BRACING OF PRECAST ELEMENTS ON EARLY AGE LOW STRENGTH CONCRETE-GAPS WITHIN CURRENT STANDARDS AND HOW THE INDUSTRY HAS ADAPTED

摘要

Tire Australian construction industry, driven by the need to develop more efficient and safe methods of construction, evolved the practice of erecting and bracing precast concrete elements on early age low concrete strength suspended floor systems. This method of construction has significantly compressed a multi-level building's program by at least 1-2 days per floor cycle. AS 3850.1:2015 and previous versions had not addressed the growing trend of early age erection of precast elements, which has been gaining in popularity for more than 15 years. The major challenges in deciding to move ahead with early age erection and bracing of precast elements are: Measurement of concrete strength on-site vs lab Performance of proprietary cast-in anchoring systems and the industry developed in-house types Applicability of current design theories on anchorage Compliance to an applicable standard or acceptable testing method Installation Industry stakeholder acceptance Erection Design Engineer review. The above will be investigated in parallel with the testing regime of a bracing.