ALWAYS ADVANCING PERVIOUS Pervious challenges Build tougher pavement
ALWAYS ADVANCING PERVIOUS Pervious challenges: Build tougher pavement. Build pavement that drains well.
INTRO David Mitchell Bunyan Industries Equipment manufacturer Allied with NRMCA and promoters of cement and ready mixed concrete System designs Hydrology Mixture variations
OBJECTIVES Evaluate the potential site and the owner site terrain geotechnical properties of site soils site precipitation flow in/out mixture design detention design landscape adjacent pavement traffic exposure to deicing salts
OBJECTIVES Educate the owner to expect: differences in storm water function porous surface texture award contracts based on experience tasks of guarding against deicing salts tasks of guarding from contamination tasks of prompt and proactive response tasks of monitoring infiltration rates tasks of regularly scheduled cleaning tasks of remedial extraction tasks of applying denisifiers and sealers
SITE CONDITIONS Permeability of soils at basin Permeability of soils at 15 ft depth Slope Elevation: slab section detention basin detention water at maximum Precipitation Potential inflow of water / silt Discharge limits & fees for outflow
PERIMETER CURB .
SLOPE .
ADJOINED TO ASPHALT .
CHECK DAM .
ALTERNATE VENTS Multi-layered pavement can reach multiple objectives.
TREE WELLS
EXPOSED EDGE
FILTER FABRIC Examine a sample of detention aggregate that is infiltrated with water. Silt can develop clogging on the fabric surface.
WATERS Water of convenience Water of necessity
WET, METALLIC SHEEN Structure Bridge formation Absorption
WET, METALLIC SHEEN Structure Bridge formation Absorption
PARTICLE PACKING Particle sizes: cement slag coal ash silica fume nano silica Entrained air Paste density
MOIST CURE Surface Exposure Wind Relative humidity
MOIST CURE Fog Evaporation inhibitor Curing compound Poly sheeting
Super Absorbent Polymer
Thanks.
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