SP909B4E_Foamed-Asphalt-Base-Materials_Report.pdf Dr. Charles W. Schwartz Department of Civil and Environmental Engineering University of Maryland – College Park [email protected] (301) 405-1962 0 100 200 300 400 500 600 Segment B GAB Segment A Ctrl Strip (b) Base Layer 0 500 1000 1500 2000 2500 3000 Segment B GAB Segment A Ctrl Strip Layer ...Foamed asphalt stabilized base (FASB) material is a partially bound material consisting of four phases of aggregate skeleton, air voids, foamed binder, and water. Its mechanical properties and ...

Asphalt-treated bases are often used in new pavements; the materials are available and low- cost, but there is little data on how these materials perform in cold regions. This study investigated four ATB types (hot asphalt, emulsion, foamed asphalt, and reclaimed asphalt pavement) popular for treating base course materials. The researchFoamed asphalt is formed by combining hot asphalt binder with small amounts of cold water. When the cold water comes in contact with the hot asphalt binder it turns to steam, which becomes trapped in tiny asphalt binder bubbles (World Highways, 2001 [1]).The result is a thin-film, high volume asphalt foam with approximately 10 times more coating potential than the asphalt binder in its normal ...

base until a hot mix asphalt base and wearing surface is applied. Some other stabilizing agents include cement, emulsion and calcium chloride. This report shows the detailed investigation to determine the structural strength of foamed asphalt layers. Objective Collect foamed asphalt and HMA samples from sites and determine relevant properties ...Foamed asphalt stabilized base (FASB) combines reclaimed asphalt pavement (RAP), recycled concrete (RC), and/or graded aggregate base (GAB) with a foamed asphalt binder to produce a partially stabilized base material.

Full Depth Recycling-Foamed Asphalt is an on-grade method of pavement rehabilitation that consists of pulverizing the existing asphalt concrete pavement and a portion of the underlying granular base to a maximum depth of 12 inches, mixing and stabilizing the recycled section with a foamed paving-grade asphalt, grading and compacting the ...Foamed asphalt base stabilization is a roadway recycling process in which all of the pavement and some of the underlying material is pulverized and treated with a foamed asphalt additive to produce an improved, stabilized base. This status report presents lessons learned from current usage in California of the base stabilization process called

Foamed Asphalt Stabilized Base Course will be measured and paid for at the Contract unit price per square yard of the specified thickness. Surface area measurements will be based on the specified width of the base and the actual length measured along the centerline of the foamed asphalt stabilized base course. Payment will be full compensation ...Foamed asphalt stabilized base (FASB) combines reclaimed asphalt pavement (RAP) and/or recycled concrete (RC) with a foamed asphalt binder. The pavement structural properties of FASB fall somewhere between conventional graded aggregate base (GAB) and hot mix asphalt (HMA). Therefore, the required thickness of the

Foamed asphalt stabilized base (FASB) combines combinations of reclaimed asphalt pavement (RAP), recycled concrete (RC), and/or graded aggregate base (GAB) with a foamed asphalt binder to produce a partially stabilized base material. The foamed asphalt content is usually too low to fully coat all of the aggregate particles, as is the case in hotFoamed Stabilized Base (FSB) A mixture of foamed asphalt binder and (RAP) or a combination of RAP and recycled concrete. Unlike hot mix asphalt (HMA), the foamed binder does not coat the aggregate particles; it just coats the fines (passing #200 sieve) in the aggregate, which helps serve as a bonding agent to keep the aggregate particles together.