Front Steps 6 - How to skip trowel techniques for do it yourself concrete deck coating applications

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Self-Compacting Concrete Applications

The use of self compacting concrete has been encountering a gradual increase ever since a prototype of the concrete developed in the year 1988. Some of the main reasons for employing self compacting concrete are:

To minimize the period of construction.
To ensure structure compaction, particularly when vibrating compaction is tough in confined zones.
To eliminate noise produced due to vibration; this can be particularly effective in concrete product plants.

This just goes to imply that the present state of self compacting concrete is indeed a special one rather than the standard concrete.

A good example of an application of this concrete is the Akashi-Kaikyo (Straits) Bridge anchorages. The bridge that was opened in April 1998 is a suspension bridge that has the longest span in the world, at 1991 meters.

The cast concrete volume that was required for the two anchorages reached around 290,000 m3. A novel construction system that takes complete advantage of this concrete performance was specially introduced for this. The concrete was missed at the batcher plant that was located beside the site and then was discharged out of the plant. The concrete had to be transported 200 meters via pipes to the casting site. Here, there was an arrangement of rows of pipes, about 3 to 5 meters apart. After this, the concrete was cast from gate valves that were located at an interval of 5 meters alongside the pipes.

To ensure that the cast concrete surface level is maintained, the valves were controlled automatically. Subsequently, it was noted that the self-compacting concrete reduced the period of anchorage construction by 20 percent, from 2.5 years to 2 years.

This concrete was also utilized for the wall of a huge LNG tank of Osaka Gas Company. The concrete casting of this wall culminated in June 1998. And the self compacting concrete volume that was used in the tank came to a consolidated 12,000 m3. The fact that self compacting concrete was adopted naturally implies the following:

The lots number reduced to 10 from 14, since the height of one concrete casting lot was increased.

There was a reduction in the number of workers to 50 from 150.

The period of construction of the structure reduced to 18 months from 22 months.

Usually, self compacting concrete is made use of in concrete products to remove vibration noise. The working environment is thus enhanced at plants and it becomes possible for concrete product plants to be situated in urban areas.

In 1996, the annual production of concrete products that make use of self compacting concrete was over 200,000 tons

The undeniable truth is that self compacting concrete requires a lot of care and experience, when compared to conventional vibrated concrete. Personnel at plants definitely require training and the right amount of expertise for successful production and handling of SCC. Initially, it might be necessary to perform several tests than usual in order to learn about the intricacies and skill involved.

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Enhance Beauty and Expand Your Options With Decorative Concrete Applications

With the recent advancements in cementitious applications, homeowners, contractors and managers are no longer constrained by the limitations of standard floor coverings. The beauty of decorative concrete treatments and durability of concrete overlays now enhance your ability to reduce costs, expand design considerations and increase longevity.

If it's time to replace outdated or damaged floor coverings, you may find that there is a serviceable surface underneath your current covering. Older homes may have hardwood floors that can be restored and if your home is built "slab on grade" (concrete) you may have the option of utilizing a vast menu of decorative applications.

Cementitious applications are superior in regards to cleaning, health and wear. If treated properly concrete applications are simple to clean, will resist staining and will not retain dust or other allergens associated with carpeting or other organic coverings. Concrete does not wear as easily as other flooring treatments - it will not tear like linoleum/vinyl flooring, will not gouge as hardwood does, will not cup at seams as Pergo or hardwood can. In addition you will not have to worry about what may be happening beneath the finished surface, hidden damages or water retention, as the finished surface is visible.

Concrete overlays can be applied over concrete or wooden sub- flooring. In water prone areas, such as bathrooms, waterproofing products and a seamless baseboard application can be included to provide long term protection. In areas that are subject to high traffic (entries) or residue (kitchens) the appeal of a cementation finish can be achieved without the hassle of grout lines that require consistent cleaning.

Cementitious surfaces offer a variety of decorative finishes that can be custom tailored to your design specifications. There are near endless color combinations, from very bright color palettes to natural tones. Complex or simple design patterns and textures can also be achieved through stamping, multifaceted applications and hand trowel or cut in details.

For new construction, the utilization of decorative concrete applications can set a project apart from the other listings on the market while decreasing the cost of preparation and materials needed to apply standard floor coverings. When remodeling cementitious surfaces can increase the longevity of applications while providing numerous design options for flooring, walls and countertops. In commercial projects the applications can simplify installation (reduce overall cost), multiply design opportunities, increase longevity and reduce the maintenance for the customer.

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