Realistic Specifications for Manufactured Sand
Data which demonstrate the beneficial effect of using fine aggregate having high fines contents on concrete properties are presented. All data indicate that the use of a high fines content...

Procedures for Evaluating Aggregate Gradation Specifications
The construction and rehabilitation of transportation facilities annually consumes huge quantities of aggregates. And, the variability in supply and demand for these materials as well...

Overview of Permeable Bases
Drainable pavement systems consist of: permeable base, separator lyer, and edgegrain system. This paper focuses on permable bases. A permeable base must provide both permeability and stability....

Consistency and Fairness in Geotextile Specifications
By clearly defining required material properties in terms of 'Minimum Average Roll Values' for routine quality control tests and 'Average Test Values in the Weakest Principal Direction'...

Performance of Epoxy-Coated Steel in Continuously Reinforced Concrete Pavement
Two sections of interstate highway in central Oklahoma were recently reconstructed. On both projects, northbound lanes were reinforced with epoxy-coated steel and southbound lanes were...

High Strength, Low Permeability Garage Rehab Concrete
Physical and engineering properties of high strength structural lightweight concrete used to replace deteriorated concrete in garage structure rehabilitation programs are reported. Structurally...

Properties of Composites Using Recycled Plastics
Recycled poly(ethylene terephthalate), PET, mainly recovered from used plastic beverage bottles, can be used to produce unsaturated polyester resins. Polymer concrete (PC) and polymer...

Concreting at Subfreezing Temperatures
Temperature affects the rate at which portland cement concrete develops strength. Below about 20?C, strength gain is retarded, whereas at higher temperatures it is accelerated. Strength...

Aerogel?A Transparent, Porous Superinsulator
Silica aerogel is an unusual, transparent, low density, thermally insulating solid useful for a variety of applications. We have been investigating silica aerogel for use in transparent...

Implementation of Material Requirements in Specifications
This paper focuses on where to find information on materials, their compatibility, minimum standards and specifying of materials and their use. The paper also presents case histories on...

Physicochemical and Rheological Properties of Microwave Recyled Asphalt Binders
The purpose of this study was to analyze microwave recycled asphalt binders using Gel Permeation Chromatography (GPC), Fourier-Transform Infrared Spectroscopy (FTIR), and Dynamic Mechanical...

Investigation of Concrete at a Middle East Plant
In recent years, reinforced concrete construction in the Middle East has been beset by durability problems. The causes include availability of a limited number of skilled workers, marginal...

Composites Performance in the Infrastructure
Fiberglass reinforced plastics (FRP) composites have been used in demanding structural applications, mostly for special corrosion resistant construction products, for several decades....

Unidirected Twined-Strand Composites and Their Uses
Twined strand composites are a new class of unidirected continuous-fiber-reinforced composite materials where the orientation of the continuous fibers is a twine of unidirected helically...

Adhesives and Structural Plastics
An overview of some primary considerations for the use of adhesives and their advantages in connection of structural plastics is presented. Effective joint geometries, surface preparations,...

Full Scale Tests on Concentrically Loaded Fiber-Reinforced Pultruded Columns
This paper briefly reports on the experimental investigation in connection with the short term behavior of pultruded structural members under concentric loading. In particular, results...

Polyolefin Plastic Water Service Line Performance
Polyolefin (PO) plastic piping made from polyethylene (PE) and polybutylene (PB) materials have been used in diameters of about 1 in. for water service lines for buildings. Both PE and...

Bond Strength of Straight GFRP Rebars
An overview of a study on bond of straight Glass-fiber-reinforced-plastic (GFRP) rebars to concrete is presented. The 54 specimens to be tested include several variables, such as the mode...

Feasibility of FRP Molded Grating-Concrete Composites for One-Way Slab Systems
This paper describes the behavior of one-way concrete slabs reinforced with Fiberglass Reinforced Plastic (FRP) molded grating. FRP molded grating is commercially available and is mainly...

Hybrid (FRP+Steel) Reinforcement for Concrete Structures
The most popular method to prevent corrosion of steel rebars and prestressing tendons is epoxy coating. This paper presents an alternative approach consisting in the combination of a fiber-reinforced-plastic...

 

 

 

 

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