Use Of Steel Fibers Research Articles

Effect use of steel fiber on mechanical properties of concrete mixture

In this paper the influence of commercialize steel fiber with properties of hooked end with 60 mm length and 0.75 mm diameter on the mechanical properties of concrete with three varied volumes of steel fiber 0%, 1% and 2% by volume were added to concrete mixes have been investigated. The design compressive strength considered was 25 MPa. Cubes specimens of size 100 mm x 100 mm x 100 mm to test the compressive strength were prepared for the time of 7th and 28th day, and flexural specimens with 100 mm x 100 mm x 500 mm were prepared. In this study, after 28 days of curing, compressive and flexural strength were determined. The use of steel fiber has shown a significant change on the mechanical properties of the concrete, in particular the compressive and flexural strength with the increase of the volume fraction of steel fibers. The test results show that the use of steel fiber improves the compressive strength, moreover change the failure type to ductile failures.

Effect use of steel fiber on mechanical properties of concrete mixture

In this paper the influence of commercialize steel fiber with properties of hooked end with 60 mm length and 0.75 mm diameter on the mechanical properties of concrete with three varied volumes of steel fiber 0%, 1% and 2% by volume were added to concrete mixes have been investigated. The design compressive strength considered was 25 MPa. Cubes specimens of size 100 mm × 100 mm × 100 mm to test the compressive strength were prepared for the time of 7th and 28th day, and flexural specimens with 100 mm × 100 mm × 500 mm were prepared. In this study, after 28 days of curing, compressive and flexural strength were determined. The use of steel fiber has shown a significant change on the mechanical properties of the concrete, in particular the compressive and flexural strength with the increase of the volume fraction of steel fibers. The test results show that the use of steel fiber improves the compressive strength, moreover change the failure type to ductile failures.

Mechanical Properties of Fibre Reinforced Self Compacting Concrete using Rice Husk Ash

Self-compacting concrete (SCC) is relatively a recent development in the construction world. SCC can flow through dense reinforcement under its own weight without any segregation, bleeding, and vibration. The use of steel fibers is being encouraged to increase mechanical characteristics of SSC. However, adding fibers to fresh concrete results in loss of workability. Steel fibers operate as crack arrestors in concrete and extend the span of structures. In the present study, the mechanical properties of SCC with cement is partially replaced by rice husk ash (RHA) & P500 (ultra-fine fly ash). A total of 5 mixes with 0.3 W/C ratio were cast for 7, 28 and 56 days water curing. The replacement of fibres is considered as 0%, 0.5%, 1%, 1.5%, and 2% by weight of cement. Workability, Compressive, Split Tensile and Flexural strength is studied in this investigation. Superior strength was observed at optimum dosage of steel fibers at 1.5% by weight of cement.

Axial compressive behavior of confined steel fiber reinforced high strength concrete

Concrete is brittle in nature which is why different materials have been used to improve this inherent behavior of concrete. In this experimental study, the effect of simultaneous use of steel fibers and confinement on high strength concrete and the corresponding post peak response of fiber reinforced concrete is investigated. A total of 39 high-strength concrete (incorporating varying amounts of steel fibers) cylinders were casted. The steel fiber volume fraction (Vf) was varied as 0.5%, 1.5% and 2.5%. 18 samples were confined with Carbon Fiber Reinforced Polymer (CFRP) sheet, and 9 samples were casted in steel pipe confinement, whereas 12 control specimens (without confinement) were also prepared. The samples were tested under axial compression. The results confirmed that the use of steel fiber had minute effect on the compressive strength, whereas it significantly improved the ductility and enhanced the post peak behavior of concrete. The confinement significantly contributed towards the compressive strength increase. The combined use of steel fibers and confinement in concrete columns can be viewed as extremely beneficial as it not only increases the concrete compressive strength but also solves the issue of brittle failure to an appreciable extent.

Numerical and analytical modeling of fiber-matrix bond behaviors of high performance cement composite

Use of steel fiber in high performance cement composite (HPCC) can enhance its strength and toughness, which is achieved through stress transfer from fiber to matrix at interface. In this study, a numerical model in Finite Element Method and three analytical models were proposed to predict bond behaviors between HPCC matrix and three different shaped (straight, hooked, and corrugated) steel fibers at different ages. The proposed numerical model considered an enhancement factor based on the modified interfacial friction law (MIFL). In the analytical models, frictional force following a power function was considered. Predicted results from those numerical and analytical models were compared with existing models and corresponding experimental results. The comparisons indicated that the enhancement factor employed in the MIFL efficiently reflected the change in fiber-matrix bond properties with age. The predicted pullout load-slip relationships and energies from those proposed models showed higher accuracy than those from the existing models.

Hybrid fiber reinforced concrete-filled square stub columns under axial compression

The main aim of this study is to compare the axial load, ductility, and toughness capacities of square concrete-filled carbon steel (CFCST), stainless steel (CFSST) and aluminum tube (CFAT) columns filled with plain concrete, single (steel) and hybrid (steel + synthetic) fiber-reinforced concrete under axial compression. To this end, the enhancement in axial load, ductility and toughness capacities of steel and hybrid fiber-reinforced CFCST, CFSST, and CFAT columns were obtained with regard to fiber volume ratio (0.5 and 1.5%), compressive strength of concrete (30 and 70 MPa) and the steel tube thickness (2, 3 and 4 mm). A total of 99 hollow, steel and hybrid fiber-reinforced CFCST, CFSST, and CFAT columns were tested under axial compression. The results showed that although the use of steel and synthetic fibers in single and hybrid form is very limited for enhancement of the axial load capacities of CFAT, CFCST and CFSST columns, the enhancement in ductility and post-peak toughness capacities are notable especially for CFCST and CFSST columns. However, the effects of steel and synthetic fibers on post-cracking behavior of the CFAT columns are not significant due to early rupture of AL tubes that cause highly brittle behavior after first peak load. In addition to this, the use of steel and synthetic fibers in hybrid form is slightly better at improving the ductility and toughness capacities of most of the CFAT, CFCST and CFSST columns than the use of steel fibers in single form.

Soil Stabilization using Geosynthetic Material (Steel Fibres)

Soil stabilization is the process which involves enhancing the physical properties of the soil in order to improve its strength, durability etc. by blending or mixing with additives. The different types of method used for soil stabilization are: Soil stabilization with cement, Soil stabilization with lime, Soil stabilization using bitumen, Chemical stabilization and a new emerging technology of stabilization by Geo textiles and Geo synthetic fibers. In this study, we are making use of Steel fibers as geo synthetic material for stabilization of soil. With the introduction of Steel fibers to the soil the CBR values will improve and thickness of pavement layer also gets reduced. It also reduces the intensity of stress on subgrade. Steel fibers is such a geosynthetic material which is effectively accessible, ecofriendly and furthermore savvy. With the use of soil adjustment strategy in development the general expense gets diminished when contrasted with the normal technique for development. The Highway Research Board (HRB) order of the dirt strata like dark cotton soil and sedu soil is finished utilizing appropriate examining system, for example, Core Cutter Method. To decide the attributes like Grading by Sieve Analysis, Atterbergs Limits i.e Liquid farthest point utilizing Cone Penetration Method and Casagrande Method, Plastic breaking point by rolling the example to 3mm breadth string, Shrinkage limit utilizing Shrinkage mechanical assembly, Optimum Moisture Content and Maximum Dry Density utilizing Standard Proctor Test and furthermore California Bearing Ratio by leading CBR test. The pavement thickness was designed using pavement design catalogues published by IRC SP:20-2002. The estimation for the road is done by considering the item such as Jungle Cutting, Earthwork Excavation for Roadway and Drains, compacting and grading etc., as per SR 2016-17, PW, P and IWT circle Dharwad and suggestion of specification for the mixture of Steel fibers as Geo Synthetic material for stabilization using CBR value by CBR Test and Shear strength using Unconfined Compression Test. The different tests were conducted in order to determine the different characteristics and properties of the black cotton soil and obtained with following results. The liquid limit of the soil with addition of Steel fibers was found to be decreasing when compared to liquid limit of soil alone. The plastic furthest reaches of the dirt diminished with the expansion of filaments. The shrinkage furthest reaches of the dirt was expanded with increment in strands. The MDD of the dirt with expansion of Steel filaments by weight of soil is observed to increment upto 0.75% after that it diminishes and the comparing OMC is diminished with expansion of strands. The shear quality of soil diminished significantly with expansion of strands. The CBR estimation of the dirt expanded significantly. The distinctive tests were led so as to decide the diverse qualities and properties of the sedu soil and acquired with following outcomes. The fluid furthest reaches of the dirt alone was observed to be 36.5%. The MDD of the dirt with expansion of 0.25%, 0.5% Steel strands by weight of soil is observed to be diminished by 0.83% and 0.75% , 1.0% Steel filaments by weight of soil is observed to be expanded by 0.11 % and 16.98% separately and the relating OMC is diminished by 15.62%, 21.87% and 33.75% individually. The shear quality of the dirt with the expansion of 0.25%, 0.5%, 0.75% and 1% of Steel strands is observed to be diminished by 38.57%, 38.57%, 35.25% and 5.85%. The CBR estimation of the dirt with expansion of 0.25%, 0.5%, 0.75% and 1.0%, Steel filaments by weight of soil is observed to be expanded. From the restricted research center investigation directed we reasoned that the 0.75% of Steel fiber can generously improve the properties of Black cotton soil. Furthermore, in this way 0.75% of Steel fiber is the ideal fiber content for dark cotton soil. The design thickness of flexible pavement before stabilization is obtained as 450mm and after stabilization is obtained as 250mm.The estimated cost for constructing flexible pavement before stabilization of soil is obtained as 4018050 Rs /Km and after stabilization of soil is obtained as 3721894Rs/Km. The estimated cost after stabilization is found to be decreased by 7.37%.

Effect of steel and polypropylene fibers on the quasi-static and dynamic splitting tensile properties of high-strength concrete

The influence of steel-polypropylene hybrid fibers on the tensile properties of high-strength concrete is investigated by quasi-static and dynamic Brazilian disc splitting tests. The failure modes of fiber reinforced concrete specimens and the influence of different fiber mixing ratios on the splitting tensile strength of the specimens are analyzed. The research results indicate that the plain concrete and single-doped polypropylene fiber concrete specimens show straight cracks along the loading line during the experimental process, showing the brittle failure characteristics; while the single-doped steel fiber concrete and hybrid fiber concrete specimens show more bifurcated micro-cracks along the loading line, showing the ductile failure characteristics. The splitting tensile strength of concrete specimens increases with the increase of steel fiber content, and increases first and then decreases with the increase of polypropylene fiber content. The mixed use of steel fiber and polypropylene fiber not only improves the splitting tensile strength of concrete specimens, but also reduces the risk of brittle failure of concrete. Especially when the steel fiber content is S2 (2.5%), the hybrid of steel-polypropylene fibers has a great improvement effect on the splitting properties of concrete specimen. In addition, it is found that the splitting tensile strength of fiber reinforced concrete specimens increases with the increase of force loading rate, showing the enhancing effect of loading rate. Comparing the rate-enhancing effect of specimens with different fiber content, it is found that the change of fiber content has a certain influence on the loading rate-enhancing effect of specimens.

PENGARUH TIPE BENTUK SERAT BAJA TERHADAP SIFAT FISIK DAN MEKANIK BETON BERSERAT BAJA MEMADAT SENDIRI

The weaknesses of the concrete material are weak to the tensile strength and brittle. The solution to overcome this weakness is by adding fibers like steel fiber. The use of steel fibers has constraints in workability. So as to facilitate work in the field, it was developed to become self-compacting concrete (SCC). SCC which uses additional steel fibers is known as steel fibers reinforced self-compacting concrete (SFRSCC). The development of steel fiber shapes from beginning to the present has produced many types of shapes, including of straight, crimped, and hooked. Based on the various shapes of steel fiber, further development of SFRSCC technology needs to be carried out. This paper analyzed the influence of steel fiber types consisting of the three types of shapes on the physical and mechanical properties of SFRSCC. The methodology in this paper is to use literature review and experimental methods. The results of the analysis show that all types of steel fibers result in a decrease in workability. The biggest decrease is using hooked type steel fibers, and the smallest uses straight type. The results of the mechanical properties analysis showed the opposite, the largest increase in mechanical properties was obtained using hooked type, and straight type. For optimum physical and mechanical properties, crimped type is recommended as a type of steel fiber in the SFRSCC.

Investigation of mechanical properties and shrinkage of ultra-high performance concrete: Influence of steel fiber content and shape

Use of steel fibers in ultra-high performance concrete (UHPC) plays a significant role in enhancing strength and toughness and restraining shrinkage. This paper investigates the effect of steel fiber content and shape on mechanical strength, toughness, and autogenous and drying shrinkage of UHPC. Three steel fiber shapes, including straight, corrugated, and hooked fibers, with volume fraction ranging from 0 to 3% were employed. Compressive, flexural, and fiber-matrix bond strengths were evaluated. A statistical quadratic model and the Composite Theory were employed to predict the flexural strength of UHPC. Test results indicated that the increase in fiber volume can enhance the compressive and flexural strengths of UHPC and reduce shrinkage. The optimum fiber content for strength and shrinkage was found at 2%, beyond which the strength was slightly increased and the shrinkage was slightly decreased. For a given fiber content, the use of hooked fibers was most efficient in improving fiber-matrix bond and flexural strengths and reducing shrinkage. The flexural strengths of UHPC made with various fiber contents and shapes can be predicted using the proposed quadratic model and the Composite Theory. The latter considers the primary parameters affecting performance, including bond strength, matrix properties, and fiber characteristics. Finally, several models were used to simulate autogenous shrinkage behavior of UHPC and optimal models were found.

Mechanical performance of concrete made of steel fibers from tire waste

Currently, the disposal of used tires is a worldwide challenge, due to their non-degradability. Therefore, recycling has become a potential solution for managing such waste. During recycling, materials such as rubber and steel are recovered from the used tires. The use of steel fibres, recovered from tire waste, as a raw material to reinforce concrete is an environmentally friendly and economically viable solution to manage the end-products of tire recycling. Few studies have been carried out to study the behaviour of fibre-reinforced concrete made using steel fibres recovered from tire waste. However, it has been found that there is the potential to reuse steel fibres recovered from tire waste (RF) as an alternative building material to manufactured steel fibres (SF). Nevertheless, more research is needed to verify that the structural performance of recycled fibre reinforced concrete (RFRC) is similar to that of manufactured fibre reinforced concrete (SFRC). Therefore, this study focuses on the laboratory testing of the mechanical properties of RFRC and compares them with those of SFRC. Moreover, the flexural performance of reinforced concrete beams cast with RF and SF have been tested to compare their performance.

A new constitutive model for steel fibre reinforced concrete subjected to dynamic loads

The use of steel fibre reinforced concrete (SFRC) in protective structures has gained worldwide interest due to its superior mechanical characteristics. At present, hydrocode material models have been frequently used to simulate the dynamic behaviour of SFRC subjected to impact and blast loads. However, as these material models are developed for normal concrete, much effort is required for model calibration, and their other drawbacks, such as the neglect of shear dilation and the inappropriate consideration of strain-rate effect, may lead to inaccuracies in numerical predictions. In this study, a new constitutive material model is developed for SFRC, in which the damage evolution, shear dilation and strain-rate dependent material properties are properly taken into account. The new material model could accurately capture the mechanical behaviours of SFRC (i.e. strain hardening and softening in both compression and tension) with simple input parameters. It is then incorporated into the commercial finite element code LS-DYNA to simulate the structural behaviour of SFRC components under various loading conditions. The effectiveness and accuracy of the new material model are validated against the reported experimental results.

Influence of Hooked-EndSteel Fibers on Fresh and Hardened Properties of Steel Fiber Reinforcement Self-Compacting Concrete (SFRSCC)

The use of steel fiber in SCC is known as steel fiber reinforcement self-compacting concrete (SFRSCC). Since its development, steel fiber consists of various shapes such as straight, crimped, and hooked-end. The purpose of this research is to analyze the influence of shape variation and volume fraction (Vf) of hooked-end steel fibers to fresh and hardened properties of SFRSCC. Fresh concrete testing is done based on EFNARC standard such as Slump flow test, V-funnel test, and L-box test. Hardened concretetesting is done in the form of compressive strength and splitting tensile strength. The steel fiber used is a hooked-end type which consists of three types namely, 3D, 4D, and 5D with value of volume fraction (Vf) are 0.50%, 0.75%, and 1.00%. The results of this study were indicated the effect of volume fraction (Vf) increasing can decrease the workability of SFRSCC. Mix design SFRSCC in this research meets SF1 and SF 2 filling ability classes, Viscosity VS2, VF1 and VF 2 class, and passing ability PA 2 class. For mechanical properties obtained maximum compressive strength of 55.85 MPa with percentage increase of concrete without steel fiber equal to 32.66%, and maximum splitting tensile strength of 6.38 MPa with percentage increase of 82.81%. The maximum mechanical properties are obtained by volume fraction (Vf) = 1.00% and 5D type steel fiber.

Influence of steel fibre, electrical waste copper wire fibre and electrical waste glass fibre on mechanical properties of concrete

Fibre-reinforced concrete (FRC) contains fibrous material which increases its structural integrity. The application of irregular arrangement of fibres to concrete altogether upgrades its essential characteristics, for instance, static flexural strength, influence quality, elasticity and flexural stiffness. Filaments are added to cement to control breaking because of plastic shrinkage and to drying shrinkage. This paper exhibits the use of steel fibre, electrical waste copper wire fibre and electrical waste glass fibre of various percentages of volume fractions such as 0.25%, 0.5%, 0.75%, 1.0% and 1.25% incorporated in concrete. Mechanical properties such as compressive strength, splitting tensile strength and flexural strength tests were conducted for normal concrete and fibre reinforced concrete for a curing period of 7 days, 14 days and 28 days. In addition to that modulus of elasticity of concrete for various percentages of fibre content was investigated for a curing period of 28 days. The test results of fibre reinforced concrete were compared with normal concrete to determine the influence of fibres used.

Bond behavior between lightweight aggregate concrete and normal weight concrete based on splitting-tensile test

Abstract Lightweight concrete (LWC) is an advanced concrete with the combined advantage of being both lightweight and high-strength. LWC is an excellent option for decreasing the self-weight of a structure while offering many additional benefits such as the comprehensive utilization of resources and environmental protection by incorporating industrial solid wastes, including fly ash and silica fume. This study examined the bond properties of LWC and normal weight concrete (NWC) based on splitting-tension tests and by considering the relevant factors of LWC, such as its strength grade, interfacial agent, use of steel fibers and interface roughness. Seven concrete mixtures were tested, including six LWC mixtures, with compressive strengths between 40 and 60 MPa and a density range between 1600 and 1800 kg/m2, and a single NWC mixture, with a compressive strength of 60 MPa. Within these mixtures, three interfacial agents, three levels of interface roughness, and a single type of steel fiber were adopted. Overall, the results indicate that all of the factors mentioned above significantly influence the bond strength between NWC and LWC. Based on the test data and various calculations relevant to NWC and LWC, certain limits are proposed that fall within accepted methods given in fib Model Code 8.

Effect of steel fiber on biaxial flexural property of textile reinforced concrete with basalt fiber mesh in slab test

In order to investigate the influence of steel fibers on the biaxial bending properties of basalt fiber textile reinforced concrete, two-way slab test in accordance with EFNARC was introduced. The biaxial flexural properties of the basalt fiber textile reinforced concrete slab, the steel fiber reinforced concrete slab and the combined use of steel fiber and basalt fiber textile reinforced slab were compared. The slab without any reinforcement and the conventional steel mesh reinforced concrete slab were also studied as reference. The biaxial reinforcement of the basalt fiber mesh was analyzed and the feasibility of using steel fiber and basalt fiber mesh to replace the conventional steel mesh was studied. The results show that the inner force redistribution and the ultimate load of the slab increase obviously with the addition of the basalt fiber mesh, but the failure pattern of the slab still demonstrate brittle feature. The combined use of steel fiber and basalt fiber mesh illustrates positive hybrid effect, the toughness of the slab increases significantly. In the serviceability stage, the flexural properties of the slab reinforced with 30 kg/m3 steel fiber and basalt fiber mesh are higher than the conventional steel mesh reinforced slab, it means that the conventional steel mesh can be replaced by the combined use of the steel fiber and the basalt fiber mesh.

Experimental analysis of load capacity in beams with steel fiber reinforcement on the compression face

Abstract The use of steel fibers in the concrete is mainly aimed at increasing the post-peak toughness, due to the adhesion of the fibers to the cementitious matrix. However, there are several typologies of steel fibers, and the main differences are in the form (relation between length and diameter), fiber geometry, and the characterization between macrofibers and microfibers, which generally serve to reduce macrocracking and microcracking, respectively. In this context, this work evaluated the use of microfibers (20 kg/m³ or volume equal to 0.26% (Vf) of concrete volume), macrofibers (20 kg/m³ or Vf = 0.26%) and hybridization (10 kg/m³) + macrofibers (10 kg/m³) inserted in a high strength concrete (fc = 80 MPa). Two types of steel fibers were used: macrofibers with a diameter of 0.75 mm and a length of 60 mm (a form factor of 80); and microfibers with a diameter of 200 μm and a length of 13 mm (a form factor of 65). The fibers were used in concrete to act as a reinforcement on the compression face of reinforced beams (12×20×160cm), and the mechanical characteristics of the concretes were analyzed: (i) flexural strength in prismatic specimens (10×10×35 cm), (ii) compressive strength in cylindrical specimens (20×Ø10 cm) and (iii) modulus of elasticity in cylindrical specimens (20×Ø10 cm). Analysis of the results showed that compressive strength increased by approximately 8% for all the compositions with fibers compared with concrete without fibers. Similar behavior was verified for the modulus of elasticity. In the prismatic specimens (10×10×35 cm) an increase in toughness was observed, with the macrofibers performing better. In beams measuring 12×20×160 cm, an increase in bearing capacity was verified regarding cracking time and plastic rotation, with the best result also obtained using macrofibers. Overall, it can be concluded that the application of reinforcement with steel fibers in the compression face of beams was efficient, even though it did not present a significant increase in compressive strength, a fact that could be correlated with the reduced volume of fibers used.

Axial compressive behaviour of special-shaped steel-fibre-reinforced concrete columns

Special-shaped columns are extensively used in residential and official buildings as they increase the efficiency of indoor space. However, many studies on normal special-shaped concrete columns have demonstrated their poor ductility and requirement for additional reinforcement. To overcome these shortcomings, a novel cross-shaped column was designed to enhance the ductile deformation. This column integrates high-performance concrete (HPC) with high-strength stirrups (HSS). Ten cross-shaped column specimens were tested under axial compressive loading. The parameters investigated were the spacing of the stirrups, the strength of the HPC and the content of steel fibre. The test results showed that the HSS improved the axial compressive bearing capacity and ductility, and a close tie spacing improved the confinement, resulting in a significant enhancement of post-peak ductility with a moderate increase in column axial bearing capacity. Increasing the strength of the HPC did not effectively enhance the ductility for a large tie spacing. The use of steel fibre was found to enhance the bearing capacity and ductility, and a higher steel fibre content did not significantly delay the decrease in bearing capacity. The analytical results of existing high-strength concrete and fibre-reinforced concrete confinement models were compared with the test data and several parameters were assessed. The results indicate the need to develop confinement models specific to special-shaped columns.

Development of high strength self-compacting fibre reinforced concrete for prefabricated concrete industry

Prefabricated construction is an emerging industry in Australia and considered a key mechanism to boost productivity in the construction industry. The use of fibre reinforced concrete has a huge potential in the prefabricated industry as the concrete can be delivered straight to the precast mould, eliminating in many cases the steel reinforcement, thus increasing production quotas and cost savings. Such results can be further improved by utilising self-compacting concrete reinforced with fibres. Although the use of steel fibres as reinforcement is now well established, in the precast industry thin walls and shape of the moulds can be a limitation to steel fibre as well as work health and safety concerns for handling. Under such conditions, the use of polymeric fibres can be extremely beneficial, reducing labour hours and placement time as well as improving safety. This paper reports the development of high strength self-compacting fibre reinforced concrete for application in prefabricated concrete industry, exploring the effect of Forta-Ferro and ReoShore fibres on concrete fresh and mechanical properties.

Improvement the Properties of High Strength Fly Ash Based Geopolymer Concrete by Using Cement

Geopolymer concrete was introduced to decrease the consumption of Portland cement, reduce the emission of CO2 and produce alternative binders by applying by-products materials such as fly ash. This study the effect of steel fiber on the fresh and hardened properties of geopolymer concrete and also aimed to improve the properties of this type of concrete by replacing the fly ash by Portland cement by 5, 10, 15, 20 and 25% by weight. The results demonstrated that the use of steel fiber leads to improve compressive, splitting tensile and flexural strengths and reduce the flowability and drying shrinkage. The results also showed that the compressive strength of geopolymer concrete increased with increasing the replacement level up to 25%, the increase reached to 40.24 and 34.66% at 7 and 28 days respectively. Splitting tensile strength and flexural strength also increased with the replacement level of fly ash by cement. The results also revealed that the drying shrinkage of fly ash geopolymer concrete increased with cement replacement level.