|
Guide to the selection of designated and standard mixes
Extract from BS5328 Part 1, Table 13
|
|
Application |
Designated
mix |
Standard
mix |
Recommended workability
(nominal slump) |
|
Foundations |
|
Blinding
and mass concrete fill |
GEN
1 |
ST2 |
75 |
|
Strip
footings |
GEN
1 |
ST2 |
75 |
|
Mass
concrete foundations |
GEN
1 |
ST2 |
75 |
|
Trench
fill foundations |
GEN
1 |
ST2 |
125 |
|
General applications |
|
Kerb
bedding and barking |
GEN
0 |
ST1 |
Very
low (nominal 10) |
|
Drainage
works to give immediate support |
GEN
1 |
ST2 |
Very
low (nominal 10) |
|
Other
drainage works |
GEN
1 |
ST2 |
50 |
|
Oversite below suspended slabs |
GEN
1 |
ST2 |
75 |
|
Floors |
|
House
floors with no embedded metal (see note 1 of
5.3.3 of BS 5328: Part 2: 1997):
- Permanent finish to be added, e.g. a screed or floating
floor |
GEN
1 |
ST2 |
75 |
|
-
No permanent finish to be added, e.g. carpeted |
GEN
2 |
ST3 |
75 |
|
Garage
floors with no embedded metal |
GEN
3 |
ST4 |
75 |
|
Wearing
surface: light foot and trolley traffic |
RC
30 |
ST4 |
50 |
|
Wearing
surface: general industrial |
RC
40 |
N/A |
50 |
|
Wearing
surface: heavy industrial |
RC
50 |
N/A |
50 |
