01124402

Component

https://doi.org/10.3141/2113-15

http://scholar.google.com...lino&publication_year=2009

The concept of grading material composition in a predetermined direction to target multiple objectives and functionality is applicable to the layering and positioning of different materials at specified depths. From a fracture mechanics perspective, this study explores the advantages of using functionally graded concrete materials (FGCMs), that is, plain concrete and fiber-reinforced concrete (FRC), in two distinct layers. The fracture energy (G) and residual load capacity (Pδ) of two-layered concrete beams are investigated by means of numerical simulations with a cohesive zone model (CZM) implemented in a finite element framework. The required fracture parameters for defining the CZM are obtained from individual fracture tests of the plain concrete and FRC materials. The numerical simulations analyzed the effects of FRC thickness and position (whether at the top or bottom of the beam) on the fracture resistance of the two-layered concrete beam. A cost–benefit analysis showed that the FRC placed in the bottom lift is more fracture efficient (higher G- and Pδ-values at lower cost) than when it is placed in the top lift. There is also an optimal FRC thickness in which the benefit in fracture resistance is reduced as the FRC layer is increased. The application of a CZM to predict the fracture behavior of an FGCM beam has demonstrated its potential for also quantifying the effects of FGCMs on the fracture resistance of concrete pavements.

01145990

09-0870

English

pp 122-131

2009

Transportation Research Record: Journal of the Transportation Research Board

9780309126274

Print

Figures (7) ; References (37) ; Tables (2)

Benefit cost analysis; Concrete; Concrete pavements; Fiber reinforced concrete; Finite element method; Pavement layers; Simulation; Thickness

Fracture energy; Fracture resistance; Residual capacity

Highways; Materials; Pavements; I32: Concrete

TRIS, TRB, ATRI

Jan 30 2009 5:06PM

• Can Soy Methyl Esters Reduce Fluid Transport and Improve Durability of Concrete?
• Computational Molecular Analysis of Chloride Transport in Hydrated Cement Paste
• Determining Rapid-Setting Material Suitability for Expedient Pavement Repairs: Full-Scale Traffic Tests and Laboratory Testing Protocol
• Effect of Clinker Chemistry on Salt Scaling Resistance of Concrete
• Effect of Relative Humidity on Coefficient of Thermal Expansion of Hardened Cement Paste and Concrete
• Evaluation of D-Cracking Preventive Measures in Ohio Test Pavement
• Field and Laboratory Evaluation of Pervious Concrete Pavements
• Modeling of Bond Stresses of Overlay–Bridge Deck System
• Moisture Transport Model for Enhancing FHWA HIPERPAV Predictions
• Performance of Rigid Pavements Containing Recycled Concrete Aggregate: Update for 2006
• Pervious Concrete Pavement: Integrated Laboratory and Field Study
• Properties of Concrete Incorporating Magnetized Water
• Properties of Concrete Incorporating Ultrafine Fly Ash and Silica Fume
• Reappraisal of Recycled Concrete Aggregate as Coarse Aggregate in Concretes for Rigid Pavements
• Recycled Concrete Aggregate Coefficient of Thermal Expansion: Characterization, Variability, and Impacts on Pavement Performance
• Sampling and Testing Latex-Modified Concrete for Permeability to Chloride Ion
• Sustainable Concrete Through Reuse of Crushed Returned Concrete