Industry Standards Guide

Concrete Repair Specifications: ACI, ICRI, and Industry Standards Explained

If you’ve ever reviewed a concrete repair proposal, you’ve likely encountered a jumble of acronyms: ACI, ICRI, ASTM, CSP. For most building owners and facility managers, this “alphabet soup” raises more questions than it answers. What do these standards actually mean? And how do you know if your contractor is following them? This guide breaks it all down in plain English—so you can make informed decisions about your next restoration project.

Reviewed and Certified by Blake Dronen

President, Restoration Systems Inc.

Key Takeaways

ACI (American Concrete Institute) sets structural and engineering standards—the “what” specifications for concrete strength, composition, and design.
ICRI (International Concrete Repair Institute) focuses on repair methods and contractor techniques—the “how” of getting repairs done right.
Concrete Surface Profile (CSP) standards ensure proper surface preparation before coatings or overlays are applied—critical for long-term adhesion.
Midwest freeze-thaw cycles make these standards especially important: water infiltration leads to cracking, which leads to corrosion, which leads to costly structural damage.
Cutting corners on specifications creates repairs that fail prematurely—ask your contractor which standards they follow and verify their approach.

Expert Source: Mike Hintsala, RSI Expert | ICRI-certified specialist and contributor to the ICRI CSP standards development.

Standards at a Glance

Understanding who sets the rules—and what they cover

Organization	What It Covers	Key Takeaway
ACI (American Concrete Institute)	Structural and engineering standards: concrete mix design, strength requirements, reinforcement specifications, and building codes	Defines the engineering “what”—material specs and structural requirements
ICRI (International Concrete Repair Institute)	Repair methods and techniques: surface preparation, application procedures, contractor best practices, and quality control	Defines the contractor “how”—proper repair execution and quality standards
ASTM International	Testing and material standards: how to test concrete strength, measure adhesion, and verify repair material performance	Provides the testing framework—objective verification of results
Industry Best Practices	Regional knowledge, manufacturer specifications, and field-proven techniques for specific applications and climates	Fills the gaps—real-world expertise that standards alone can’t capture

Structural Standards

ACI: The Engineering Foundation

The American Concrete Institute has been setting concrete standards since 1904. When engineers design a parking structure or specify repair materials, they’re referencing ACI codes. These standards address the fundamental questions: How strong does this concrete need to be? What’s the proper mix design? How should reinforcement be placed?

For building owners, ACI standards ensure that any structural concrete work meets established engineering requirements. When your contractor says a repair meets “ACI 318” or “ACI 562,” they’re referencing specific codes that govern structural concrete and repair of existing structures, respectively.

“ACI focuses on structural and engineering standards—the material specifications, strength requirements, and design codes that govern how concrete should perform.”

— Mike Hintsala, RSI Expert

RSI crew performing structural concrete rehabilitation on a Minneapolis parking deck — Parking deck rehabilitation in Minneapolis, MN—structural repairs that meet ACI standards for load-bearing concrete

Precision concrete repair work on Milwaukee commercial structure using ICRI-standard surface preparation — Concrete repair in Milwaukee, WI—proper surface preparation using ICRI Concrete Surface Profile standards

Contractor Standards

ICRI: The Repair Authority

While ACI handles the engineering side, ICRI (International Concrete Repair Institute) focuses on how contractors actually perform repairs. Founded in 1988, ICRI established standards for surface preparation, repair techniques, and quality verification that contractors follow in the field.

One of ICRI’s most important contributions is the Concrete Surface Profile (CSP) system. CSP uses a scale from 1 to 10 to measure surface roughness—essentially how textured a concrete surface needs to be before coatings, overlays, or repair materials will properly adhere. A CSP of 1 is nearly smooth; a CSP of 10 is heavily profiled with significant aggregate exposure.

This matters because improper surface preparation is one of the leading causes of repair failure. Apply a coating to a surface that’s too smooth, and it will peel. Apply an overlay without adequate profile, and it will delaminate.

“We went out and made molds of these different prep levels… I was the guy who was actually telling contractors that this is an acceptable standard, and now I’m here doing it.”

— Mike Hintsala, RSI Expert

Regional Considerations

Why Standards Matter More in the Midwest

In Minnesota, Wisconsin, and across the upper Midwest, concrete faces unique challenges that make proper specifications even more critical. Our freeze-thaw cycles are relentless—water seeps into small cracks, freezes, expands, and forces those cracks wider. Then it thaws, and the cycle repeats, sometimes dozens of times per season.

This isn’t just a surface problem. Water infiltration triggers a chain reaction that can compromise structural integrity. The sequence is predictable: cracks allow water in, water reaches reinforcing steel, steel corrodes, corrosion expands, and that expansion spalls (breaks away) the surrounding concrete. What started as a hairline crack becomes a structural concern. Techniques like concrete crack injection can address these issues when caught early.

The Deterioration Cycle

“Corrosion follows water, water follows cracks.” This simple truth explains why proper concrete repair specifications—especially surface preparation and sealant application—are essential for Midwest structures. Stopping water at the surface stops the entire deterioration process.

Road salt compounds the problem. De-icing chemicals accelerate steel corrosion significantly, which is why parking structures and building exteriors near roadways often show damage faster than structures in milder climates. Following ACI and ICRI standards for chloride protection and waterproofing isn’t optional here—it’s essential.

Common Problems

What Happens When Specifications Are Ignored

The consequences of cutting corners on concrete repair are rarely immediate—but they’re always expensive. When specifications aren’t followed, repairs that should last 15-20 years might fail in 3-5. Low-bid contractors often cut corners on specifications. And when they fail, you’re not just paying for repairs again; you’re often paying for more extensive damage that developed under the failed repair.

Surface preparation shortcuts are among the most common problems. Some contractors skim over joints or fail to remove deteriorated concrete to proper depth before applying new material. The result? New concrete or coatings that don’t bond properly and eventually delaminate, peel, or crack.

Improper joint treatment is another frequent issue. Expansion joints need room to move with temperature changes. When they’re filled improperly or sealed without proper backing, they crack—and those cracks become water entry points that restart the deterioration cycle.

“If you’re skimming joints or not going to proper depth, you’re just putting a band-aid on the problem. It might look good for a while, but it won’t last.”

— Mike Hintsala, RSI Expert

Professional parking deck repair in Green Bay showing proper concrete removal and preparation techniques — Parking deck repair in Green Bay, WI—proper depth removal and surface preparation prevents premature failure

Practical Guide

Questions to Ask Your Concrete Repair Contractor

Use these questions to verify your contractor understands and follows industry standards

“What ACI or ICRI standards will this repair follow?”

A qualified contractor should be able to cite specific standards—like ACI 562 for structural repairs or ICRI guidelines for surface preparation. Vague answers suggest they may not be following established protocols.

“What Concrete Surface Profile (CSP) are you targeting for this application?”

Different coatings and overlays require different surface profiles. Your contractor should know the manufacturer’s CSP requirements and have a plan to achieve and verify that profile.

“How will you prepare the surface before applying the repair material?”

Look for specific methods: shotblasting, scarifying, grinding, or hydro-demolition. The answer should match the scope of repair—a simple overlay needs different prep than a structural repair.

“What’s your approach to removing deteriorated concrete around reinforcing steel?”

Proper repair requires removing concrete behind corroded rebar—not just patching over it. Ask about their depth requirements and how they treat exposed steel before new concrete is placed.

“How do you handle expansion joints and control joints?”

Joints need to accommodate movement. Your contractor should explain their joint preparation, backing materials, and sealant selection—not just fill them with caulk and call it done.

“Do you hold any ICRI certifications or training credentials?”

ICRI offers certifications for concrete surface repair technicians and inspectors. While not legally required, these credentials indicate a commitment to industry best practices and continuing education.

Frequently Asked Questions About Concrete Repair Standards

ACI (American Concrete Institute) focuses on structural and engineering standards—material specifications, strength requirements, and design codes. ICRI (International Concrete Repair Institute) addresses repair methods and contractor techniques—surface preparation, application procedures, and quality control. Think of ACI as the “what” (material specs) and ICRI as the “how” (repair execution).

Concrete Surface Profile (CSP) is an ICRI standard that measures surface roughness on a scale of 1 to 10. CSP 1 is nearly smooth; CSP 10 has significant aggregate exposure. Different coatings and overlays require specific CSP levels for proper adhesion. Applying a coating to a surface with the wrong profile is one of the leading causes of repair failure—coatings peel from surfaces that are too smooth, and overlays delaminate without adequate texture.

Midwest freeze-thaw cycles create unique challenges for concrete structures. Water seeps into cracks, freezes, expands, and forces cracks wider—sometimes dozens of times per season. Combined with road salt that accelerates steel corrosion, improperly repaired concrete deteriorates faster here than in milder climates. Following ACI and ICRI standards for waterproofing and chloride protection isn’t optional in Minnesota and Wisconsin—it’s essential for repairs that last.

Ask specific questions: Which ACI or ICRI standards will this repair follow? What CSP are you targeting? How will you prepare the surface? A qualified contractor should cite specific standards like ACI 562 (structural repairs) or ICRI guidelines for surface preparation. Also ask about ICRI certifications—while not legally required, they indicate commitment to industry best practices. Vague or evasive answers are a warning sign.

Repairs that should last 15-20 years may fail in 3-5 years. Common shortcuts include inadequate surface preparation (coatings that peel or delaminate), insufficient deteriorated concrete removal (patches that don’t bond), and improper joint treatment (cracks that allow water infiltration). When repairs fail, you pay twice—for the original work and for fixing the damage that developed underneath.

ACI 562 is the “Code Requirements for Assessment, Repair, and Rehabilitation of Existing Concrete Structures.” It provides the engineering framework for evaluating damaged concrete, selecting appropriate repair strategies, and specifying materials that meet structural requirements. When a contractor references ACI 562, they’re following established engineering codes for structural concrete repair—not just patching over visible damage.

Concrete Repair Done Right—By the Standards

At Restoration Systems, our team doesn’t just follow ACI and ICRI standards—we helped write them. With craftsmen who bring decades of hands-on experience and deep knowledge of Midwest construction challenges, we deliver repairs that last. Let’s discuss your project.

Request a Consultation Explore Our Services

Serving Minnesota, Wisconsin, and the upper Midwest since 1997. LECET Award of Excellence recipient.