High Early Strength Concrete Containing Large Quantities of Fly Ash
This paper presents results of research performed at a precast/prestressed concrete plant to identify optimum mix proportions for production of high early strength concrete with high fly...
Properties of Flyash Cellular Concrete
A research program was conducted with the aim of studying the physical and flexural properties of cellular concrete containing flyash. Two different types of fibers were also added to...
Thermomechanical Damage Due to Hydration in Large Concrete Dams
This paper presents the bases of a thermomechanical model able to describe the main evolution of concrete properties with aging. The model is based on the 'maturity'...
Drying and Shrinkage of Concrete: The Case of Massive Parts
The natural drying of concrete induces a number of intense mechanical effects on the structures. These various effects are of importance to engineers: in the design stage (estimate of...
Effect of Environment on Durability of Pavement Materials: An Overview
The best known causes of material degradation in pavements include environment, traffic loads, and the use of substandard materials. Presented in the paper is a critical review of the...
Environmental Considerations in the Design of Asphalt Concrete Paving Mixtures
The design of asphalt concrete mixtures is largely based on two empirical mixture design methods. These are 'Marshall' and 'Hveem',...
Environmental Degradation of Concrete Pore Structure
This paper illustrates how Conductometric Phase Transition Porosimetry can be used to monitor changes in the pore structure of Portland Cement Concrete which result from repeated freezing...
Size Effect in Concrete Structures and Influence of Loading Rate
The size effect law models the influence of the dimensions of the structure or specimen on the failure stress. This model can be used to quantify the brittleness of failure, and determine...
Bond Stress-Slip Relationships of FRP Rebars in Concrete
A newly developed type of reinforcement bar for concrete, Fiberglass Reinforced Plastic (FRP) rebar, can be used advantageously in concrete exposed to marine or corrosive environments....
Fatigue Behavior of Bond-Anchored Unidirectional Glass-FRP's
The contribution reports on the fatigue behavior of fiberglass reinforced plastic (FRP) bars, consisting of endless E-glass fibers embedded in a polyester (PE) matrix and anchored in a...
Flexural Strength of Externally Reinforced Concrete Beams
Results from tests of one rectangular and one T-beam are reported. The beams were strengthened by epoxy-bonding a 1/4 in. (6 mm) thick Glass Fiber Reinforced Plastic plate along the tension...
Feasibility of Class C FRP Load Transfer Devices for Highway Jointed Concrete Pavements
The objective of this paper is to analyze the feasibility of using corrosion free fiberglass reinforced plastic (FRP) devices in lieu of steel tie bars in the longitudinal joints of highway...
Uni- and Bi-Axial Compressive Fatigue of Fiber Concrete
Fatigue behavior of fiber reinforced concrete is studied under uniaxial and biaxial loadings. The S-N curves and the cyclic deformations of fiber concrete are compared to those of plain...
Bond Strength of Fiber Reinforced Plastic Bars in Concrete
In this study, 27 beam specimens were tested to determine the bond strength of fiber reinforced plastic bars (FRP) in tension. The specimens were reinforced with #4, #6, or #8 FRP bars....
Measurement of Impact Fracture Toughness of FRC
Instrumented impact tests have been in use since the early eighties for studying the fracture characteristics of cement-based composites at high rates of loading. While significant progress...
Detection of Small Voids by Impact-Echo and Signal Processing
The Impact-Echo method was used to detect slab thickness, presence of small voids and reinforcement locations in a concrete slab. Studying the frequency response of the slab, it is possible...
Evaluation of High Strength Concrete by the Break-Off Method
The reliability of the Break-Off method to test inplace high-strength concrete is investigated. A total of 188 Break-Off tests and 30 standard cylinder tests are carried out for this project....
Displacement Measurement by Laser Interferometry and Image Analysis
Laser holographic interferometry was used for the evaluation of displacement fields on concrete and fiber reinforced concrete specimens. Transmission holography was used to analyze mortar...
Application of Waterjet Cutting for Pothole Repair
A study was conducted to determine the feasibility of utilizing high pressure waterjet cutting technology as an infrastructure maintenance tool. The influence of waterjet cutting parameters,...
Accurate Computation of Freezing Index
'Freezing index' (cumulative degree-days below freezing) is used for predicting frost penetration depths and modelling pavement performance. Contour maps which illustrate geographic trends...
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