ABSTRACT
Controlled Permeability Formwork (CPF) can be used to improve the strength, durability and appearance of concrete. This is achieved by allowing excess water and gas to escape at the surface adjacent to the formwork. This paper reports a study aimed at assessing whether such permeable formwork can be used to reduce curing times whilst maintaining durability and strength characteristics. An experimental study is described where trial walls are constructed and tested at various ages following different curing periods and regimes. Results are presented that compare the outcomes of using permeable membrane with those of using a traditional formwork. A comparison of durability characteristics and compressive strength is made. The strength and durability of the walls was assessed by techniques such as: Schmidt hammer; permeability; and water absorption. Results are presented in terms of how different curing regimes can be employed to achieve equivalent characteristics. A discussion of how such techniques may be used to reduce construction time is presented.
