- isn = "01624075"
- Artículo:
A New Fix for Loose Slab Joints
- Autor:
George Garber
- Resumen:
A new option is available for fixing loose joints in slabs-on-ground. This device relies on a split aluminum cylinder that fits into a vertical core-drilled hole, centered on the problem joint. The cylinder contains a screw-and-wedge mechanism that pushes the cylinder halves apart. An internal spring keeps the cylinder firmly locked in place as the joint opens and closes, within limits. Including drilling the hole, each device can be installed in as little as 10 to 15 minutes and the slab can be immediately placed back in service.
- Página:
38
- Publicación:
Concrete International
- Volúmen:
29
- Número:
11
- Periodo:
noviembre 2007
- ISSN:
01624075
- SrcID:
01624075-2007-11.txt
- Documento número 986368
- Actualizado el martes, 10 de julio de 2018 11:06:01 a. m.
- Creado el martes, 10 de julio de 2018 11:06:01 a. m.
- Enlace directo
- Artículo:
Reliable Air Entrainment
- Autor:
Pieter A. VanderWerf
Douglas Watson
- Resumen:
Because insufficient air content can reduce durability, but excess air content can reduce strength, many concrete producers consider air content fluctuations a major problem. A recently introduced air-entraining agent for concrete is called Miracon Tough Air™. The polymer agent is aerated in a specially designed machine before it is injected into the concrete. The Miracon aeration machine is fully automated for integration into a ready mixed or precast concrete plant operation.
- Página:
42
- Publicación:
Concrete International
- Volúmen:
29
- Número:
11
- Periodo:
noviembre 2007
- ISSN:
01624075
- SrcID:
01624075-2007-11.txt
- Documento número 986369
- Actualizado el martes, 10 de julio de 2018 11:06:01 a. m.
- Creado el martes, 10 de julio de 2018 11:06:01 a. m.
- Enlace directo
- Artículo:
Raising Research Effectiveness
- Autor:
Torbjorn Stenbeck
Johan Silfwerbrand
- Resumen:
The amount of research being conducted has increased dramatically during the last 30 years, but whether or not the effectiveness of this research has increased just as dramatically is debatable. This is an important topic because resources are limited and citizens expect to receive good value for their investments. To initiate a discussion, some of the important issues are raised in this article.
- Página:
47
- Publicación:
Concrete International
- Volúmen:
29
- Número:
11
- Periodo:
noviembre 2007
- ISSN:
01624075
- SrcID:
01624075-2007-11.txt
- Documento número 986370
- Actualizado el martes, 10 de julio de 2018 11:06:01 a. m.
- Creado el martes, 10 de julio de 2018 11:06:01 a. m.
- Enlace directo
- Artículo:
An Investigation of Low-Strength CMU
- Autor:
Hugh Wang
Chenqing Qi
Waltter Lopez
Bill Goodloe
- Resumen:
A concrete masonry unit (CMU) producer recently reported that a batch of their products developed little or no strength and were easily broken during handling. The producer’s staff claimed to have used the same material sources and production processes employed successfully with previous batches. To find the cause of the problem, samples of the defective CMU were examined, and hydration of the cement was investigated using calorimetry tests. Lessons learned from the investigation are presented.
- Página:
53
- Publicación:
Concrete International
- Volúmen:
29
- Número:
11
- Periodo:
noviembre 2007
- ISSN:
01624075
- SrcID:
01624075-2007-11.txt
- Documento número 986371
- Actualizado el martes, 10 de julio de 2018 11:06:01 a. m.
- Creado el martes, 10 de julio de 2018 11:06:01 a. m.
- Enlace directo
- Artículo:
2008 ACI Honors and Awards Program
- Resumen:
Nominations are open for the annual awards of the Institute.
- Página:
23
- Publicación:
Concrete International
- Volúmen:
29
- Número:
12
- Periodo:
diciembre 2007
- ISSN:
01624075
- SrcID:
01624075-2007-12.txt
- Documento número 986372
- Actualizado el martes, 10 de julio de 2018 11:06:01 a. m.
- Creado el martes, 10 de julio de 2018 11:06:01 a. m.
- Enlace directo
