ABSTRACT
The use of microwave energy as a source of heat to accelate curing of fibre reinforced cement composites (F.R.C.C.) was investigated. Tests were performed on composites containing metakaolin in order to prevent the deposition of portlandite at the glass-matrix interface. E Glass and A.R. glass fibres were used at a dosage of 5 % by weight of binder. F.R.C.C. were premixed without vibration or pressing.
Specimens were treated with different levels of microwave power, shortly after casting. The flexural strength was then determined.
When the composites containing 20 or 30 % metakaolin were respectively treated for 120 or 90 minutes on a power level of about 120–200 W, all the calcium hydroxide was consumed. The flexural strengths measured after the microwave treatment were in the range 9–12 MPa.
