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Thermal acceleration of Portland cement mortars with microwave energy

✍ Scribed by R.G. Hutchison; J.T. Chang; H.M. Jennings; M.E. Brodwin

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
227 KB
Volume
21
Category
Article
ISSN
0008-8846

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✦ Synopsis

The use of microwave energy as a source of heat to accelerate curing of ordinary Portland Cement mortar was investigated.

Shortly after casting, specimens were treated with different levels of microwave power.

Microwave heating produced an increase in temperature that shortened the induction period and increased the rate of hydration for the first 24 h compared to specimens cured at 20Β°C.

The microwave treatment did not alter significantly the compressive strength of the samples compared to samples cured at 20 degrees Celsius.

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## Abstract Concrete resistivity is directly related to relative humidity (RH) and is also affected by temperature. In this paper, a theoretical discussion about how these two factors affect resistivities of concrete and mortar is provided. Moreover, experimental results on sensorized mortar probes