method of statement for slab on grade

method of statement for slab on grade and Slab On Grade Construction

Summary: This Method of Statement includes the following;

I. All Slab on Grade

II. Approved Materials:

1. Polythene Sheets

2. Wire mesh

3. Seifban TC

1. Preparation and Installation Slab On Grade Footing

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A. Clean the area of any loose materials prior to start any work make sure that the compacted fill to received concrete is approved by the consultant Engineer.

B. Check the dimensions and elevations from the approved shop drawing.

C. Apply termite control according to manufacturer’s recommendation by using spray on the back filled soil to received concrete and follow the time limit as per manufacturer’s requirement. No pouring of water is allowed after treatment.

D. Place the vapor retarder sheeting (Polyethylene Sheets) with the longest dimension parallel with the direction of concrete.

E. Lap vapor retarder over footing or seal wall all around penetrations such utilities and columns in order to create a monolithic membrane between the surface of the slab and moisture sources below the slab at the slab perimeter.

F. Accurately install mesh reinforcement as required and firmly held a place before and after concrete. Provide lap joint 320 mm in the steel reinforcement. Arrange concrete spacer below reinforcement to provide 75 mm minimum concrete covering.

G. Install joint filler strips at slab junction with vertical surfaces, such as columns pedestal, foundation walls and grade beams.

H. Extend joint filler strips width and depth of joint, terminating flush with finished concrete surface.

I. Before placing concrete (24 MPa at 28 days, maximum slump 125 mm) verify that installation of form work, reinforcement and embedded items(Electra-Mechanical) is complete and that inspection request has been approved.

J. Provide cylinder sample fro concrete as required.

 2. Curing of slab on grade

A. Keep surfaces continuously moist for not less than seven days with water.

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