A Vision To Clear Solutions.
v Minimum thickness of slab is 125mm
v Water absorption should not be more than 15%
v Dimension tolerance for cubes +-2mm
v Compressive strength of bricks is 3.5 N/mm2
v Maximum Free fall of concrete allowed is
1.50m
v In soil filling as per IS code for every
100sqm 3 sample for core cutting test should be taken
v Electrical conduits shall not run in column
v Earth Work Excavation for basement above 3m
should be stepped form
v
Any back
filling shall be compacted 95 % of dry density at the optimum moisture content
and in layers not more than 200mm for filling above structure and 300mm for no
structure.
v F
soling is specified the soling stones shall be laid at 45 degree to 60 degree inclination
(and not vertical) with interstices filled with sand or moorum.
v A set of cube tests shall be carried out for
each 30 cum of concrete/each levels of casting /each batch of cement.
v Water cement ratio for different grades of concrete
shall not exceed 0.45 for M20 and above and 0.50 for M10/M15 contractor.
v For concrete grades M20 and above approved
admixture shall be used as per mix design requirements.
v
Cement shall
be stored in dry places on a raised platform about 200mm above floor levek and
300mm away from walls.3 cubes each at 7 days and 28 days shall be tested for
compressive strength. The test results should be submitted to engineer for
approval.If results are unsatisfactory necessary action/rectification/remedial
measures has to be exercised.
Cement Shall be tested for its Setting.
·
The Initial
setting time shall not be less than 30 minutes,
·
The Final
Setting time shall not be more than 10 Hours.
Slump as Per IS 456
§ Lightly reinforced 25-75mm
§ Heavily reinforced 75-100mm
§ Trench fill (Insitu & termite) 100-150mm
(for tremie no need of vibrator)
Curing Days Required:
Super
Sulphate Cement: 7 Days
Ordinary
Portland cement OPC:10 Days
Minerals and
admixture added cement:14 Days
Cube Samples:
1 – 5 M3 :1
No
6- 15M3 :2
No’s
16-30 M3 : 3
No’s
31-50 M3 : 4
No’s
Above 50
M3:4+1 No of addition sample for each 50 M3
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