Mohamadali Rowshanzamir

Isfahan University of Technology | IUT · Department of Civil Engineering

BACKGROUND AND OBJECTIVES: Soil frost heaving causes significant destruction to road pavements, railways, pipelines, and other lifeline infrastructures. The conventional methods for dealing with the soil frost heave are primarily based on using the materials whose production and use are harmful to the environment. Due to the recent ecological conce...

The contamination of soil by various oil products is a severe geo-environmental problem. In this study, some geotextiles were used as superabsorbent geotextiles to decontaminate soil polluted with crude oil. The ability of these geotextiles to absorb oil is better than that of absorbing water. The removal efficiency of the absorbent geotextile was...

Nowadays, mass production of tires and construction operations adjacent to saturated soils have become a concern for engineers. The present study aimed to explore the potential of the combined effect of a waterproof polymer and rubber powder, confining pressure and cyclic stress ratio on the static and dynamic properties of the sand-rubber-polymer...

In the current study, a series of laboratory tests were conducted to investigate the interaction between contaminated soils with clay and the effect of them, contaminant residence time, absorbent additives type and content, microwave power, specimen weight, maximum grain size and fine grain fraction on the removal efficiency of pollution through mi...

This research investigates the behavior of strip footing on the geosynthetic-reinforced sandy soil slope and the effect of different parameters contributing to their performance using laboratory model tests. A novel kind of geosynthetics, braid, has been proposed for reinforcement. The soil within the braid is related to the outer soil and also bra...

According to the dramatic increase in construction near loose coastal saturated soils, stabilizing these soils due to saturation conditions has always faced challenges. The main purpose of this investigation is to assess the static and dynamic performance of saturated sand stabilized with polyvinyl acetate powder - as a newly introduced source of p...

In the present era, due to various industrial developments, there is a need to use different applications of nuclear energy. But the leading challenge is the management of nuclear waste, which emits dangerous rays such as gamma rays. This research aim is to create a layer to be used as a protective coating against radiation in low-level waste landf...

In this study, the Taguchi design of experiments (TDOE) is employed to enhance the bearing capacity of geotechnical structures. To this end, two different case studies, including tapered helical piles as a novel kind of deep foundation (Case 1) and a shallow foundation resting on braid-reinforced soil as a new type of soil reinforcing technique for...

Today, new improvement methods to improve the geotechnical properties of soils are considered. Although a lot of improvement techniques are in use around the world, they have their own advantages and disadvantages. Chemical, physical, mechanical, biological and electrical techniques may be named as the common methods of soil improvement. Some of th...

This study introduces the tubular braided structure as a new geosynthetic material for sand reinforcement. The performance of a tubular braid under the influence of similar soil–reinforcement interaction mechanisms has been investigated to emphasize the effect of the reinforcement form on the performance of the reinforced soil composite. For this p...

One of the common features used for improving the bearing capacity of footings adjacent to a soil slope is reinforcement by geosynthetics. These elements may somehow isolate the soil inside of the geosynthetic and eliminate shear-stress mobilization. In this study, a new kind of three-dimensional geosynthetics called expandable braided sleeve (brai...

Different techniques have been proposed to increase the bearing capacity of open-ended piles. Welding helices to the shaft and tapering the pile shaft could be simultaneously used to enhance the static and dynamic behaviors of these piles. This paper subjects the bearing capacity, stiffness, frictional behavior, and material efficiency of the taper...

Due to population growth and land scarcity, especially in big industrial cities, many ground improvement projects are required annually for new developments. Thus looking for more efficient and comprehensive methods in the field of soil improvement seems t o be an essential necessity. Microbial-induced CaCO3 precipitation (MICP) is an innovative te...

Due to population growth and land scarcity, especially in big industrial cities, many ground improvement projects are required annually for new developments. Moreover appropriate ground improvement techniques are also required to encounter dust storms and desert expansion which are common environmental problems in many countries. Thus looking for m...

Human activities can pollute not only air and water but also soil. One of the most important types of soil pollution is the contamination. Such contaminations are known to affect the geotechnical characteristics of soils as well as their physicochemical properties. These effects are required to be considered and remedied to ensure the safety of str...

The available poster on soils contaminated has been mostly focused on Technics for reducing or eliminating the soil pollution. Although after eliminating the soil pollution, the cohesion and internal friction angle are being investigated.

The high exposure of areas in the vicinity of oil plants and refineries to crude oil and oil product contaminations and the problems they cause for the physical expansion of these facilities underscore the importance of stabilization of oil-contaminated soils. Soil stabilization with cost-effective stabilizing agents is widely regarded as a simple...

Because of global environmental problems due to desert expansion and dust storms as well as constructional requirements, looking for more efficient and comprehensive methods to stabilize dune sands and weak grounds seems to be an essential necessity. MICP (Microbial-induced CaCO3 precipitation) is an innovative technique in which bacterial activiti...

Microbial induced calcite precipitation (MICP) is a novel ground improvement method to increase strength and reducing the hydraulic conductivity of sand using natural biogeochemical processes. This paper aims to study the effectiveness of MICP in improving the shear strength and hydraulic conductivity of dune sand. A species of Sprosarcina group, S...

In this study, the effects of some structural parameters and also two kinds of additives on hydraulic performance, self-healing ability and wet/dry durability of GCL are experimentally studied. Structural parameters include bentonite mass per unit area of GCL and needle-punching density. Nano-clay particles and sodium poly-acrylate which is a kind...

The van Genuchten model (1980) is widely used for the description of the Soil-Water Characteristic Curve (SWCC) of a variety of soils. This study uses the Genetic Programming (GP) for the presentation of equations estimating the van Genuchten (vG) model fitting parameters for unsaturated clean sand soils. Moreover, this study uses the data derived...

Due to environmental problems of desert expansion as well as dust storms, looking for more efficient and comprehensive methods to stabilize dune sands seems to be an essential necessity. Microbial-induced CaCO 3 precipitation (MICP) is an innovative technique that harnesses bacterial activities to modify the physical and mechanical properties of so...

Due to environmental problems of desert expansion as well as dust storms, looking for more efficient and comprehensive methods to stabilize dune sands seems to be an essential necessity. Microbial-induced CaCO 3 precipitation (MICP) is an innovative technique that harnesses bacterial activities to modify the physical and mechanical properties of so...

In the current paper, the consolidation settlement of a strip footing over a finite layer of saturated soil has been studied using the finite element method. In Biot's coupled consolidation equations, the soil deformation and excess pore pressure are determined simultaneously in every time step which refers to the hydro-mechanical coupling. By cons...

In this paper, hydraulic performance and self-healing capacity of geotextile clay liners containing various amounts of nano-clay are studied. Nano-clay was employed as a substitute of a portion of bentonite. For comparison, the hydraulic performance and self-healing capacity of common geotextile clay liners (geotextile clay liners without any addit...

This paper aims to investigate the likely effects of geogrid reinforcement configuration on the bearing capacity of footings. Using geogrid reinforcement layers with certain total areas in various uniform and non-uniform arrangements, the bearing capacities of footing models on reinforced sand beds were determined and compared. The first arrangemen...

This laboratory project aims to investigate the influence of polyvinyl acetate (PVA) grout injection on sandy soil improvement. In order to make the polymeric material injectable through the soil particles, adhesive polymer is mixed with water in certain weight percentages. Fine grained sand with different dry densities in its loose, medium and den...

This paper reports some results of an experimental investigation on the strength anisotropy of a compacted clayey soil typical of those used as impermeable cores of earth dams. Large cubic samples of the selected soil were first prepared using various compaction levels. Cylindrical specimens were then taken from the block samples both along and per...