A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Base Stabilization with Foamed Asphalt
This report describes a study of foamed asphalt aggregate mixtures used in base stabilization. Foamed asphalt stabilized base is a mixture of wet unheated mineral aggregates and asphalt cement mixed while the asphalt cement is in a foamed state. The Asphalt cement is brought to a foamed state by addition of small amounts (1.0 to 2.0 percent) of cold water piped into the hot asphalt cement line. The cold water is converted to steam by contact with the hot asphalt cement, thereby foaming the mixture. The foam is developed in a foaming chamber and sprayed through special nozzles into a pugmill type mixing chamber where it is mixed with unheated, damp aggregates. This mixture is then placed on the roadway with conventional construction equipment. At this point the material looks like and has the characteristics of wet untreated aggregate. After curing, the material appears more like an asphalt treated base. A range of strength coefficients for foamed asphalt treated base of 0.12 to 0.34 has been established by this limited study. Test results indicate that foamed asphalt mixes do offer a viable alternative in the construction of treated bases.
Base Stabilization with Foamed Asphalt
This report describes a study of foamed asphalt aggregate mixtures used in base stabilization. Foamed asphalt stabilized base is a mixture of wet unheated mineral aggregates and asphalt cement mixed while the asphalt cement is in a foamed state. The Asphalt cement is brought to a foamed state by addition of small amounts (1.0 to 2.0 percent) of cold water piped into the hot asphalt cement line. The cold water is converted to steam by contact with the hot asphalt cement, thereby foaming the mixture. The foam is developed in a foaming chamber and sprayed through special nozzles into a pugmill type mixing chamber where it is mixed with unheated, damp aggregates. This mixture is then placed on the roadway with conventional construction equipment. At this point the material looks like and has the characteristics of wet untreated aggregate. After curing, the material appears more like an asphalt treated base. A range of strength coefficients for foamed asphalt treated base of 0.12 to 0.34 has been established by this limited study. Test results indicate that foamed asphalt mixes do offer a viable alternative in the construction of treated bases.
Base Stabilization with Foamed Asphalt
F. Abel (author) / C. R. Hines (author)
1979
62 pages
Report
No indication
English
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