4.1. Compressive Strength
Table (6). Compressive Strength of the Prisms samples, was measured after periods of maturation in curing tan of water
Table (6)
|
Time |
Compression strength [N] |
|||
|
Test |
||||
|
100%Cem-II/A-L |
30% |
50% |
70% |
|
|
(42.5N) |
GGBS |
GGBS |
GGBS |
|
|
1 dzien |
20.1 |
11.9 |
6.3 |
2.8 |
|
2 dni |
31.7 |
22.0 |
13.4 |
8.3 |
|
7 dni |
44.1 |
41.6 |
34.5 |
28.9 |
|
28 dni |
55.2 |
58.8 |
58.1 |
48.1 |
|
56 dni |
57.3 |
65.6 |
66.0 |
62.0 |
|
Setting time |
178 |
203 |
217 |
255 |
|
(Mins) |
||||
Graph (1). Research of compressive strength test results of prisms samples:
The results have shown that, the increase in compressive strength of prisms samples containing GGBS after 56 days of ripening in tank water was significantly higher than other concrete made with 100% CEM II/A-L.
The highest compressive strength in the samples mixes was the samples containing 30% GGBS (65.6N) and 50% GGBS (66N).
Also the results have shown that the samples containing GGBS have higher setting time (203 ÷ 255min) than the 100% CEMII/A-L were was (178min).
4.2. Tensil Strength:
Table (7). Tensil Strength of the Prisms samples, were was measured after period of maturation in water
Table (7).
|
Termin Test |
Tensil strength, [N] |
|||
|
100%Cem-II/A-L |
30% |
50% |
70% |
|
|
(42.5N) |
GGBS |
GGBS |
GGBS |
|
|
28 day |
8.6 |
8.9 |
9.6 |
9.4 |
Graph (2). research of Tensil strength test results of prisms samples:
The results have shown that, the increase in tensile strength of prisms samples containing GGBS after 28 days of ripening in tank water was (8.9 ÷ 9.6N) significantly higher than other samples made with 100% CEM II/A-L were was (8.6N).
The highest tensile strength in the prisms mixes was the samples containing 50% GGBS (9.6N) and 70% GGBS (9.4N).
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