Practical Industrial Microwave Technology For Rapid Curing of Precast Concrete

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Title: Practical Industrial Microwave Technology For Rapid Curing of Precast Concrete

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Publication: CIA

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Date: 2/13/2011

Abstract:
Heat curing is often used in the manufacture of precast concrete to improve production rate, particularly in cooler climates. Some of the common methods for heat accelerated curing include the use of steam or hot water, either at atmospheric pressure or in high-pressure autoclaves. There have been relatively few new innovations in rapid heat curing technologies over the last few decades. In recent years, the potential use of industrial microwave heating technology for rapid curing of precast concrete has been investigated by CSIRO, and innovative new technology. LEAP (Low Energy Accelerated Processing) . is being developed for practical applications. In this paper, an overview of recent advances in microwave curing of concrete will be provided. Results from both laboratory- and pilot-scale research show how curing cycles of less than six hours can be used to achieve sufficient strength for formwork removal and prestressing without impairing concrete quality. Both the short- and long-term prospects of applying industrial microwave heating technology for the benefit of the Australian precast industry are discussed. The implications of this technology on productivity, quality, cost and environmental impact will be discussed.


Concrete Institute of Australia, International Partner Access.

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