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The test is carried out using a metal mould in the shape of a conical frustum known as a slump cone or Abrams cone, that is open at both ends and has attached handles.The tool typically has an internal diameter of 100 millimetres (3.9 in) at the top and of 200 millimetres (7.9 in) at the bottom with a height of 305 millimetres (12.0 in).The cone is placed on a hard non-absorbent surface.
Creep and shrinkage of concrete are two physical properties of concrete. The creep of concrete, which originates from the calcium silicate hydrates (C-S-H) in the hardened Portland cement paste (which is the binder of mineral aggregates), is fundamentally different from the creep of metals and polymers.
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
The fancy kitchens and fireplaces that were so important to buyers during the housing boom are going out of style, according to Styled, Staged & Sold, a blog offered by Realtor.org.According to ...
New home sales dropped 17.3% in October from the previous month to a seasonally adjusted rate of 610,000 units, according to Census Bureau data released on Tuesday. Analysts surveyed by Bloomberg ...
A young North Carolina woman was doused in gasoline and set on fire by a sick suspect who then fled — leaving her heartbroken mother wondering, “How could they do this to my baby?”
Self-consolidating concrete or self-compacting concrete (SCC) [1] is a concrete mix which has a low yield stress, high deformability, good segregation resistance (prevents separation of particles in the mix), and moderate viscosity (necessary to ensure uniform suspension of solid particles during transportation, placement (without external compaction), and thereafter until the concrete sets).
Homes stayed on the market longer in December, at an average of 29 days, up from 25 days in November. The share of all-cash sales rose to 29% from 27% in November.
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