EXPERIMENTAL STUDY ON BEHAVIOUR OF RIGID PAVEMENT USING SODIUM BENTONITE BY ROLLER COMPACTION METHOD
Keywords:
Sodium Bentonite, Rigid pavement, Roller compaction, Roller compacted concrete pavement, Compressive strengthAbstract
The increasing demands to recede the amount of CO2 liberation from construction industries or fields has
led to the development of various cementitious materials. These materials were incorporated in concrete making it
inexpensive and eco-friendly without compromising on the mechanical properties of the concrete. Sodium Bentonite,
a mineral admixture of this sort, is used as a replacement by weight of cement in designing a roller compacted
concrete pavement. Soil compaction method is used to determine the optimum moisture content of various mix
proportions. Cylinders were cast with cement percentages 10%, 15% and 20% varying with bentonite percentages of
0% and1% by using roller compaction. Compressive strength is evaluated for 3, 7 and 28 days. Test results stated that
15% of cement had achieved significant compressive strength for the conventional mix at 28 days. Though 20% of
cement with 1% of bentonite and 15% of cement with 1% of bentonite has achieved significant strengths, 15% of
cement with 1% of bentonite is considered as optimum mix proportion because of the rheology of this mix closer to a
roller compacted concrete pavement.
