A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental and Statistical Analysis of Internally Cured Concrete Pavement under Loading
The conventional approach of external curing is limited as the whole three-dimensional microstructure of concrete does not cure and saturated. In external curing, only the concrete surface that is being wet cures and the concrete interior remains unsaturated. External curing challenges is further exacerbated due to the unavailability of modern equipment and skilled labor required to ensure proper concrete mixture. This ultimately affects the concretes durability and strength. This study attempts to evaluate the effect of internal curing of concrete for rigid pavements. Fine aggregates were pre-wetted in drums for a period of 7, 10 and 14 days. The fine aggregates used without pre-wetting served as the control sample. The concrete mix design to achieve a concrete grade of 40 N/mm2 was done according to Road Note 4 methodology with WC 0f 0.45. One hundred and twenty (120) cubes of 150 mm by 150 mm were cast and tested. The samples were tested after 7, 14, 21, 28 and 56 days. The concrete's compressive strength, elemental composition and microstructure before and after internal curing were evaluated using universal testing machine (UTM), x-ray spectrometer (XRS), and scanning electron microscopy (SEM) respectively. Central composite approach was used for statistical analysis and modeling of the concrete behavior. The results show that pre-wetted aggregates for 7, 10 and 14 days had 60.05, 59.33 and 57.07 N/mm2 respectively while the control sample had 57.05 N/mm2. The study conclude that fine aggregates should not be internally cured beyond 10 days to enhance mechanical properties.
Experimental and Statistical Analysis of Internally Cured Concrete Pavement under Loading
The conventional approach of external curing is limited as the whole three-dimensional microstructure of concrete does not cure and saturated. In external curing, only the concrete surface that is being wet cures and the concrete interior remains unsaturated. External curing challenges is further exacerbated due to the unavailability of modern equipment and skilled labor required to ensure proper concrete mixture. This ultimately affects the concretes durability and strength. This study attempts to evaluate the effect of internal curing of concrete for rigid pavements. Fine aggregates were pre-wetted in drums for a period of 7, 10 and 14 days. The fine aggregates used without pre-wetting served as the control sample. The concrete mix design to achieve a concrete grade of 40 N/mm2 was done according to Road Note 4 methodology with WC 0f 0.45. One hundred and twenty (120) cubes of 150 mm by 150 mm were cast and tested. The samples were tested after 7, 14, 21, 28 and 56 days. The concrete's compressive strength, elemental composition and microstructure before and after internal curing were evaluated using universal testing machine (UTM), x-ray spectrometer (XRS), and scanning electron microscopy (SEM) respectively. Central composite approach was used for statistical analysis and modeling of the concrete behavior. The results show that pre-wetted aggregates for 7, 10 and 14 days had 60.05, 59.33 and 57.07 N/mm2 respectively while the control sample had 57.05 N/mm2. The study conclude that fine aggregates should not be internally cured beyond 10 days to enhance mechanical properties.
Experimental and Statistical Analysis of Internally Cured Concrete Pavement under Loading
Gana, Abu James. (author) / Ajayi, Joseph A. (author) / Ariyo, Adanikin (author) / Owoeye, Victor Adewale (author) / Olajide, Opeyemi (author) / Aladegboye, Oluwasegun (author)
2024-04-02
4370420 byte
Conference paper
Electronic Resource
English
| British Library Online Contents | 2016
| Springer Verlag | 2015