The International Concrete Repair Institute (ICRI) produces 10 distinct concrete profiles formed by various surface preparation methods. Each profile carries a CSP number ranging from CSP 1 (nearly flat) to CSP 10 (very rough; amplitude greater than ¼” [6 mm]).
These chips are designed as a visual and tactile comparator for identifying the degree of surface roughness. The user compares prepared concrete to the CSP chips and reports the chip number that most closely resembles the surface. Many jobs will specify the type of surface preparation required.
The ICRI CSP Chips are approximately 16 square inches (3.5” x 4.5”) and are designed to replicate 10 surface profiles shown below.
Available with or without Technical Guideline (no. 310.2R-2013) Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, Polymer Overlays, and Concrete Repairs prepared by ICRI.
1
Grinding
2
Acid-etched
3
Light Shotblast
4
Light Scarification
5
Medium Shotblast
Medium Scarification
6
Heavy Abrasive Blast
Scabbled/Surface Retarder
7
Heavy Scarification
Handheld Concrete Breaker/Abrasive Blast Cleaned; or High-Pressure Water Jetting
8
9
10
The guide provides owners, specifiers, contractors, and manufacturers with the information required to select and specify the methods for preparing concrete surfaces prior to the application of a protective system or repair material.
CSP
CSPTG
ASTM D8271 documents an alternative to the traditional qualitative method using CSP Chips- digital depth micrometers such as the PosiTector SPG TS. This fully digital method nearly eliminates operator influence on the test, and provides quantitative results that can be downloaded to a PC for reporting. Learn more about the digital method, and how measurements compare with the CSP chips, in this article.
PosiTector SPG TS— A quantitative alternative for measuring surface profile. Learn more.
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