Microwave curing parameters of in-situ concrete repairs

Different proprietary repair materials and a CEM II mortar were used to characterise the relationship between the main parameters of microwave curing (power, curing time, temperature rise and volume). The time-temperature-power relationships are linear for normal, non-rapid setting repair materials cured within the recommended temperature range taking account of temperature variation and heat of hydration. A general relationship between the microwave curing parameters of power, temperature rise, curing time and repair volume has been derived. It has been used to design and operate a prototype system. Steel reinforcement in the repair remains free from arcing under microwave exposure.

[1]  R. Croft,et al.  Specific Electromagnetic Effects of Microwave Radiation on Escherichia coli , 2011, Applied and Environmental Microbiology.

[2]  D. Johnson,et al.  Microwave curing effects on the 28-day strength of cementitious materials , 1999 .

[3]  J. Pera,et al.  MICROWAVE PROCESSING OF FIBRE REINFORCED CEMENT COMPOSITES , 1992 .

[4]  Christopher K.Y. Leung,et al.  MICROWAVE CURING OF PORTLAND CEMENT CONCRETE: EXPERIMENTAL RESULTS AND FEASIBILITY FOR PRACTICAL APPLICATIONS , 1995 .

[5]  Tang Mingshu,et al.  Microwave curing technique in concrete manufacture , 1987 .

[6]  P. Mangat,et al.  Bond between microwave cured repair and concrete substrate , 2017 .

[7]  P. Mangat,et al.  Microwave system for in-situ curing of concrete repair , 2016 .

[8]  P. Mangat,et al.  Microwave curing of concrete bridge repairs , 2015 .

[9]  Pal Mangat,et al.  A novel low voltage heating system for curing and protection of early age concrete , 2005 .

[10]  P. Mangat,et al.  Temperature development in microwave cured repair materials , 2016 .

[11]  N. Makul,et al.  Use of microwave energy for accelerated curing of concrete : a review , 2009 .

[12]  Ali Akbarnezhad,et al.  Microwave-Assisted Concrete Technology , 2014 .

[13]  Ming-Gin Lee.  Preliminary Study for Strength and Freeze-Thaw Durability of Microwave- and Steam-Cured Concrete , 2007 .

[14]  B. P. Jones,et al.  British Standards Institution , 1943, Nature.

[15]  Christopher K.Y. Leung,et al.  Determination of optimal process for microwave curing of concrete , 1997 .

[16]  Eric Mayer,et al.  Properties Of Concrete , 2016 .