Ward R. Malisch Concrete Construction Symposium (Part 2)-Concrete Specifications The Good, The Bad, and The Ugly (PDF)

Concrete Specifications The Good, The Bad, and The Ugly (PDF)

Pdf Summary

The document is a program from the Concrete Convention and Exposition, outlining a presentation titled “Concrete Specifications: The Good, The Bad, and The Ugly” by Michelle L. Wilson from the Portland Cement Association. The focus is on the development and improvement of concrete specifications. The presentation addresses the importance of clear, correct, concise, complete, consistent, and coordinated specifications (the Four Cs and two additional Cs) essential for informing contractors what to do without dictating how to do it unless explicitly necessary.<br /><br />Key references include standards like ACI 318, ACI 301, ACI 311.6, ACI 117, and ASTM C94, which provide guidance on concrete specification. The presentation highlights the necessity to avoid subjective terms and advocate for objective measures to reduce disputes. For instance, ACI 301-10’s surface finish requirements emphasize measurements over opinions, thereby improving consistency and minimizing conflicts.<br /><br />Wilson stresses removing vague phrases and unenforceable terms from specifications, advocating for clarity and objectivity in wording. The presentation includes examples where terms like “immediate” and “even coverage without segregation” are criticized for their ambiguity.<br /><br />The presentation also critiques overly prescriptive requirements, suggesting that specifications allow for flexibility in achieving the desired outcomes without constraining contractors unnecessarily. The goal is to create specifications that clearly define outcomes and necessary performance conditions while acknowledging multiple acceptable methods for achieving these outcomes.<br /><br />In summary, the presentation calls for a balance in specifications to ensure clarity, enforceability, and flexibility. It emphasizes knowing default standards versus optional requirements and highlights continuous improvement in specification wording to enhance project outcomes. Michelle L. Wilson is available for further inquiries, with her contact information provided.

Keywords

Concrete Specifications

Michelle L. Wilson

Portland Cement Association

Four Cs

ACI Standards

ASTM C94

Objective Measures

Specification Clarity

Performance Conditions

Specification Flexibility