Cement Grout Mix Design With Fosroc Cebex 100 Admixture and OPC 43 Cement
Cement grout is a
mixture of cement, water, with or without aggregate and with or without
admixture.
Cement grout is used for crack repairing, filling the voids of Post-Tensioned cable in prestressed concrete bridges etc.
STIPULATIONS FOR PROPORTIONONG
|
Type
of Mix |
:
Cement Grout |
|
Type
of Cement |
:
OPC-43 |
|
Maximum
water cement Ratio |
:
0.45 (As Per MORT&H 5th Rev. Appendices-1800/III |
|
Degree
of supervision |
:
Good |
|
Admixture |
:
Fosroc Cebex 100 |
|
MATERIAL |
DESCRIPTION |
SOURCE |
BATCH NO/WEEK NO |
|
Cement |
OPC-43 |
Ramco cement |
40/2018 |
|
Water |
- |
Bore Water |
- |
|
Admixture |
Cebex 100 |
Fosroc Chemicals (India) Pvt.Ltd. |
IN1MF00407003K |
SELECTION OF WATER-CEMENT RATIO
As per Admixture recommended Dosage,
adopted water-cement ratio = 0.41 ≤0.45 (As Per
MORT&H 5th Rev. Appendices-1800/III Clg.4.1)
|
OPC |
Concreting
Sand |
Water |
Cebex 100 |
Approx. Yield |
|
50 Kg |
- |
20-22 litres |
225 gm |
36 litres |
|
50 kg |
50 kg |
22-24 litres |
225 gm |
57 litres |
|
Note:
For grout, mortar or concrete mixes with an aggregate/cement ratio more than
1, 4 x 225 g units of Cebex 100 per 100 kg of cement, shall be used. |
||||
DESIGN CALCULATION
|
Cement Content |
: |
50 |
kg |
W/C = 0.41 Then, Water = 0.41 x Cement |
|
Water-Cement ratio |
: |
0.41 |
|
|
|
Water Content |
: |
20.50 |
kg |
|
|
Admixture Quantity |
: |
0.225 |
kg |
MIX PROPOTIONS FOR TRIAL
|
Cement Content |
: |
15 |
kg |
|
Water-Cement ratio |
: |
0.41 |
|
|
Water Content |
: |
6.150 |
kg |
|
Admixture Quantity |
: |
67.50 |
gm |
TRIAL MIX OBSERVATION
No of
Cube Casted= 9 nos
1. Bleeding = Not Found (Not exceed 0.3% of vol. of the initial
vol. of grout As Per MORT&H 5th Rev.
Appendices-1800/III Clg.4.2)
2. Initial
Setting Time = 10 Hours (More than 3 hours
& less than 12 hours As Per MORT&H 5th Rev. Appendices-1800/III Clg.4.2)
3. Final
Setting Time = 25 Hours (Not less than 24 hours As Per MORT&H 5th Rev.
Appendices-1800/III Clg.4.2)
4. Volume
Change = 3.7 % (1% to 5% As Per MORT&H 5th Rev. Appendices-1800/III Clg.4.2)
5. 7
Days Compressive Strength = 27.54 N/mm2 (Not less than 27 N/mm2 As Per MORT&H 5th Rev.
Appendices-1800/III Clg.4.2)
6. 28
Days Compressive Strength = 36.66 N/mm2 (Not less than 30 N/mm2 As Per MORT&H 5th Rev.
Appendices-1800/III Clg.4.2)
************ The End**********
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