DEPARTMENT OF THE ARMY
U.S. Army Corps of Engineers
Washington, D.C. 20314)1000
31 December 1996
Engineering and Design
USE OF RESIN MODIFIED PAVEMENT
1. Purpose. This letter provides state-of-the-art guidance on
the design and use of resin modified pavement (RMP).
2. Applicability. This Engineer Technical Letter (ETL) is
applicable to all HQUSACE elements and USACE Commands having
military and civil works construction responsibility.
3. References. References providing necessary general
information, background, definitions and design guidance for
resin modified pavements are listed in Appendix A.
a. Description. Resin modified pavement (RMP) is a
composite pavement surfacing that uses a unique combination of
asphalt concrete (AC) and portland cement concrete (PCC)
materials in the same layer. The RMP material is generally
described as an open-graded asphalt concrete mixture containing
25- to 35-percent voids which are filled with a resin modified
portland cement grout. The open-graded asphalt mixture and resin
modified cement grout are produced and placed separately. The
open-graded mixture is produced in a typical asphalt concrete
the open-graded layer has cooled, the grout is poured onto the
porous surfacing and vibrated into the internal voids. The RMP
layer is typically 50 mm (2 in.) thick and has a surface
appearance similar to a rough-textured PCC.
b. Materials and Construction. The open-graded asphalt
mixture is designed to be the initial "skeleton" of the RMP. A
coarse aggregate gradation with very few fines is used along with
a low asphalt cement content (typically 3.5 to 4.5 percent by
total weight) to produce 25- to 35-percent voids in the mix after
construction. The open-graded asphalt mixture can be produced in
a conventional batch plant or drum-mix plant. After placing, the
open-graded asphalt material is smoothed over with a minimal
number of passes (usually 2 or 3) from a small (3-tonne maximum)
(1) The resin modified cement grout is composed of fly ash,
silica sand, cement, water, and a cross polymer resin additive.
The resin additive is generally composed of five parts water, two
parts polymer resin of styrene and butadiene, and one part
water-reducing agent. The grout water/cement (w/c) ratio is