2,617 articles
AASHTO soil classification system
The AASHTO soil classification system, defined in standard AASHTO M 145, classifies highway soils into seven groups, A-1 through A-7, using particle size and plasticity.
AASHTO Standard Specifications for Highway Bridges
The AASHTO Standard Specifications for Highway Bridges were the design specifications for US highway bridges, published in seventeen editions from 1931 to 2002 before being superseded by the AASHTO LRFD Bridge Design Specifications.
AASHTOWare Bridge
AASHTOWare Bridge is a pair of bridge engineering software products owned by AASHTO: BrDR for structural design and load rating, and BrM, which stores inventory and inspection data for preservation planning.
Aberdeen, Mississippi
Aberdeen, Mississippi is a city in Monroe County, northeastern Mississippi, on the Tombigbee River, best known for its lock and dam, the fourth of ten on the Tennessee-Tombigbee Waterway.
Aberfan disaster
The Aberfan disaster was the collapse of a colliery spoil tip above Aberfan, Wales, on 21 October 1966, killing 144 people, 116 of them children.
Abernethy Bridge
The Abernethy Bridge, formally the George Abernethy Bridge, is a highway bridge carrying Interstate 205 over the Willamette River between Oregon City and West Linn, Oregon, opened in 1970.
ABET
ABET, formerly the Accreditation Board for Engineering and Technology, is a nonprofit accreditor of college and university programs in applied science, computing, engineering, and engineering technology.
Access to the Region's Core
Access to the Region's Core (ARC) was a canceled NJ TRANSIT rail tunnel project under the Hudson River to Manhattan, terminated by Governor Chris Christie in 2010.
Accropode
The Accropode is a bulky, unreinforced concrete armor unit that protects breakwaters, invented by Sogreah in France and introduced in 1980 as the first single-layer armor unit.
Acequia
An acequia is a community-operated irrigation ditch and the water-sharing institution governing it, brought from Islamic and medieval Iberia to the Americas and still functioning in New Mexico, southern Colorado, and Spain.
Acequias of San Antonio
The Acequias of San Antonio are Spanish colonial irrigation canals built along the San Antonio River in Texas from 1718 onward, serving five Franciscan missions and the town.
ACI 211
ACI 211 is the American Concrete Institute committee for proportioning concrete mixtures and its guides, best known for the 2022 guide Selecting Proportions for Normal-Density and High-Density Concrete.
ACI 440
ACI 440 is the American Concrete Institute's series of documents on fiber-reinforced polymer reinforcement for concrete, including the 2022 building code for GFRP-reinforced structural concrete and the ACI 440.1R design guide.
Acoustic emission
Acoustic emission is a passive nondestructive testing method in which sensors detect stress waves a material emits under stress, revealing active damage such as crack growth or corrosion, used in bridge and pressure vessel monitoring.
Acqua Claudia
Acqua Claudia is the name of a great Roman aqueduct begun in 38 AD under Caligula, and of a late-Republican residential complex with a mineral spring at Anguillara Sabazia.
Acqua Felice
The Acqua Felice is a papal aqueduct in Rome, built between 1585 and 1587 under Pope Sixtus V, taking its name from his secular name, Felice Peretti.
Acqua Paola
Acqua Paola is a Roman aqueduct restored under Pope Paul V in 1612, known for its monumental terminal fountain on the Janiculum Hill in Rome.
ACS Group (construction company)
ACS Group is a Spanish construction and infrastructure group created in 1997, active worldwide through Turner Construction, Hochtief, CIMIC, and Dragados, with 92% of revenue from international markets.
Activated carbon filtration
Activated carbon filtration is a drinking water treatment process in which water passes through porous carbon that adsorbs dissolved contaminants, including VOCs, taste and odor compounds, and PFAS.
Activated sludge
Activated sludge is a biological wastewater treatment process in which aerated microbial floc converts dissolved material into settleable solids, first described by Ardern and Lockett in 1914.
Adalaj Stepwell
Adalaj Stepwell, also known as Adalaj ni Vav or Rudabai Stepwell, is a five-storey carved stepwell in Adalaj, Gujarat, India, completed in 1499 by Queen Rudabai.
Adaptive reuse
Adaptive reuse is the conversion of an existing building to a new function while retaining its physical fabric, used both as a conversion process and a heritage strategy.
Adit
An adit is a horizontal, walkable mine entrance driven into a hillside for access, ventilation, and gravity drainage, with only one opening to the surface.
Administration of Rome's water supply
The administration of Rome's water supply was run by a senatorial curator aquarum, established in 11 BC, with a staff of about 700 slaves maintaining the aqueducts.
Adrian R. Chamberlain
Adrian R. Chamberlain (1929–2024) was an American civil engineer who served as president of Colorado State University and was elected to the National Academy of Engineering.
Advanced Drainage Systems
Advanced Drainage Systems, Inc. (NYSE: WMS) is an American manufacturer of thermoplastic corrugated pipe for stormwater and onsite wastewater, founded in 1966 and headquartered in Hilliard, Ohio.
Advanced reduction processes
Advanced reduction processes are water-treatment technologies that destroy persistent contaminants such as PFAS by generating short-lived, highly reducing hydrated electrons, usually with UV light and sulfite or iodide.
Advances in Structural Engineering
Advances in Structural Engineering is a peer-reviewed academic journal covering research on civil engineering structures such as bridges, buildings, and offshore platforms, established in 1997 and published by SAGE Publications.
AECOM
AECOM, also known as AECOM Technology Corporation, is an American multinational infrastructure firm founded in 1990 and headquartered in Dallas, Texas, with $16.1 billion in fiscal 2025 revenue.
Aecon Group Inc.
Aecon Group Inc. is a Canadian construction and infrastructure development company headquartered in Toronto; it ranked fifth among Canadian construction companies by turnover in 2024.