Strength and Chloride Penetration of Mortar with Mixture Proportioning in Ternary Cementitious System

Abstract

This paper presents a study of the strength and chloride penetration of blended Portland cementmortar containing classified fly ash (FA) and ground palm oil fuel ash (POA). Ordinary Portland cementtype I (OPC) was partially replaced with FA and POA at the dosage of 0–40% by weight of cementitiousmaterials. In addition to normal replacement, a blend of different weight portion of FA and POA was alsoused to study the combined effect of the FA and POA. Sand–to–binder ratio of 2.75 by weight and water tobinder ratio of 0.5 were used. Superplasticizer (SP) was incorporated in order to obtain mortar mixes withsimilar flow of 110 ± 5%. FA and POA with 1–3% by weight retained on a sieve No. 325 were used.Compressive strength and chloride penetration depth of mortars were determined. The results revealed thatthe use of FA and POA produced high strength mortars. The strength of mortar containing 10% and 20% ofpozzolans and blended of pozzolans were higher than that of OPC mortar at all ages. In addition, the use ofternary blended of OPC, FA and POA also produced high strength mortars and excellent resistance tochloride penetration.

Keywords : Strength / Chloride / Fly Ash / Palm Oil Fuel Ash / Mortar