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 MyMason's Case Studies

 Fireplace Case Studies

    Nakkertok Fireplace Surrounds

    Fireplace Surround - Old Wood to New Wood Insert

    Fireplace Surround - Old Wood to New Wood Insert

    Fireplace Fire Brick Replacement

    Fireplace Surround - Natural Stone

    Electric, Natural Stone Fireplace

    Fireplace Hearth Replacement

    Stone Fireplace

    Cultured Stone Fireplace & New Framing

    Cultured Stone Fireplace Surround

    TV Mounted on Stone Fireplace

    Restructuring Fireplace: Wood to Gas

    Drywall to Stone Fireplace

    3-sided fireplace: Cultured Stone

    Fireplace Removal, Damper Removal

 
 Chimneys and Brickwork Case Studies

    Chimney Repair

    Chimney Repair, Articulated Boom

    Custom Scaffold, Chimney Repair

    Lower-Chimney's Removal, Wall Restructuring

    Chimney Flue Replacement

    Concrete Chimney Cap as per Building Code

    Chimney - Sloped Side, Repair

    Chimney - Wobbly Chimney

    Brick Pillar

    Brick Garage Pillar Repair

    Window's Lintel Installation

    Brick Sill Creates Wall Damage

    Brick-to-Stone Window Sill Replacement

    Brick Retaining Wall Rebuild

 
 Stone Work Case Studies

    Stone Wall Rebuild

    Granite Resurfacing of Concrete Stairs

    Stone Step Rebuild

    Stone Stair Rebuild - in Winter

    Stone replaces Brick Door Sill

    Stone Retaining Wall Rebuild

    Dry-Stack Retaining Wall Rebuild

    Dry-Stack Stone Retaining Wall

    Flagstone Patio Rebuild, Expansion

    FlagStone Step Repair

    Stone Replacement

    New Interlocking Stone Walkway

    Re-setting Interlocking Walkway

    Tile Installation

 
 Algonquin College/MyMason Case Studies

    Cold Weather Masonry Rules

    3 New Cases Studies in 2015

    Salt and Concrete Testing

    Concrete Curing Stress Tests

    Concrete and Rebar Stress Tests

 
 Parging Case Studies

    Parging, Cement Board

    Parging Examples & Techniques

 
 Concrete Case Studies

    Broken Concrete Step

    Basement Window, Concrete Cut

    Basement Window, Concrete cut-out

    Concrete Walkway, Landing

    Concrete Stairs and Landing

    Concrete Stairs and Landing

    Concrete Countertop

 

 

 

    Case Study: Concrete Walkway, Landing

 
        Before and After

   

 
    The Assignment:
        Remove the existing walkway and landing, which were broken.
        Build a deep base, reinforce the concrete.

 

 
Removing the Old, completely.
A full day of digging excavated the trench. At least eight inches deep, it has a hard bottom.

In the trench you can faintly see the steel wire mesh, measured and cut to fit in advance.

 
Forms
Concrete can give you any shape.
The foreground shows a dozen rebar rods.

 
3/4" Gravel
A thick, high-quality, landscaping cloth lines the trench.
Four inches of 3/4" gravel will provide drainage and stability.

 

 

 

Concrete
Steel wire mesh is sandwiched in the middle of the concrete.
Rebar rods are used liberally along with the mesh.
The concrete was ordered drier and consequently stronger, at a slump of 4.
Shaping the concrete
Screeding the concrete, working a straight edge across the form, starts the leveling process.

A magnesium float is used to prepare the surface.
A wood float is used next for a smooth surface.
An 'edging tool' rounds the edges, making them less likely to chip.

Finishing work
Masonry involves having a feel for concrete.
It is a time-sensitive substance that can be handled poorly.
Before the work begins, platforms have to be considered.
Ready to cure
Within 8 hours the walkway began being watered, to slow the cure, increase strength. 85 percent of the cure occurs in 48 hours, most of that in twelve hours. Concrete takes a month to cure fully, and can be slowed with water, cooler temperatures.
Done!
A good base, lots of reinforcing, built to last.

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This page last modified: May 20 2010