Soil Shear Testing Articles

  • Reactor for pigment production - case study

    Large shearing forces are required for the production of certain pigments in order to achieve high colour intensity. For this reason, such pigments are normally produced with the help of kneading /disc dryers, which inevitably provide shearing forces due to their inherent design. The material and the time and energy required for their design makes these devices extremely expensive, especially ...


    By AVA GmbH u. Co. KG

  • Influence of shear on nitrification rates in a membrane bioreactor

    Grundfos BioBooster (GBB) installed and operated a membrane bioreactor (MBR) test plant in 2012. During the period it became evident that the nitrification rate was lower than expected and a study was carried out to investigate the possible reasons for the observed low-nitrification rate. Tests were conducted at a pilot plant and the effect of shear from the BioBooster membrane system and the ...


    By IWA Publishing

  • Anchorage systems for FRP strengthening of infill masonry structures

    An experimental research program consisting of 12 infill wall specimens was undertaken to investigate the effectiveness of several new and existing anchorage systems for fibre–reinforced polymer (FRP) strengthening of infill masonry walls. Specimens were loaded out–of–plane using an airbag to apply uniformly distributed pressure to the masonry. Test results indicate that the anchorage system had ...


    By Inderscience Publishers

  • Predicting apparent shear stress in prismatic compound open channels using artificial neural networks

    The apparent shear stress acting on the vertical interface between main channel and floodplain (with and without vegetation) in prismatic compound open channels was studied using artificial neural networks (ANNs). Apparent shear stress is commonly used to quantify the transverse momentum exchange between sub-areas of the cross section, and its influencing factors include channel geometry, ...


    By IWA Publishing

  • Performance of NSM–FRP RC beams in flexure and shear using locally developed CFRP rebars

    In the present study, an experimental investigation was carried out to evaluate the flexural and shear capacity of near surface mounted (NSM) reinforced concrete (RC) beams using carbon fibre reinforced polymer (CFRP) rebars. A total of 16 half scale beams were tested to study the flexural and shear responses of strengthened RC beams. The CFRP rebars were manufactured at structural testing centre ...


    By Inderscience Publishers

  • Joint shear strength of exterior beam–column joints reinforced with non–metallic reinforcements

    This experimental study primarily focuses on the joint shear strength of full scale size exterior concrete beam–column joint reinforced internally with glass fibre reinforced polymer (GFRP) reinforcements under monotonically increasing load on beams keeping constant load on columns. Four series of joints and total of 14 numbers of such specimens are cast and tested for different parametric ...


    By Inderscience Publishers

  • Performance of NSM-FRP RC beams in flexure and shear using locally developed CFRP rebars

    In the present study, an experimental investigation was carried out to evaluate the flexural and shear capacity of near surface mounted (NSM) reinforced concrete (RC) beams using carbon fibre reinforced polymer (CFRP) rebars. A total of 16 half scale beams were tested to study the flexural and shear responses of strengthened RC beams. The CFRP rebars were manufactured at structural testing centre ...


    By Inderscience Publishers

  • Investigations on damping characteristics of a honge oil-based magnetorheological fluid damper

    Magnetorheological (MR) fluid damper is a kind of intelligent control device that can be used to reduce response of a vibrating member instantaneously with very few moving parts, which is essential in most of the mechanical systems, but challenging. In the present work, a prototype of smart damper using MR fluid (MR damper) is designed based on Bingham plastic model and fabricated to conduct ...


    By Inderscience Publishers

  • Combined particle swarm optimization and fuzzy inference system model for estimation of current-induced scour beneath marine pipelines

    In this paper the capability of Particle Swarm Optimization (PSO) is employed to deal with an Adaptive Network based Fuzzy Inference System (ANFIS) model's inherent shortcomings to extract optimum fuzzy if–then rules in noisy areas arising from the application of nondimensional variables to estimate scour depth. In the model, a PSO algorithm is employed to optimize the clustering parameters ...


    By IWA Publishing

  • ANFIS-based approach for the estimation of transverse mixing coefficient

    Understanding of the fate of pollutants, disposed of in streams, is a matter of concern in recent years for the effective control of pollution. Transverse mixing of the pollutants in open channels is arguably more important than the longitudinal mixing and near-field mixing. Several attempts have been made to establish the relationship between the transverse mixing coefficient and bulk channel ...


    By IWA Publishing

  • High performance vegetated solutions-research synopsis - Case Study

    Research objective Measure performance of the Geoweb® (GW) material combined with a turf reinforcement mat (TRM) (integrated system) with topsoil infill and vegetation under varying shear stresses and flow rates to quantify both hydraulic forces and corresponding soil loss. The test consisted of a series of continuous one-hour flows over the GW-TRM system at incrementally ...


    By Presto Geosystems

  • Micromechanisms of dynamic fracture in biopolyester

    A biopolymer is a naturally occurring polymeric substance formed from individual molecules in a biological system. Biopolymers can also be synthetic by manipulation of the individual molecules once obtained outside the biological system. In the present investigation, attempts are made to investigate the basic mechanisms of dynamic fracture in a polyester biopolymer. Izod impact tests of polyester ...


    By Inderscience Publishers

  • Imaging and analysis of chip formation during orthogonal cutting of titanium alloy

    Orthogonal cutting of titanium alloy Ti-6Al-4V was investigated in a series of continuous and interrupted turning tests. Direct observation of the chip formation zone was achieved using a high speed imaging system with a long-distance microscope lens. Frame rates from 20,000 to 50,000 frames per second were used to record the chip formation cycle over a range cutting speeds from 4 to 150 m/min ...


    By Inderscience Publishers

  • Imaging and analysis of chip formation during orthogonal cutting of titanium alloy Ti-6Al-4V

    Orthogonal cutting of titanium alloy Ti-6Al-4V was investigated in a series of continuous and interrupted turning tests. Direct observation of the chip formation zone was achieved using a high speed imaging system with a long-distance microscope lens. Frame rates from 20,000 to 50,000 frames per second were used to record the chip formation cycle over a range cutting speeds from 4 to 150 m/min ...


    By Inderscience Publishers

  • Model Testing Optimizes and Verifies Design of a 200-MGD Trench Wet Well for the Sugar Creek WWTP

    Charlotte-Mecklenburg Utilities (CMUD) and CDM are currently involved in the design of several treatment plant upgrades at the Sugar Creek wastewater treatment plant (WWTP) in Charlotte, North Carolina. Implementation of this project, which includes a 200-million-gallonper- day (mgd) screenings and influent pump station with dual self-cleaning trench-type wet wells, will provide CMUD with the ...

  • Measurement of Shear Waves in Laboratory Specimens by Means of Piezoelectric Transducers

    The use of piezoelectric ceramics to measure shear wave velocity in laboratory soil specimens is discussed. The experimental technique and interpretative methodology are described. Both bender and flat-plate ceramic elements were employed, and each performed well. Interpretation of the shear waveforms generated with each transducer improved as the number of wavelengths between the source and ...


    By ASTM International

  • A Study of Strike-Slip Faulting Using Small-Scale Models

    Results from tests on small-scale soft clay models subjected to strike-slip faulting in a 1-g environment are presented. Kinematic/boundary conditions and material ductility were dominant factors on model response. Material ductility significantly affected the deformation and breakage patterns in level ground and embankment models, with larger base offsets being required to produce surface ...


    By ASTM International

  • Constant Volume Ring Shear Apparatus

    The paper describes a constant volume ring shear apparatus that allows the measurement of the undrained peak and residual shear strengths of cohesive soils. The undrained peak and residual strengths are applicable to seismic stability evaluations of slopes comprised of or founded on cohesive soil. The constant-volume ring shear apparatus is equipped with a mechanism to adjust the normal stress ...


    By ASTM International

  • A New Fall Cone Device for Measuring the Undrained Strength of Very Weak Cohesive Soils

    A new fall cone device capable of measuring undrained shear strength of extremely soft cohesive soils is described and evaluated. The Automated MIT Fall Cone has a unique mechanical counterweight system that enables the use of effective cone weights as low as 0.005 N. This weight is an order of magnitude lower than possible with a standard fall cone apparatus. The new device also uses a data ...


    By ASTM International

  • Use of Stereophotogrammetry to Analyze the Development of Shear Bands in Sand

    Experimental results are presented from plane-strain compression of a fine-grained, water-saturated loose sand. Together with local measurements of boundary stresses and deformations, systematic analysis of photographs of the deforming specimen allowed for measuring deformations and computing strain fields inside and outside the shear band. The principles, details, and accuracy of the procedure ...


    By ASTM International

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