A common construction sequence is to place curb and gutter using metal form s then pave the roadway be t w een the opposite gutters.
How to form concrete curb and gutter.
Excavate the area for the curb and gutter with a shovel or mechanical excavator to 1 foot deep to allow a 5 or.
Once the subgrade is prepared the stringline is up and sensors are connected slipforming begins.
Remove the spacers and fill those joints with concrete mortar.
The concrete in the gutter is finished with a finishing tool that makes indentations wherever spacers were placed in the curb form.
When metal forms are used then division plate is utilized to form contraction joints.
Build the forms with 2 by 12 boards for the back of the curb and 2 by 6 boards for the front of the curb and.
The gutters serve as edge f o r ms for the pavement.
After the concrete has set remove the front curb board and smoothen the curb and gutter surfaces with the help of special concrete finishing tools.
Ready mix trucks deliver concrete to the slipform hopper where it is gravity fed and vibrated into the curb and gutter form.
Commonly concrete gutter might suffer from shrinkage and hence develop cracks.
Automatic sensors connected from the paver to a reference stringline control the line grade and slope of the curb and gutter.
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If the gutter and the curb are integral the contraction joints shall be extended into the curb.