Cracks caused by drying shrinkage of concrete

This time, “cracks due to drying shrinkage” on the slab surface
will repair.

This phenomenon occurs due to the rapid loss of surface moisture during concrete placement.(* This is a common phenomenon especially in the summer when the sun is strong.)

Crack depth is shallow and mostly concentrated in the surface layer.

Since the surface strength was sufficiently maintained in the investigation, we will only improve the appearance.

Before construction

Cracks are concentrated in the part surrounded by chalk.

↓If you look closely, you can see many cracks in the shape of a tortoise shell.

Prepared material

ROYAL W21

Repair Resin 45min white

C Repair Color #3 dark grey

Tone color black/yellow

Construction procedure

1, Make a mixture (5-10 water: 1 Royal W21)

2, After cleaning the surface to be applied, lightly moisten it with a brush.

3, Softly knead the mixture and Repair Resin, and apply a large area with a metal trowel.

4, When it is semi-dry, remove excess material with a scraper.

5, After it has fully cured, rub it well with #600 water-resistant paper until it blends in with the steps and paint marks.

6, Clean the dust with a blower.

7, Adjust the color of C Repair Color.

※Test spray and check the color. Tweak the tone color to match the lightest surrounding color

8, Spray C repair color. In some places, rub with #600 waterproof paper to blend in.

9, Adjust the tone color for patterning. We will prepare 3 to 4 different colors and shades.

※Apply a small amount of the tone color diluted with water to the patterning pad and check the color in an inconspicuous place.

10, Apply a pattern with the pattern pad.

※If the pattern does not match, adjust by tearing the sponge part by hand.

Enlarged image after construction

After construction

Looks much improved.

In addition, since there are cracks in the surface layer, it can be clogged sufficiently by making a paste of fine particle polymer cement (Repair Resin).

If you have any questions, please contact us.

https://con-rep.com

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