The aim of this study was to develop and evaluate statistical models for predicting the uniaxial compressive strength (UCS)
and average Young’s modulus (Eav) for caliches, using some index and physical properties. The caliche samples, from Adana, southern Turkey, were of low strength
and difficult to sample. X-ray diffraction and microscopy were undertaken and the following physical parameters established:
unit weight, apparent porosity, Schmidt rebound number, Shore hardness, P-wave velocity, slake durability, point load, uniaxial
compressive strength and average Young’s modulus. Simple and linear regression variable selection analyses were performed.
The best relationships were obtained for UCS with P-wave velocity and unit weight and for average Young’s modulus with P-wave
velocity, porosity and slake durability. Empirical equations are proposed, although it is emphasised that these may only be
applicable for caliche of a similar geological character.
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Abstract Based on the continuum theory, a physical model of gas-solid two phase flow in a centrifugal fluidized bed has been proposed. A set of governing equations to describe the fluidization state are obtained and solved numerically after some simplifying. The quantitative experimental study on the characteristics of the incipient fluidization in the centrifugal fluidized bed is performed to examine the proposed model. Gas-solid two phase heat transfer in CFB during a drying process is also conducted. The influences of bed thickness, particle diameter, physical properties of particle, rotating speed of the bed and the gas superficial velocity on heat transfer characteristics are examined. A correlation that can be used to calculate the heat transfer coefficients in the drying process in CFB is obtained. 相似文献
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