|Published online: June 4, 2014||$US5.00|
The strength and durability of reinforced, hollow-fill concrete block work is mandated by design codes, which are interpreted by designers and implemented on the site by the trades. The eventual performance of the block work is dependent upon an appropriate combination of specification, and on-site execution and quality control, and any inadequacy in these steps will result in suboptimal performance, be it in terms of wall strength or longevity. The accuracy with which reinforcements bars are located both in relation to each other, and to the faces of the wall is a major determinant in this regard. Traditionally, reinforced block work is specified using conventional wire tying wherever continuity or proximity is required. A new product has been developed to replace wire tying. Research was conducted to determine the effect that its use would have upon both the speed of erection and quality control during construction of a reinforced concrete block retaining wall. The research revealed that the use of the device resulted in a completed wall structure that met the requirements of AS3700-2001 Masonry Structures in terms of achieving correct reinforcement positioning, consistently achieving greater accuracy than conventional best practices. Moreover it achieved a construction speed comparable with commonly encountered, low quality practices, and resulted in construction times 20% faster than best practice, wire tied techniques.
|Keywords:||Reinforced Concrete Block Wall, Efficiency, Quality Control|
The International Journal of the Constructed Environment, Volume 4, Issue 3, June 2014, pp.43-51. Article: Print (Spiral Bound). Published online: June 4, 2014 (Article: Electronic (PDF File; 656.904KB)).
Head of Discipline: Building, School of Architecture and Built Environment, University of Newcastle, Newcastle, NSW, Australia