·Carbonate or Calcareous aggregates are generally white to tan in color sometimes porous essentially amorphous and are softer than siliceous aggregates Siliceous aggregates may be any color or mottled such as granite are hard and non porous They can show distinct cleavage Carbonate aggregates are generally from sedimentary rock formations
·The investigations presented in this paper include 1 experimental study on shear modulus G and damping ratio D of Bushehr siliceous carbonate sand under various stress density states 2
·Carbonate sands comprise typical foundation soils for offshore engineering structures such as oil platforms found in natural deposits These sands have a high shear strength but also very high compressibility which characteristics are due to the shape and the low tensile strength of the grains For the seismic design of offshore structures two key properties
·This paper presents the results from a systematic investigation into the effects of stress level penetrometer diameter penetration depth and relative density on the end resistance qc measured in centrifuge scale cone penetration tests CPTs in a variety of normally consolidated siliceous and carbonate sands Simple empirical formulations are developed that
·Carbonate soils are located in temperate and tropical regions of the earth This kind of soil has special mechanical properties compared with siliceous sand due to special sedimentary environment
·The primary objective of this paper is to investigate the compression behavior of silty sands of carbonate sediments which are typical carbonate soils but still rarely studied in the literature Nevertheless quite a few studies on the clean carbonate sands can still be found in the past few decades in terms of the mechanical and particle
·Keywords Carbonate sand · Compressibility · Crushability · Oedometer · Siliceous sand Introduction Crushing in sand particles has been a topic of interest from both a geotechnical and geological standpoint Crushing of sand particles changes the sand s grain size distribu tion which is in turn reected in the matrix pore size dis
·For ease of comparison the dynamic shear modulus ratio reference range bands of the silica sand obtained by Seed and Idriss et al [41] and Rollins et al [42] the siliceous carbonate sand
·The remolded specimens of the calcareous and siliceous sands for both cyclic triaxial and resonant column tests were prepared using the air pluviation method as employed by Jafarian et al 2012 and Javdanian 2017b in five layers to resemble the under compaction technique recommended by Ladd In fact the layers were placed in a way that the lower
·The investigations presented in this paper include 1 experimental study on shear modulus G and damping ratio D of Bushehr siliceous carbonate sand under various stress density states 2
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