Ultrasonic pulse velocity (UPV) and initial rate of waterabsorption (IRA) of foam concrete containing blendedcement

Abstract

Abstract. The adverse environmental effects caused by cement production activities could be minimized by reducing the use of cement in the concrete mix, replacement with eco-friendly materials, and making low-unit weight cement-derived products. During the cement production activities, fly ash can also be used by mixing it in form of Portland Composite Cement (PCC)/blended cement products or directly in the concrete mixing process. Furthermore, in low-unit weight concrete, foam concrete is usually obtained using an agent that forms random air bubbles in the cement paste and is applied in construction according to its structural function. Therefore, this research aims to study and analyze the correlation between unit weight and non-destructive tests (NDTs) value on foam concrete with variations in the use of cement, namely OPC, PCC-1, PCC-2, and OPC+FA. The quality of the foam concrete was evaluated by non-destructive tests, there are Ultrasonic Pulse Velocity (UPV) and Initial Rate of Water Absorption (IRA). The results show that UPV value of all specimens is directly proportional to its unit weight and varied inversely to the IRA value.

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