A STUDY ON MECHANICAL PROPERTIES OF ENGINEERED CEMENTITIOUS COMPOSITE CONCRETE
Salman B, Perarasan M, Anuradha R
Department of Civil Engineering
Adithya Institute of Technology, Coimbatore, Tamil Nadu, India
ABSTRACT: Bendable concrete is also known as ECC (Engineered Cementitious Composites) is a class of ultra-ductile fibre reinforced cementitious composite charaterised by high ductility and tight crack with control. The demand for tensile strength is high for concrete because higher loading requires more than 10% of compressive strength which make a critical issue for engineers. Another major issue faced by normal concrete is lack in ductility and strain capacity. Engineered Cementitious Composites (ECC), also known as Bendable Concrete, has been designed to overcome the brittleness of concrete. It has tensile ductility of 3–5% and its self-controlled tight crack width is less than 100µm.It is a unique type of cement mixture with composition of low volume fibers (~ 2%) so as to impart ductility, ability to repair and high tensile strength besides. It also has low maintenance and is environment friendly in nature. The ECC composition does not contain coarse aggregate because they develop larger crack width which tend to have a negative effect on ductile behavior of ECC. This paper demonstrated a detailed review on properties of ECC and experimentally identified the best ECC mix by analysing the compressive the flexural strength at different ratios: 0.5%, 1%, 1.5% and 2% of PVA fibre. Twelve cubes (150mm x 150mm x 150mm) were casted for compressive strength test and Four beams (500mm x 100mm x 100mm) were casted for flexural strength and tested at the age of 28 days.
KEYWORDS: ECC- Engineered Cementitious Composites, (PVA) Polyvinyl Alcohole Fibre, Flexural Strength, Compressive strength