Dynamic Properties of Gravels Sampled by Ground Freezing

Evaluation of Silane Sealer Application on Concrete

Repair of Abrasion/Erosion Damage to Vallecito Dam with Silica Fume Concrete

Re-Repair of the Piedras Bridge in El Paso, Texas with a New Low Pressure Spray Applied Structural Repair Mortar System

ASTM C666 (A) Freeze-Thaw Durability of Air-Entrained Wet- and Dry-Mix Shotcrete
In order to assess the freeze-thaw durability of shotcrete, six samples of dry-mix shotcrete and one sample of wet-mix shotcrete were mixed outdoors at Hydro-Quebec's research institute...

Durability of Concrete Bridges in Virginia
This paper discusses four major types of deterioration found in concrete bridges: corrosion of the reinforcement, alkali-aggregate reactivity, freeze-thaw deterioration, and attack by...

Optimum Design Software Package for Shortening Civil Engineering Construction Period
The optimum software package for engineering network has adopted a coverage technology to facilitate an analysis of large-sized projects. This package has the following functions: (1)...

The Heights-Hilltop Interceptor An Ongoing Success

Durability of High Performance Concrete
The freeze-thaw durability and the resistance to chloride penetration of high performance concrete (HPC) developed for highway applications were investigated. This paper summarizes the...

Enzyme Enhanced Stabilization of Soil and Fly Ash
The purpose of this research was to determine if enzymes could be utilized to increased the strength and stability of soil mixed with fly ash. Samples were prepared with and without the...

The Assessment of Armourstone for Shoreline Protection
To protect shorelines from erosion, Ontario Hydro is using armourstone at various Generating Stations along the perimeter of the Great Lakes. Armourstone is carefully evaluated prior to...

Santa Cruz Dam Modification
Santa Cruz Dam was the first concrete arch dam in the United States to be modified using an roller compacted concrete (RCC) buttress. Innovative techniques included forming the stepped...

Passive Acoustic Emission for Quantitative Evaluation of Freeze Thaw and Alkali Aggregate Reaction in Concretes
Several experiments are reported in which the progression of freeze thaw (FT), alkali-aggregate reaction (AAR), and internal cracking caused by mechanical loading were monitored using...

Thaw Weakening Research at the Minnesota Road Research Project

Measurement of Shock Pressure from FWD on a Concrete Pavement by Impedance-Matched Shock Gauge

Extraction of Potable Water from Urine for Space Applications
A regenerative technology capable of managing water and wastewater on-board long-term manned space platforms is essential if the Bush Administration's Space Exploration Initiative (SEI)...

A Removable Submarine Cover for Drydock No. 2 Modernization
In order to provide balanced overhaul capability and flexibility in the 1990's and beyond, the Portsmouth Naval Shipyard in Kittery Maine, a major U.S. Navy submarine and overhaul repair...

Bridge Deck Distress and Repairs
The primary cause of bridge deck deterioration are cyclic freeze-thaw exposures and reinforcing steel corrosion caused by the extensive use of de-icing salts. However, there are other...

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...

Reliability-Based Design for Feeeze-Thaw Concrete
Observation of pavements in Iowa shows results from the test for freezing and thawing of concrete, ASTM C-666, is not always consistent with field performance. Similar concrete made with...

 

 

 

 

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