Tensile Strength Of Concrete Research Articles

Experimental and numerical explorations on the optimized applications of SCDA in cracking concrete blocks

For effective applications of a soundless chemical demolition agent (SCDA) in fragmenting concrete blocks, experimental and numerical investigations were conducted. Firstly, the maximum expansion pressures under varying water/SCDA ratio, water temperature, and hole diameter were determined via experimental tests. Then, cracking experiments were performed on lab-scale concrete blocks with two predrilled holes by using strain gouge and acoustic emission tool. It was observed hole diameter exerts a primary control on the cracking process. The cracking process is generally divided into three stages, named micro-cracking stage, macro-cracking stage, and failure stage. Furthermore, two-dimensional realistic failure process analysis (RFPA2D) code was applied to reproduce the failure process of laboratory concrete blocks. The verified model was employed to simulate the cracking process of meter-scale concrete specimens with multi-holes of staggered and square arrangements. Empirical equations were formulated to correlate the cracking area with the hole diameter, spacing, and tensile strengths of concrete.

Digitally fabricated weak interfaces to reduce minimum reinforcement in concrete structures

AbstractCrack initiators in reinforced concrete structures can facilitate fulfilling the serviceability requirements. They can be used as a design parameter to diminish the minimum reinforcement for members subject to imposed deformation and exposed to the environment as they reduce the crack spacing and width when arranged close enough. While crack initiators in conventional concrete construction are cumbersome to provide (e.g., by construction joints or taperings), they are inherent to layered extrusion processes with digital fabrication technologies: the tensile strength is typically reduced locally in interfaces between layers. Rather than trying to avoid these weak interfaces, this paper discusses the potential of taking advantage of them to act as crack initiators reducing the minimum reinforcement content. A tension chord‐based model is developed to (i) account for the local strength reduction and (ii) predict the effect of weak interfaces on the expected crack spacing and width. As a key finding, the model predicts a reduction of the required minimum reinforcement ratio proportional to the locally decreased concrete tensile strength for a specified maximum crack width requirement under imposed deformations. An experimental campaign on five layered and three reference tension ties confirmed the clearly positive impact of weak interfaces on crack spacings and widths.

Performance evaluation of sugar cane bagasse ash on the strength of concrete: A sustainable approach

Cement is the most sought material in the world next to water. The manufacturing and utilization of cement is increasing rapidly leading to global warming due to release of CO2. In this research, it is intended to partially substitute the cement with agro-based byproducts i.e. bagasse ash (SCBA) as supplementary cementitious materials (SCM). Meanwhile, effect of SCBA (added at various proportions i.e. 5–30 %) on compressive and tensile strengths of concrete was investigated. Furthermore, SCBA was characterized for SEM, EDX, and XRD analysis to examine the surface morphology and physio-chemical characteristics. From results, EDX analysis indicated that the SCBA was primarily made of oxygen (O) ∼ 51.85 % and silica (Si) ∼ 45.67 % while, XRD analysis, showed the presence of SiO2 in SCBA. Slump value of SCBA blended concrete increased with increase in % of bagasse ash by up to 15 % increment. The compressive and split tensile strength values indicated 15 % replacement of SCBA with cement has performed better than other mixes.

Destructive and nondestructive tests formulation for concrete containing polyolefin fibers

Abstract Polyolefin fiber is a new type of fiber that was used in concrete to improve some of the poor properties of concrete including; tensile strength, ductility, and fracture energy. In this research, the contribution of Polyolefin fiber in improving the properties of hardened concrete was examined by adding polyolefin fibers to mix with different fiber content. The polypropylene fibers were added as a ratio of 0.5, 0.75, 1.0, 1.5, and 2% of concrete volume. Destructive and non-destructive tests were carried out: slump, compression, splitting, and bending, Schmidt Hammer, and ultrasonic pulse velocity tests. The results showed that, as the polyolefin fiber content increases, the workability of concrete reduces dramatically. The experimental findings demonstrate that the concrete tensile strength and ductility were improved by a small improvement in overall compressive strength. The results show that the compressive strength increased gradually with the increase in fiber content of up to 1.5%, and then, the compressive strength starts to decrease. However, the tensile strength increases continuously with the fiber content increasing. A good relationship was obtained between the destructive and nondestructive tests.

A Study on Strength Characteristics of Concrete by Addition of Basalt Fiber

Concrete is one of the oldest and most widely used building materials in the world, mostly because it is inexpensive and readily available. In all areas of contemporary construction, concrete has become a key component of structures. It is challenging to name another building material that is as versatile as concrete. When strength, durability, impermeability, fire resistance, and absorption resistance are needed, concrete is the ideal material to use. This study's main goal is to compare plain M30 grade concrete to basalt fiber concrete in terms of compressive, flexural, and splitting tensile strength. Basalt fiber is a substance created from the incredibly tiny basalt fibers that naturally occur in volcanic rocks that are the result of frozen lava. In the aerospace and automobile industries, it is utilized as a fire-resistant textile. Fibers are typically added to concrete to strengthen its structural stability. Due to its remarkable qualities, such as resistance to corrosion and low thermal conductivity, basalt fiber is currently among the fibers that is gaining more prominence. Additionally, it increases the concrete's toughness, flexural strength, and tensile strength. Important concrete constructions like nuclear power stations, roads, and bridges can employ it to prolong their lifespan. The variable factors taken into account in this study were M30 grade concrete cubes, cylinders, and beams, which were cast and cured in portable water for 28 days. The cubes' dimensions were 150 x 150 x 150 mm, the cylinders' dimensions were 150 mm (dia) x 300 mm (depth), and the beams' dimensions were 500 x 100 x 100 mm. Then, at 7, 14, and 28 days, the specimens were examined for split tensile strength, flexural strength, and compression strength using ordinary concrete with and without basalt fiber.

A double-cylinder model for bond analysis of deformed bars with eccentric concrete confinement

Bonding between deformed bar and concrete is critical for the load capacity of reinforced concrete structure. In practical engineering, the deformed bar is always eccentrically embedded in a concrete member instead of concentrically installed in it. In this paper, a double-cylinder model, which considers the additional concrete confinement outside the conventional cylinder of concentric embedment case as an extension of cylinder diameter, is first proposed to model overall concrete confinement effect on the deformed bar for the eccentric embedment case. Thereafter, combining the eccentric concrete confinement with other main influencing factors on the bond, such as friction coefficient, rib height and rib spacing, the ultimate bond strength is predicted for the concrete splitting failure mode. By comparing with the prediction bond strengths and experimental results from previous tests, a series of confinement adjustment factors based on the concentric cases are confirmed for various eccentric situations. As a result, a formula of the concrete confinement transition between the eccentric and concentric cases is obtained based on the least square method. Besides, parametric studies are conducted to study the effects of cover thickness, reinforcing bar diameter, concrete tensile strength on the bond strength between deformed bar and concrete.

I Investigating the compressive and tensile strength of concrete containing recycled aggregate with polypropylene fibers

I Investigating the compressive and tensile strength of concrete containing recycled aggregate with polypropylene fibers

A Comprehensive Review of Incorporating Steel Fibers of Waste Tires in Cement Composites and Its Applications.

Accumulating vast amounts of pollutants drives modern civilization toward sustainable development. Construction waste is one of the prominent issues impeding progress toward net-zero. Pollutants must be utilized in constructing civil engineering structures for a green ecosystem. On the other hand, large-scale production of industrial steel fibers (ISFs) causes significant damage to the goal of a sustainable environment. Recycled steel fibers (RSFs) from waste tires have been suggested to replace ISFs. This research critically examines RSF's application in the mechanical properties' improvement of concrete and mortar. A statistical analysis of dimensional parameters of RSFs, their properties, and their use in manufacturing various cement-based composites are given. Furthermore, comparative assessments are carried out among the improvements in compressive, split tensile, and flexural strengths of plain and RSF-incorporated concrete and mortar. In addition, the optimum contents of RSF for each strength property are also discussed. The influence of RSFs parameters on various strength properties of concrete and mortars is discussed. The possible applications of RSF for various civil engineering structures are reviewed. The limitations and errors noticed in previous review papers are also outlined. It is found that the maximum enhancement in compressive strength (CS), split tensile strength (STS), and flexure strength (FS) are 78%, 149%, and 157%, respectively, with the addition of RSF into concrete. RSF increased cement mortars' CS, STS, and FS by 46%, 50.6%, and 69%, respectively. The current study encourages the building sector to use RSFs for sustainable concrete.

Damage evolution of concrete under tensile load using discrete element modeling

The objective of this study is to investigate the damage evolution process in the flattened Brazilian test of concrete, and assess the effect of the maximum aggregate size on the tensile strength of concrete using the discrete element method considering the heterogeneity of concrete. Random irregular coarse aggregates were generated in each gradation according to the theoretical content. Based on this, a series of discrete element numerical models of flattened Brazilian disks with aggregates of different gradations were established, including 5–10, 5–16, and 5–20 mm, and numerical simulations of flattened Brazilian tests were conducted. Before the peak load, the compressive force was concentrated near the flat loading ends, which can be considered as the driving force for the initiation of shear microcracks, and the tensile force distributed away from the loading ends induced the appearance of tensile microcracks in the mortar and the interface transition zones (ITZs). Tortuous macroscopic cracks formed owing to the accumulation of tensile microcracks at the center of the specimen when the peak load was reached. After the peak load, secondary cracks initiated and extended gradually, and shear failure began to occur in the mortar and the ITZs owing to the redistribution of the compressive force. The failure mechanism was correlated with the displacement trends of the particles. Tensile microcracks could be associated with the tensile displacement trend of the particles. Shear and tensile microcracks co-existed in the zones where the particles moved in a mixed-mode displacement trend. The tensile strength of the concrete decreased slightly with an increase in the maximum aggregate size in the flattened Brazilian tests, and the tensile strength of the concrete was overestimated by the flattened Brazilian tests.

Mechanical Performance and Durability of Date Palm Fibers Repair Mortar

Background: Concrete is the most widely used material in the world after water. However, concrete could be damaged under aggressive environments and many concrete structures require repair and frequent maintenance. Readymade mortars with and without synthetic fibers such as polypropylene and acrylic are often used as repair mortars. The partial replacement of cement by supplementary cementitious materials and the use of alternative fibers such as natural and agro-waste fibers could reduce the environmental impact of readymade mortars. Methods: This paper presents a comparative study between the performance of laboratory made and ready-made repair mortars. The laboratory repair mortars were based on date palm fibers and local mineral additions (slag and natural pozzolan). The volume ratio of date palm fibers addition was 0.75% and mineral additions content were fixed at 15% as cement replacement. Compressive strength, flexural strength, shrinkage and the bond strength by slant shear test and tensile strength of concrete by the pull-off method were investigated. The durability of the mortar was evaluated by water capillary absorption. Results: The results indicated that the addition of natural fibers and the substitution of cement by 15% of mineral additions improves the flexural strength but reduces the compressive strength of the fiber-reinforced repair mortar. The lowest values of total shrinkage, water capillary absorption and sorptivity were observed for repair mortars based on acrylic fibers compared to repair mortars with natural vegetables fibers. Conclusion: The mechanical and durability performances of laboratory made repair mortars were comparable to those of readymade mortars.

Analisis Pengaruh Pencampuran Serat Karbon Terhadap Kekuatan Beton dalam Menahan Beban Desak, Beban Tarik dan Beban Lentur

This study aims to overcome the weaknesses of concrete, namely the nature of concrete which is classified as brittle so that it has a negative impact on the concrete in resisting bending and splitting, while it also has a high density (2.3-2.4 T / m3). So that this research will add fiber to concrete in the form of carbon fiber, carbon fiber that is very strong and is known to be very light is expected to increase the tensile strength and flexural concrete significantly and without adding weight to itself. Calculation of concrete mix planning using normal concrete mixture calculations (SNI 03-2834-2000) with a planned compressive strength is 20 MPa, carbon fiber mixed in the form of fiber pieces with variations in fiber length, namely 5mm, 10mm and 15mm with a composition of 0.4% of normal concrete weight. Tests are carried out when the concrete sample is 28 days old. While waiting for the concrete age to reach 28 days, the concrete is treated in the form of soaking in water. And the results of this study indicate a significant increase in concrete compressive strength of 45.32%; concrete tensile strength of 73.24%; and the flexural strength of the concrete was 78.83% but it also managed to maintain the density of concrete at 2.3 T / m3. For further discussion and more detail will be presented in the following research report.

A Finite Element Analysis of Tunnel Lining Demolition by Blasting for Subway Tunnel Expansion

In this paper, a practical project of subway tunnel lining demolition via blasting for the construction of a subway station under the action of the blasting load and the weight of collapsed rock mass was proposed. The tunnel overbreak and underbreak quality, the failure mechanism of the tunnel lining structure, the particle peak velocity (PPV), and the stress evolution law of the surrounding rock caused by tunnel blasting were researched using LS-DYNA. Firstly, the results show that the blasting parameters presented in this paper can maintain the cross-section of a smooth outline of tunnel excavation and the overbreak or underbreak quality in control. Secondly, the tensile stress in the existing tunnel lining caused by blasting exceeded the concrete tensile strength, and the radius of the burst fracture was 0.86 m, which is greater than the thickness of the tunnel lining (0.7 m). Thirdly, the blasting stress in the surrounding rock peaked within 0.1 × 10−3 s after the blasting, and failure of the surrounding rock occurred. Moreover, the relationship between the PPV and the distance from the blasting center shows that the blasting parameters used in this paper can effectively control the PPV. Therefore, this study reveals that the expansion of existing tunnels into subway stations using this method can improve the efficiency of construction.

Mechanical properties and degradation mechanism of LNG containment concrete material under cryogenic conditions

• Compressive strength and tensile strength of the concretes at cryogenic temperature were studied. • The damage degree of the concretes after cryogenic freezing-thawing cycles was investigated. • The mechanism of mechanical properties of the concretes at cryogenic temperatures was analyzed. • The degradation mechanism of damaged concrete under freezing-thawing cycles was discussed. • Application of the HCC for on all-concrete LNG storage tanks is appropriate. The mechanical properties and deterioration of concrete under cryogenic conditions are unclear. Here, high-strength and cryogenic temperature-resistant concrete (HCC) was developed for Liquefied natural gas (LNG) inner tank applications. Influences including compressive and tensile concrete strength under different temperatures (25 °C ∼ -165 °C) and freezing-thawing cycles were investigated. The results showed that lower temperatures result in higher compressive strengths, the tensile strength increases and then decreases, and the greatest increase in strength occurs at −45 °C. The tensile strength of HCC and C60 concrete decreases below −105 °C and −45 °C, respectively; more freezing-thawing cycles result in greater mechanical property degradation. Furthermore, compared to C60 concrete, HCC has a significantly lower rate of strength loss. The mechanical property mechanisms at different cryogenic temperatures and deterioration due to the freezing-thawing cycles were investigated by differential scanning calorimetry (DSC), nuclear magnetic resonance (NMR) and scanning electron microscopy (SEM). HCC is an ideal material for LNG inner tanks.

Effect of the Mortar Volume Ratio on the Mechanical Behavior of Class CI Fly Ash-Based Geopolymer Concrete

This research described the effect of the mortar volume ratio on the mechanical behavior of Class CI fly ash-based geopolymer concrete. The absolute volume ratio parameters were designed to determine the effects on the mechanical properties of the geopolymer concrete. The volume ratio of the mortar to coarse aggregate voids (Rc) was increased by 0.25 increments, from 1 to 1.75, using constant parameters of 10 M NaOH at a ratio of Na2SiO3to NaOH (R). Furthermore, the alkaline to fly ash ratio (A) of 0.35 and the volume ratio of paste to fine aggregate voids (Rm) of 1.5 were based on geopolymer paste and mortar investigations previously published. The test results showed that 1) the Rc ratio influences the workability and compressive strength of geopolymer concrete; 2) the increase in the Rc ratio by 1.75 is not linear with the rise in compressive strength but produces better mechanical properties; 3) it does not affect the tensile strength of both geopolymer and OPC concretes; 4) the lower the Rc ratio, the higher the flexural strength; 5) the Rc ratio does not affect the OPC concrete and GC tensile strength; 6) the bond stress in geopolymer concrete with an Rc ratio of 1.75 is higher than in OPC concrete; and 7) Rc ratio does not affect the early strength of geopolymer concrete. The geopolymer concrete experienced an increase in compressive strength after 28 days, while the OPC concrete remained flat. The results will help develop an optimal mix design of Class CI fly ash with moderate calcium oxide in the production of geopolymer concrete. This will improve the future applications of using this process in new binding materials. Doi: 10.28991/CEJ-2022-08-09-012 Full Text: PDF

Effect of biochemical attack on the mechanical performance of used concrete sewer pipes

The structural response and failure mechanisms of 35 used concrete sewer pipes are investigated by means of a combined experimental–numerical approach, whereby specific attention focuses on determining the effect by biochemical attack. Accordingly, the degree of degradation of the inner and outer surfaces of the pipes is carefully analysed by visual inspection, and subsequently categorized in 6 different surface condition classes. The type and degree of biochemical attack are determined by respectively performing X-ray diffraction analyses and phenolphthalein tests. The sewer pipes, which vary in age, size and geometry, are subjected to biaxial loading conditions in a full-scale test set-up. The experiments show that the material degradation of relatively old sewer pipes can be considerable, and for a large part may be attributed to the process of biogenic sulphide corrosion. This process typically induces a weak, corroded layer at the inside of the pipe, which is characterized by the appearance of exposed granulates and porous mortar between the granulates. The experimental failure responses of the used sewer pipes are compared against numerical results obtained from detailed Finite Element Method (FEM) simulations. The failure response of each sewer pipe type is well predicted by the FEM model if the negligible mechanical properties of the biogenic sulphide corrosion layer at the inside of the pipe are accounted for in the simulations. The relatively low concrete tensile strength of old sewer pipes and the reduced effective wall thickness due to biogenic sulphide corrosion cause that the ultimate bearing strength and structural stiffness of these pipes may be more than a factor of two lower than those of completely new sewer pipes. The results of the present work provide a scientific basis for the decision-making process on sewer rehabilitation and replacement, in particular by revealing and quantifying the influence on the structural bearing strength by biogenic sulphide corrosion. • Structural response and failure mechanisms of 35 used concrete sewer pipes are investigated via a combined experimental–numerical approach. • Effect of biochemical attack on bearing strength is quantified. • Mechanical collapse of sewer pipes is characterized by the development of 4 failure cracks. • Results provide a scientific basis for decision-making process on sewer rehabilitation and replacement.

Study of strength related resources of hybrid fiber reinforced concrete (HFRC) and energy absorption capacity (EAC)

Cement Concrete is the most widely used building material for all civil engineering applications due to its well-known benefits. However, its limited tensile strength is a concern. It understands, clearly that fiber reinforcement is finest and adaptable way to improve the post cracking tensile strength and energy absorption capacity during under diagonal split tension and under axial compression. In the present investigation study steel and polyester fibers remained in various volume fractions. Control concrete mixture was made with Ordinary Portland Cement (OPC), fine and coarse aggregate along with flyash, silicafume and high range water reducing admixtures. With no change in the constituents of concrete steel fiber reinforced concrete specimens were made with hooked end steel fibers of aspect ratio 80 vol fraction being 1.0%, 1.25% and 1.5%. Similarly, polyester fiber reinforced concrete specimens were made with 12 mm synthetic polyester fibers at 3%, 4% and 5% volume fraction. All the specimens were cured for 28 days and the fresh concrete was tested to ensure the workability by conducting slump test. In comparison to the control concrete, all the fiber reinforced specimens containing single and hybrid combinations exhibited significant improvement in tensile and flexural strength properties. Uni axial compression loading condition was adopted for all the 100 mm × 200 mm cylindrical specimens. In both the loading conditions load distortion curves stood plotted and the areas under the curves were calculated as a measure of energy absorption capacity. Compressive strength as compared to control concrete was enhanced due to polyester fiber, steel fiber, in that order. Split tensile strength has been significantly improved due to polyester hybridisation with steel fibers. Hence the hybridisation has improved the necessary belongings of concrete like split tensile strength and toughness significantly.

Investigation of physical, strength, and ductility characteristics of concrete reinforced with banana (Musaceae) stem fiber

Natural fibers derived from plant wastes possess a negligible carbon footprint and a high tensile strength. Therefore, researchers are focusing on the technical evaluation of cementitious materials with bio-based fibers. The stems of the banana plant consist of high-quality textile-grade fiber bundles possessing high tensile strength and toughness. Owing to these characteristics banana stem fiber (BSF) can be used as a reinforcement for plain concrete. Therefore, this study is devoted to the evaluation of the properties of concrete with various concentrations of BSF. The performance of BSF in concrete was also compared with artificial polypropylene fiber (PPF) at the same volumes of fibers (i.e., 0.25, 0.5, and 1%). The results revealed that 0.25% and 0.5% volumes of BSF were highly useful to the tensile and flexural strength of concrete. However, residual compressive and tensile strength improved with the increasing volume of BSF. At 0.5% BSF, compressive strength, splitting tensile strength, and flexural strength of concrete experienced net improvements of 6%, 40%, and 10%, respectively. The mechanical performance of BSF was comparable to that of the artificial PPF. Electrical resistivity increased with the rising fiber volume. Whereas, ultrasonic pulse velocity gradually decreased with rising fiber content and reduced by 7% at 1% BSF. Scanning electron microscopic (SEM) analysis revealed a negligible shrinkage of BSF filaments in the cementitious matrix. This behavior was contrary to that observed with other natural fibers.

Predicting Compressive and Splitting Tensile Strengths of Silica Fume Concrete Using M5P Model Tree Algorithm.

Compressive strength (CS) and splitting tensile strength (STS) are paramount parameters in the design of reinforced concrete structures and are required by pertinent standard provisions. Robust prediction models for these properties can save time and cost by reducing the number of laboratory trial batches and experiments needed to generate suitable design data. Silica fume (SF) is often used in concrete owing to its substantial enhancements of the engineering properties of concrete and its environmental benefits. In the present study, the M5P model tree algorithm was used to develop models for the prediction of the CS and STS of concrete incorporating SF. Accordingly, large databases comprising 796 data points for CS and 156 data records for STS were compiled from peer-reviewed published literature. The predictions of the M5P models were compared with linear regression analysis and gene expression programming. Different statistical metrics, including the coefficient of determination, correlation coefficient, root mean squared error, mean absolute error, relative squared error, and discrepancy ratio, were deployed to appraise the performance of the developed models. Moreover, parametric analysis was carried out to investigate the influence of different input parameters, such as the SF content, water-to-binder ratio, and age of the specimen, on the CS and STS. The trained models offer a rapid and accurate tool that can assist the designer in the effective proportioning of silica fume concrete.

Application of Machine Learning Techniques for Predicting Compressive, Splitting Tensile, and Flexural Strengths of Concrete with Metakaolin.

The mechanical properties of concrete are the important parameters in a design code. The amount of laboratory trial batches and experiments required to produce useful design data can be decreased by using robust prediction models for the mechanical properties of concrete, which can save time and money. Portland cement is frequently substituted with metakaolin (MK) because of its technical and environmental advantages. In this study, three mechanical properties of concrete with MK, i.e., compressive strength (), splitting tensile strength (), and flexural strength (FS) were modelled by using four machine learning (ML) techniques: gene expression programming (GEP), artificial neural network (ANN), M5P model tree algorithm, and random forest (RF). For this purpose, a comprehensive database containing detail of concrete mixture proportions and values of , , and FS at different ages was gathered from peer-reviewed published documents. Various statistical metrics were used to compare the predictive and generalization capability of the ML techniques. The comparative study of ML techniques revealed that RF has better predictive and generalization capability as compared with GEP, ANN, and M5P model tree algorithm. Moreover, the sensitivity and parametric analysis (PA) was carried out. The PA showed that the most suitable proportions of MK as partial cement replacement were 10% for FS and 15% for both and .

Mechanical properties and pore structure of basalt–polypropylene fiber fly ash concrete exposed to high temperatures

The deterioration of concrete structures after fires has been widely concerned. The purpose of this paper is to study the influence of high temperature on the mechanical properties and pore structure of hybrid basalt–polypropylene fiber fly ash concrete. The mechanical properties and damage amount of hybrid basalt–polypropylene fiber concrete with different content of fly ash (FA0, FA10, FA20, and FA30) at different temperatures (20, 200, 400, 600, and 800 °C) were investigated. Additionally, the pore structure test was conducted, and the relationship between pore structure parameters and macromechanical properties was analyzed. The microstructure at different temperatures was observed by scanning electron microscopy (SEM) images. Finally, the main pore structure parameters affecting compressive strength, tensile strength, and damage amount were determined by using the gray correlation entropy method. From the results, after natural cooling at 200 °C, the compressive and tensile strength of concrete was slightly higher than that at room temperature, and it should be noticed that the FA10 concrete specimen showed better mechanical properties at different temperatures compared with other specimens. The increase in air content, spacing factor, and average chord length weakened the strength of concrete, while the increase in specific surface area had a positive impact on the compressive and tensile strength of concrete. The microstructure of FA10 at high temperature was better than that of FA0. The specific surface area was the main factor affecting the compressive and tensile strength, while the main factor affecting the damage amount was the spacing factor, followed by the average chord length.