Notes/Preview
The contents of this course include two recorded presentations from the ACI 2015 Spring Convention:
• Examining the Role of Moisture in D-Cracking of Concrete Pavement by Thomas L. Rewerts, Thos. Rewerts & Co. LLC
• Iowa’s Approach to Reducing the Risk of D-Cracking by Peter C.Taylor, CP Tech Center
INSTRUCTIONS: Study the materials included in this module. Then, complete and pass the corresponding 10-question quiz with a score of 80% or higher to receive a certificate for 0.1 CEU (equivalent to 1.0 PDH). This online course is not approved for credit with the Florida Construction Industry Licensing Board (CILB).
Continuing Education Credit: 0.1 CEU (1 PDH)
Access Period: 30 days
Description
This course will cover various aspects of D-cracking of concrete pavement: pavement cracking near contraction and construction joints that follows the joints. D-cracking in concrete pavement is a contentious and far-reaching issue that usually results in earlier-than-expected deterioration of concrete pavements. D-cracking is a result of critically saturated concrete exposed to frequent freezing-and-thawing cycles and, combined with frequent traffic, causes spalling and opening of concrete pavement joints over time.
This course contains two presentations. The first presentation details a study of a severe D-cracking case in which a pavement slab was critically saturated and exposed to freezing, thawing, and heavy wheel traffic. The presented D-cracking studies include photo-elapsed images, petrographic examinations, and reasons why the D-cracking occurred; the presenter also discusses the failure of preliminary patching repairs. The second presentation discusses D-cracking as an issue with the quality of aggregates in concrete pavement mixtures and identifies certain properties of aggregates that make them susceptible to D-cracking based on previous known experience. Three tests are presented to help identify and prequalify the quality of aggregates that should be used in pavements to reduce D-cracking.
Document Details
Publication Year: 2016
ISBN:
Categories: Cracking
Formats: Online Learning
Table of Contents
Learning objectives:
1. Describe current industry thinking on the causes of D-cracking in concrete pavements.
2. Understand field and petrographic investigation methods that help concrete professionals to evaluate D-cracking problems.
3. Describe test methods used by the Iowa Department of Transportation to qualify coarse aggregates that have been proven in minimizing D-cracking.
4. Explain the role that moisture retained in pavement joints and slabs and critical saturation play in the formation of D-cracking in concrete pavements.
ERRATA INFO
Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the ACI Collection. For a listing of and access to all product errata, visit the
Errata page.
Return/Exchange Policy
Printed / Hard Copy Products: The full and complete returned product will be accepted if returned within 60 days of receipt and in salable condition. A 20% service charge applies. Return shipping fees are the customer’s responsibility.
Electronic /Downloaded Products & Online Learning Courses: These items are not eligible for return.
Subscriptions These items are not eligible for return.
Exchanges: Contact ACI’s Customer Services Department for options (+1.248.848.3800 – ACICustomerService@concrete.org).
Quantity Discounts
This item qualifies for quantity discounts. Discounts are reflected in the shopping cart.
| Quantity |
Discount |
| 10 - 19
| 25% |
| 20 - 49
| 35% |
| 50+ copies
| 50% |