26-08-2017, 12:06 PM
28-08-2017, 10:52 AM
New materials and construction techniques are required to provide Civil Engineering alternatives to traditional road construction practices. Traditional techniques have not been able to withstand the burden of mixed traffic for a long time. Therefore, the pavement requires overlap. To overcome this problem the inclusion of fiber in pavements is adopted today. This paper highlights the use of discrete fiber in road construction. Recently, geosynthetics have been used to reinforce and separate the base course material for aggregate surface roads and flexible pavements. The inclusion of discrete fibers increases the shear strength and ductility.
Concrete shrinkage cracking is a major problem in concrete concrete pavements, especially in tropical regions. To overcome the shrinkage cracking of smooth concrete, it is sometimes suggested to add synthetic fiber to the concrete mix. This paper briefly discusses the effects of the addition of discrete polypropylene and fibrillated fiber on the properties of a mixture of paving concrete from 48 MPa to 28 days of compression. Six concrete mixtures were made with 0.05%, 0.10% and 0.15% by volume fiber in addition to the control concrete mixture. In this study discrete and fibrillated polypropylene fiber was used. Properties such as sedimentation, compressive strength, drying shrinkage and abrasion resistance of the concrete were evaluated. The study suggests a significant reduction in settlement and shrinkage by drying without significant changes in the compressive strength of fiber-reinforced concrete mixtures.