01514813

Component

https://doi.org/10.3141/2401-03

http://scholar.google.com...+Ven&publication_year=2014

Because of the depletion of good-quality materials, the use of cement stabilization for subbase and base layer materials often offers a feasible solution. As with all pavement materials, the design inputs must be determined, and this process requires comprehension of material engineering properties such as flexural strength and elastic moduli. Usually, four-point beam loading is preferred for flexural testing because the test simulates the stress–strain gradient as generated within a pavement layer. However, beam geometry, maximum aggregate particle size, and test configuration influence property measurements, which affect the mechanistic design input values. This study examines the influence of beam geometry and aggregate particle size used with respect to the span–depth ratio in the four-point beam test in monotonic loading. An increase in beam depth at a fixed loading span was shown to result in a decrease in flexural strength and elastic modulus but an increase in beam shear stresses. However, an increase of the span–depth ratio significantly reduced the resultant shear stresses in the beam. Additionally, the presence of large aggregate particles in a small beam generated localized zones of weakness, which significantly influenced the resultant flexural strength and elastic modulus.

01529205

14-0174

English

pp 22–29

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309294942

Print

Figures (6) ; References (13) ; Tables (2)

Aggregates; Cement; Flexural strength; Modulus of elasticity; Shear stress; Stabilized materials; Subbase materials

Geotechnology; Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers

TRIS, TRB, ATRI

Jan 27 2014 2:10PM

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• Preventing Swelling and Decreasing Alkalinity of Steel Slags Used in Highway Infrastructures
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