Abstract
Recently, the use of steel fiber at high rates has been introduced as the sole method of reinforcement for fully elevated-suspended slabs having long span such as 5 m to 8 m each way, with a span to depth ratio of up to 33 [1]. As a result of long practical experience the total replacement of traditional rebar is a new routine. Now it is also used in the designing of SFRC pavements over conventional concrete pavements. Within the project framework a demonstration of a steel-fiber-reinforced roller-compacted concrete (SFR-RCC) pavement was constructed in a rural as well as urban area. In order to assess the economical condition of the demonstration pavement, life cycle assessment (LCA) and life cycle cost analysis (LCCA) studies were undertaken. This is the advancement study of the various papers which is already published in many publications which serve as the main and important source of study for the research. Many applications of steel fiber are listed in the paper but the main output of this paper is that SFR-RCC is more economically sustainable than others and also helps in reducing the thickness of the pavement up to 20 to 25 percent, due to the excessive strength of steel fiber. The roads of the present system required high cost investment. And the life period is almost 20 years theoretically but the actual life of the road is depending on the maintenance and the applied load. The constructions of road have been done since the 3500 BC but the method does not change fully. Also the cost of the construction is increased continuously; as a result, the construction of roads is more and more complicated and time taken. For the better and economical construction of the roads, we use steel fibers in the composite pavement. The theoretical plan of the construction of composite pavement is given in the methodology, which gives the appropriate idea about the construction of road using steel fiber. Here we use the composite pavement in which the steel fiber is mixed in the concrete layer, after which the bitumen layer is laid for the smooth and suitable riding of the vehicles.
Highlights
The motive of the research and studies is that the Steel Fiber Reinforced Concrete (SFRC) Roads is more economically sustainable than others
Before understanding the benefits and results of the use of steel fiber in roads, first we study about the history of roads with the present condition of road for understanding the economical use of steel fiber in composite pavement of roads construction
Road Pavements can be divided into 3 major types [5]: a) Flexible pavements; b) Rigid pavements; c) Composite pavements. a) Flexible Pavements: Flexible pavements consist of six layers with their approximate thickness of layer: 1) Surface course (2 - 5 cm); 2) Binder course (5 - 10 cm); 3) Base course (10 - 30 cm); 4) Sub-Base course (10 - 30 cm); 5) Compacted sub-grade (15 cm); 6) Natural sub-grade
Summary
The generation of idea that concrete could be strengthened by fiber was first put forward by Porter in 1910, but little progress was made in its development till 1963, when Roumaldi and Batson carried out extensive investigations and published their classical paper on the subject. The steel-fiber-reinforced concrete (SFRC) in Australia has been growing 30 to 40 percent per year. The material has been batched by more than 200 batch plants, both large automated city plants and small portable plants. It is included in Australia’s Swimming Pool Standard (AS2785) and its Septic Tank Standard (AS1546). Due to the excessive strength of steel fiber, pavement thickness can be reduced up to 20 to 25 percent and it is added to the concrete to provide toughness in the hardened state for reducing the failure of cracking due to long term drying, shrinkage, load and fatigue
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