Failure modes and mechanisms of pavements in saline foundations

• DOI: 10.1680/jtran.17.00049
• Publication Date: 2018-06-06T13:57:52Z
• Authors: Jun Zhang; Xingzhong Weng; Bo Qu; Junzhong Liu; Bohan Yang; Yifeng Li
• Keywords: Sodium sulfate; Base course

Saline soil causes problems for the construction of airfield pavements and results in some pavement failure modes that are different from or more serious than non-saline soil. Through an investigation several typical airports China, were determined this study as mainly blow-ups, faulting, slab cracking black spots. These failures attributed to subgrade course, cement-stabilising aggregate base course (CSABC) concrete surface subjected levels sulfate chloride attack. Salt-heaving experiments conducted courses, while salt corrosion performed course. The indicate salt-heaving pressure soils not only increases with increase dry density content sodium sulfate, but also varies water reaches a maximum value at optimum moisture. compressive strength CSABC was found first then decrease contents reached threshold 0·3% 0·2%, respectively. In addition, impacts sulfates on flexural strength, dynamic modulus elasticity mass loss be proportional content.