Abstract: Stream flow in mobile river beds gives rise to scour phenomena around river piers that may jeopardize the stability of the bridge. As scour is dependent on pier shape (among other factors), estimating equations generally introduce shape coefficients. In the present study experimental tests concerning scour phenomena have been carried out on a particular shape of the already effective circular piers in order to determine if any improvement is verified in their shape coefficient (with a corresponding decrease in scour). In particular, the circular pier foundation has been shaped as a truncated cone, partially or totally sunk into the mobile bed. In the experimental tests a preliminary comparison has been effected between scour at uniform circular pier and non uniform piers with two different values of bevel angle for the truncated cone foundation. Experimental results have showed that, for both values, the scour depth has been lower than that identified in experimental tests conducted on

• Publication Date: 19-Aug-2016
• DOI: 10.15224/978-1-63248-101-6-05
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Abstract: In this paper slab application of propylene reinforced lightweight concrete is discussed. The effect of fibers on flexural strength of lightweight concrete was investigated and possible slab use of propylene fiber reinforced lightweight concrete was discussed. In the frame work of the study, fiber reinforced lightweight concrete was produced with using short propylene fibers, lightweight aggregate (perlite), cement, sand, plasticizer and water. Propylene fibers are used provide ductility in place of steel reinforcement. Perlite used as aggregate provides lightweight. Cement and sand component are used for strength. The cube, cylinder and beam samples were prepared to determine material and mechanical properties of fiber reinforced lightweight concrete. Possible use of fiber reinforced lightweight concrete as slab; the slabs (panels) with the dimension of 13x50x150cm were produced. The panels were tested in four-point bending test to determine flexural strength (MOR, modulus of rupture)

• Publication Date: 19-Aug-2016
• DOI: 10.15224/978-1-63248-101-6-06
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