In Portland cement concrete (and other hydraulic cement concretes), when the aggregate is mixed together with the dry cement and water, they form a fluid mass that is easily molded into shape. The cement reacts chemically with the water and other ingredients to form a hard matrix which binds all the materials together into a durable stone-like material that has many uses. Often, additives (such as pozzolans or superplasticizers) are included in the mixture to improve the physical properties of the wet mix or the finished material. Most concrete is poured with reinforcing materials (such as rebar) embedded to provide tensile strength, yielding reinforced concrete.
Abstract and concrete are classifications that denote whether a term describes an object with a physical referent or one with no physical referents. They are most commonly used in philosophy and semantics. Abstract objects are sometimes called abstracta (sing. abstractum) and concrete objects are sometimes called concreta (sing. concretum). An abstract object is an object which does not exist at any particular time or place, but rather exists as a type of thing, i.e., an idea, or abstraction. The term 'abstract object' is said to have been coined by Willard Van Orman Quine. The study of abstract objects is called abstract object theory.
The type-token distinction identifies physical objects that are tokens of a particular type of thing. The "type" that it is a part of, is in itself an abstract object. The abstract-concrete distinction is often introduced and initially understood in terms of paradigmatic examples of objects of each kind:
An audio engineer works on the recording, manipulation, mixing, reproduction, and reinforcement of sound. Audio engineers work on the "...technical aspect of recording—the placing of microphones, the turning of pre-amp knobs, the setting of levels. The physical recording of any project is done by an engineer... the nuts and bolts." Many audio engineers creatively use technologies to produce sound for film, radio, television, music, electronic products and computer games. Audio engineers also set up and operate sound reinforcement systems for concert, corporate, theatre, sporting and other events.
Audio engineering concerns the creative and practical aspects of sounds including speech and music, as well as the development of new audio technologies and advancing scientific understanding of audible sound.
The Cal Poly Pomona College of Engineering is the engineering college at California State Polytechnic University, Pomona (Cal Poly Pomona) located in Pomona, California, United States. With over 5,600 undergraduate students (as of fall 2015), it is the largest engineering college in Southern California, the second largest college of engineering in the California State University system, and the seventeenth largest engineering college in the United States. In 2013 U.S. News & World Report ranks Cal Poly Pomona's undergraduate program 14th in the nation (for Master's-granting universities), and mentions that Cal Poly Pomona "has one of the top ranked engineering programs, and graduates roughly 1 of every 14 engineers in the state of California."
Because of the hands-on approach to academics and undergraduate focus, the college of engineering at Cal Poly Pomona is among the most selective engineering colleges in the nation and most of its departments are currently declared impacted (hold stringent standards for admissions). For fall 2015, the college admitted 45.3 percent of its total freshmen applicants who held an average unweighted GPA of 3.72 (out of 4.00) and SATs of 1178 (out of 1600), making the college admissions process statistically comparable to the University of California campuses at Davis, Irvine, and Santa Barbara.
Conventional engineering approaches founded on. concrete walls are not working there or in many other parts of Scotland... The old way of “engineers rule” will no longer do ... Sponsored ... WEATHER ... Flood risk rises with more of Scotland under concrete ... .
I was placed in a cross training program that allowed me to work on the engineering side of construction. During my training, I was able to learn how to build concrete structures, such as cross structures, concrete paving, bridges and overpasses, during the construction of the ...
Stop the madness ... The quality of life will deteriorate to the point of no return ... More pollution ... The material is riskier than concrete but developers persist.” ... Engineers, however, state there is very little room for error ... Most structural engineers agree that concrete construction offers the strongest assurances of withstanding powerful winds ... 1 ... 2.
Drexel researchers are developing a structural fiber system that could one day enable damaged concrete structures to repair themselves ... Researchers at Drexel University are experimenting with imbuing concrete with living organisms to extend the building material’s lifespan ... In recent tests, the concrete “healed” itself within two days.
The District of North Vancouver is being sued by a pair of homeowners alleging district inspectors signed off on shoddy construction and engineering ... When they moved in, however, they noticed loose railings and drywall cracks, prompting them to hire a structural engineer.
The five-bedroom abode was the subject of a cover story in the fall 2020 edition of “atHome” magazine, a Greenville-based publication which detailed how Ridgeline Construction engineered such unique touches as a floating wood and steel staircase and freestanding fireplace with a suspended concrete hearth.
Army Corps of Engineers, led our group ... Construction will include an engineered concrete channel with electric barrier, underwater acoustic deterrent, air bubble curtain and an automated barge clearing deterrent (basically blowing out fish hidden or trapped between or in barges).
Two major earthquakes and 130 years later, the Crystal Springs Dam has finally been honored with a National Historic Civil EngineeringLandmark designation, recognizing the nation’s largest concrete structure of its era for its innovative construction ... blocks of concrete.
Senior project engineer Ryan Kern of Anderson, Eckstein & Westrick, Inc., the city’s engineering firm, said due to a sharp rise in the cost of concrete, the bids for the second part of the Modern 9 project were 27% higher than they were for phase one ... “We are finding that the majority of the increases are on the concrete items,” said Kern.
Engineering consultants determined that some of the old concrete slope on the lake side is still doing its job, and it does not need to be replaced, said Mark Snyder, vice president of engineering with the water company. Concrete is protected when it is submerged underwater ... An embankment near the spillway is armored with concrete to protect it.
Last week, IndyCar scrapped plans for testing this week that would've given six teams their first shot to run the unit, the first concrete move hinting that the series and its engine manufacturers would struggle to have the device in each teams' hands -- with the proper number of backup devices -- by March 10.
Make WallsStoneAgain In The Atlantic , Hannah Kirshner notes that concrete has a big carbon footprint and argues for greater reliance on an older method ... But building more stone walls would mean relying on traditional craftsmanship over modern engineering ... A concrete retaining ...
Where the water leaked the worst and damaged property, the district plans to line thousands of feet of canal with a plastic-type liner and then cover that with concrete, said JustinDahl, the district's general manager. He said the district has hired engineers to also consider other remedies to prevent further flooding next year ...Note to readers.
A 1908Japanese civil-engineering textbook describes stone walling as an “extremely crude construction method.” Concrete, by contrast, was all the rage from Paris to Cincinnati; it is smooth and uniform, and can be poured into almost any shape. A wall made of concrete can be engineered mathematically and then executed by less skilled workers.
Aerial views of the South 4230 road in CountyDistrict 3 show the scope of the project that has restored access for residents of the area. DronePilotAnthonyFirst ... This project consisted of the construction of pre-engineered, pre-cast, reinforced concrete box culverts, stacked concrete block wing wall sections and rip-rap ... .