Decorative Concrete - Pinstripe Aggregate

The pinstripe aggregate method uses corrugated craft board to help achieve a pinstripe pattern of exposed and unexposed aggregate.

The craft board creates a corrugated pattern in the surface of the concrete. After the concrete is set, the hills are ground down to expose the aggregate, but the valleys remain un-ground, creating contrasting lines of exposed aggregate and lines of no exposed aggregate.

In this instructable, I also added some white paint to the valleys to help highlight the effect.

Safety:

• dust mask
• latex gloves

Concrete:

• white cement
• blue sand
• water

Form:

• larger diameter tube
• smaller diameter tube
• corrugated craft board
• spray glue

Other:

• disposable cups
• popsicle sticks
• paint brush
• white paint
• knife sharpening stone (or other sanding/grinding tools)

Refer to the above instruction video for a demonstration of the method.

If you would like any further clarification or support on any of the steps, please feel free to leave me a comment and I will help as best as I can.