American Association of State Highway and Transportation

Bitumen Insoluble in Paraffin Maphtha (AASHPO T46). This test designated by the American Association of State Highway and Transportation Officials (AASHTO) is used to indicate the content of naphtha-insoluble asphaltenes in an asphalt. Other solvents such as / -heptane (ASTM D3279), / -hexane, and / -pentane have been substituted for the naphtha solvent. 

AASHTO = American Association of State Highway and Transportation Officials. AWWA = American Water Works Association. ... 

Portland cements are manufactured to comply with specifications estabUshed in each country (70). In the United States, several different specifications are used, including those of the American Society for Testing and Materials and American Association of State Highway and Transportation Officials (AASHTO). The ASTM aimuaHy pubhshes test methods and standards (24), which are estabhshed on a consensus basis by its members which include consumers and producers. 

Roughness of the pavement surfaoe can be expressed in terms of the variance of the slope measurements of deformation taken along the longitudinal profile of the roadway in accordance with the American Association of State Highway and Transportation Officials (AASHTO) definition. In the VESYS IIM program, the variance of rut depth is computed in the rut depth model and is passed automatically to the roughness model. The difference in rut depth is assumed to occur because of material variability of each layer. The roughness output is in the... 

AASHTO (1994) Standard practice for short and long term aging of hot mix asphalt (HMA). Provisional specifications for transportation materials and methods of sampling and testing (AASHTO PP2). American Association of State Highway and Transportation Officials, Washington, DC, p 117... 

With constant updates in the American Association of State Highway and Transportation Officials (AASHTO) and American Society for Testing and Materials (ASTM) specifications for epoxy-coated rebar, this corrosion protection system will continue to improve. The specifications involve all aspects of fabrication of epoxy-coated rebar. All these will result in improved performance of epoxy-coated rebar and more durable new concrete stmctures. 

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