Nafeth Abdel Hadi

• Professor
• Instructor at Faculty of Engineering Technology

The western part of Amman, the capital of Jordan, holds a layer of 4 to 5 meters depth of problematic brown clay that exhibits a wide range of plasticity, swelling, settlements and low shear resistance. On the other hand, south Jordan holds large deposits of bituminous oil shale that extend to considerable depths. The government of Jordan has decid...

The western part of Amman, the capital of Jordan, holds a layer of 4 to 5 meters depth of problematic brown clay that exhibits a wide range of plasticity, swelling, settlements and low shear resistance. On the other hand, south Jordan holds large deposits of bituminous oil shale that extend to considerable depths. The government of Jordan has decid...

Jordan has huge organic-rich oil shale resources. The exploitation of this resource for generating electrical power by direct combustion is eminent. This process will produce huge ash tailings that will contain high concentrations of potentially leachable toxic elements (e.g. Cr+6, V+5, As+3 , Cd+2 etc,). This ash is friable, and eventually will in...

Jordan has huge organic-rich oil shale resources. The exploitation of this resource for generating electrical power by direct combustion is eminent. This process will produce huge ash tailings that contain high concentrations of potentially leachable toxic elements (e.g. Cr +6 , V +5 , As +3 , Cd +2). This ash is friable and eventually will interac...

Phosphoric acid production generates unavoidable calcium sulfate by product (i.e. phosphogypsum (PG)) that is usually disposed either within a nearby located gypsum stacking system. However nowadays this type of industry has been faced with two main problems; these are the formation of huge stockpiles of phosphogypsum that affects the environment d...

This research aims to improve the physical and mechanical properties of sprawling brown clay, which represents a serious difficulty for construction in Jordan, in particular in the middle and northern regions. Experimental work was conducted using different materials such as polymer fibers, crushed limestone sand, and Type 1 OPC cement mixed with c...

The following work aims at investigating the utilization of meta-kaolin and calcined brown smectite rich clays as inhibitors of alkali silica reaction (ASR) and improving the compressive strength in Type 1 ordinary Portland cement mortars including sand size chert or silicified limestone. Mortars were cured and tested at 56 days age. The compressiv...

p> This research work aims to investigate the possibility to produce Ordinary Portland Cement free construction materials depending on the reactivity of high alkali liquids or solids with rich silica-alumina clay through geo polymerization process. Different mixtures of kaolin, metakaolin, bituminous limestone ash and NaOH were prepared and molded...

Jordanian granitic rocks (JG) are highly distributed and available in huge quantities in south Jor-dan, Aqaba area. Granite in south Jordan (JG) is belonging to Aqaba granite complex. This study has been carried out to investigate geological and engineering properties of JG from Aqaba vicinity, south Jordan, in addition to identify and classify the...

Several materials such as tuff and Tripoli which is naturally occurring and industrial by-products wastes as high calcium ash and slag were investigated as cement substitutes in this paper. Compressive strength of various standard mortar samples have been tested at 7 and 28 days. The obtained results show that these materials have improved the prop...

Many heavy and toxic metals are found in variable concentrations contained in the High Calcium Ash (HCA) produced by direct combustion of the bituminous limestone. Huge quantities of ash will be produced when bituminous limestone is utilized as energy source for electricity production or retorting process to produce crude oil in Jordan. One of the...

Different percentages of polymers have been added to concrete, to evaluate its impact resistance. Mixes have been made for plain concrete with crushed stone, also plain concrete mixes with round gravel, Concrete mixes with (0.2, 0.85, 1.5 and 2.0) % of Melment to 100 Kg of binder, Concrete mixes with (0.2, 0.5, 0.75 and 1.5) liter of Glenium to 100...

Different percentages of polymers have been added to concrete, to evaluate its impact resistance. Mixes have been made for plain concrete with crushed stone, also plain concrete mixes with round gravel, Concrete mixes with (0.2, 0.85, 1.5 and 2.0) % of Melment to 100 Kg of binder, Concrete mixes with (0.2, 0.5, 0.75 and 1.5) liter of Glenium to 100...

Huge amounts of phosphogypsum (PG) are produced as by-products of phosphoric acid manufacture process in Jordan. Millions of tones of PG wastes are stockpiled over open areas. Major negative environmental impacts are highly expected due to dissolution of various hazardous chemicals the stockpiled contains. This will cause a serious threat to the so...

Huge quantities of variable size fragments of phosphatic gangue are stockpiled over wide areas in the vicinity of Rusaifa area. These detrital sediments are classified as a mixture of sand, pebbles, cobbles and boulders. This research aims to utilize theses waste deposits for the production of base, sub base course for flexible and or to improve cl...

Al-Ekeder landfill leachate constitutes represent a serious threat to the local aquifers. Al-Ekeder Disposal Site (ADS) is the only official dumpsite for northern Jordan, serving 62 towns and villages, and considered as the second largest landfill in Jordan. The major concern at ADS is the potential contamination of groundwater extracted by private...

Currently, demand on power is increasing due to rapid industrial growth all over the world. That means more fly ash will be produced as a result of coal combustion for the purpose of power generation. In the meantime, due to public resistance of nuclear power plants, the amount of coal ash is expected to exceed millions of tons. Therefore, this art...

Al-Shawbak castle mortars and plasters were characterized through physical, mechanical and chemical analysis. The studied masonry and plaster mortars have shown intensive weathering and erosion features, low compressive strength, and high absorption and disintegration behavior when soaked in water. Limy ash has been prepared from the El-Lajjun bitu...

With development of infrastructure and increasing transportation demands, construction of better pavements with longer lives is required. Low quality of unsaturated compacted borrowed material that used in sub-base and base course can be mixed with high calcium ash to produce cement treated base and roller compacted concrete (RCC) without ordinary...

The following work aims at minimizing the environmental impact of the solid wastes (ash) that is produced after the utilization of the bituminous limestone in thermal power stations and/or retorting processes. The laboratory tests have been selected with respect to construction needs and possible post construction conditions. Utilization of the var...

A significant amount of phosphatic waste and phosphatic overburden soils are stockpiled in the Al-Rusaifa area of Jordan. Research was completed on stabilizing this waste by mixing it with limy ash that was produced by the direct combustion of bituminous limestone. Doing so minimizes the environmental impact of the huge amount of phosphatic waste,...

The following work aims at minimizing the environmental impact of the solid wastes (ash) that is produced after the utilization of the bituminous limestone in thermal power stations and /or retort processes. Limy ash has been prepared from the El-Lajjun bituminous limestone by direct combustion at 1,200, 950, and 525°C respectively. The laboratory...