1. isn = "01624075"
Se encontraron 3051 resultados.
Artículo:

Management of Cracks

Resumen:

When concrete elements are restrained by base friction or lateral stiffness of support elements, cumulative strains arising from shrinkage and temperature changes can cause cracking. It is possible to provide contraction joints that minimize cracking, yet do not interfere significantly with construction schedules. By detailing contraction joints, the engineer can place cracks where they have minimal effect on structural performance; productivity during construction of elevated floors can be improved; and large placements can be avoided

Página:

35

Publicación:

Concrete International

Volúmen:

33

Número:

7

Periodo:

Julio 2011

ISSN:

01624075

SrcID:

01624075-2011-07.txt

  • Documento número 986803
  • Actualizado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Creado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Enlace directo
Artículo:

Performance of Macrofiber-Reinforced Concrete in a Sidewalk Overlay

Resumen:

A 50-year-old sidewalk was crushed and left in place as the base for a new concrete overlay reinforced with macrosynthetic fibers. Microsynthetic fibers, typically added in lower volumes, are intended to reduce plastic shrinkage. The heavier macrofibers, typically added in higher volumes, provide distribution of drying shrinkage stresses. This results in many fine, tight microcracks and control joints that open less and offer better resistance to impact and fatigue stresses. The sidewalk’s performance over its first four years is reported

Página:

40

Publicación:

Concrete International

Volúmen:

33

Número:

7

Periodo:

Julio 2011

ISSN:

01624075

SrcID:

01624075-2011-07.txt

  • Documento número 986804
  • Actualizado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Creado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Enlace directo
Artículo:

What’s Up Down Under and Elsewhere?

Resumen:

After 100 years, the American Concrete Institute leads the world in concrete technology, affording a sound basis in published guides for high-performance industrial concrete floors meeting the highest serviceability standards. In discussing high-performance concrete, the author describes a prototype specification. The hallmarks of this specification are the optimization of aggregate gradations and the minimization of water, embodied in the principle that exposed interior slab-on-ground concrete is in a special high-performance category, distinguished by lowest achievable shrinkage characteristics and highest serviceability standards—distinct from other usages where strength alone governs

Página:

45

Publicación:

Concrete International

Volúmen:

33

Número:

7

Periodo:

Julio 2011

ISSN:

01624075

SrcID:

01624075-2011-07.txt

  • Documento número 986805
  • Actualizado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Creado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Enlace directo
Artículo:

Student Fellowships and Scholarships

Resumen:

For the 2011-2012 academic year, the ACI Foundation has awarded eight Fellowships, six Graduate Scholarships, and one Undergraduate Scholarship

Página:

25

Publicación:

Concrete International

Volúmen:

33

Número:

7

Periodo:

Julio 2011

ISSN:

01624075

SrcID:

01624075-2011-07.txt

  • Documento número 986806
  • Actualizado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Creado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Enlace directo
Artículo:

Evaluation of Concrete Mixtures with High Slag Cement Contents

Resumen:

The resistance to chloride penetration is one of the most important measures of the durability of concrete. Results are presented from a study of the chloride resistance of concrete with high-volume slag cement at early ages. Charge passed (ASTM C1202) and chloride penetration coefficient (NT BUILD 443) were studied at early ages by heat curing to a maximum temperature of 75°C. The results show a good correlation between charge passed and chloride penetration coefficient between standard curing and heat curing

Página:

51

Publicación:

Concrete International

Volúmen:

33

Número:

7

Periodo:

Julio 2011

ISSN:

01624075

SrcID:

01624075-2011-07.txt

  • Documento número 986807
  • Actualizado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Creado el martes, 10 de julio de 2018 11:06:04 a. m.
  • Enlace directo