A series of phosphate glass with the following formulation was manufactured using melt quenching procedure: 3As2O3 – 37PbO (60 − 𝑥𝑥) P2O5- 𝑥𝑥 WO3, = (0 ≤ 5 mol. %). The glasses' physical and other structural characteristics were examined in depth. basic properties materials a variety characterization procedures, such as XRD FT-IR. With increasing WO3 concentration, network evolves, leading to depolymerization network, according FT-IR analysis. physical, mechanical, parameters enhanced like...

In this paper, an approach for reliability-based design optimization of reinforced concrete cantilever retaining wall is described. A parametric study conducted to assess the effect uncertainties in parameters on probability failure walls. total, ten modes are considered, viz. overturning about its toe, sliding base, eccentricity, bearing capacity below base slab, and shear moment toe heel stem. The analysis performed by treating backfill foundation soil properties, geometric properties...

The use of synthetic fibres as reinforcement to stabilise expansive soils is gaining momentum. As a contribution towards this growing field research two different types fibres, Fiber Mesh® and Cast®, were evaluated stabilisation alternative for in the presence lime. California bearing ratio (CBR) chosen performance indicator it good pointer pavement effectiveness. Variables such length amount well curing period studied. Both deterministic probabilistic (or reliability) analyses presented...

In this paper, an analytical study considering the effect of uncertainties in seismic analysis geosynthetic-reinforced soil (GRS) walls is presented. Using limit equilibrium method and assuming sliding wedge failure mechanism, conducted to evaluate external stability GRS when subjected earthquake loads. Target reliability based approach used estimate probability three modes failure, viz., sliding, bearing, eccentricity failure. The properties reinforced backfill, retained foundation soil,...

In this paper, an approach for target component and system reliability-based design optimisation (RBDO) to evaluate safety the internal seismic stability of geosynthetic-reinforced soil (GRS) structures is presented. Three modes failure are considered: tension bottom-most layer reinforcement, pullout topmost total all reinforcement layers. The analysis performed by treating backfill properties, geometric strength properties as random variables. optimum number layers length needed maintain...

This paper evaluates the effectiveness of stabilizing expansive soil with two different types fibers, fiber mesh (FM) and cast (FC), in conjunction chemical stabilization. The intention this study is to evaluate effect these fibers lime by improving its unconfined compressive strength (UCS) behavior. varying lengths (6 12 mm) amounts (0.2, 0.4, 0.6% dosage weight soil) FC FM curing periods (0, 7, 28, 60, 120, 180, 360 days) on UCS secant modulus a semiarid soil, presence lime, was...

Among coal mining-related wastes, gangue (CG) is the heterogeneous waste generated during mineral processing or washing phase of mining. A thorough understanding environmental concerns associated with current model CG utilization and potential future application gaining paramount importance. Though previous review articles on have presented CG, an appraisal factors affecting its mechanical properties feasibility as a geotechnical material has not been taken into consideration. An attempt...

This paper presents the use of pseudodynamic method to compute rotational displacements gravity retaining walls under passive condition when subjected seismic loads. The concept Newmark sliding block for computing and limit equilibrium analysis have been combined in this evaluate performance a conditions. One main features is adoption new procedure earth pressure considering composite curved rupture surface (which combination arc logarithmic spiral straight line) dynamic nature earthquake...

In this article, synthetic fibres in the presence of lime stabilisation are proposed as an alternative to overcome issues related shrink-swell distress expansive soils. Two types fibres, Fiber Cast® (FC) and Mesh® (FM), were studied by conducting one-dimensional fixed ring Oedometer swell-consolidation bar linear shrinkage tests. Three dosages (0.2, 0.4 0.6% weight soil) two lengths (6 12 mm) evaluated with without treatments. The results indicated that FC had better swell restricting...

This paper presents our findings on the effect of adding biopolymers to locally available soil form low-cost alternative landfill liner materials. Hydraulic conductivity is key parameter for assessing suitability any geomaterial as a liner. In view this, hydraulic biopolymer-modified was determined at various dosages. Two biopolymers—xanthan gum and guar gum—were used in experimental work dosages 0.5%, 1%, 2%, 4% by weight dry mass. The results indicated that values decreased with an...

In this study, the stability of anchored cantilever sheet pile wall in sandy soils is investigated using reliability analysis. Targeted formulated as an optimization problem framework inverse first order method. A sensitivity analysis conducted to investigate effect parameters influencing wall. Backfill soil properties, – steel interface friction angle, depth water table from top wall, total embedment below dredge line, yield strength steel, section modulus pile, and anchor pull are all...

The paper presents a method for the evaluation of external stability reinforced soil walls subjected to earthquakes in framework pseudo-dynamic method. seismic reliability wall is evaluated by considering different possible failure modes such as sliding along base, overturning about toe point wall, bearing capacity and eccentricity resultant force. analysis performed properties backfill, foundation below base length geosynthetic reinforcement characteristics earthquake ground motions shear...

ABSTRACT: The study focuses on probabilistic assessment of the internal seismic stability reinforced soil structures (RSS) subjected to earthquake loading in framework pseudo-dynamic method. In literature, pseudo-static approach has been used compute reliability indices against tension and pullout failure modes, real dynamic nature accelerations cannot be considered. work presented this paper makes use horizontal vertical sinusoidal accelerations, amplification vibrations, shear wave primary...

An experimental investigation was carried out to evaluate the influence of fines content on hysteretic behavior water-retention characteristic curves (WRCCs) reconstituted soil subjected wetting and drying cycles. The red were collected from Indian Institute Technology Hyderabad, Kandi, Sangareddy. Standard Grade-II sand (i.e., Ennore sand) including varying percentages (30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%) by dry weight produce different mixes. filter paper method adopted measure effect...

Expansive soils which create heave and shrinkage related distresses are considered to be extremely problematic globally. When these used alone or in conjunction with fiber-reinforcement as hydraulic barriers waste containment systems, their prime purpose is impede flow. Polypropylene fiber materials durable sustain improvement soil properties the long run. In order have intact bonding between randomly mixed clay, an additive form of lime considered. this study, combined effect oriented...

This study evaluates the unconfined compressive strength (UCS) behavior of biopolymer-modified cohesive soil exposed to natural field conditions. Two biopolymers, xanthan gum (G1) and guar (G2), at dosages 0.5, 1, 2, 4%, are considered for study. The performance biopolymers under curing simulates conditions better. To assess stability soil, UCS specimens were subjected daily variations in temperature relative humidity, periods 7, 14, 28, 45, 60 days. test results indicate that dehydration...

This paper discusses the second-order reliability-based design optimization (SORBDO) of unsaturated finite slopes. An efficient search algorithm is proposed to locate most probable slip surfaces using Morgenstern–Price method slices. The variability fitting parameters soil water characteristic curve (SWCC) and shear strength have been taken into account for evaluating reliability Six (USS) models are considered analysis soils. conservative model optimum slopes recommended. Moreover, results...