METHOD STATEMENT FOR THE CONSTRUCTION JOINT TREATMENT

by Tutorial Tips Civil · 02/15/2019

Scope: Methodology for the treatment of the construction joints.

Material:

Conbextra GP2/ Power Grout Flowable /Equivalent
Nitobond SBR Latex.
Cement.
Cebex 100.

Equipment:

Concrete cutter.
Pan.
Brush.
Trowel.

Methodology: The construction joint shall be inspected before the commencement of work, whether there is leakages observed or not through pond test. Following treatment, a procedure needs to adopt.

Case I: Construction joint treatment where leakages are not observed.

Surface thoroughly cleaned and made free from any loose, dust and slurries over them.
Identified construction joint should be saw cut / V notch to a depth of a minimum 20 mm and width of 15mm so that repaired patch should form a rectangular shape.
The surface to be prepared should be cleaned with water before carrying out repair work.
The prepared surface is in SSD condition, apply a coat of SBR Latex bonding agent /equivalent along with cement and water in a proportion of 1:3:1 by weight using a brush by scrubbing it well into the surface.
Power Grout (Flowable) / Conbextra Gp2 / Equivalent shall be applied on ‘V’ groove as per the technical data sheet.
The rectified surface should be cured properly.

Case II: Construction joint treatment where leakages were observed.

Surface thoroughly cleaned and made free from any loose, dust and slurries over them.
Identified construction joint should be saw cut / V notch to a depth of a minimum 20 mm and width of 15mm so that repaired patch should form a rectangular shape.
The surface to be prepared should be cleaned with water before carrying out repair work.
The prepared surface is in SSD condition, apply a coat of SBR Latex bonding agent /equivalent along with cement and water in a proportion of 1:3:1 by weight using a brush by scrubbing it well into the surface.
Power Grout (Flowable) / Conbextra Gp2 / Equivalent shall be applied on ‘V’ groove as per technical data.
Application of bonding agent like SBR Latex mixes with cement and water at the proportion of 1:3:1 by mass on the entire affected area 600mm on either side of the joint with requisite non-shrink additives (Cebex 100).
Curing is to be performed by making ponding for 7 days.
The treated construction joint is to be checked with a pond test.