPLACEMENT
SHEAR STRENGTH OF FLY ASH INCREASES DUE TO FIBRE REINFORCEMENT
RESULTS FROM EXPERIMENTS
THE UNCONFINED COMPRESSIVE STRENGTH OF FLY ASH IS INCREASED i.e. BRITTLE BEHAVIOR HAS BEEN CHANGED TO DUCTILE BEHAVIOR
THE CALIFORNIA BEARING RATIO IS INCREASED i.e. RESISTANCE AGAINST PENETRATION IS INCREASED
CONCLUSION
SHEAR STRENGTH OF FLY ASH INCREASES DUE TO FIBRE REINFORCEMENT
POLYPROPLENE FIBRE REINFORCEMENT REDUCES THE VERTICAL DISPLACEMENT
UCC STRENGTH,CBR VALUE OF FLY ASH IS INCREASED BY ADDING FIBRE