AASHTO T292-91 基层材料的回弹模量试验.pdf

Standard Method of Test for Resilient Modulus of Subgrddb Soils ana UntibhietfBaiUsubbhsd Materials AASHTO DESIGNATION T 292-91 t. scoPE T 180 Moisture-Density Re- 5. DEFINITIONS lations of Soils Using 1.1 This method covers procedures a 4.54-kg (10-lb) 5.1 Description of Symbols: for preparing and testing untreated sub- Rammer and z 457- 5.1.1 Sr is the total axial stress (ma- grade soils and untreated base/subbase mm (18-in.) DroP jor principal stress). materials for determination of resilient T 190 Resistance R-VaIue 5.1.2 Sr (minor principal stress) and modulus (M,) under conditions repre- and Expansion Pres- 52 (intermediate principal stress) are as- senting a simulation of the physical con- sure of Compacted sumed equal and are the total radial ditions and stress states of materials be- Soils stress; that is, the applied confining pres- neath flexible pavements subjected to T 234 Unconsolidated, Un- sure in the triaxial chamber. moving wheel loads. drained Compressive NOTE 2--For tests which involve mea- 1.2 The methods described are appli- Strength of Cohesive surement of pore pressures of saturat