PCC Joint Sealants (JS) and HMA Crack Sealers (CS)

PCC Joint Sealants (JS)
Joint Sealants are commonly used to protect and seal Portland Cement Concrete (PCC) pavement joints. Under this NTPEP evaluation program, both hot-poured and cold-applied joint sealant materials are field tested for three years and laboratory tested according to a variety of ASTM specified test methods.

Moisture is a key ingredient in the development of many durability-related distress types. As a result, these distress types are often observed to be much more severe at joints and cracks, where moisture can penetrate the concrete from several surfaces. Sealing joints and cracks can help reduce the amount of infiltrated water. However, the effectiveness of sealing depends on several issues:

  • How much water will be prevented from infiltrating by sealing the joint or crack?
  • What other sources are contributing moisture and what’s the volume of this water?
  • How long will the sealant be effective at reducing the infiltration of water?

It is impossible to completely eliminate the intrusion of moisture at joints and cracks, especially for an extended period of time. A Minnesota study found that the amount of infiltrated water (measured using tipping buckets at drainage outlets) returned to the same levels within 2 weeks after resealing (Hagen and Cochran 1995). This confirms that moisture can continue to penetrate the concrete at joints and at other locations, making this approach a short-term solution under the best of circumstances. (SOURCE: FHWA/TFHRC)

HMA Crack Sealers (CS)
AASHTO is pleased to announce the launch of a coordinated evaluation of Crack Sealers for HMA pavements under the auspices of its National Transportation Product Evaluation Program (NTPEP).

Crack Sealers are commonly used to protect and seal Hot Mix Asphalt (HMA) pavement cracks from moisture and other deleterious material. Under this NTPEP evaluation program, the sealers are field tested for three years and laboratory tested according to a variety of ASTM specified test methods.

The NTPEP Technical Committee responsible for authoring the Project Work Plan for both Joint Sealants and Crack Sealers convenes yearly at the NTPEP National (Annual) Meeting. During this working meeting, the Project Work Plan is discussed, changes made, and shortly thereafter balloted for adoption. Improvements are immediately implemented in the next available testing cycle. The work plan can be found by clicking on the “Documents” tab above. When compared to other standards development exercises, the NTPEP process is agile, effective, and efficient.

NTPEP Designated Labs:

JS:

  • North Carolina Department of Transportation
  • Minnesota Department of Transportation

CS:

  • ​Minnesota Department of Transportation

NTPEP - PCC Joint Sealants and HMA Crack Sealers


Committee Name:
NTPEP-Technical Committee on Crack Sealer and Joint Sealer
Sort By:
Default
Individual Name
Email Address
Agency Name
Designation
Member Type

User Guide
NTPEP JS-CS User Guide ​

Work Plan
NTPEP tests products according to a Project Work Plan, which describes the laboratory and/or field test protocols used to conduct the evaluation. The Project Work Plan is a consensus-based document and includes peer review and input from industry experts. Each Project Work Plan is adopted after receiving at least two-thirds affirmative support from 52 AASHTO member states. The Project Work Plan is the basis for host states to conduct their testing and evaluation. When implemented by state DOTs, their own state standard specifications may supersede the NTPEP Project Work Plan. Industry is advised to be aware of state-level requirements, which may supersede basic NTPEP testing.

Project Work Plan for Evaluation of Portland Cement Concrete (PCC) Pavement Joint Sealant Material​

Project Work Plan for Evaluation of Hot Mix Asphalt Crack Sealing and Filling Materials

Please go to NTPEP DataMine.

Please go to NTPEP DataMine.