Mixing Sand with Hi-Tech Spall FX and TX

  • Sand Mixed with Hi-Tech Spall-FX and TX

    Mixing Sand with Hi-Tech Spall-FX and TX

  Adding sand to hand mixed Hi-Tech Spall FX and TX has many benefits. It increases the strength of the product, gives it a more natural concrete look, extends the volume of the product and allows more working time. Do not attempt to add sand to material in a cartridge or bulk material in a dual component pump. The following guidelines will give you an idea of the consistency and increase in volume at different sand to material ratios. It is always best to make your own sample to ensure that the product meets the needs of your specific job. All measurements are by volume. We used dry 30 grit silica sand and TX3 for this demonstration. We chose 30 grit silica sand because it works well and is widely available, but other grits can be used. All Hi-Tech spall repair products can be mixed with sand; however, many contractors prefer the additional working time afforded by the FX2, TX2 and TX3.

Ratio: 1:1
Sand: 4 ounces
FX/TX: 4 ounces
Yield: 7.2 ounces (80% increase)

This 1:1 ratio has nearly doubled the volume of the TX3, but is still very thin in viscosity (pourable and self-leveling). This is an ideal mixture for placing into a ketchup bottle and fixing small spalls and pop outs. If you think you may want a thicker mixture, this is a good place to start and then add sand until you reach your desired consistency.

Ratio: 3:2
Sand: 6 ounces
FX/TX: 4 ounces
Yield: 8.8 ounces (120% increase)

This 3:2 ratio has more than doubled the volume of the TX3. It is still pourable and self-leveling, but has a substantially thicker viscosity than the 1:1 mix. This is an ideal mixture for large concrete repairs. Adding any more sand to this would result in a product that may not self-level or properly bond to the substrate.
Ratio: 2:1
Sand: 8 ounces
FX/TX: 4 ounces
Yield: 10 ounces (150% increase)

This 2:1 ratio has increased the volume of the TX3 by one and half times. It is not pourable or self-leveling. Application of a mixture this thick would require a trowel or some other tool. To prevent the material from sticking to the trowel, you can lightly coat the tool with isopropyl (rubbing alcohol) or use a plastic trowel. We recommend you thoroughly test a mixture this thick to ensure it performs as you expect. The mixture must be wet enough that it is able to properly wet into the pores of the concrete and create a proper bond.

 

Quick Tips

• Always make sure the repair area is dry and clear of debris and bad concrete

• Ensure sand is dry and stored in a sealed container

• The grit and color of sand used will affect the final appearance of the repair. For example, light colored 30 grit sand will look like cream finish concrete. Multi colored 12 and 16 grit sand can approximate the look of salt and pepper finish concrete

• Depending on the size, shape and depth of the repair a plastic putty knife or tool may be needed to help move the repair material around

• Broadcast sand over final repair to ensure a consistent finish

• Custom Tinting is available

For additional information call us at (909) 945-5530.