Covering Concrete Surfaces with Gunny Bags:

The exposed surface of concrete is covered with old empty cement bags or hessian, which are kept moist by spraying water frequently. This method is widely used for structural concrete. This method can also be applied for horizontal and vertical members. The surface should not be allowed to dry even for small duration during the period of curing.

Curing of Concrete by Infrared Radiation:

It is claimed that a much more rapid gain of strength can be obtained in this method than even with steam curing. A fast initial increase of temperature does not result in a decrease in the ultimate strength as it does in the case of steam curing. The system is define as particularly applicable to the manufacture of hollow concrete products in which case the heaters are placed in the hollow spaces of the product. The normal operating temperature is 90°C. The curing of concrete by infrared radiation has been used in Russia.