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Full-Text Articles in Engineering

A New Method Of Producing High Strength Oil Palm Shell Lightweight Concrete, Zamin Jumaat Dec 2010

A New Method Of Producing High Strength Oil Palm Shell Lightweight Concrete, Zamin Jumaat

Zamin Jumaat

This paper presents a new method to produce high strength lightweight aggregate concrete (HSLWAC) using an agricultural solid waste, namely oil palm shell (OPS). This method is based on crushing large old OPS. Crushed OPS are hard and have a strong physical bond with hydrated cement paste. The 28 and 56 days compressive strength achieved in this study were about 53 and 56 MPa, respectively. Furthermore, it was observed that it was possible to produce grade 30 OPS concrete without the addition of any cementitious materials. Compared to previous studies, significantly lower cement content was used to produce this grade …


Construction Project Cash Flow Planning By Pareto Optimality Efficiency Network Model, Aiyin Jiang, Raja R.A. Issa, Maged Malek Dec 2010

Construction Project Cash Flow Planning By Pareto Optimality Efficiency Network Model, Aiyin Jiang, Raja R.A. Issa, Maged Malek

Aiyin Jiang

Cash flow is crucial for ensuring the viability of a project. It consists of a complete history of all cash disbursement, cash shortage, loans, cost of money, and all earnings received. Although significant research work has been conducted on cash flow forecast, planning, and management, the objective is constantly the maximization of profit/final cash balance, or minimization of total project cost. Moreover, cash flow forecasting needs to be effective and fast. The paper develops multiple-objective cash flow planning model – Pareto optimality efficiency network model, which considers typical banking instruments, the constraints of the financial market, the budget constraints, and …