Slow Sand Filtration

Rapid Sand Filtration

Preserving Pisa's Treasure
Pisa's bell tower, a prime example of Romanesque architecture, would be renowned even if it did not lean. Construction of the tower began in 1173 and was not completed until...

Deep Freeze
In engineering, overcoming a failure can sometimes be more instructive than completing a project with unqualified success. Such was the case with the collapse and repair of a force main...

Effect of Aluminum Compression on ACSR Conductor Sags at High Operating Temperatures
Deregulation and restructuring are sweeping the electric utility industry in the United States. As a result, many utility engineers are analyzing, re-rating, and upgrading their most critical...

Larger Foraminifers as Contributors to Carbonate Beach Sands
Larger foraminifers are locally significant contributors to tropical carbonate sediments, particularly in the Indo-Pacific region. The two major factors influencing foraminiferal production...

Geotechnical Aspects of Beach Restoration
Large-scale beach restoration undertaken by the U.S. Army Corps of Engineers in Florida requires millions of cubic yards of beach quality sand. Exploration for these sand resources starts...

Settling Down
Engineers in Florida will prepare the sandy foundation of a future power plant by preloading it with sand for as long as a year....

Saving Saluda
One of the largest roller-compacted-concrete berms in the United States will stand sentinel in case South Carolina's Saluda Dam undergoes liquifaction in response to strong...

Evaluating the Liquefaction Potential of Coal Waste Impoundments

Evaluation of the Inter-Lok Retaining Wall System
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF/IIEC Innovation Center. This report describes a HITEC evaluation designed...

Evaluation of the Geo-Con Vert Wall System
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF/IIEC Innovation Center This report describes a HITEC evaluation designed...

Evaluation of the Maccaferri Terramesh System Retaining Wall
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF/IIEC Innovation Center. This report describes a HITEC evaluation designed...

Draining in a New Direction
(Available on in special edition) Wick drains can stabilize slopes and landslides by accelerating soil consolidation and settlement. But conventional wick drains, driven vertically into...

Impact of Scaling Rule on Simulating the Transport of DNAPLs
Due to the pollutants from lots of industry sewage and organic solvents, they arelow solubility in water and hard to decompose in nature, didn.t treated adequately, itwill cause the ground...

Concrete Delivers
The latest addition to the skyline of Shanghai, China, is a strikingly slender all-concrete 62-story office tower. It is the city's tallest all-concrete building, achieving...

Going Against the Grain
Conventional wisdom has it that granular soils perform better in mechanically stabilized earth (MSE) wall systems. Their properties are well known and simple to express in mathematical...

Stabilizing a Crater Rim
A geocell and geogrid reinforced soil slope concept was selected to stabilize approximately 120 m of eroding and unstable portions of the crater rim at the National Memorial Cemetery of...

Towering Achievement
A new headquarters complex being constructed for Goldman Sachs in New York City will rise where a Colgate factory once stood. The complex will incude a high-rise main building, a mixed-use...

Bridge to the Future
An arched footbridge under construction in Seoul, South Korea, that is reconnecting the metropolis with a tranquil island, will demonstrate the compressive strength and sleek design potential...

 

 

 

 

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