Strength properties of green concrete mix with added palm oil fibre and its application as a load-bearing hollow block

As issues on sustainable construction material gains prominence in Malaysia, experimental work to investigate the combination of agricultural and construction waste material into a single concrete mixture was conducted. These waste materials will partially replace cement and aggregate content with added Palm Oil Fibre (POF) involving twenty-four cube specimen and six stretcher units of Green Concrete Hollow (GCH) block samples. The optimum replacement percentage of the green concrete material is 10% Palm Oil Fuel Ash (POFA), 15% Rice Hush Ash (RHA), 20% Recycled Concrete Aggregate (RCA) and 0.25% Palm Oil Fibre (POF) resulting a cube compressive strength of 40.4 MPa at 28 days and an average compressive strength for GCH stretcher block unit at 16.31 MPa. From the results obtained, the innovative green concrete mix with added POF and the GCH stretcher block units show its potential as a building material with the ability to be sustainable, eco-friendly and a possibility to meet the reduction in carbon emissions and low carbon footprints.