Research on Static and Dynamic Characteristics of Aeolian Sand in Keerqin Desert Area

Abstract

Quality subgrade filler is scare in the construction of highway in the desert area, aeolian sand is selected as subgrade filler. The basic physical properties and influence law of static mechanical index of resilient modulus, CBR of aeolian sand affected by moisture content ratio, dry density, compactness are analyzed studied, Empirical formulas are derived between CBR, resilient modulus and water content ratio, compactness by mathematical statistical methods; The variation regularities of dynamic compaction characteristics are researched which are influenced by test methods, vibration time, the way of filling, water content ratio etc. simultaneously. The results can provide guidance for construction and control of highway in this region.

Polypeptide additives for improving the performance of microbially induced calcite precipitation (MICP) sand consolidation

“…Despite the potential of using aeolian sands as a cost-effective building material, their low shear strength and lack of viscosity make them unsuitable for direct use in building materials [20][21][22]. While Microbially Induced Calcite Precipitation (MICP) holds the potential to transform these loose sands into viable building materials [4,23], the method has its shortcomings. In particular, the uneven distribution of precipitated calcite and insufficient mechanical strength in the consolidated sand pose significant challenges.…”