01045595

Component

https://doi.org/10.3141/2020-03

http://scholar.google.com...ange&publication_year=2007

Concrete sawing operations are performed at predetermined locations within the first 24 h to prevent random cracking on jointed plain concrete pavements. In current construction procedures, the depth and timing of the saw are usually established by the contractor on the basis of experience. A study analyzed the effect of several concrete mixture proportions and constituents on the early-age fracture properties and their effect on saw cut timing and depth for concrete pavements with several slab geometries. Concrete pavement mixtures with different coarse aggregate size and cementitious content were evaluated to determine sensitivity of the measured fracture properties on saw cut model predictions. Finite element analysis was used to derive the geometric correction factors necessary to characterize the fracture properties of concrete based on the wedge splitting test configuration. A saw cut depth model previously proposed was modified to determine the timing and depth of notches on jointed plain concrete pavements. The theoretical analysis and practical example lead to the observation that if greater time is desired before saw cutting, the design should favor concrete materials with slower development of fracture properties. Thinner concrete pavements also require significantly deeper notch depth ratios relative to those of thicker slabs.

01084476

English

pp 20-29

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104470

Print

Figures (6) ; References (19) ; Tables (6)

Coarse aggregates; Concrete pavements; Construction management; Depth; Finite element method; Fracture mechanics; Mathematical models; Mix design

Early age cracking; Saw cutting

Construction; Highways; Materials; I32: Concrete

PRP, TRIS, TRB, ATRI

Feb 8 2007 5:36PM

• Alkali–Silica Reactivity Potential of Aggregate and Concrete Evaluated by Dilatometer Method: Performance-Based Approach
• Bulb-T Beams with Self-Consolidating Concrete on Route 33 in Virginia
• Development of Precision Statement for Determining Air Void Characteristics of Fresh Concrete with Use of Air Void Analyzer
• Effect of Coefficient of Thermal Expansion Test Variability on Concrete Pavement Performance as Predicted by Mechanistic-Empirical Pavement Design Guide
• Evaluation of Self-Consolidating Concrete for Drilled Shaft Applications at the Lumber River Bridge Project, South Carolina
• Freeze–Thaw Resistance of Concrete with Marginal Air Content
• Image-Processing Technology to Evaluate Static Segregation Resistance of Hardened Self-Consolidating Concrete
• Influence of Mixture Design and Environmental Factors on Continuously Reinforced Concrete Pavement Cracking
• Modified ASTM C 1293 Test Method to Investigate Potential of Potassium Acetate Deicer Solution to Cause Alkali–Silica Reaction
• Thermal and Autogenous Shrinkages of Very Early Strength Latex-Modified Concrete