This study investigated the use of phosphogypsum (PG) in long term as a construction material, especially pavement structures. aimed to investigate effect increasing PG percentages on geotechnical parameters Expansive Soil. Extensive laboratory tests were conducted both natural and PG-stabilized soil mixtures examine their compaction properties, consistency limitations, swelling linear shrinkage, pH values, unconfined compressive strength (UCS), California bearing ratio (CBR), scanning...

The resilient modulus of the materials used in various pavement layers has been extensively as an important material property structural design pavement. state stress and moisture content cohesive soils have observed to exert significant effects on measured modulus. Since subgrade underneath undergoes seasonal changes due infiltration precipitations since characterization dependent is a demanding tedious task, there practical need for predictive equation function states content. This paper...

The purpose of this study is to investigate the use glass fibers as discrete random reinforcement in expansive subgrade soil improve its strength for pavement application. fiber content varied between 0.25 % and 1.0 by weight dry soil. A series free swell, Unconfined Compressive Strength (UCS), Indirect Tensile (ITS), California Bearing Ratio (CBR) tests were conducted on unreinforced reinforced specimens. In addition, effect inclusion design performance flexible was evaluated using...

Abstract. The low strength and weak resistance to freezing-thawing cycles of expansive soil present a substantial engineering challenge. However, different stabilizers can improve properties under such conditions. This study determines how affect the behavior fine-grained soils stabilized with lime, cement, Zeolitic Tuff (ZT). Seventeen combinations these three materials were employed compared natural soil. Soils tested for unconfined compressive after performing several ranging from 0 20...

Basalt was used as an ornamental stone in any historic and ancient cities Jordan. Measuring the uniaxial compressive strength (UCS) tangent Young’s modulus (Et) laboratory requires premium quality specimens with special core dimensions. This research focuses on correlations both UCS Et Leeb Rebound Hardness Test (LRH). In laboratory, UCS, Et, LRH were performed 90 samples extracted from 30 different rock boulders collected neighboring area of Umm al-Jimal, a city northeastern A strong power...

Abstract Biochar is increasingly recognized for its ability to enhance hydro-physical properties of soil, offering promising solutions improving soil structure, water retention, and overall agricultural productivity. In this study, sandy loam was amended at different rates (0, 15, 30, 60 t ha −1 ) biochar produced from olive pomace (Jift) pyrolysis temperatures (300, 400, 500, 600 °C), incubated 60, 90 days. The biochar-amended soils were collected analysis after each incubation period...

The main objective of this study was to evaluate the use glass fibers and cement as stabilizing agents for highly expansive soil. Fibers with two aspect ratios (12 30 mm in length) were added percentages soil’s dry weight (0.5%, 0.75%, 1%, 1.5%), by soil (2% 6%). Sixteen groups treated specimens prepared subjected laboratory tests—unconfined compressive strength (UCS) after curing (0, 7, 14, 28 days), swelling percentage, California bearing ratio (CBR). Interactions at interface between...

Expansive soil is considered an engineering problem that may cause cracks and distresses in structures roads. Due to its swelling potential low unconfined strength, expansive causes failures leads financial losses. Oil Shale Ash "OSA" the byproduct of combustion oil shale rock produce electricity. Instead dumping OSA materials into landfills, which has several negative environmental implications cost burdens, utilizing these as building might alleviate concerns caused by their disposal. This...

Indirect methods for predicting material properties in rock engineering are vital assessing elastic mechanical properties. Accurately holds significant importance and geotechnical engineering, as it strongly influences decisions about the design construction of infrastructure projects. Uniaxial compressive strength (UCS) is one most important understanding how rocks geological formations respond to stress deformation. However, standard UCS test faces several challenges, including its...

The present work aims to evaluate expansive soil stabilization using different additives. Twenty mixtures consisting of 10%, 20%, 25%, and 30% zeolitic tuff (ZT) with 2%, 4%, 6% lime in various combinations were used stabilize the for pavement subbase application. A comprehensive test program, including Atterberg's limits, compaction, unconfined compression strength (UCS), California Bearing Ratio (CBR), resilient modulus, permanent deformation, was performed on natural stabilized specimens....

Steel manufacturing factories usually dump byproduct recycled steel randomly in open areas, creating environmental hazards. Using such materials highway construction could be a solution to the hazards generated from their disposal. A combined method of physical and chemical stabilization was used this study investigate value using mill scale (MS) cementitious improving strength deformation properties subgrade soil. The results showed that MS additives effectively reduced plasticity increased...

In Jordan, three major steel-manufacturing factories dump their by-product, recycled steel, randomly in open areas creating environmental hazards. This study intended to evaluate the effectiveness of using a By-product Recycled mill Scale (BRS) improving geotechnical properties high-plastic subgrade soil. The efficacy BRS was judged by improvement consistency limits, compaction, free swell, Unconfined Compression Strength (UCS), and California bearing ratio (CBR). Results showed that...

A research program was conducted to study the behavior of different drainable base and subbase materials used by Ohio Department Transportation (ODOT). Two construction sites were chosen from this be built with course materials. Site I (ATB-90-19.56) consisted ODOT 306 cement-treated, 308 asphalt-treated, 304 sections. II (ATB-90-0.00) 307-NJ, 307-IA, 307-CE, 304, asphalt-treated Time domain reflectometry (TDR) probes installed in subgrade unbound layers provide continuous monitoring...

The performance of permeable base materials used by the Ohio Department Transportation (ODOT) was evaluated with a calibrated finite element modeling technique. Two bound (asphalt-treated and cement-treated base) four unbound course (typical ODOT 304, 307-IA, 307-NJ, 307-CE) were built on two monitoring sites I-90 in Ashtabula County, Ohio. Moisture content measurements made time domain reflectometry. Movement water through six pavement sections at project site modeled method....

This paper aims to develop a closed-form semi-empirical formula for predicting the buckling load of simply supported and clamped composite panels with circular cutout subjected uniaxial biaxial conditions. The finite element method (FEM) was used validate equation. effective moduli approach lumping layers transform laminated anisotropic panels. proposed developed as function respect panel dimensions material properties. results presented were found compare reasonably well (FE) analysis...

A research program was conducted to study the behavior of different drainable base and subbase materials used by Ohio Department Transportation (ODOT). Two construction sites were chosen from this be built with course materials. Site I (ATB-90–19.56) consisted ODOT 306 cement-treated, 308 asphalt-treated, 304 sections. II (ATB-90-0.00) 307-NJ, 307-IA, 307-CE, 304, asphalt-treated Time domain reflectometry (TDR) probes installed in subgrade unbound layers provide continuous monitoring...

This study aims to investigate the variation of P-wave velocity as a function water saturation. In addition, by using regression analysis, predictability saturated from dry and rock's hardness has been examined. order perform this study, one hundred cylindrical rock core samples, fifty samples each obtained Ruweished in northeastern Jordan Ajloun northwestern Jordan, have extracted prepared with height 20 cm diameter 10 cm. measured five times sample states average value taken. The results...