Table [11]. Test results of the sample compressive strength, were was measured after periods of maturation in water
Summary – compressive strength of concrete samples ripened in tank water
Table [11]
| 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 |
15.4 |
12.7 |
7.2 |
4.4 |
|
7 day |
28.1 |
27.5 |
24.9 |
21.6 |
|
28 day |
43.1 |
42.6 |
40.9 |
38.9 |
|
56 day |
45.6 |
48.0 |
48.8 |
43.2 |
|
90 day |
47.1 |
50.7 |
51.2 |
45.0 |
|
120 day |
47.6 |
52.4 |
53.6 |
46.3 |
Graph(4) – course of research test results of compressive strength for not aerated concrete samples
The results have shown that, the increase in compressive strength of not aerated concrete samples containing GGBS after 120 days of ripening in tank water was significantly higher than other of not aerated concrete made with 100% CEM II/A-L where was (47.6N).
The highest compressive strength in the concrete mixes was the samples containing 30% GGBS (52.4N) and 50% GGBS (53.6N).
6.2. Tensile Strength not aerated concrete
Table [12]. The tensile strength test results of not aerated concrete, were was measured after periods of 120 days ripening in tank water
Summary –Tensile Strength of concrete samples ripined in tank water
Table [12]
| 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 |
3.2 |
2.5 |
1.3 |
0.7 |
|
7 day |
4.1 |
3.6 |
3.3 |
2.7 |
|
28 day |
6.2 |
6.4 |
5.9 |
5.8 |
|
56 day |
6.5 |
6.9 |
7.0 |
6.3 |
|
90 day |
6.7 |
7.3 |
7.6 |
6.8 |
|
120 day |
6.8 |
7.5 |
7.9 |
7.1 |
Graph(5) – course of research test results of tensile strength for not aerated concrete samples
The results have shown that, the increase in tensile strength of not aerated concrete samples containing GGBS after 120 days of ripening in tank water was (7.1 ÷ 7.9N) significantly higher than other not aerated concrete made with 100% CEM II/A-L were was (6.8N) .
The highest tensile strength in the concrete mixes was the samples containing 50% GGBS (7.9N).
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