EXPERIMENTAL INVESTIGATION ON MECHANICAL PROPERTIES OF AIR-CURATED ACTIVATED CONCRETE FOR RURAL PAVEMENTS
Chandra Sekhar Malla1, Mukunda Rao D2
1Research Scholar, Civil Engineering Department, Gitam School of Technology, Visakhapatnam, India, 530045
2Associate Prof and Department Head, Civil Engineering Department, Gitam School of Technology, Visakhapatnam, India,530045
In the present study, the probabilistic use of alkaline binders in rigid pavements is examined. The performance of Conventional concrete (CC) and Alkali Activated slag concrete (AASC) along with Polypropylene fiber (PPF) inclusion is discussed. Complete cement replacement was done with Ground granulated blast furnace slag and a mix of M20 grade concrete is prepared as per IS 456 and IS 10262. Trial mixes are carried out for the selection of optimum Activator modulus (Ms) and also the percentage of Polypropylene fiber results are plotted. A combination of 14M Potassium hydroxide (KOH) and Potassium silicate solution along with Ms of 1.25 and 5 percentage Potassium oxide dosage is considered to be the best for slag mix. Mechanical properties are studied for both concrete mixes and it is noticed that the AASC +1%PPF performance is slightly better than another mix. The utilization of activated binder covers will limit the natural perils happening from increased OPC creation, alongside compelling usage of modern waste materials and protection of regular assets. It is more suitable for Rural Rigid pavements where the load-carrying capacity is low and it also helps in ecological and economical aspects.
Keywords: Activator modulus, Fiber, AASC, KOH, Potassium silicate solution, Strength.