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Historic Preservation - Technical Procedures

Spectitle:

Removing And Replacing Deteriorated Concrete Paving

Procedure code:

0373203R

Source:

Hsr - Icc Bldg/Wash, Dc - Grier, Brown, Renfrow Architects

Division:

Concrete

Section:

Concrete Repair

Last Modified:

02/24/2012

Details:

Removing And Replacing Deteriorated Concrete Paving



REMOVING AND REPLACING DETERIORATED CONCRETE PAVING


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on replacing damaged
         sections of concrete paving.

    B.   See 01100-07-S for general project guidelines to be
         reviewed along with this procedure.  These guidelines
         cover the following sections:

         1.   Safety Precautions

         2.   Historic Structures Precautions

         3.   Submittals

         4.   Quality Assurance

         5.   Delivery, Storage and Handling

         6.   Project/Site Conditions

         7.   Sequencing and Scheduling

         8.   General Protection (Surface and Surrounding)

         These guidelines should be reviewed prior to performing
         this procedure and should be followed, when applicable,
         along with recommendations from the Regional Historic
         Preservation Officer (RHPO).

1.02 PROJECT/SITE CONDITIONS

    A.   Environmental Requirements:  Maintain a constant
         temperature of 45 degrees F. or above for at least 48
                   hours prior to placing concrete.


PART 2---PRODUCTS

2.01 MATERIALS

    A.   Portland cement

    B.   Aggregate

    C.   Clean, potable water

    D.   Polyethylene moisture barrier

    E.   Moisture-retaining cover such as waterproof paper,
         polyethylene film or polyethylene-coated burlap

    F.   Expansion joint material such as cork strips

2.02 EQUIPMENT

    A.   Spade

    B.   Mechanical vibrating equipment

    C.   Stiff bristle brushes

    D.   Straight edge

    E.   Bull float or darby


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Remove deteriorated sections of paving to edge of sound
         pavers and down to structural slab.

    B.   Remove dirt and debris from surface to receive new
         concrete.

    C.   Cut and fit polyethylene moisture barrier to cover the
         area to receive new concrete.

    D.   Position expansion joint material at edges of floor slab
         as required.

    E.   Lay concrete in layers.  DO NOT allow the concrete to
         harden before placing the next layer.

         1.   Consolidate concrete while laying by hand spading,
              rodding or tamping along with using mechanical
              vibrating equipment.

         2.   Work concrete thoroughly into corners.

    F.   Fill area flush with adjacent sound concrete and level
         with a straight edge.

    G.   Smooth the surface with a bull float or darby to
         eliminate humps or hollows.

    H.   Finish surface to match adjacent paving.

3.02 ADJUSTING/CLEANING

    A.   Protect newly placed concrete from excessive hot and cold
         temperatures.  Cover with moisture-retaining cover while
         curing.  Lap ends at least 3 inches and seal with
         waterproof tape or adhesive.

    B.   Allow to cure for a minimum of 7 days.

                         END OF SECTION