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Principal / Revista Virtual / Marzo 2002
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 CONCRETE COMMENTS
Descripción: Wisconsin Concrete Park (and) Conductive Concrete
Versión: Tamaño de archivo: 40.04 Kb
Añadido el: Abr-10-2003 Descargas: 281
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Why Slabs Curl
Descripción: Most slabs on grade curl. Some research has been done over the years to determine why slabs curl and how curling can be reduced or controlled. Unfortunately, because much of that work is so scattered, it hasn’t received the attention it deserves nor has it contributed to a better understanding of why slabs curl. Following is a summary of the research and what it may mean to designers, specifiers, and contractors
Versión: Tamaño de archivo: 372.07 Kb
Añadido el: Abr-10-2003 Descargas: 324
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Oldest Concrete Street in the United States
Descripción: Bellefontaine, Ohio, is home to the United States’ first concrete street. In 1891, as an experiment to improve street conditions, the city council hired George Bartholomew to provide the concrete for an 8-ft segment of pavement, which was designed by James C. Wonders. After this experiment proved successful, the square surrounding the courthouse was also paved , creating the first concrete street.
Versión: Tamaño de archivo: 84.96 Kb
Añadido el: Abr-10-2003 Descargas: 262
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Cautionary Note on Shear Capitals
Descripción: Design of slab-column connections for punching shear can be the factor that governs the thickness of a slab. To achieve an economical design, shear capitals or drop panels are used to increase the punching shear strength of slab-column connections. This article presents experimental results of interior slab-column connection specimens. These include a control slab, and similar slabs that augment the shear resistance by: a shear capital, a drop panels, conventional stirrups and stud shear reinforcement.
Versión: Tamaño de archivo: 152.34 Kb
Añadido el: Abr-10-2003 Descargas: 300
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Sport Utility Vehicles and the Design of Parking Garages
Descripción: The recent shift in consumer trend towards sport utility vehicles (SUVs) and vans has generated wheel loads in excess of current design requirements. Since cracking is undesirable in a garage, its floors are designed for both serviceability and strength. Wheel loads, rather than uniform loads, typically govern the design of slabs and beams supporting small slab areas. This warrants a review of the assumptions used in floor design and an increase in the design wheel load.
Versión: Tamaño de archivo: 350.59 Kb
Añadido el: Abr-10-2003 Descargas: 271
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Why Chemistry Matters in Concrete
Descripción: Why does chemistry matter? It matters because chemistry controls the life span of concrete. Chemistry explains why cement hardens and the interaction between cement and its environment. We will discuss the basic inorganic chemistry of cement and concrete under service conditions. The durability of concrete depends on chemical processes developing out of cement and aggregate compositional factors, curing conditions, and exposure to a variety of environmental effects.
Versión: Tamaño de archivo: 73.24 Kb
Añadido el: Abr-10-2003 Descargas: 295
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White Concrete Reflects Highway Safety
Descripción: The high visibility of white concrete structures enhances driving safety. Departments of transportation are using white concrete for everything from bridge parapets to median barriers. Contractors build white concrete median barriers in the same way as gray ones. Steel reinforcement guards against pieces of concrete being dislodged by a crash, as well as adding to the barrier’s flexural strength.
Versión: Tamaño de archivo: 128.91 Kb
Añadido el: Abr-10-2003 Descargas: 258
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