Fly ash has numerous applications in highway engineering applications besides building material in construction industry. Fly ash cement grouts are used for sealing voids beneath pavement slab sections due to the good 28 days unconfined compressive strength of the grout as well as durability of the repaired pavement section. Relatively small voids beneath the pavement slab are sealed by using fly ash cement grouts. The strength profile for grouts differentiates them from flowable fill materials. The course material is based entirely on FHWA-IF-03-019 Technical Report Chapter Number 9 of Fly Ash facts for Highway Engineers.

At the conclusion of this course, the learner will have a better understanding about Fly Ash Grouts for Pavement Subsealing as well as an understanding of the following topics:

• The vital role of fly ash cement grout mixture as a sealing material for pavement sections
• Various fly ash cement grout mix designs
• Various specification requirements and testing standards of fly ash cement grout for better performance
• Quality control and quality assurance procedures to produce quality fly ash cement grouts for pavement subsealing