BUILDING ON A PERFORMANCE RELATED APPROACH TO USE NORMAL WEIGHT AGGREGATES IN CONCRETE: RECYCLED AGGREGATE David J Collery 1 , Kevin A Paine 2 , Tomas O'Flaherty 1 1. Institute Technology Sligo, Ireland 2. University of Bath, UK ABSTRACT. This paper builds on research and development projects undertaken and published in several papers by the authors on the use of recycled and manufactured aggregates during the past 15 years. This paper compares strength, load-dependent and load- independent deformation characteristics of concrete made from normal-weight, natural, recycled and manufactured aggregates. The main aim of the paper is to promote the work that has and continues to be undertaken regarding a performance related approach of all normal- weight aggregates within the framework of BS EN 12620, the United Kingdom aggregate standard. Thereby having the implication of removing the stigma commonly associated with the recycled and manufactured materials. Keywords: Normal Weight Aggregates, Recycled Aggregates, Performance Related Approach, BS EN 12620, EN 206 Dr David J Collery is a Lecturer in the Department of Civil Engineering and Construction at Institute Technology Sligo, Sligo, Ireland. Researcher in construction materials. Dr Kevin Paine is a Reader at the Department of Architecture and Civil Engineering, BRE Centre for Innovation Construction Materials, University of Bath, Bath, UK. Dr Tomas O'Flaherty is a Lecturer in the Department of Civil Engineering and Construction at Institute Technology Sligo, Sligo, Ireland. Researcher in construction materials.