Open AccessSelf-Compaction concrete behaviour containing nano fly ash used in rigid pavement
Author(s) -
Dhiaa Neama Jabbar,
Abdulhadi Meteab Hasan,
Mohammed Kareem Abed
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/779/1/012018
Subject(s) - fly ash , cement , compressive strength , slump , compaction , materials science , pozzolan , ultimate tensile strength , composite material , properties of concrete , concrete slump test , nano , geotechnical engineering , engineering , portland cement
As cement production causes 7% to 8% of global carbon dioxide emissions, many efforts have been made to reduce the consumption of cement. Using pozzolan (usually fly ash) as additional material with cement is one of these methods. In this paper, the impact of adding Nano fly ash as a partial substitution of cement weight was studied in self-compacting concrete for rigid pavement. Three replacement ratios were used which are (5,10 and 15) % of cement weight. The results showed that the greater substitution ratio gave better workability with higher d slump flow value and better passing ability of concrete. Also, the use of Nano fly ash improved the mechanical properties of the self-compacting concrete by increasing the compressive and splitting tensile strength. The best increase in the strength at the replacement ratio (10%) of cement weight. The slump flow for concrete mixes is between (658 to 732) mm and the compressive strength was improved with the increase of Nano fly ash replacement (10%) by about (20%) compared with conventional concrete. The rigid pavement strength able to provide a surface of good riding quality.