ULTRA HIGH PERFORMANCE CONCRETE WITH ALCCOFINE 1203 M100 Grade Concrete – Report on its achievement Rahul Mathur Zonal Head (Delhi & UP) Customer support group
[email protected]
Report on Successful accomplishment of M100 grade concrete
Preamble In the first cycle we designed a Concrete mix to achieve a strength
of 100MPa by exploring various combinations of fines and microfines (Alccofine 1203 and Microsilica).
It was established that 100 MPa was achieved only when Alccofine
1203 was used (in fact it was 12% dosage).
In this cycle, which was second cycle, the objective was to optimize
the mix design and work for M100 grade.
We did reset the mix design but optimized the structure and
following changes were made – – – – –
W/c ratio was changed from 0.245 to 0.23 16mm aggregate CAI were reduced to 24% FA was increased by 3% of its earlier proportion Admixture dosage was increased to 2% All other things remained as earlier
The targeted flow was 750mm on flow table and 5 Sec in “V”
Funnel
Report on Successful accomplishment of M100 grade concrete
Trial Mix Results 1. Fresh Concrete Properties - Workability Trial No.
Grade of concret e
1
M100
Trial Type
100% Alccofine
Trial with SCC Parameters Admixtur Slump Flow e T50 Final PC
6 Sec
V Funnel Flow
“U” Tube flow
8 Sec
H1 = H2
800mm
Observations on Mix: 1. Fresh Mix was very cohesive but flowable 2. It was not sticky when Alccofine was used but as the dosage of Microsilica increased the stickiness also increased. 3. Matrix was quite integrated and no signs of surface bleeding or seggregation.
Report on Successful accomplishment of M100 grade concrete
… And Magical figure of 115MPa Age of Cube Strength in Mpa Avg. Weight of Cubes (Kg)
3d 75.24 8.4
7d 92.67 8.45
28d 115.24 8.40
Strength of cubes of M100 Grade Mix 140
Compressive Strength
120
115.24
100
92.67
80
75.24
60 40 8.45
8.4
20
8.40
0 3d
Age of Cubes
Strength in Mpa
7d
28d Avg. Weight of Cubes (Kg)
Report on Successful accomplishment of M100 grade concrete
Even one cube strength crossed 120MPa mark and was actually 120.5MPa We have now achieved M100 Grade exclusively with Alccofine 1203
Report on Successful accomplishment of M100 grade concrete
Conclusions High density of the mix was achieved and subsequently higher packing Cube failure pattern was dumb bell showing aggregate crushing
dominently The trial has established compatibility of PPC and
Alccofine to act simultaneously in the mix. Alccofine was used as cement substitute and since
fly ash was already present in PPC, no further addition was possible and hence not done. As far as cement is concerned, it can be established
that a strength of 100MPa with Ambuja PPC is now possible. The trial was made with the locally available
materials and so their capability in a concrete mix was also established. Report on Successful accomplishment of M100 grade concrete
