Quantitative Analysis to Verify the Theory of Soil Particle Agglomeration and Its Influence on Strength and Deformation Resistance of Geomaterials

摘要

Soil particle agglomeration is one of the most important characteristics required in geomaterials for their application in the construction of geo-structures. Fundamentally, when soil particles are subjected to secondary (creep) or long-term consolidation within confined boundary conditions, they undergo mechanical changes of their intrinsic properties as a result of ageing. In the ease of clays this may alter their minerals as in weathering, changes in concentration of ions in pore water, and/or replacement with ions of different valance, precipitation, cementation, mineral leaching, internal erosion and time related secondary consolidation associated with creep (Ea/Et=0) and thixotropy basically defined as a gain in strength at constant water content. In the soil mechanics perspective of agglomeration mechanisms and matrix of soil particles, it is considered that the effects of these processes will have limiting boundary values with time tending to a residual state as the material densification is enhanced. On the other hand, Lime and/or cement stabilization of soils is principally based on ion exchange capacity, pozzolanic reaction, carbonation and suction/swelling effects through heat of" hydration. Nevertheless, hardly any research has been comprehensively carried out regarding the quantitative analysis of such agglomeration mechanisms. By applying data from innovative experimental testing and research, this Study undertakes quantitative analysis to verily the theory of soil particle agglomeration by comparing the strength and deformation resistance characteristics for geomaterials with cementing agents of" varying intrinsic properties, particle size, texture, shape, and enhanced mechanical stabilization based on optimum batching and/or through soil particle interaction with reinforcing systems such as geogrids.