Abstract
Introducing fibers into concrete aims to improve the low tensile strength of concrete and its brittle properties. In this research, readily available PVC coated welded wire mesh with diameter of 1 mm was used as fibers in concrete. There are several variations of concrete samples prepared for this study, i.e. based on the fiber’s volume fraction, length and interlocking schemes. Concrete samples were subjected to tensile and compressive strength, and elastic modulus tests. The results show that the incorporation of PVC coated welded wire mesh slightly increases the tensile strength of concrete, with the optimum fiber volume fraction of 1.5%; with the fiber length of 3.6 cm, and with the interlocking of 1.2 cm. However, the concrete compressive strength is slightly reduced, compared to the normal ones. The presence of PVC coated welded wire mesh as fiber also tends to reduce the elastic modulus of fiber reinforced concrete.
Highlights
Concrete has been widely used in construction due to its high compressive strength, excellent workability and moulded into any shape
Several problems attached to ordinary concrete, i.e. possesses low tensile strength, low ductility, and low resistance to cracking, which could lead to failure of concrete
Higher fraction of fiber content in concrete reduces workability, and the fresh concrete becomes much harder to mould that may lead to porosity
Summary
Concrete has been widely used in construction due to its high compressive strength, excellent workability and moulded into any shape. Several problems attached to ordinary concrete, i.e. possesses low tensile strength, low ductility, and low resistance to cracking, which could lead to failure of concrete. There are needs to improve the performance and durability of concrete, as well as reducing the defects in concrete. Ismail et al reported that the use of fiber in concrete can improve its resistance to pull out or stress to rupture [4]. Rambo et al found that some properties of fiber control the dry and plastic shrinkage cracking, reduces bleeding of water [5]. Behaviour of various types of fibers, e.g. steel, glass, rubber, synthetic and natural fibers, in reinforcing concrete, has been studied widely.
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