Class F of fly ash and concrete properties
Session
Civil Engineering, Infrastructure and Environment
Description
This paper report the consistency, workability, setting time, shrinkage, high and ordinary compressive strength of concrete containing different percentage of fly ash as Portland cement substitution. The results show that the water requirement for keeping constant consistency in different mixes was increased lightly by increasing fly ash content while it effect to prolong initial and final setting time. Workability was increased by increasing fly ash content, measured by slump, but consequently it effect to decrease strength in both cases, ordinary and high strength of concrete. However, it must be noted that the objective of designing of ordinary and high strength concrete (C 25/30 and C 50/60) was achieved by 20% substituent of Portland cement. Meanwhile, the expansive property of fly ash contributed to reduce drying shrinkage. To develop this research, 12 different mix designs were prepared, starting with 10% fly ash content until 30% of cement replacement and in total more than 270 specimens underwent on testing procedures during different period of curing time.
Keywords:
fly ash, ordinary and high performance concrete, compressive strength, shrinkage.
Session Chair
Hazir Çadraku
Session Co-Chair
Visar Krelani
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-550-19-2
Location
Pristina, Kosovo
Start Date
26-10-2019 3:30 PM
End Date
26-10-2019 5:00 PM
DOI
10.33107/ubt-ic.2019.219
Recommended Citation
Alaj, Anjeza and Numao, Tatsuya, "Class F of fly ash and concrete properties" (2019). UBT International Conference. 219.
https://knowledgecenter.ubt-uni.net/conference/2019/events/219
Class F of fly ash and concrete properties
Pristina, Kosovo
This paper report the consistency, workability, setting time, shrinkage, high and ordinary compressive strength of concrete containing different percentage of fly ash as Portland cement substitution. The results show that the water requirement for keeping constant consistency in different mixes was increased lightly by increasing fly ash content while it effect to prolong initial and final setting time. Workability was increased by increasing fly ash content, measured by slump, but consequently it effect to decrease strength in both cases, ordinary and high strength of concrete. However, it must be noted that the objective of designing of ordinary and high strength concrete (C 25/30 and C 50/60) was achieved by 20% substituent of Portland cement. Meanwhile, the expansive property of fly ash contributed to reduce drying shrinkage. To develop this research, 12 different mix designs were prepared, starting with 10% fly ash content until 30% of cement replacement and in total more than 270 specimens underwent on testing procedures during different period of curing time.