9.1. compressive strength
Table [20]. compressive strength test results of the air entrained concrete samples, where was measured after periods of ripining in tank water
Summary – Air Entrained Concrete Compression Strength ripened in
Tank water
Table [20]
| W/C = 0.45 |
CEM II/A-L |
CEM II/GGB | CEM II/GGBS | CEM II/GGBS |
|
% |
100 |
70/30 |
50/50 |
30/70 |
|
2 day |
11.1 |
10.4 |
8.9 |
6.6 |
|
7 day |
24.2 |
22.9 |
21.2 |
18.4 |
|
28 day |
38.6 |
37.7 |
36.0 |
32.2 |
|
56 day |
40.8 |
41.5 |
41.4 |
36.7 |
|
90 day |
41.3 |
43.6 |
42.7 |
38.0 |
|
120 day |
41.4 |
44.3 |
43.8 |
39.1 |
Graph(13) – Research results of compression strength tests for air entrained concrete samples
The results have shown that, the increase in compressive strength of air aerated concrete samples containing GGBS after 120 days of ripening in tank water was significantly higher than other of air aerated concrete made with 100% CEM II/A-L where was (41.4N).
The highest compressive strength in the concrete mixes was the samples containing 30% GGBS (44.3N) and 50% GGBS (43.8N).
9.2. Tensil Strength
Table [21]. The Results of air entraind concrete tensile strength , where was measured after periods of maturation in tank water
Summary – Concrete Tensil Strength ripend in tank water
Table [21]
| W/C = 0.45 |
CEM II/A-L |
CEM II/GGB | CEM II/GGBS | CEM II/GGBS |
|
% |
100 |
70/30 |
50/50 |
30/70 |
|
2 dni |
2.6 |
2.4 |
1.7 |
1.2 |
|
7 dni |
4.7 |
4.3 |
3.9 |
2.9 |
|
28 dni |
6.1 |
6.3 |
5.7 |
4.8 |
|
56 dni |
6.3 |
6.6 |
6.2 |
5.5 |
|
90 dni |
6.2 |
6.7 |
6.5 |
5.8 |
|
120 dni |
6.2 |
6.8 |
6.6 |
6.0 |
Graph(14) – Research results of tensil strength tests for air entrained concrete samples
The results have shown that, the increase in tensile strength of air entrained concrete samples containing GGBS after 120 days of ripening in tank water was (6.6 ÷ 6.8N) significantly higher than other air entrained concrete made with 100% CEM II/A-L where was (6.2N).
The highest tensile strength in the concrete mixes was the samples containing 30% GGBS (6.8N).
Professor Pawel Lukowski. Head of the Department of Building Materials Engineering. Warsaw University of Technology
Dr. Eng. Joanna Julia Sokolowska. Department of Building Materials Engineering. Warsaw University of Technology
MSc. Eng. Ali Salih Technical and Quality Manager – Casey Concrete, Gorey Co. Wexford
Part I – DURABILITY OF CONCRETE CONTAINING GGBS IN EXPOSED TO FREEZING AND THAWING CONDITIONS
1- Abstract 2. Background 3. Prisms analysis of cement samples (MORTARS) 4. Test results of the Prisms 5. Test on Without Air Entrained concrete samples: 6. Strength test results 7. Durability Test
Part II – DURABILITY OF CONCRETE CONTAINING GGBS IN EXPOSED TO FREEZING AND THAWING CONDITIONS
8. Air Entrained Concrete 9. Strength test results of the air entrained concrete samples maturated in tank water 10. Durability Test 11. Conclusions of the study/a> 12. Literature