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AASHTO T 256-01 (2020)
M00001748
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AASHTO T 256-01 (2020) Standard Method of Test for Pavement Deflection Measurements
standard by American Association of State and Highway Transportation Officials, 2001
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AASHTO T 256-01 (2020) provides standards for measuring pavement surface deflections, directly under, or at locations radially outward (offset) from a known static, steady-state, or impulse load. Deflections are measured with sensors that monitor the vertical movement of a pavement surface due to the load. This test method describes procedures for the deflection measurement using various deflection testing devices and provides the general information that should be obtained regardless of the type of testing device used.This test method is applicable for deflection measurements performed on flexible asphalt concrete (AC), rigid portland cement concrete (PCC), or composite (AC/PCC) pavements. Rigid pavements may be plain, jointed, jointed reinforced, or continuously reinforced or fractured concrete.