Effect of Blended Palm Oil Fuel Ash and Pulverised Burnt Clay Bricks on the flowing Ability of Self-Consolidating Binder Paste.

Abstract

This paper presents the flowing ability of binder pastes formulated from series of binary and ternary blended self-consolidating concrete incorporating blended palm oil fuel ash (POFA) and pulverised burnt clay bricks (PBC). Three series of binder paste were produced using various percentages of blended POFA and PBC at different water to binder ratios (W/B). The first series was produced with different dosages of class F polycarboxylic based high range water reducer (HRWR), the second series was produced without HRWR but at varying water content. The water content of the third series was based on standard consistency. The effect of HRWR, binary and ternary blend of Ordinary Portland cement (OPC), POFA and PBC and W/B ratio on the flowing ability of the binder paste were observed. The result shows that the flowing ability of both series increases with an increase in the HRWR dosage, water content and up to 20% PBC content; the flowing ability decreases at lower W/B ratio, higher POFA content and higher blended POFA and PBC content. A blend of POFA and PBC of up 30% with a HRWR saturation dosage of ≤ 2.5% is considered suitable for the production of selfconsolidating paste and concrete with W/B ≤ 3.0 and up to 0.40.