Abstract
Among all the transportation systems roadways is most commonly used transportation system. But in present scenario roads faces a lot of problems like potholes, cracks and many other distresses. Not even these but water is also the main enemy to the pavement which causes deformations and changes the texture of subgrade soil resulting in large variation in performance.The total Impervious Surface Change (ISC) in India for the decade 2000 to 2010 is 2274.62 km2. This is one of the most considerable problems due to rapid urbanization where there is a tremendous increase in construction of black topped and different types of impervious pavements. This has an adverse effect on the environment as the storm water becomes stagnant over the surface of the pavement due to inadequate drainage conditions.The necessity for reducing stagnation and the surface runoff has given the inception of pervious pavement surface. Pervious concrete pavement is a special type of its kind with high perviousness with no or minimal fines which allow water to percolate through it and thus the water which is accumulated over the surface can be collected and used for various purposes.The present work studied the mechanical properties and also the permeability of pervious concrete of mix 3:1 aggregate cement ratio. The control mix is altered by partially replacing 30% of cement with Ground Granulated Blast furnace Slag (GGBS), included Cellulose fibers of 5% of weight of the cementitious material and combination of both in one mix and compared the results obtained.The properties such as compressive strength, split tensile strength, flexural strength and permeability are assessed by performing tests. It was observed that there is an increase in Compressive Strength, Split Tensile Strength, Flexure Strength and decrease in the permeability in the altered pervious concrete mixes when compared to the Pervious concrete with no additives.
Highlights
Pervious or porous concrete is defined as “no-fines” concrete or open graded concrete which allows rain water to percolate to the sub-base through the pavement carriage way
The Split Tensile strength of mixes with Cellulose fiber, Ground Granulated Blast furnace Slag (GGBS) and both GGBS and Cellulose fiber are tabulated in table 4.4 and compared with that of the Pervious Concrete mix with no additives
The Compressive strength of mixes with Cellulose fiber, GGBS and both GGBS and Cellulose fiber are tabulated in table4.3 and compared with that of the Pervious Concrete mix with no additives
Summary
Pervious or porous concrete is defined as “no-fines” concrete or open graded concrete which allows rain water to percolate to the sub-base through the pavement carriage way. The principal ingredients are quite similar to conventional concrete. It differs mainly from the conventional concrete in the percentage of void space within pervious concrete. The most of the street roads are cement concrete roads which posses the strength more than they require as majority of the street roads carry considerably low volume. The black topped roads cannot be laid there as it requires more work space when compared to the cement concrete road and the cost of construction is high. The adequacy of the efficient management of storm water in an economical and environmental friendly manner is the frontline problem for all the planners, public works officials and developers. To investigate the properties of pervious concrete with GGBS, natural fibres like Cellulose and both. To conduct the necessary tests to assess the strength and permeability
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