Developing a Premium Cementitious Filler Incorporating High Content of Sewage Sludge Fly Ash
الباحث الأول:
Manar Herez
الباحثين الآخرين:
Hassan Al Nageim, Clare Harris and Linda Seton
المجلة:
Proceeding of 2nd International Conference Trends and Recent Advances in Civil Engineering, Noida, I
تاريخ النشر:
None
مختصر البحث:
Cold bituminous emulsion mixture (CBEM) is a sustainable alternative to the conventional hot mix asphalt (HMA) due to the environmental and safety issues associated with the use of the latter. However, CBEM experiences some drawbacks including low e…
Cold bituminous emulsion mixture (CBEM) is a sustainable alternative to the conventional hot mix asphalt (HMA) due to the environmental and safety issues associated with the use of the latter. However, CBEM experiences some drawbacks including low early life strength, high air voids and long curing time, thus it needs from 2-24 months to reach its ultimate strength. Accordingly, the applications for CBEMs have been limited to low/medium trafficked roads, footways and reinstatements. The aim of this study is to develop a new secondary cementitious material incorporating a high volume of sewage sludge fly ash (SSFA) with low ordinary Portland cement (OPC) content and carbide lime waste (CLW), to be used as a replacement to the conventional limestone filler in CBEM. The results demonstrated a significant improvement in the performance of the developed CBEM in terms of indirect tensile stiffness modulus (ITSM) and microstructure analysis compared to the conventional CBEM incorporating limestone filler. Furthermore, the developed mixture has being comparable to the mixtures including OPC and the conventional HMA. Scanning electron microscopy (SEM) analysis revealed that a considerable changes in the microstructure components over the curing ages has been developed which confirm the creation of cementitious products such as C-S-H and ettringite.
