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.
Letters with merit came from Montrose citizens, veterans, farmers, livestock and agriculture producers, qualified professional geologists and qualified physical engineers, biologists, real estate agents, asphalt and concrete business owners, business owners, property owners, ...
Today's trip down memory lane stops in several areas of BC ... But this week, Arseneault is doing things a little differently ... The 629-metre long tunnel was considered an engineering marvel, and was the first rectangular reinforced concrete immersed traffic tunnel in North America and second of its kind in the world ... ....
An unexpected ancient manufacturing strategy may hold the key to designing concrete that lasts for millennia. The ancient Romans were masters of engineering, constructing vast networks of roads, aqueducts, ports, and massive buildings, whose remains have survived for two millennia.
Infrastructure and engineering firm Megawide Construction Corp ... Megawide said it builds an onsite plant for precast molding and concrete batching. It also innovates through proprietary engineering technologies like precast which enables quicker turnaround times, requires less manual labor during construction and lowers long-term project costs ... ....
“As part of that, the city engineer and public service director asked that they include an option to make that bridge more aesthetically pleasing.” ... The alternate bids will include a black powder coating for the bridge’s railing and staining work to make the concrete look like real boulders, said CityEngineerDouglas Courtney ... 26 ... 18 meeting ... ....
... concrete while having just as much scratch resistance as the original Gorilla Glass Victus ... But the most reassuring thing about Victus 2 is simply that it’s more likely to survive a drop onto concrete – which according to Corning is the world’s most abundant engineered material.
Sydney Brown... Materials alone will cost $158,455 to pay for longer-lasting, industrial-grade tracks as well as switching the decaying wood ties for stronger concrete ties ... People are also reading… ... William Burton, the port's director of facilities and engineering, said concrete ties have a longer lifespan and require less longterm maintenance.
As pressure mounts on shipping to deliver more concrete action to cut emissions Haralambos J Fafalios, the GSCC chairman said. “We are still awaiting engine and shipbuilders to come up with real green solutions.” ... Related... He said ... Related ... He said the industry is “still awaiting engine and ship builders to come up with real green solutions” ... He said ... .
The Diesel Mechanic program has several engines that surround an open classroom space where students can learn both the academic and hands-on sides of the trade. The class is already equipped with engines that students will come across daily when working in their field.
Gorilla Glass Victus 2’s new glass composition delivers improved drop performance on rough surfaces like concrete, while preserving the scratch resistance of Corning® Gorilla® Glass Victus® ... By better surviving drops on rough surfaces like concrete, the world’s most abundant engineered material, it redefines tough for consumers and OEMs.
Pacific Coast Highway was open to traffic in both directions Wednesday, Jan. 25, afternoon, following extensive cleanup after sea water flooded onto the highway during high tides the previous morning ...Show Caption ... Engineers are expected to come out early next week to assess the stability of the lots, which are concrete built on top of sand, he said ... .
He revved the engine as the boat sped around a bend and up a riffle ...Last year, Weisheit and other environmentalists announced a contest, inviting engineers and engineering students to submit proposals for reengineering Glen Canyon Dam and rewilding the river ... He cut the engines and let the boat drift to a thicket on the bank.
PSIX), a leader in the design, engineering and manufacture of emission-certified engines and power systems, recently announced a new professional collaboration with AllenEngineering, a global provider of concrete and related equipment for professional contractors ...Concrete 2023.
Ronan Keenan, research director at Perforce, said the concepts behind platform engineering have been used on a small scale at large technology organisations for many years, but platform engineering provides a more concrete focus. “The concept is about building self-service capabilities which engineers and developers can use.
Atlas engineers and technical staff will conduct material and vendor validation, concrete mix design and batch plant certifications, field testing of soils and concrete to ensure compliance and safety with all NuclearQuality Assurance standards.