Mineralogy in Geotechnical Engineering

The several investigations on soils by different researchers have been executed, but research on soil mechanical propertiesbased on mineralogy is very meager, in this regard the author intention is employee of natural minerals for evaluation of soilcohesion, it may leads to developments of a soil with appropriates characteristics in permeability, transmitting load, resistingagainst deformation and settlement. This paper deals with analysis of soil cohesion based on mineralogy. The result revealedcohesion of a plastic soil could be improve by mineral presented in an non plastic soil, and also carbonate has negative affecton soil cohesion and some other soil minerals also have same affect on cohesion that required to be more investigate

Evaluation of seismic mitigation of embankment model

Conducting experiment on embankment model by shaking table could be an accurate method to evaluate the behavior of embankment or any structures under seismic loading. In this research work, in order to assess the function of seismic force and accurate placement of dense zone in the embankment model, the results of three experiments have been considered. To evaluate the reaction of the embankment model, it was measured the stress in the system and photographs were taken. The results of three experiments indicated that suitable arrangement of dense zone is the main factor at the play in embankment stability, and in predicting the possibility of embankment behavior

Forecasting bearing capacity of the mixed soil using artificial neural networking

Abstract. The bearing capacity of soil changes owing to the mechanical properties of the soil and influences on structural stability. In most of the geotechnical engineering projects, there are several soil mechanic experiments, they need interpretation before application. The mechanical properties of soil interaction make complex predict of soil bearing capacity. However, to enhancement safety of construction project need to the interpretation of soil experiments and design results for proper application in a geotechnical engineering project. In this study, artificial neural networking is proposed for the evaluation of the mixed soil characteristics to forecast the safe bearing capacity of soil because of the mechanical properties of the soil interaction phenomenon. The results reveal for prediction of the safe bearing capacity, the R2 and RMSE for all mechanical properties effects on safe bearing capacity are 0.98 and 0.02, these values can provide a suitable accuracy for prediction safe bearing capacity of the mixed soil. The higher inaccuracy obtained when only the influence of single mechanical property on the mixed soil considered in prediction of the safe bearing capacity. This study supports the enhancement of geotechnical engineering design quality through prediction safe bearing capacity from characterized mechanical properties of the soil

The multilayered soil-structure seismic interaction and structure vibration mechanism

The morphology of subsoil influences to soil-structure interaction and it makes complex to predict seismic structural stability. The structural elements seismic response associate to soil-structure interaction is required expansive investigation with considering soil morphology. The main objective of the present study is to identify influence of near-fault ground motion mechanism reach to the structure element for evaluate strain energy modification due to the morphology of subsoil and developing load and displacement on the structural element with built-up synthetic subsoil for soil-structure seismic interaction design. The results of the numerical simulation revealed that the (i) displacement mechanism and applied seismic load of the structural element, (ii) strain energy modification and (iii) the structural vibration patterns of continuous beam in a timber frame have been changed in associated to the soil foundation characteristics. The innovation of this study is the soil-structure interaction, the soil layers interaction, near-fault ground motion and mechanical properties of the soil at different location of the soil foundation are fundamental parameters to control continuous timber beam seismic design

Natural minerals mixture for enhancing concrete compressive strength

The construction material quality is required to be improved in order to enhancing structure stability, optimizing construction cost and quality. The kaolin and bentonite have been mixed in equal quantity and treated by heat for 1 hour under 600 oC, 800 oC and 1000 oC to create new minerals under high temperature condition to introduce an acceptable concrete additive for achieving concrete compressive strength in early age.To study micro properties of additive-cement mixture, X-ray and FESEM experiments have been used. The results indicate that acceptable proportion of unheated kaolin-bentonite is improving the concrete compressive response. But if kaolin-bentonite mixture treated by heat under 800 oC and in quantity of 12 % has been used in concrete mixed design, then the concrete compressive strength of 7 days shows the best result. The result is due to the development of new minerals under high temperature condition in mineral mixture and also kaolin-bentonite additive change cement past crystal and lead to enhancement of nano structural cement bonding

Evaluation of seismic mitigation of embankment mode

Conducting experiment on embankment model by shaking table could be an accurate method to evaluate the behavior of embankment or any structures under seismic loading. In this research work, in order to assess the function of seismic force and accurate placement of dense zone in the embankment model,  the results of three experiments have been considered. To evaluate the reaction of the embankment model, it was measured the stress in the system and photographs were taken. The results of three experiments indicated that suitable arrangement of dense zone is the main factor at the play in embankment stability, and in predicting the possibility of embankment behavior

Backward Tamm states in left-handed metamaterials

We study the electromagnetic surface waves localized at an interface separating a one-dimensional photonic crystal and left-handed metamaterial, the so-called surface Tamm states. We demonstrate that the metamaterial allows for a flexible control of the dispersion properties of surface states, and can support the Tamm states with a backward energy flow and a vortex-like structure.Comment: 3 pages, 5 figure