9. Strength test results of the air entrained concrete samples maturated in tank water:

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

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