TY - JOUR
T1 - Utilization of cashew nut-shell ash as a cementitious material for the development of reclaimed asphalt pavement incorporated self compacting concrete
AU - Tantri, Adithya
AU - Nayak, Gopinatha
AU - Kamath, Muralidhar
AU - Shenoy, Adithya
AU - Shetty, Kiran K.
N1 - Funding Information:
The authors are thankful to the Department of Civil Engineering, Manipal Institute of Technology, MAHE, Manipal, Karnataka, India. The authors also express gratitude to Dr.Murari M S, Scientific Officer, DST-PURSE Program, Mangalore University who facilitated us to perform FE-SEM and EDS. Also, extend our thanks to the department of chemical engineering and DAMP Manipal Institute of Technology for TGA, FTIR, and XRD facilities. Lastly appreciativeness to Advanced Facility for Microscopy and Microanalysis, IISC, Banglore, India for X-ray micro-Computed-Tomography (?CT) (Xradia, XCT-500) facility.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/9/27
Y1 - 2021/9/27
N2 - This paper focuses on developing sustainable self-compacting concrete (SCC) through the optimization process by incorporating Reclaimed Asphalt Pavement (RAP) as coarse and fine aggregates and also utilizing Cashew Nut-shell Ash (CNA) as a cementitious material. To achieve this optimization technique is implemented in four stages, which are the RAP aggregate treatment process, gradation selection process, RAP replacement percentage, and considering the CNA replacement percentage. RAP has been treated by a novel freeze–thaw cyclic procedure followed by the abrasion treatment method. Bailey's Aggregate Grading Technique (BAGT) has been implemented to line up the aggregate packing gradation. Mechanical and rheological properties have been conducted and analyzed based on compliance requirements of SCC at ambient temperature. Paste properties are analyzed through Field Emission Scanning Electron Microscopy, X-ray diffraction, Energy-Dispersive-Spectroscopy, and Thermo Gravimetric Analysis. Further, quality assessment of SCC has been performed through X-ray μCT (Xradia, XCT-500) and Ultrasonic Pulse velocity tests. In addition, compressive and flexural strength of selected SCC mixes have been performed at 50 °C, 100 °C, and 150 °C. Based on the results, with the incorporation of 75% coarse RAP, 50% fine RAP along 15% CNA as a binder constituent it becomes possible to achieve a sustainable SCC and it was found to be most suitable for real-time practices.
AB - This paper focuses on developing sustainable self-compacting concrete (SCC) through the optimization process by incorporating Reclaimed Asphalt Pavement (RAP) as coarse and fine aggregates and also utilizing Cashew Nut-shell Ash (CNA) as a cementitious material. To achieve this optimization technique is implemented in four stages, which are the RAP aggregate treatment process, gradation selection process, RAP replacement percentage, and considering the CNA replacement percentage. RAP has been treated by a novel freeze–thaw cyclic procedure followed by the abrasion treatment method. Bailey's Aggregate Grading Technique (BAGT) has been implemented to line up the aggregate packing gradation. Mechanical and rheological properties have been conducted and analyzed based on compliance requirements of SCC at ambient temperature. Paste properties are analyzed through Field Emission Scanning Electron Microscopy, X-ray diffraction, Energy-Dispersive-Spectroscopy, and Thermo Gravimetric Analysis. Further, quality assessment of SCC has been performed through X-ray μCT (Xradia, XCT-500) and Ultrasonic Pulse velocity tests. In addition, compressive and flexural strength of selected SCC mixes have been performed at 50 °C, 100 °C, and 150 °C. Based on the results, with the incorporation of 75% coarse RAP, 50% fine RAP along 15% CNA as a binder constituent it becomes possible to achieve a sustainable SCC and it was found to be most suitable for real-time practices.
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U2 - 10.1016/j.conbuildmat.2021.124197
DO - 10.1016/j.conbuildmat.2021.124197
M3 - Article
AN - SCOPUS:85111503243
SN - 0950-0618
VL - 301
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 124197
ER -