InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website. This article describes the types of cracks that occur in poured concrete slabs or floors and explains the risks associated with each, thus assisting in deciding what types of repair may be needed.
The History of construction overlaps many other fields like structural engineering and relies on other branches of science like archaeologyhistory and architecture to investigate how the builders lived and recorded their accomplishments. Those fields allow us to analyse constructed buildings and other structures built since prehistorythe tools used and the different uses of building materials. History of building is evolving by different trends in time, marked by few key principles: Neolithicalso known as the New Stone Agewas a time period roughly from BC to BC named because it was the last period of the age before wood working began.
Literary Terms and Definitions: This page is under perpetual construction. It was last upda ted January 5, The term in poetry refers to the use of words that combine sharp, harsh, hissing, or unmelodious sounds. It is the opposite of euphony.
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Sometimes referred to as teenage years, youth, or pubertyadolescence is the transitional period between childhood and maturity, occurring roughly between the ages of 10 and The word adolescence is Latin in origin, derived from the verb adolescere, which means "to grow into adulthood. There is no single event or boundary line that denotes the end of childhood or the beginning of adolescence. Rather, experts think of the passage from childhood into and through adolescence as composed of a set of transitions that unfold gradually and that touch upon many aspects of the individual's behavior, development, and relationships. These transitions are biological, cognitive, social, and emotional. The biological transition of adolescence, or puberty, is perhaps the most observable sign that adolescence has begun. Technically, puberty refers to the period during which an individual becomes capable of sexual reproduction. More broadly speaking, however, puberty is used as a collective term to refer to all the physical changes that occur in the growing girl or boy as the individual passes from childhood into adulthood. The timing of physical maturation varies widely.
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S tonehenge in England, the Great Pyramid of Giza, the Peruvian citadel at Machu Picchu—three wondrous examples of how stone structures can last hundreds or even thousands of years. But though stone is one of the oldest and most durable building materials, it isn't exactly easy to work with. It's heavy, hard to transport, and usually comes in giant chunks, which have to be laboriously cut to shape. Wouldn't it be great if there were a recipe for stone—a kind of gooey cake mixture we could throw together wherever it was needed, simply pressing it into molds to make buildings and structures of any shape or size. Well that kind of "liquid stone" really does exist: Although it sometimes gets a bad press, because many people associate it with brutal urban architecture from the midth century, concrete is the great, unsung hero of the modern, material world. From the Hoover Dam to the Sydney Opera House, you'll find it in the world's tallest skyscrapers, biggest bridges, longest highways, deepest tunnels, and quite probably even under the floor in your own humble little home. Concrete is pretty amazing stuff, but what is it and how exactly does it work?.
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Now engineers are beginning to understand why ancient Roman concrete was so revolutionary. Rome built many of its buildings and monuments with concrete made of lime, volcanic sand, and volcanic rock. An advanced concrete recipe allowed the Romans to constructed magnificent structures that no builder would dare to attempt today. Previous research has already found that Roman concrete was far superior to our own modern concrete, which is made to endure about years. Now a new study by a group of engineers and engineering researchers has discovered the precise recipe that made the Roman concrete endure much longer than concrete used today. The researchers used an ancient recipe written down by Roman architect Vitruvius to mix a batch of mortar. The engineers let it harden for six months and looked at it with microscopes. They found that clusters of a dense mineral form through the Roman process. Interfacial zones are weak links inside the concrete.
It consists of a ring of standing stoneswith each standing stone around 13 feet 4. The stones are set within earthworks in the middle of the most dense complex of Neolithic and Bronze Age monuments in England, including several hundred burial mounds. Archaeologists believe it was constructed from BC to BC.