Discussion: View Thread

  • 1.  Role of deposited sand particles in affecting the strength of roads

    Posted 08-16-2018 11:13 AM
    Edited by Tirza Austin 08-16-2018 11:13 AM
    What role does deposited sand play in affecting the strength of roads?

    ------------------------------
    Ashutosh Kumar
    Bachelor in civil engineering
    7654648809
    Patna,India
    ------------------------------


  • 2.  RE: Role of deposited sand particles in affecting the strength of roads

    Posted 08-23-2018 01:50 PM

    The materials used in the structural section of roads and in general the construction of roadways are a function of the anticipated traffic loads and the type of supporting soil used as bedding and backfill material.  The thickness of the structural section depends on the selection of the construction material used in the top layer such as asphaltic concrete (AC), portland cement concrete (PCC) etc.  The layer below the AC or PCC known as the base course may consist of permeable material as sand that will act as a medium to drain any moisture away from the top layer and into the groundwater under the force of gravity assuming that the soil is still permeable past the roadway structural section.  Roadways are designed to carry traffic loads and so if a temporary condition such as sand is deposited directly on an existing roadway, the condition of the roadway should not be impacted if the existing roadway surface is adequate to carry traffic loads (no alligator cracks, potholes etc.).  The ensuing problem will be the maneuverability of construction equipment placing, moving and removing the sand deposited.  The constant movement of the equipment may damage the wearing surface and the base course. 



    ------------------------------
    Spiridon Lazaris MPA, MCE, P.E., ENV SP, M.ASCE
    President
    Spiros Lazaris Engineered Solutions
    Westlake Village CA
    (818)268-3917
    ------------------------------

    Original Message


  • 3.  RE: Role of deposited sand particles in affecting the strength of roads

    Posted 08-25-2018 02:33 PM
    Edited by Tirza Austin 08-25-2018 02:33 PM
    Get a state dept. of transportation road design standards book such as VA or NC. They will have standard designs used with  base and subbase materials underlying bituminous concrete or regular con.(rarely used currently.) Sand is good as it facilitated subdrainage drainage and does not retain water as base with high clay fraction.


    ------------------------------
    Martin Lane P.E., M.ASCE
    RETIRED
    Richmond VA
    (804) 282-8035
    ------------------------------

    Original Message


Related Content