Tensile Strength Of Concrete Research Articles

Compressive membrane action in axially restrained hollow core slabs: Experimental investigation

AbstractWhen a concrete slab is excessively loaded due to an accidental event, compressive membrane action can be activated in order to generate an alternative load transfer to the remaining supports, which can considerably enhance the load‐carrying capacity. This can increase the structural reliability of the components, delay or even prevent a progressive collapse and consequently increase the robustness of concrete structures. Although the beneficial effects of compressive membrane action in reinforced concrete slabs have been recognized for decades, only limited research has been focusing on this effect in prestressed concrete members, like hollow core slabs. Therefore, a novel real‐scale test set‐up has been developed in order to assess this phenomenon in real‐scale hollow core slabs. The results indicate that, despite the presence of the large hollow cores, compressive membrane action can significantly improve the load‐carrying capacity of hollow core slabs under excessive loading. In parallel, a numerical finite element model has been established in order to model the structural behavior (i.e., compressive membrane action) as per the investigated test program. The model was able to correlate the results from the experiments very well, and emphasized the large influence of the concrete tensile strength on the ultimate failure load of concrete hollow core slabs in compressive membrane action.

Effective reinforcement ratio of RC beams: Validation of modelling assumptions with high‐resolution strain data

AbstractConcrete tensile stresses influence the cracking behaviour and the stiffness of reinforced concrete (RC) members. Most design codes account for this tension stiffening effect using an effective reinforcement ratio. Although this ratio has a significant influence on the design of RC structures, its quantification is controversial in many cases, and typically relies on empirical geometry‐based expressions. One main reason for this knowledge gap is that the area of concrete in tension can only be verified indirectly, for example, through crack widths and spacings and using a suitable mechanical model. This indirect validation is subject to considerable uncertainty as it depends on parameters that scatter (e.g., bond stresses and the concrete tensile strength), and further assumptions relating internal stresses to the applied loads are required. This article outlines how refined measurements of the reinforcing steel strains and the concrete deformations in the compression zone, combining distributed fibre optic sensing (DFOS) and digital image correlation (DIC), can be used in order to obtain a more reliable quantification of the parameters affecting tension stiffening and hence, the effective reinforcement ratio. Selected models are validated against experimental data of an RC beam tested under four‐point bending, underlining the potential of DFOS and DIC as valuable tools for a better understanding of RC structures and the enhancement of mechanical models.

Experimental investigation on mechanical properties of concrete using different sources of water for mixing and curing concrete

The quality of the ingredients used in the production of concrete determines its strength. Mixing and curing water is one of the components required, and it should be suitable for producing concrete. Impurities in water can reduce concrete strength and induce corrosion of reinforcement, hence water quality is critical. In developing countries such as Ethiopia, the usage of potable water is increasing, which can result in a decrease in freshwater availability. As a result, other sources of water were utilized as a substitute for concrete mixing and curing. This study examined the effects of various water sources on the mixing and curing of concrete. In this study, water samples were collected from different water sources (river water, deep well water, and rainwater), and their chemical properties were conducted based on standard laboratory procedures to identify the constituents. Experimental tests were conducted on cement setting time, workability of concrete, compressive, split tensile, and flexural strength of concrete. The concrete grade C-25 with a cube compressive strength of 25 MPa was prepared using the identified water sources, and testing was performed at the curing age of 7 and 28 days. The impurities observed in the water sources are within the specified limit as per the ASTM C94/C1602. The initial and final setting time of cement using each water source showed an insignificant deviation from the control samples. The results obtained from the compressive strength test of concrete cubes cast at the curing ages of 7 and 28 days using river water, deep well water, and rainwater satisfied 90% of the control strength. Compressive strength testing of cubes using potable water for mixing and other sources of water used for concrete curing only, river water shows less than 90% of the control strength. Compressive strength test of cubes used a similar source of water for both concrete mixing and curing, only deep well water satisfied 90% of the control strength. The effect of identified water sources on concrete split tensile and flexural strength results is comparable to that of compressive strength results. River water shows improved performance for concrete mixing and curing, and it can be properly utilized for concrete production.

Mechanical properties of asphalt concrete modified with carbon nanotubes (CNTs)

Three different percentages of carbon nanotubes (CNTs) (0.1%, 0.5%, and 1% by mass of asphalt cement) were used to modify conventional asphalt cement (60/70) in this study. Mechanical properties of modified asphalt cement and mixture were evaluated. Penetration grade, kinematic viscosity, softening point and dynamic shear rheometer test were measured to evaluate physical properties of modified asphalt cement. The results exhibited that modifying asphalt cement with CNTs decreased its penetration and increased its kinematic viscosity and softening point. Rutting parameter increased with CNTs at the given temperature for both unaged and RTFOT-aged samples. Marshall stability tests, low temperature cracking tests, indirect tensile tests and wheel tracking tests were conducted to assess the mechanical performance of modified hot asphalt mixture. The Marshall stability increased with CNTs but no significant difference at 0.5 and 1.0 wt%, while Marshall flow decreased with CNTs. The results of wheel tracking test showed that rut depth decreased by 45% upon adding 0.5% CNTs by weight of asphalt cement; also, this percentage of CNTs endowed improvement in low temperature cracking and indirect tensile strength of the asphalt concrete. This study underlines that adding CNTs into asphalt cement enhances the performance of asphalt concrete pavement in both hot and cold weather, which in turn prolongs the pavement’s service life and saves maintenance expenses.

Pineapple leaf fiber (PALF) waste as an alternative fiber in making concrete

Indonesia is the 9th largest pineapple producer in the world with a production of 1.39 million tons per year. this makes the pineapple leaf fiber (PALF) waste available abundantly in Indonesia. Palf waste has not been widely used in Indonesia. palf is usually used as fabric for textiles or yarn to be used as clothes and as handicrafts. palf has excellent mechanical properties and is environmentally friendly. in this study palf is used as a material for construction. Adding fiber to the concrete mixture is one way to minimize cracks in the concrete. This study aims to increase the compressive strength, tensile strength of concrete and utilize palf potential as construction material. This study compares the compressive strength and tensile strength of normal concrete against compressive strength and tensile strength of concrete with the addition of pineapple fiber with variations of 0%, 0.5 %, 1%, 1.5% to the weight of cement. The specimen used was a cylinder with a diameter of 15cm and a height of 30cm. The test is carried out on specimens with the age of 28 days. Experimental results show that inclusion of Palf improves the split tensile strength and compressive strenghth of concrete.

Quantification of the Influence of Concrete Width per Fiber Strand on the Splitting Crack Failure of Textile Reinforced Concrete (TRC).

The composite material textile reinforced concrete (TRC) requires a high bond performance between the fiber strand and the concrete matrix. While the influence of the textile on bond behavior is well known, in this publication the influence of the concrete matrix is investigated by means of single-sided pull-out tests. The results of the presented study show dependence between the concrete strength and bond performance of the composite material. When a concrete of a higher-strength class is used, the bond-flow–pull-out distance curve shifts upward independent of the textile geometry and the yarn impregnation. A simplified model is presented to predict the occurrence of a crack along the fiber strand. This model serves as a basis to investigate the correlation between concrete width per fiber strand and resistance against a splitting crack. The effective concrete tensile strength decreases to about 35% when the concrete width is increased from 10 mm to 50 mm. To quantify the decrease, a mathematical relationship, which describes the test results independent of textile and concrete type, is proposed.

Prediction of concrete strengths enabled by missing data imputation and interpretable machine learning

Machine learning (ML)-based prediction of non-linear composition-strength relationship in concretes requires a large, complete, and consistent dataset. However, the availability of such datasets is limited as the datasets often suffer from incompleteness because of missing data corresponding to different input features, which makes the development of robust ML-based predictive models challenging. Besides, as the degree of complexity in these ML models increases, the interpretation of the results becomes challenging. These interpretations of results are critical towards the development of efficient materials design strategies for enhanced materials performance. To address these challenges, this paper implements different data imputation approaches for enhanced dataset completeness. The imputed dataset is leveraged to predict the compressive and tensile strength of concrete using various hyperparameter-optimized ML approaches. Among all the approaches, Extreme Gradient Boosted Decision Trees (XGBoost) showed the highest prediction efficacy when the dataset is imputed using k-nearest neighbors (kNN) with a 10-neighbor configuration. To interpret the predicted results, SHapley Additive exPlanations (SHAP) is employed. Overall, by implementing efficient combinations of data imputation approach, machine learning, and data interpretation, this paper develops an efficient approach to evaluate the composition-strength relationship in concrete. This work, in turn, can be used as a starting point toward the design and development of various performance-enhanced and sustainable concretes.

Non-Destructive Multi-Method Assessment of Steel Fiber Orientation in Concrete

Integration of fiber reinforcement in high-performance cementitious materials has become widely applied in many fields of construction. One of the most investigated advantages of steel fiber reinforced concrete (SFRC) is the deceleration of crack growth and hence its improved sustainability. Additional benefits are associated with its structural properties, as fibers can significantly increase the ductility and the tensile strength of concrete. In some applications it is even possible to entirely replace the conventional reinforcement, leading to significant logistical and environmental benefits. Fiber reinforcement can, however, have critical disadvantages and even hinder the performance of concrete, since it can induce an anisotropic material behavior of the mixture if the fibers are not appropriately oriented. For a safe use of SFRC in the future, reliable non-destructive testing (NDT) methods need to be identified to assess the fibers’ orientation in hardened concrete. In this study, ultrasonic material testing, electrical impedance testing, and X-ray computed tomography have been investigated for this purpose using specially produced samples with biased or random fiber orientations. We demonstrate the capabilities of each of these NDT techniques for fiber orientation measurements and draw conclusions based on these results about the most promising areas for future research and development.

Investigating the mechanical performance of nano additives reinforced high-performance concrete

It is known that nanomaterials have been broadly employed worldwide as reinforcements for the production of high-strength and high mechanical performance concrete-based structures.Hereinafter, high-performance concrete (HPC) modified with three types of additives were synthesized: exfoliated nano clay (NC), nano-silica (NS), and hybrid particles [silica fume (SF) & limestone (LS)]. The compressive, splitting tensile and flexural strengths, were investigated at 28 days of hydration.The exfoliated NC was simply prepared via exfoliating the thermally activated ordinary clay with the aid of organic ammonium chloride. The results revealed that all types of the employed additives provided an augmentation in the mechanical properties of the hardened concrete mixes especially the mixes with a cement content of 350 kg/m3. Furthermore, the addition of 6% NC has improved the compressive strength of concrete with 350 kg/m3 by 17.06%, the splitting tensile strength by 7.32%, and the flexural strength by 13.21%. Furthermore, the compressive, splitting tensile and flexural strengths of the same concrete were enhanced by 9.57%, 12.1%, and 32.87% respectively, by adding 3% NS. Finally, incorporating (7.5% SF + 2.5% LS) led to an increase in the compressive, splitting tensile and flexural strengths of concrete by 10%, 2.64%, and 51.14%, correspondingly.

Experimental investigation on rice husk ash and coconut shell used in building materials

It is found that there are so many wastes which can be used in traditional concrete like E- wastes. Coconut shell and rice husk ash are also the main waste that can be used in traditional concrete. The coconut shells were taken on 10 % with replacement of coarse aggregate and rice husk ash were taken on 5 %, 10 %, 15 %, 20 % & 25 % with partial replacement of cement. It is found that compressive strength and tensile strength of concrete is increased. The volume of concrete also increased as replacement increased total cost of concrete is reduced by replacement coarse aggregate by coconut shells. Total cost of cement is reduced by replacing cement by rice husk ash. This coconut shell can be crushed and used as a coarse aggregate in production of concrete. Coconut shell concrete (CSC) could be used in rural areas and places where coconut is abundant and may also be used where the conventional aggregate is costly. The high cost of conventional construction material affects the economy of structure. It is becoming more difficult to find natural resources. Use of waste material not only helps in getting them utilized in cement, concrete and construction materials but also has numerous indirect benefits such as reduction in landfill cost savings in energy and protecting the environment from possible pollution effects. The characteristics properties of concrete such as compressive strength, split tensile strength and flexural strength using the mix made by replacing coarse aggregate with crushed coconut shell aggregate were reviewed in the present work. The compressive strength of the replacement concrete is 30.45 N/mm2. The compressive strength is increased by 9.3 % when compared to the conventional concrete. The Split Tensile Strength of the replacement concrete is 2.55 N/mm2. The Split Tensile strength is increased by 11.8 % when compared to the conventional concrete and the flexural strength of the replacement concrete is 8.45 N/mm2. The flexural strength strength is increased by 3 % when compared to the conventional concrete. Its utilization is cost effective and eco-friendly.

The influence of nano clay content on the strength of cement concrete

In order to clearly study the influence of nano clay content on the strength of cement concrete, superplasticiser (SP), naphthalene superplasticiser (FDN), polycarboxylic superplasticiser (PC) and aliphatic superplasticiser (SAF) are selected as test reagents, and nano clay with content of 0%, 0.5%, 1% and 1.5% and different kinds of superplasticisers are added to the water cement concrete mixture with water binder ratio of 0.36, The change of concrete cement paste mixed with nano clay is characterised by SEM test method from the micro scale, and the influence law of nano clay content on the compressive strength and flexural tensile strength of cement concrete is obtained. The results show that when the content of nano clay is 1.0%, the compressive strength of concrete reaches the maximum, and when the content of nano clay is 1.5%, the flexural tensile strength of concrete reaches the maximum.

Effects on Compressive and Tensile Strength of Concrete by Replacement of Natural Aggregates with various Percentages of Recycled Aggregates

Recycled aggregate concrete is required owing to environmental conservation and actual consumption of resources. In the construction industry, for the manufacturing of concrete the demand for replacement of ordinary aggregates by recycled aggregates has increased worldwide due to the large quantity of structure and destruction waste. The objectives of this research is to evaluate the effects of strength of concrete by replacing the normal crush with different percentages such as 25%, 50%, 75% and 100% of recycled aggregates. To conduct this study, a total of 120 cylinders (60 for compression and 60 for splitting cylinder test) are casted with mixing ratio of 1:1.9:3.8 and water to cement ratio of 0.59 while curing is carried out for 7, 14, 21 and 28 days. Numerous laboratory tests are performed like workability test, compression tests and splitting tensile strength tests, to check and compare effects of the recycled aggregate concrete with reference mix M1 (0%RA). The results illustrate that the workability of concrete decreases when the quantity of recycled aggregates are increased due to more water absorbing capacity. Further, it is also perceived that the compressive strength of concrete is decreased by 3.8%, 5.7%, 12.9%, and 15.8% respectively at 28 days of curing by substituting coarse aggregates with various percentages such as 25%, 50%, 75% and 100% of recycled aggregates as compared to reference concrete mix M1 (0% RA). Similarly, splitting tensile strength is also decreased when the quantity of recycled aggregates in ordinary concrete is increased. Moreover, this reduction in workability and strength of concrete is due to more water absorbing capacity of recycled aggregates. Hence it is concluded from the research that up to 25% replacement of natural aggregate with recycled aggregates, the recycled aggregate concrete is usually preferable to reduce the cost of construction as well as improve the environmental pollution issues. It is also observed that the splitting tensile strength of a concrete batch should vary between 9 – 11% of its respective compressive strength test results.

Evaluating the effects of agricultural wastes on concrete and composite mechanical properties: a review

Wastes generation and emission of greenhouse gases are the major concerns of the contemporary world. Concrete’s cements companies in the globe are producing up to 2.8 billion tons of cements annually. This contributed to the emission of anthropogenic substances into the atmosphere which destroys the ozone layers. The incessant disposal of these agricultural wastes has detrimental effect on the environmental and human health. Thus, utilizing these wastes as secondary resources in concrete is a reasonable consideration in sustainable waste management in the circular economy. The use of agricultural wastes in concrete production has been gaining attraction in recent years, however, their effectiveness and performance in concrete need evaluation. This study presents an overview of the effects of some agricultural wastes: Bagasse, Coconut shell, Cotton, Oil palm and Hemp fibers on concrete and composite’s mechanical properties. As reviewed, Sugar-Cane Bagasse Ash (SCBA) and Coconut Shell Ash (CSA) are rich in cementitious (pozzolanic) properties (SiO2, Fe2O3 and Al2O3) for cement production up to 70%. Sugar-cane bagasse and oil palm-fiber ashes improved concrete workability. SCBA and CSA highly increased the concrete compressive strengths. The concrete tensile strengths were increased up to 97% with the inclusion of cotton and bagasse ashes. The SCBA, hemp-fiber and treated oil palm - fiber ash increased the concrete and composite’s flexural strengths up to 11.3%, 26.2% and 50.7% respectively. In conclusion, the output of this review will supply full data of the research gaps yet to cover on the use of agro-wastes in concrete for future investigations

Relationship between compressive, split tensile and flexural strengths of ternary blended concrete

The paper presents the relationship among the split tensile, flexure and compressive strength of the ternary blended concrete (TBC) by incorporating the micro silica (MS) and ground granulated blast furnace slag (GGBS). Ordinary Portland cement (OPC) was replaced with GGBS by 20% to 50% by an increment of 10% in combination with each replacement level of MS (5%, 10% and 15%). A total of twelve ternary mixes and one control mix was prepared to determine the strength properties at the age of 28 days for w/b = 0.55. The experimental results are compared with the predicted values obtained from the existing relationships and noticed that the experimental values are within the range of predicted values.

Use of waste glass and demolished brick as coarse aggregate in production of sustainable concrete

Reduction, recycling, and repurposing of waste materials continue to be an important part because they protect natural resources from further depletion and reduce greenhouse gas emissions and lead to a more sustainable environment. In this research, we have identified whether it is possible to use recycled glass waste and demolished bricks as a substitute for natural coarse aggregate in conventional concrete mixes. Crushed waste glass aggregate (WGA) and demolished brick (DB) are used in the concrete mix to replace the coarse aggregate in the mix was varied from 0%, 25%, 50% and 100% by weight. Three, seven, and twenty-eight-days curing of concrete cubes with dimensions of 150x150x150mm and concrete cylinders with dimensions of 100 mm diameter by 200 mm were used to conduct mechanical tests. A total of 80 concrete cube specimens and 40 concrete cylinder specimens were made for investigating the effect of WGA and DB. It is revealed by the slump tests result that the workability of concrete decreases with increasing amounts of glass and demolished brick. When comparing the hardened concrete to the control concrete, the compressive and split tensile strengths of the hardened concrete decreased as the waste glass content in the hardened concrete increased. But the concrete mix containing 50% waste glass and 50% demolished brick outperformed the control concrete by a significant margin and could be used to produce standard concrete with only minor modifications as compared to control concrete.

Concrete with partial replacement of natural aggregate by PET aggregate—An exploratory study about the influence in the compressive strength

<abstract> <p>The expansion of cities contributed to the problems related to the accumulation of waste and lack of control over its management, there are still around 2400 dumps or uncontrolled landfills in Brazil. There is a large volume of polyethylene terephthalate (PET) improperly discarded. In turn, the construction industry has been looking for sustainable ways to produce concrete. This work deals with the analysis of the replacement of PET as a fine aggregate in concrete in the proportions of 5% and 15%. PET particles pass more than 75% in the 2.36 mm opening sieve and have more than 99% of their particle size retained in the 0.15 mm opening sieve. Concrete properties, compressive strength, tensile strength, water absorption and void ratio were evaluated and compared with the reference mix. In total, 45 specimens cast in concrete were used to complete the experiment. The results obtained showed that mixture compositions that incorporate PET as fine aggregates decrease compressive and tensile strength, increase water absorption and void index. The results obtained showed that blending compositions that incorporate PET as fine aggregates decrease compressive strength in about 14%, decrease tensile strength in about 7–11%, increased the void ratio in almost 20% and increased the water absorption in about 30%.</p> </abstract>

ЭКСПЕРИМЕНТАЛЬНО-ТЕОРЕТИЧЕСКОЕ ОБОСНОВАНИЕ МЕТОДА ОЦЕНКИ ТРЕЩИНОСТОЙКОСТИ И РАССТОЯНИЯ МЕЖДУ УСАДОЧНЫМИ ШВАМИ БЕТОННЫХ ОБЛИЦОВОК ВОДОХОЗЯЙСТВЕННЫХ КАНАЛОВ

Assessment of the susceptibility of concrete to cracking with subsequent changes in the volume and nature of pores, as well as capillary passages, deformation and strength properties of the material (especially tensile deformations and tensile strength) are the main indicators by which the resistance and durability of linings of water channels can be predicted. By regulating technological factors, it is possible to signifi cantly reduce the intensity of moisture shrinkage, which in turn makes it possible to achieve an increase in the operational reliability and durability of concrete linings. The main reason for the manifestation of shrinkage cracks in concrete is the excess, at a certain point in time, of non-manifested shrinkage deformations, as a result of which tensile stresses are formed in the material with constrained shrinkage, the ultimate tensile strength of concrete. Qualitative prediction of the potential resistance and durability of linings of water channels is possible when assessing the predisposition of concrete to cracking with subsequent changes in the volume, nature of pores and capillary passages, deformation and strength properties of the lining material.

Field thermal response test of energy pile foundation with cap under intermittent and continuous heating

Energy pile foundation has dual functions of bearing capacity and the utilization of shallow geothermal energy， the depth of foundation and operation modes have a certain impact on the heat transfer performance of the energy pile. Relying on the energy pile foundation with cap under the condition of 3.0 m buried depth， which belongs to the Hydraulic and Engineering Building of China Three Gorges University （Yichang city， Hubei province）， two series of field thermal response tests are conducted with 16-day test duration， the operation modes are 16 h heating-8 h self-cooling intermittent heating process （IH-16） and continuous 24 h heating process （CH-24）， respectively. The temperature， thermal induced strain of energy piles and cap are measured. The heat transfer efficiency values in the stable heating stage under CH-24 and IH-16 heating modes are about 5.32 kW and 5.38 kW， respectively. The neutral points of both CH-24 and IH-16 test conditions are appeared at 0.78 times the length of the pile from pile top， resulting in pile top displacements of 0.38 mm and 0.19 mm， the average temperature rise of the pile body is 8.9 ℃ and 4.7 ℃， respectively； and the thermal disturbance range is about 1.7 m. The maximum constraint stress of pile body under CH-24 test condition is <inline-formula><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mo>-</mml:mo><mml:mn mathvariant="normal">3.01</mml:mn></mml:math></inline-formula> MPa， which is 79% higher than that under IH-16 mode of <inline-formula><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M2"><mml:mo>-</mml:mo><mml:mn mathvariant="normal">1.68</mml:mn></mml:math></inline-formula> MPa. The IH-16 test produced an additional tensile stress of about 1.75 MPa at the position of the cap corresponding to the non-operating diagonal pile， which was about 73.2% of the C40 concrete tensile strength value. There were slight deformation differences in the cap under both two operating modes， which should be considered during design and operation. <fig fig-type="abstract-image" id="F1" orientation="portrait" position="float"><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="SP.J.1249-2022-39-1-75/126F38C5-A67D-4f70-9A76-3976C5B96D09-F001.jpg"/></fig>

Length Effect at Testing Splitting Tensile Strength of Concrete.

Tensile strength of concrete is the basic property when estimating the cracking resistance of the structure and when analysing fracture processes in concrete. The most common way of testing tensile strength is the Brazilian method. It has been noticed that the shape and size of specimens influence the tensile splitting strength. The experiments were performed to investigate the impact of cylinder’s length on tensile concrete strength received in the Brazilian method. During the experiment the tensile concrete strength was tested on two different sizes cylindrical specimens: 150 mm × 150 mm and 150 mm × 300 mm. Experiments were performed in two stages, with two types of maximum aggregate size: 16 mm and 22 mm. The software “Statistica” was used to perform the broad scale statistical analysis. When comparing test results for shorter and longer specimens, the increase of tensile splitting strength tested on shorter cylinders was observed (approximately 5%). However, when performing deeper statistical analysis, it has been found that the length effect was not sensitive to the strength of the cement matrix and the type of aggregate but was influenced by the aggregate size. Further experiments are needed in order to perform a multi-parameter statistical analysis of scale effect when testing the splitting tensile strength of concrete.

Study of the tensile and compressive strength of fiber-reinforced concrete

In this research, the effect of adding fibres from plastic bags waste to the Concrete mixed with local materials, its compressive strength and tensile strength were studied Percentages of cement weight (0.5-2%) while FP plastic fibres I used a reference mixture that is free of any additive and another that contains fibre w/c in the same proportions as the plastic fibres. The ratio of water to FPP polymeric cement For all mixtures are 0.50% and 0.55% and stabilized or weighed cement and large aggregates with Adjust or weigh the small aggregate to suit or weigh the added fibres. The results showed that with 1% with the first mixture and Fp, the compressive strength increased by 3.5%, corresponding to the percentage of fibres 2% of its resistance in the second Fp-free reference mixture is more than 3.9% at fibres. Concrete's tensile strength increases with the first mixture by 26% to 0%. Added from the weight of cement 1% to 1.5%, it increases, and on the other hand, it increases The tensile strength is very similar to that of polypropylene-reinforced concrete To improve the tensile properties of concrete. The density of concrete FP on fibre capacity Those containing plastic are lighter than those containing polypropylene Light concrete, but it is necessary to pay attention to the presence of voids and the possibility of separation for concrete. Production of fibre-reinforced concrete from industrial waste is beneficial Environmental disposal of industrial waste that has a harmful environmental impact and This waste is plastic waste in addition to its availability and cheapness.