Red Brick Waste Research Articles

Co-valorisation of local materials tuff and red brick waste mixture for use in road construction

Co-valorisation of local materials tuff and red brick waste mixture for use in road construction

Early-age structural build-up and rheological assessment of alkali-activated slag-red clay brick waste pastes: Influence of silica modulus and precursors proportions

Sustainability plays a crucial role in the current context of the cement industry, and alkali-activated materials (AAMs) are emerging as eco-efficient alternative binders. On the other hand, the massive generation of red brick waste worldwide and its lack of a defined destination emphasizes this material as an alternative precursor that has been insufficiently explored in the literature. Based on this context, the present study aims to investigate the structural build-up, reaction kinetics, and rheological properties of alkali-activated pastes based on blast furnace slag (BFS) and red clay brick waste (RBCW). Fresh properties such as structural build-up, rheology, and reaction kinetics are lacking in the literature on RCBW-based AAMs, highlighting these properties as a research gap to be filled and discussed in depth in this paper. The flow sweep test was performed, linked to yield stress and viscosity properties. The structural build-up was evaluated by strain sweep and small amplitude oscillatory shear (SAOS) tests based on viscoelastic parameters: storage modulus, loss modulus, and phase angle. Isothermal calorimetry and in-situ FTIR were also conducted to complement the analysis and provide insight into the reaction kinetics, chemical structure, and product formation. Higher silica modulus (Ms) resulted in a lower structural build-up rate and a delayed reaction. Higher content of RCBW resulted in a delayed structuration process, which was linked to a delay in the precipitation of aluminosilicate gels. Early increase in the structural build-up in 25 % and 50 % RCBW blends (Ms = 1.0) is associated with the early formation of a well-percolated network.

Mixing design and performance of porous asphalt mixtures containing solid waste

The process of urbanization generates substantial amounts of solid waste materials, including glass, red brick, concrete, and ceramic tile. Effective treatment methods for these waste materials are currently lacking, resulting in significant land wastage and environmental pollution. Utilizing these waste materials in the construction of asphalt pavements presents a viable solution for their high-quality and large-scale utilization. In this study, the properties of commonly produced urban solid waste materials, including glass, red brick, concrete, and ceramic tile, were investigated for their suitability as limestone porous asphalt mixtures. The physical and chemical properties of the coarse aggregate were examined using four groups of preliminary tests, including leakage analysis, scattering, rutting, and freeze-thaw splitting tests. The results revealed that the apparent relative density varied for different particle sizes within the range of 2.36–4.75 mm, 4.75–9.5 mm, 9.5–16 mm, and 13.2–16 mm. However, the dynamic stability of the glass specimen was only 740 times/mm, which falls significantly below the technical requirement of 1500 times/mm. Additionally, the high-temperature stability of the glass specimen was deemed unsatisfactory. The red brick test piece exhibited inadequate water stability due to its high-water absorption rate. Therefore, reducing the amount of waste glass and minimizing the incorporation of waste red brick are recommended. The findings of this study contribute to the expansion of application methods and techniques for urban solid waste, improving the utilization rate of solid waste resources. Furthermore, the study sheds light on the changes in the performance of solid waste aggregates mixed with porous asphalt mixtures, providing valuable insights for road engineering endeavors.

High‐performance geopolymer from brick wastes and metakaolin: Alkali treatment optimization, phase transformation, and property analysis

AbstractThis study presents a cost‐effective and eco‐friendly method to produce aluminosilicate materials using red brick waste (RBW) and metakaolin (MK) as silica and alumina precursors. RBW was subjected to alkaline fusion to increase its dissolution for geopolymerization reaction. Response surface methodology was used to investigate the effect of NaOH concentration and fusion temperature on the leaching of silica and alumina from RBW. The microstructure of the alkali‐fused RBW was analyzed using x‐ray diffraction and Fourier‐transform infrared spectroscopy. Response surface methodology confirmed and revealed that higher NaOH concentration (14 M) and a temperature of 660°C favored solubilized phase development, resulting in 85% and 50% leached silica and alumina, respectively. These optimized parameters were then employed to prepare geopolymer materials with different proportions of alkali‐fused RBW and MK, using NaOH and Na2SiO3 as the alkaline solution. The elaborated geopolymer binders were characterized using various techniques such as x‐ray diffraction (DRX), Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermal conductivity (λ), and fire resistance. The results showed that geopolymers containing 30 wt.% of alkali‐fused RBW exerted good mechanical and thermal insulation properties compared to conventional cement materials. However, excessive RBW addition causes negative effects. In addition, it was found that the blended geopolymers exhibited an increase in heat release rate (HRR), resulting in reduced fire resistance due to the presence of unreacted NaOH. Overall, these findings confirmed the potential sustainable use of RBW to partially replace MK in geopolymer as a material for building construction.

Synergistic valorization of rice straw and red brick demolition in development performance of lightweight cement mortars

This work deals with upgrading the undesirable agro- and industrial wastes, such as rice straw (RS), red brick demolition (RBP), and polystyrene foam (PSF), for construction purposes, as an excellent strategy to protect the environment. In this respect, the RS and its pulp fibers are modified by PSF, followed by their incorporating individually or in hybrid with RBP, in cement mortar formulation. As a substitute for fine aggregates. Six rice straw pulps used in this study were prepared from alkali, neutral, acidic, and kraft pulping agents. The effective performance of this investigated route is assessed from the mechanical properties, density, moisture resistance (thickness swelling and water absorption), measurements of the resulting mortar composites, as well as how the investigated treatment effects on behavior of RS fibers. The finding results show that the modified RS fibers, especially those results from KOH–NH4OH and neutral RS-pulping reagents, in hybrid with red brick waste provide motors with better mechanical and water resistance properties. These treated fibers have a synergistic role for including the RBP in mortar formulation to 30 %. The produced mortar has compressive strength 6.2 MPa and flexural strength 4.4 MPa, which is convenient to apply as load-bearing wall. Moreover, they provide improvement in resistance to thickness swelling and water absorption after 24-h exposure to water. The reduction in thickness swelling and water resistance reached 36.7 and 52.8 %, respectively. From the TGA measurements and SEM, it is interesting to notice that the investigated route accepts the RS fibers thermal stability and hydrophobic surface character.

Alkaline activation of brick waste with partial addition of ordinary Portland cement (OPC) for reducing brick industry pollution and developing a feasible and competitive construction material

This study shows an alkaline activated cement (AAC), also known as geopolymer, made from red brick waste with partial addition of Ordinary Portland Cement (OPC). This is a sustainable material since incorporates waste from the brick industry to make cements, therefore increasing the materials circularity and this reducing pollution. The material was cured at room temperature. The brick residue was activated with sodium hydroxide and sodium silicate in aqueous solution to form the hybrid cement. Several mixtures were made with different amounts of waste and proportions of alkaline activator. The mechanical properties of the materials were studied to determine their feasibility to be used in the construction sector. Three contents of OPC were used: 10, 20, and 30 wt%, which were added to improve the mechanical behavior and post-curing time. The activated hybrid cement was analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), compression, and flexural tests. The main results show that the addition of OPC to the brick derived AAC produces an increased compressive strength of 106 MPa when 30 wt% OPC was added, a very significant result since the control sample found was 33 MPa in compression strength, an improvement for more than 3 times. The data were corroborated by statistical analysis.

Green recycling of red brick waste into aerogel panels for thermal insulation in buildings

Green recycling of red brick waste into aerogel panels for thermal insulation in buildings

Utilization of oyster shell nano-hydroxyapatite modified red-brick waste as an environmentally friendly composite filler for Cd(II) and Cr(VI) adsorption: Preparation, property and mechanism

The ongoing process of urbanization in China has led to a growing concern regarding environmental contamination caused by the significant accumulation of construction demolition trash. This study employs the water thermal method to synthesize hydroxyapatite using natural waste oyster shells as the primary raw material. This study explores the use of synthesized hydroxyapatite (O-HA) on building waste red-brick fragments (RBF) for removing cadmium (Cd(II)) and chromium (Cr(VI)) from water. The RBF fillers, both before and after modification, underwent comprehensive characterization using various techniques, including automated analysis of specific surface area and porosity (BET), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). In the sixth cycle of purification experiments, the average removal rate of Cd(II) by O-HA-modified red-bricks (O-HA/RBF) could still reach 88.18 %, which was about 20.00 % higher than that of the RBF. However, the removal of Cr(VI) by O-HA/RBF was unsatisfactory at 5.33 %. The adsorption mechanisms of Cd(II) and Cr(VI) were explored by isothermal adsorption tests and adsorption kinetic tests. According to the mechanism analysis, physical adsorption and chemical adsorption were the main reasons for Cd(II) adsorption by O-HA/RBF. This involves ion exchange and surface complexation between calcium ions in O-HA and Cd(II), forming a low-solubility precipitate for effective removal. However, for Cr(VI), physisorption predominantly governs O-HA/RBF, elucidating the limited efficacy in Cr(VI) removal. The cost analysis showed that using O-HA/RBF as filler reduced overall expenses in wetland development, offering promising prospects for engineering applications.

Strength development and microstructure evaluation of cement mortar incorporating various waste red brick powder

This research aims to evaluate the strength development and microstructure of a green mortar produced from waste red brick powder (WRP) as a partial cement replacement. The mortar samples were prepared with various WRP content of 0%, 10%, 20%, 30%, and 40% of total binder weight, and the w/b was fixed at 0.4. The fresh properties were checked by flowability and fresh unit weight. While the compressive strength was conducted up to 28 days. The mortar samples exhibited a reduction in flowability and unit weight with increasing WRP content. The incorporation of 10%-20% WRP improved the compressive strength of mortar samples at 28-day, while the compressive strength reduced with higher WRP content (30%-40%). The C-S-H/CaCO3 gel, Ca(OH)2 and ettringite were hydration products of WRP mortar samples. The incorporation with WRP significantly reduced the Ca(OH)2 content

Synthesis of PS/RB-Cs and its use in the treatment of water polluted with heavy metals

Polystyrene waste are non-biodegradable materials that causes harm to the environment. Red brick waste resulting from demolition and reconstruction are an obstacle to its disposal. To solve this problem and meet modern sustainability standards, this study utilized polystyrene (PS) foam and red brick construction waste to prepare composite materials (PS/RB-Cs) as a new efficient adsorbent. The PS/RB-Cs composite as an adsorbent was characterized using a UV–Vis Spectrophotometer, Energy Dispersive X-ray Spectroscopy (EDX), Scanning Electron Microscope (SEM), and transmission electron microscopy (TEM), which showed a clear spectrum shift after using PS/RB-Cs as an adsorbent. The PS/RB-Cs was characterized by a porous structure with higher surface area and high stability. The efficiency of the PS/RB-Cs in treating water contaminated with heavy metals such as cobalt and nickel was verified under different initial concentrations, temperatures, doses, pH, and contact times. The experimental qe values were consistent with the qe calculated values and were approximately 8 mg/g. The adsorption isotherm models showed that the adsorption results fit the Langmuir, Freundlich and Flory-Huggins isotherm models and that the process was favorable. By applying pseudo-first-order (PFO) and pseudo-second-order (PSO) kinetic models, the adsorption process was found to follow PSO. The findings of this research validated that the composite material that was prepared serves as a potent adsorbent for the treatment of water that has been polluted by heavy metals.

A literature review of the latest trends and perspectives regarding alkali-activated materials in terms of sustainable development

The purpose of the paper was to analyze trends in the formation of alkali-activated materials (AAMs) produced from alternative starting materials to blast furnace slags and fly ash. The research was reviewed on the basis of literature data from the past few years, which shows that the researchers are increasingly paying attention to the possibility of synthesis of AAM from such waste materials as industrial slags and ashes, concrete and demolition waste, red brick waste and glass waste. This is driven by the need to find competitive solutions to the commonly used blast furnace slags and fly ashes in the cement industry, which are also a source for obtaining traditional AAM. Analysis of material solutions has shown that these materials are being successfully used to produce new AAMs, with most of them being only a partial replacement for slags and fly ash. The article also points out that silicon- and aluminum-rich waste materials such as red mud, rice husks, and waste glass can be successfully used to activate AAMs materials, in place of typical activators in the form of sodium silicates or hydroxides, which in turn contributes to lowering the carbon footprint of AAMs. However, the future of this type of solution depends on several factors, the most important of which seems to be the understanding of the polymerization mechanisms of the more complex aluminosilicate systems and the achievement of reproducible physical and chemical parameters of AAM, resulting in strong and durable binders and, ultimately, construction materials made from them.

Strength Performance and Microstructures of Alkali-Activated Metakaolin and GGBFS-Based Mortars: Role of Waste Red Brick Powder Incorporation

Excessive use of natural resources and environmental concerns are key issues motivating the recycling of waste materials in the construction industry to minimize landfill problems. Free cement binders such alkali-activated binders have emerged as a prospective alternative to ordinary Portland cement, wherein diverse industrial, agriculture, and by-product waste materials have been converted as valuable spin-offs. Annually, tens of millions tons of red brick wastes are generated, which leads to several environmental problems. Thus, waste red brick powder (WRBP) was used as binder or a fine aggregate (silica sand) substitute to prepare some new types of alkali-activated mortars (AAMs). These mortars contained ground blast furnace slag (GGBFS) and metakaolin (MK) with various levels of WRBP (0, 15, 30, and 45%) as a substitute for silica sand. The prepared AAMs were cured at 300 °C, 600 °C, and ambient temperature. All the specimens were tested to determine the effects of various WRBP contents on the workability, strengths, and microstructures of the designed AAMs. The workability of the fresh AAMs was considerably dropped due to the incorporation of WRBP as binary binder or fine aggregate replacement. In addition, AAM containing 15% of WRBP as GGBFS and MK replacement displayed a significant improvement (by 30.7%) in the strength performance. However, the increasing content of WRBP to 30% and 45% significantly led to a decrease in compressive strength from 49.9 MPa to 44.7 and 34.2 MPa, respectively. Overall, the mortars’ strength was increased with the increase in WRBP contents from 0 to 45% as sand substitute. Conversely, the mortars strength was reduced with the increase in curing temperatures. The microstructure analyses of the studied mortars revealed an appreciable enhancement of the geopolymerization process, gels formulation, and surface morphology, leading to an improvement in their compressive and flexural strength characteristics. It was asserted that high-performance mortars with customized engineering properties can be designed via the inclusion of WRBP into alkali-activated MK-GGBFS mixes.

Mechanical properties and microstructure of ternary alkali activated system: Red brick waste, metakaolin and phosphogypsum

Nowadays, alkali activated materials are becoming more and more common due to sustainability benefits and relatively good mechanical properties. This study analyzes a three-component alkali-activated binder (AAB) system, which consists of two calcined aluminosilicate precursors (red brick waste and metakaolin waste), a calcium source (phosphogypsum) and alkali solution (sodium hydroxide). The alkali-activated binder composition consists of the main precursor, red brick waste, which is gradually substituted (20, 30, 40, 50, 60, 70, 80 and 100 wt%) by metakaolin waste. The activator of the aluminosilicate materials (NaOH) was dosed by keeping the ratio of sodium and aluminum in a range of 1.03 – 1.64. Alkali activated binders were investigated by using X-ray powder diffraction (XRD) and Fourier Transform Infrared (FT-IR) analysis for the evaluation of mineral composition, along with scanning electron microscopy (SEM) for the analysis of the microstructure. The compressive strength of the material was also determined. The results have shown that the use of different types of industrial waste materials (RBW, MKW and PG) are suitable to produce ternary AAB. The replacement level of red brick waste with metakaolin waste in the precursor had a significant influence on the compressive strength of AAB. The highest compressive strength (35.1 MPa after 28 days) was achieved by using the combination of 70% RBW and 30% MKW. In this case the compact microstructure developed, consisting of the amorphous sodium aluminosilicon hydrate gel and hydrosodalite as crystalline compound, had an influence on the compressive strength of the AAB.

Lightweight porous geopolymers from waste red brick precursor and synthetic foaming admixture

Geopolymers are associated with a high potential to replace traditional Portland cement. Up to now, research has been ongoing on alternative precursors with wide availability, low cost, and low environmental impact. Attention is paid to ashes, industrial by-products, and construction and demolition waste. Sophisticated materials with high porosity and improved physical or mechanical properties are developed to enhance the application of geopolymers. In this paper, the waste red brick is used as a precursor to produce highly porous geopolymers. Here, porous geopolymers on waste brick precursor and synthetic foaming agent were developed for the first time. Red waste brick was ground to powder particles and activated with NaOH solution. A porous structure was obtained by a pre-foaming technique where geopolymer slurry was mixed in the foams. Physical and mechanical properties were evaluated depending on mixture composition and foaming agent content. Porous geopolymers with densities from 240 to 1200 kg/m3 were obtained. The pore structure of obtained materials was characterized. Reduced density and characteristics of red clay precursor summarised in low compressive strength which was from 0.04 to 0.4 MPa.

Utilization study on red brick waste as novel reinforcing and economical filler for acrylonitrile butadiene rubber composite

Red brick waste (RBW) powder was used as a reinforcing filler for acrylonitrile butadiene rubber (NBR) for preparing eco-friendly composites. The main constituent of this waste is silica which is considered to be one of the traditional fillers used in the rubber industry. So it was worthwhile to get (RBW) in a suitable manner by using this waste as a filler for NBR. Physicomechanical properties were evaluated, including tensile strength, elongation at break, hardness shore A, and change in mechanical properties after thermal-oxidative aging for seven days at 90 °C. In addition, equilibrium swelling in toluene for prepared composites was also included. Moreover, cross-linking density was measured according to Flory Rehner's equation. From physicomechanical measurements, it is observed that the tensile strength and hardness (shore A) increased with increasing the waste filler content because of the red brick filler's stiffness. In contrast, the elongation at break and equilibrium swelling degree decreased with increasing the waste filler content. The morphology of the polymeric composites was monitored using a scanning electron microscope which reflects the uniform distribution of the filler inside the NBR matrix. The electrical and magnetic properties of NBR/RBW composites were evaluated. The electrical measurements revealed that the values of ε′ increase by increasing red brick waste while ε'' decreases by increasing filler content. The dc conductivity σdc values lie in the order of 10–11 S/cm. This finding recommends that such composites could be used for insulation and antistatic applications. In addition, the magnetic measurements show superparamagnetic behavior in NBR/RBW composites. Therefore, the obtained composites be used as electromagnetic composites based on electrical and magnetic measurements.Graphical

Pemanfaatan Limbah Serbuk Bata Merah Sebagai Bahan Stabilisasi Tanah Lempung Ekspansif

The swell-shrink behavior of expansive clay soil cause problems in the construction such as the occurrence of bumpy road, cracking and various other problems, therefore stabilization of the soil is needed to improve the behavior of the soil.Red brick is a building material that contains chemical compounds that can increase the compressive strength of a building. Red brick waste which is rarely used is then reused as a cement mixture.This study aims to determine the type and classification of soil in Cibingbin village, a village located in Cibaliung sub-district, Pandeglang district-Banten province, based on the USCS soil classification system, and to determine the value of unconfined compression test (qu) with the addition of red brick powder with variations the percentage additions were 0%, 5%, 10%, and 15% with curing times of 0, 7, 14, and 28 days.From the results of the study, it was found that the soil classification in Cibingbin village was classified as high plasticity organic clay (OH) according to the USCS classification system. The lowest qu value was obtained at 0 days of curing with the percentage of added ingredients 0%, 5%, 10%, 15% increasing the qu value was 1,316 kg/cm2, 1,655 kg/cm2, 2,242 kg/cm2; 2,607 kg/cm2, and the largest qu value was obtained at 14 days of curing with the percentage of added material 0%, 5%. , 10%, 15% obtained 1,639 kg/cm2, 3,189 kg/cm2, 3,440 kg/cm2, dan 3,603 kg/cm2.
 Keywords: Stabilization, Unconfined Compression Strength, Waste Red Brick

Road Performance Investigation on Fiber-Reinforced Recycled Cement Base Material.

The characteristics of the materials used in early buildings in China have led to a large proportion of discarded red bricks among the construction waste generated by demolishing abandoned buildings. The application of red brick aggregate with a particle size ≤5 mm and red brick powder with particle size 0.125~0.75 mm (referred to as recycled brick powder) was studied in this study after the crushing of waste red brick in road structures. The research results will provide a theoretical basis for the whole-grain recycling of waste red brick aggregate. The aggregate of red brick with a particle size smaller than 2 mm was mixed with different amounts of cement soil and fiber to prepare a cement-stable binder for the sub-base material. The recycled brick powder of 0.125~0.75 mm was used to replace the quartz sand with different substitution rates. As pavement materials, different amounts of fiber were used to prepare fiber-reinforced recycled-brick-powder cementitious composites. The optimal mixing ratio of the two materials was evaluated from the mechanical properties. The results showed that the optimal mixing ratio of the cement-stable binder was as follows: waste-red-brick-aggregate content was 50%, cement content was 4%, and fiber content was 0.2%. The optimum ratio of fiber-reinforced recycled-brick-powder cementitious composites was determined to be as follows: the replacement rate of recycled brick powder is 25%, and the content of PVA fiber is 1%. The regression analysis was used to fit the equations between the fiber content and the 7d unconfined compressive strength and the tensile strength of the cement-stabilized binder for different red-brick-aggregate admixtures at 4% cement content. A scanning electron microscope was used to observe the failure modes of the fiber. The influence of failure modes, such as pulling out, fracture, and plastic deformation, on the mechanical properties was expounded.

Preliminary study on preparation of unfired bricks using filter cake from tunnel muck

Disposal of tunnel muck is a thorny issue in tunnel construction, which has adverse social, environmental and economic impacts. At present, the gravel, sand and water in the tunnel muck can be reasonably recycled, while filter cake (FC), the clay content in the tunnel muck, is still treated by landfill. In this work, based on a comprehensive test plan with three parameters and five variations for each parameter, FC was initially used to prepare unfired bricks, and the possibility of resource utilization of FC was explored. Furthermore, unconfined compressive strength and water resistance of unfired bricks were systematically investigated. Results showed that the maximum strength of the prepared unfired brick samples could reach 25.7 MPa which achieved the requirements of MU25, and the incorporation of an appropriate amount of waste red brick powder (WRBP) and ionic soil stabilizer (ISS) could significantly improve the unconfined compressive strength and water resistance of unfired bricks. Therefore, FC had great potential to replace clay to prepare unfired bricks instead of being deposited as wastes.

Reusing waste red brick powder as partial mineral precursor in eco-friendly binders: Reaction kinetics, microstructure and life-cycle assessment

A large number of solid wastes are produced in the process of demolishing old buildings, and waste red brick is one of such wastes. To discuss the reutilization of waste red brick powder (WRBP) in alkali-activated material, a novel ternary eco-friendly binder was prepared by using slag, fly ash and WRBP as precursor. The impact of WRBP on the reaction kinetics, microstructure and life-cycle assessment of alkali-activated cement paste were evaluated. The Johnson-Mehl-Avrami-Kolmogrov model was established based on the heat release results. With the incorporation of WRBP, the degree of reaction was deepened, supporting the enhancement of matrix strength. X-ray diffraction and thermogravimetric analysis results show the consistent mineralogical composition of reaction products and increase of gel quantity. Pore characteristics determined by mercury intrusion porosimetry method exhibit that large capillary pores were refined by enrichment of gels and filling effect of WRBP. From the economic and environmental aspects, the reuse of WRBP significantly saved the energy consumption and reduced the carbon dioxide (CO2) emission. On the basis of the optimal compressive strength, the energy consumption efficiency index and CO2 intensity index were 27.3 MJ/MPa and 1.7 kg/MPa, which can provide 38.55% energy consumption and 44.90% carbon footprint savings. Such work may shed valuable insights to the recycling of various types of solid waste and low-carbonation of building field.

Investigation on steel fiber strengthening of waste brick aggregate cementitious composites

The waste red brick aggregate substituted with natural coarse aggregate can effectively alleviate environmental pollution in engineering concrete constructions. However, its mechanical performance lags far behind natural coarse aggregate due to micro-pore voids and micro-cracks. Three types of steel fiber contents (0, 1%, and 2%) are selected to improve the mechanical behavior of recycled concrete in this study. Cubic compression test, splitting tensile test, prism compression test, and static compressive elastic modulus test are carried out to study the influence of steel fiber content and replacement rate of recycled coarse aggregate. In addition, the stress-strain behavior and failure mechanism of steel fiber recycled brick aggregate concrete are discussed, and microscopic crack development is also analyzed. Test results show that the specimens without steel fiber are prone to aggregate destruction under loading. The cubic and prismatic compressive strength decreased by 48% and 34%, while the splitting tensile strength reduced by 40%. The mechanical properties substantially improve when the steel fiber content is 1%. The finite element model of steel fiber recycled brick aggregate concrete under uniaxial compression is established. The constitutive model for predicting uniaxial compression of steel fiber recycled brick aggregate concrete is also proposed.