|
Comparison
of site-mixed concrete and RMC |
| |
Site-mixed
concrete |
RMC |
| 1.
Production |
| Raw
Material |
Required
near mixer |
At
Batching Plant |
| Weigh
Batching |
Manually
(appx. qty.) |
Computerised |
| Adjustment
for Moisture |
Approximate |
Computerised |
| Water
Cement Ratio |
Manually
(appx) |
Computerised |
| Admixture
dose |
Manually
(appx) |
Computerised |
| Mixing |
Tilting
Mixers |
Turbo
Mixers |
| Mixing
Time |
Approximate |
Auto
Timer |
| Batch
Size |
140
litres |
1000
litres |
| Discharge |
Platform |
Transit
Mixer / Pump |
| Rate |
3Cu
M / hr / mixer |
56Cu
M / hr / plant |
| 2.
Quality |
| Degree
of control |
Fair |
Very
good |
| Yield |
Variable |
Consistent |
| Testing
of fresh concrete |
Once
/ 25 batches |
Each
Batch |
| 3.
Raw Materials |
| Selection
/ Sourcing |
Client
/ Consultant |
Concrete
Supplier |
| Testing |
Client
/ Consultant |
Concrete
Supplier |
| Storage |
Multi
Locational |
Single
Point |
| Space
Requirement |
Large |
Limited
Area |
| 4.
Delivery |
| |
Manual
with mixers placed near the Pour / Hoist / Crane |
Transit
mixer (to the site) |
| 5.
Placing |
| Mode |
Manual
/ Hoist / Crane
|
Concrete
Pump |
| Rate |
1.5Cu
M / hr |
As
per requirement upto
56Cu M / hr |
| 6.
Time Frame |
| Foundations |
100Cu
M / day |
upto 500Cu M / day |
| Columns
/ Slab |
70Cu
M / day |
upto
200Cu M / day |
| Note
: Above value for RMC are for a typical 56Cu M / hr plant |
