Concrete PCF: Plastic Column Form, 16in Diameter, 8ft

Concrete PCF: Plastic Column Form for Concrete Forming, 16in Dia, 8ft

What is PCF

Pounds per cubic foot (PCF) is a important measurement in the construction industry when working with lightweight concrete. This measurement helps engineers and builders determine the density, weight and strength of various materials. Lightweight concrete with lower PCF than traditional samples has many advantages in building design. With a typical density of 90-115 PCF, lightweight concrete reduces the dead load on the structure and allows for more creative and innovative designs. This reduction in weight not only enhances the structural integrity but also saves on materials and labor. Understanding and using PCF correctly can lead to stronger, more efficient and cost effective construction projects.

Benefits and Features

The benefits of using lightweight concrete are many. One of the biggest is the significant weight reduction which means cost savings in materials and labor. Lightweight concrete can also be engineered to have better insulation properties, reducing heat transfer and energy consumption in buildings. For example, using slate lightweight aggregate can improve thermal insulation while maintaining the structural integrity of the build. The unit weight of lightweight concrete can be controlled precisely by adjusting the amount of lightweight aggregates, so engineers can customize the material to meet project requirements. Cellular concrete, made with preformed foam, is another option, providing excellent thermal and acoustic insulation. These features make lightweight concrete a versatile and valuable material in modern construction.

PCF Specifications and Installation

Proper specifications and installation is key when working with lightweight concrete. Quality control is important, measuring the material’s density and strength to meet required standards. Typically lightweight concrete is designed to have a density of 100-110 PCF but this can vary depending on the application and project requirements. Engineers need to consider several factors to determine the right mix design, including the type and amount of lightweight aggregates, amount of preformed foam and the desired equilibrium density. Following proper installation procedures and strict quality control measures ensures lightweight concrete structures meet the required standards for strength, durability and performance. Geotechnical applications such as foundation design and soil stabilization also benefit from lightweight concrete’s ability to reduce weight and pressure on the soil, improving stability and minimizing settlement. By following these guidelines, builders can optimize the performance and life of their lightweight concrete projects.

FAQ

How high can I pour the Plastic Column Form (PCF)? Not the height, but how fast should you pour. Deslauriers recommends not to exceed 1200psf or an 8 foot liquid head at 70° F. Standard practices limit free fall to a max of 5 feet. How many reuses can I get? The actual number of reuses of the PCF is dependent upon various jobsite conditions. Higher liquid head, higher rates of pour, excess vibration, drilling of holes, and rough handling puts more stress. These stresses and the severity of same can affect the reusable life.

Why are there two sets of holes on the vertical flanges of the Plastic Column Form? There were several reasons for this. The inner 3 hole pattern is for higher pours (4 feet or more). The outer 2 hole pattern is for shorter pours thus saving labor. The outer holes along with the center vertical rib allows for bracing.

Can I cut the Plastic Column Form to a custom size? Yes. The Plastic Column Forms can be cut between the double flange at the 8 foot level with a hand saw or a Sawzall and still be used back to the 8 foot level. These are marked at one foot intervals and can be cut anywhere; however once they are cut other than the 4 foot double flange; they cannot be used back to an 8 footer. You can also explore custom sizes of steel column forms for a smooth and durable finish.

Can the Plastic Column Forms be used for a bull-nosed application? No. The pressure exerted by the length along with the rest could cause blow-out to occur. Deslauriers recommends using a steel column form for this purpose.

How do you brace the Plastic Column Form (PCF)? Same as a fiber tube, use a template at the bottom and plumb with a wood 2 x 4 or turnbuckle.

When can you tell if the Plastic Column Form (PCF) is approaching its usable limit? Good indicators are enlargement of bolt holes, any cracks or splits on body or ribs and any noticeable separation of vertical flanges during a pour. Always inspect for any damage or cracks before each use. If unsure, do not use.

Are the horizontal ribs strong enough to use as a ladder? No. The ribs are not designed for this type of point loading. Further, standard safety regulations prohibit this activity. Always use proper ladders as specified by OSHA, ANSI, etc.

Does sunlight affect the Plastic Column Form (PCF)? As with any plastic, long term ultraviolet light exposure breaks down plastic properties. Even with UV inhibitors, this process is merely slowed. If you expect to store the PCF for a long period of time, place in the shade, or better yet, covered will protect the plastic from damaging UV.

How do you clean the Plastic Column Form (PCF)? First, a light coat of release will help prevent buildup. To clean, we suggest muriatic acid or light power wash.

Can power tools be used to tighten bolts? Yes, but carefully. Over-tightening the bolts can cause the bolt head or nut to dig into the flange creating a possible weak spot. When possible hand tighten or use a washer as a backup.

How do you attach the Plastic Column Form (PCF) to a fibre tube? The simplest method is to cut a 3" to 4" section of horizontal flange from the PCF. Use this unit to clamp onto the top of a tube. Bolt a section of PCF to this "clamp" and you have a unit that can be used over and over to secure a PCF to a tube.

Can attachments be nailed to a Plastic Column Form (PCF) or should you first drill a pilot hole? The form may develop a split if attempting just nail, thus drilling is recommended.

What about using an external vibrator on the Plastic Column Form (PCF)? No, this could damage it. Additionally, care should be taken when using an internal vibrator so that it does not to come in contact with the sides.