Alyaa Al-Attar

Northern Technical University

The current article examined the effect of adding nano silica and polystyrene granules on the compressive strength and thermal conductivity of concrete. Nano silica and polystyrene granules were added in proportions (1%, 2%, 3%) to the concrete mixture, and the compressive strength and thermal conductivity of the concrete mixtures were examined. Th...

This study investigated the structural behavior of a beam-slab member fabricated using a steel C-Purlins beam carrying a profile steel sheet slab covered by a dry board sheet filled with recycled aggregate concrete, called a CBPDS member. This concept was developed to reduce the cost and self-weight of the composite beam-slab system; it replaces th...

Currently, increased production of various goods and supplies such as car tires led to an excessive amount of worn tires making disposal a major issue as waste rubber derived from tires are not easily degraded or decomposed therefore many research has been undertaken to use these materials in engineering purposes to reduce their negative environmen...

In this study, the flexural performance of a new composite beam-slab system filled with concrete material was investigated, where this system was mainly prepared from lightweight cold-formed steel sections of a beam and a deck slab for carrying heavy floor loads as another concept of a conventional composite system with a lower cost impact. For thi...

Cement production led to the consumption of high energy and generated harmful gases, such as CO2. Therefore, the use of alternative materials becomes necessary. The research attempts to use palm oil clinker (POC) and ultrafine palm oil fuel ash (UPOFA) as a full replacement of coarse aggregate and partial cement replacement, respectively. This stud...

Fire is considered one of the main risks leading to building collapse. Lightweight concrete comprises a variety of components, each of which has a distinct behavior under the effect of temperature change. A total of 16 concrete mixtures were investigated in this article. A reference mix of concrete comprising simply ordinary Portland cement and ten...

In building constructions, considering sustainability, there is an increased interest in a reduction in landfills, converting waste materials into nanomaterials by using for example waste materials like waste grain wheat, waste ceramic, and slag, decreasing thus also the price of production of concrete and enhancing the properties of construction p...

The production of concrete by replacing cement and aggregates with biomass materials is a low-carbon footprint and low-cost approach. In this study, the influences of nano-palm oil fuel ash (NPOFA) and palm oil clinker (POC) partially replaced instead of cement (0, 15% and 30%) and coarse aggregate (0, 50%, 100%) into sustainable concrete on workab...

In This article the nanomaterial effect on concrete was discussed. Nowadays, nanotechnology has received wide attention to enhance conventional concrete properties. In contrast, the topic of this research is to find thermal insulation and related material with good mechanical properties, so nanomaterial was added to concrete mixtures to take advant...

Ultra-high-performance concrete (UHPC) is a distinguishing material used in new construction and conjunction with conventional concrete. However, some issues limit the wider application of UHPC, such as high autogenous shrinkage, low workability for large-volume production, high cost, and unpredictable peak curing method. This comprehensive study a...

Scientific progress in any country is measured by the importance that is given to scientific research. Recently, the interest in scientific research has increased by the local and international universities in various fields of sciences, given its importance in achieving sustainable development goals, where several countries and universities have i...

The significant sustainability awareness in the construction industry coupled with the need for the industry to reduce its negative environmental impacts has resulted in the use of various ‎industrial wastes in construction ‎applications such as in the production of concrete. Various industrial wastes can be utilized as ‎partial or total replacemen...

Solid waste disposal is one of the major environmental concerns. Disposal of waste glass into open areas and landfills is one of the major threats that pollutes the environment in addition to the cases of health hazards around the world. Recycling the discarded glass as a sustainable construction material have received an increasing attention in th...

Lightweight aggregate concrete (LWAC) has gradually gained popularity as a significant material in the concrete industry worldwide. One of the important lightweight aggregates is palm oil clinker (POC). Moreover, palm oil fuel ash (POFA) can be used as a partial cement replacement in concrete. This paper presents a study in which POFA of Nano-parti...

A sizeable amount of tire rubber waste is generated due to the increasing number of road automobile users all over the world. The accumulation of this waste in the open area poses environmental threats and therefore requires suitable treatments. The use of waste obtained from tire rubber as a construction material could contribute to a circular eco...

The use of nanotechnology in the construction industry and building structures is one of the important topics of construction engineering today. This study aims to discover the effect of Nano-silica (SiO2) on concrete's mechanical and thermal properties, such as thermal conductivity, specific heat capacity, thermal diffusivity, and compressive stre...

Scientific progress in any country is measured by the importance that given to the scientific research. Recently, the interest in the scientific research has increased by the local and international universities in various fields of sciences, given its importance in achieving sustainable development goals, where several countries and universities h...

The interest in a sustainable environment to preserve the raw natural resources and reduce of environmental pollutants resulting from the manufacturing processes has become a major requirement that can be achieved in the field of construction materials technology engineering. The pollutants from iron-making processes or ceramic waste in addition to...

This work is an experimental investigation about the properties of sand-powder adhesive subjected to high temperature. Thus, three main mixtures were tested. These mixes contain three different sand to adhesive ratios; 0:1, 1:1 and 1.5:1. The Simultaneous of Thermal Analyzers (STA); represent real-time measurement, change of sample weight analysis...

The amount of crushed cement concrete continues to increase daily as a result of the demolition of old structures, thereby increasing pollution. To cope with the pressure imposed by the rise in environmental awareness and the stringent disposal regulations set by environmental protection agencies, effective measures for handling and disposing of cr...

The traditional materials used in concrete will run out some day. Therefore, waste materials can be used as an alternative material in concrete production. Palm oil clinker (POC) is one of these wastes. A new method to improve the performance of waste material characteristics is to treat and grind the waste materials to achieve nano-particle size....

In this paper, Solid Works software analysis is used for promote a three-dimension geometry finite element (FE) model for simulating the flexural behavior of I-section &Square hollow part of universal carbon steel beam. Furthermore, the analytical results with the same moment capacity were compared between I-section and square hollow section of uni...

In this paper, Solid Works software analysis is used for promote a three-dimension geometry finite element (FE) model for simulating the flexural behavior of I-section &Square hollow part of universal carbon steel beam. Furthermore, the analytical results with the same moment capacity were compared between I-section and square hollow section of uni...

This research presents an experimental study on the performance of reinforced recycled aggregate concrete (RAC) that contains one of two types of recycled coarse aggregate, one from normal concrete and another from self – compacting concrete (SCC). The replacement percentages (by weight) of natural coarse aggregate with the recycled coarse aggregat...

The current study focuses on the usage of treated domestic wastewater and replacement of mortar sand with recycled alternative materials to satisfy the increasing indigence of natural resources. Blast furnace steel slag in steel making factories is industrial wastes which has the ability to be used as a partial substitute for sand and to completely...

Eggshell (ES) is a bio-waste material obtained from bakers and fast-food restaurants. This waste material is generally disposed of in landfills, causing health hazards and polluting the environment. Eggshell powder (ESP) has high amounts of calcium and can be combined with pozzolanic materials, such as fly ash, which have low calcium content. This...

The zero-based budget represents a system for preparing of the financial budget which includes all the expenses that must be allocated for each new fiscal year. The budget starts from the "zero points" and any function within the unity government is analyzed according to their needs and costs. Then prepare a budget based on the requirements of the...

The zero-based budget represents a system for preparation of the financial budget which includes all the expenses that must be allocated for each new fiscal year. The budget starts from the "zero points" and any function within the unity government is analysed according to their needs and costs. Then a budget is prepared based on the requirements o...

Palm oil fuel ash (POFA) is a by-product from palm oil manufacturing and is currently disposed to open areas and landfills without treatment, thereby causing environment pollution. Grinding POFA to nanoparticles called NPOFA results in increased pozzolanic activity. Meanwhile, eggshells (ESs) are a biowaste from restaurants. They are disposed to la...

This work investigated cement mortars with Nano-SiO2 in terms of features. It also analyzed the mechanical features of cement mortars after adding Nano-SiO2. Nano SiO2 could react with cement to produce new strong bonds to strengthen the concrete. First, hydrophobic Nano SiO2 (HPS) was added to the cement mortars by 0.2, 2.5, 3, 3.5, and 4 wt.% for...

This study investigates the effect of certain parameters on the magnitude of plastic hinge length of RC shear walls and proposes an analytical expression for estimating the plastic hinge length. A finite element model was analyzed and validated with experimental test results for an existing study and a parametric study was performed for it. The est...

The effect of fixed amount of wood ash on the different mortar mixes with other materials and their influence on fresh or hardened concrete mortar properties has been studied. The preparation of Ash become by burn the wood in 200 C, so this process is called as “Wood Ash (WA)”, fumed silica (FS) which is commercial material having Nano particles si...

Earthquake system

A core system for buildings has been recognized as an effective tool for managing the response of the building when an earthquake happens by decoupling the building structure from potentially damaging earthquake-induced forces. A challenging issue in this context is the application of the configuration of the core system. A review of recent studies...

This paper demonstrates the behavior of foamed concrete reinforced with either or both carbon fibers and polypropylene fibers exposed to elevated temperatures. Various volumetric fractions of carbon fibers (0.5, 1 and 1.5%) were used to reinforce foamed concrete mix. Also, hybrid fibers of carbon fibers (CF) and polypropylene fibers (PPF) as 1%CF +...

This paper demonstrates the behavior of foamed concrete reinforced with either or both carbon fibers and polypropylene fibers exposed to elevated temperatures. Various volumetric fractions of carbon fibers (0.5, 1 and 1.5%) were used to reinforce foamed concrete mix. Also, hybrid fibers of carbon fibers (CF) and polypropylene fibers (PPF) as 1%CF +...

Strength of Reactive Powder-Ferrocement Slabs under Static Load.

This study investigated the structural behaviour of reinforced reactive powder concrete (RPC) beams under service load and fire exposure. The beams were composed of hybrid fibres (50% polypropylene fibres and 50% steel fibres) at different volume fractions relative to nonfibrous-reinforced RPC beams. The bottom and both sides of the beams which wer...

Day by day construction industry require large amounts of cement to satisfy development of buildings, facilities and infrastructures, that demand presented undesirable increase in CO2 emitted the environment as 1 ton of cement produce approximately 1 ton of CO2. Aiming to reduce usage of Portland cement new technology of binders was researched such...

A core system for buildings has been recognized as an effective tool for managing the response of the building when an earthquake happens by decoupling the building structure from potentially damaging earthquake-induced forces. A challenging issue in this context is the application of the configuration of the core system. A review of recent studies...

Structural integrity and seismic protection of the buildings against earthquake have been challenging among structural engineers. Many studies have been devoted to development of seismic isolators to improve the seismic behavior of civil structures. This study presents the analysis of building structures with SAP2000 considering soil structure inte...

Palm oil fuel ash (POFA) is a by-product in palm oil manufacturing and is currently disposed to open areas and landfills without any previous treatment, thereby causing environment pollution. The use of small-particle-sized ground POFA to prepare ultrafine POFA (UPOFA) is a suitable method to improve its characteristics as a supplementary cementiti...

Some of the most serious problems of the world today concern elimination of waste and finding a solution for reusing it. Large quantities of waste are generated from manufacturing processes and construction destruction works. Materials waste administration is one of the most important environmental interests in the world today and with the reductio...

In this research, the effect of elevated temperature on the flexural behavior of one-way reinforced concrete slabs under service static loads contain different volume fraction (0.25%, 0.75% and 1.25%) of steel fibers and different addition ratios (15%, 20% and 25%) of fly ash in addition to the reference slabs with not any additives was studied. Fo...

In this research, the effect of the addition of fly ash particles with different weight ratios of 15%, 20%, and 25% as well as the addition steel fibers with different volume fractions of 0.25%, 0.75%, and 1.25% on the mechanical properties of concrete (compressive strength and modulus of rupture) was studied. To carry out this research, ten concre...

In this research, the effect of the addition of fly ash particles with different weight ratios of 15%, 20%, and 25% as well as the addition steel fibers with different volume fractions of 0.25%, 0.75%, and 1.25% on the mechanical properties of concrete (compressive strength and modulus of rupture) was studied. To carry out this research, ten concre...

properties of hardened concrete

The type of bricks and its properties

This presentation shows the branches of civil engineering

Exposure of reinforced concrete buildings to an accidental fire results in deterioration in concrete strength and to concrete cracking. In this study, samples of reinforced concrete slabs were tested to indicate the effect of rehabilitation using fiber carbon polymer armed retrieval tolerability, after exposure to direct flame temperature. Testing...

Deterioration of reinforced concrete structures has become a serious problem in the last decades. This situation is mainly due to corrosion of the embedded steel reinforcing bars in concrete. This has led to the development of new reinforcing materials. With their high strength and corrosion resistance. The present study aims to find the effect of...

steel and iron used in construction

Reactive Powder Concrete (RPC) is an ultra-high performance concrete which has superior mechanical and physical properties, and composed of cement and very fine powders such as quartz sand and silica fume with very low water/ binder ratio and Superplasticizer. Heat treatment is a well-known method that can further improve the performance of (RPC)....

This paper studies the effect management of high temperature on mechanical characteristics of carbon fiber reinforced light weight aggregate concrete. The effect of using high range water reducing agent HRWRA (High range water reducing admixture) with 8% SF (silica fume), as a partial replacement by weight of cement, on the behavior of LWAC (Light...

This paper studies the effect management of high temperature on mechanical characteristics of carbon fiber reinforced light weight aggregate concrete. The effect of using high range water reducing agent HRWRA (High range water reducing admixture) with 8% SF (silica fume), as a partial replacement by weight of cement, on the behavior of LWAC (Light...

This research Studies the possibility of producing self-compacting concrete (SCC) containing Pozzolanic materials and reinforced with different types of fibers , 11% (by weight of cement) of silica fume were used and two types of fiber (Steel, Nylon) with different volume fraction , also it studies the structural behavior of the self-compacted rein...

This study aims to characterize and quantify the mechanical properties of hybrid steel-nylon fiber reinforced concrete. In order to achieve and verify that, 0.5%, 1% and 1.5% fiber percentage by volume of concrete are used in this study with five different mixes of 100-0%, 70-30%, 50-50%, 30-70% and 0-100% for each fibers percentage (nylon to steel...

This study aims to characterize and quantify the mechanical properties of hybrid steel-nylon fiber reinforced concrete. In order to achieve and verify that, 0.5%, 1% and 1.5% fiber percentage by volume of concrete are used in this study with five different mixes of 100-0%, 70-30%, 50-50%, 30-70% and 0-100% for each fibers percentage (nylon to steel...