Addition Of Rubber Research Articles

Effect of pre-treated waste tire rubber on properties of concrete

In present day scenario the human activities have led to environmental degradation with increased urbanization contributing to many fold increase in constructing activities, which uses limited natural resources. Therefore, prevention of resource over-utilization and recycling of the waste is of utmost priority in construction sector. Waste tires rubber is one such potential material which can be used in concrete as replacement for fine aggregates replacement. This study represents the effect of addition of crumb rubber in concrete as sand replacement ranging from 5-20% on volume basis. The study evaluated the workability, compressive strength, ultrasonic pulse velocity (UPV), electrical resistivity and water permeability at 28 days. Tire rubber was also pre-treated with NaOH and KMnO4 as an effort to enhance its bonding characteristics. The contact angle was measure to test the efficacy of the treatment in reducing water hydrophobicity of crumb rubber. The treatment of tire rubber with NaOH and KMnO4 proved to be promising in regaining some of lost compressive strength and improved water permeability. However, both treatment processes didn’t have any significant effect on the workability. The NaOH treatment proved to be an overall better treatment than KMnO4 which was due to the reduced hydrophobicity as depicted by lower contact angle.

Effect of addition of rubber seeds flour (Hevea brasiliensis) in fish feed on growth and feeding efficiency of Gourami (Osphronemus goramy)

Gourami fish, Osphronemus goramy is an omnivorous organism that inhabits calm water sich as swamps, lakes. This study aims to determine the effect of using fermented rubber seeds to feed on the growth and survival of Gourami by feeding a mixture of fermented rubber seeds. The research was conducted at the Bungus Fish Seed Center, Padang City in January-February 2022 using the completely randomized design method with 4 treatments and 4 replications. The results showed that the best treatment was in treatment B with the addition of rubber seed flour that had been fermented as much as 30% so that the absolute weight gain value was (3.55 g), Specific Growth Rate (3.10%/day), Feed Conversion Ratio (0.19) and feed efficiency (51.03%). The lowest treatment was in treatment D where the addition of rubber seed flour fermentation was as much as 50% so that it had a bad effect on the growth rate of Gourami seed.

Prevalence of Type I Allergy to Latex and Type IV Allergy to Rubber Additives in Turkish Healthcare Workers.

Glove-induced dermatoses are frequently seen among healthcare workers (HCWs) and are often mistakenly defined as latex allergy. To determine the prevalences of (i) the symptoms of immediate type hypersensitivity reactions, (ii) the symptoms of hand eczema, (iii) latex sensitization detected using skin prick test (SPT), and (iv) contact hypersensitivity to rubber additives or glove pieces detected using patch test, in Turkish HCWs. Ninety-eight HCWs were included in the study. All subjects completed a questionnaire. All participants were skin prick tested for latex, and foods previously identified as concomitant allergens in latex-sensitive individuals; patch tested for 7 rubber additives, 3 additional haptens, and glove pieces. The mean age was 32.1 (± 9.4) years, and 71 (72.4%) participants were nurses. Eighty-four (85.7%) subjects had a history of mucocutaneous symptoms of immediate-type hypersensitivity occurring within the first 24 hours after latex glove contact, while 9 (9.2%) subjects demonstrated SPT positivity for latex. Eighty (81.6%) subjects had a history of glove-induced hand eczema symptoms, while patch test positivity for the rubber additives or glove pieces was in 17.3%. About one-tenth of those with a history of glove-induced type I hypersensitivity symptoms had true latex allergy, and one-quarter of those with a history of glove-related hand eczema symptoms had contact hypersensitivity to glove products. Therefore, rote avoidance of latex use is generally ineffective in the management of glove-related skin complaints. Individual measures should focus on reducing the use of soaps and disinfectants, and promoting the use of moisturizers, rather than glove choice.

Investigation of 6PPD-Quinone in Rubberized Asphalt Concrete Mixtures.

N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD)-quinone (6PPD-Q), a transformation byproduct of 6PPD used in tires as an antiozonant and antioxidant, was recently discovered as the chemical primarily responsible for the acute lethal toxicity of urban storm runoff to coho salmon. The asphalt concrete (AC) surface layer is the primary medium to contact 6PPD-Q immediately upon its release from tires, and the addition of recycled tire rubber (RTR) to the asphalt binder and mixture is a widely accepted practice in asphalt production. Therefore, it is urgent to understand the fate of 6PPD-Q at the asphalt concrete surface layer-water interface. This study analyzed the sorption and desorption of 6PPD-Q by compacted and crushed loose (loose particles, ∼5 mm) rubberized asphalt mixtures and their mobilization from compacted asphalt mixtures during simulated rainfall events. It should be noted that the crushed loose asphalt mixtures demonstrated the physicochemical properties of the asphalt materials, while the compacted asphalt mixtures represent in-service AC layers. Sorption of 6PPD-Q by crushed loose and compacted asphalt mixtures reached equilibrium within 12 days, with a sorption coefficient of 151.57-257.51 L/kg for compacted asphalt mixtures. Within 12 days, desorption of 6PPD-Q from crushed loose and compacted rubberized asphalt mixtures (20 g particles/L) to the double deionized (DDI) water and synthetic stormwater was 0.01-0.09 and 0.025-0.05 μg/L, respectively. Through the rainfall simulation experiments, 0.0015-0.0049 μg/L 6PPD-Q was detected in the runoff water, much lower than the lethal concentration (LC50) of 6PPD-Q of 0.095 μg/L and 308.67 μg/L for coho salmon and zebrafish larvae. Our results indicate that, while the release of 6PPD-Q from compacted rubberized asphalt mixtures is minor, the mixtures can serve as sorbents for tire-derived 6PPD-Q and retain this emerging contaminant.

Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling.

The aim of this study is to introduce a protective layer to safeguard tunnel structures. In practice, one viable approach to create this protective layer between the tunnel structure and surrounding rocks is to pump the material during tunnel construction. The primary components of the proposed material are porous sand, rubber, and cement. Static and dynamic experiments were conducted to assess the unconfined compressive strength (UCS), flexural stiffness, and compaction resistance at various mixing ratios. The results indicate that the addition of porous sand decreases the UCS compared to the solid sand under similar mixing conditions. The addition of rubber offers the elasticity, thereby enhancing the compaction resistance. However, increasing the rubber content compromises UCS. Furthermore, this study presents a linear equation to predict the 7-day UCS, which can be used as a rapid estimation for UCS, flexural stiffness, and compaction resistance of the proposed material. It is important to note that this study only investigates the fundamental mechanical properties of the proposed material, and further comprehensive research is necessary to fully understand its workability, durability, and other behaviour before practical application.

Application of Microgranule from IAA Producing-Endophytic Bacterial as Biofetilizer on Rubber Plants (Hevea brasiliences Muell. Arg.)

Rubber plant (Hevea brasiliensis Muell.Arg) is the main commodity of plantations, some of whose products are exported and some to meet domestic needs as raw materials for industrial purposes. Purpose on research diversity and crateristics of endophytic bacteria producing hormone IAA from rubber plants. Then the effectiveness treatment of microgranules addition and immersion of endophite bacterial suspension and rubber seed soaking suspension to spur the growth of rubber plants. This research was conducted using the factorial CRD (Completely Randomized Design) method consisting of 16 treatments with 2 replications. The first factor was immersion of endophite bacterial suspension consisting of R0 = 0 hours; R1 = 12 hours; R2 = 24 hours and R3 = 36 hours and the second factor was the addition of microgranules consisting of J0 = 0 gr; J1 = 10 gr; J2 = 15 gr; J3 = 20 gr. The results of this study showed that the results on the isolation of endophite bacteria from the tea plant from the roots and stems of the tea plant yielded 3 isolates from plant roots and 2 isolates from plant stems. For IAA levels, the five isolates were positive. The use of endophytic bacteria as an alternative biofertilizer has a significant effect on the parameters observed

Study on Bitumen Modified with Crumb Rubber and PVC

Abstract: This study investigates the mechanical and rheological properties of bitumen modified with crumb rubber and polyvinyl chloride (PVC). The crumb rubber and PVC were added to bitumen at varying percentages and the resulting modified bitumen was tested for its viscosity, penetration, softening point, and elastic recovery. The results show that the addition of crumb rubber and PVC to bitumen improves its viscosity and elastic recovery properties, while reducing its penetration and softening point. The study also explores the optimal percentage of crumb rubber and PVC for modifying bitumen to achieve the desired mechanical and rheological properties. Overall, the study highlights the potential of using crumb rubber and PVC as sustainable additives for improving the performance of bitumen in road construction.

A Laboratory Study of Use of Crumb Rubber as Partial Replacement of Fine Aggregate in Concrete

Abstract: The aim of this study is to analyse the effect of addition of crumb rubber on the various properties of concrete. The crumb rubber is used as replacement over aggregates in the concrete mix. Crumb rubber is prepared from the scraps of tyres. In this study aggregates are replaced by 0%, 30%, 40%, 60%, 100% crumb rubber. The rubberized concrete is tested for slump and compression strength. It is found that the slump of rubberized concrete increases first but as the amount of rubber is increased the slump starts decreasing. It is observed that initial compression strength of rubberized concrete reduced significantly but the final strength is found to be more than that of ordinary concrete. Waste tyres cause tremendous pressure and ecological issues for the entire tyre industry when accumulated in cultivated land or combusted. Crumb rubber (<5 mm) grinded from waste tyres was introduced to substitute for natural fine aggregate in concrete and effectively solves the consumption challenge. This paper reviews the performance of concrete with crumb rubber as fine aggregate, providing evidence for crumb rubber concrete (CRC) materials design and application. Crumb rubber is characterized with light specific gravity, hydrophobicity and air entrapment in comparison with natural fine aggregate, inducing significant reduction in workability of fresh CRC and exhibiting poor bonding performance with cementitious matrix. By summarizing the compressive/tensile strength, elastic modulus and fracture behaviour of CRC at various rubber content, prediction models of strength reduction factors are proposed. The main reasons for strength deterioration are weak interface transition zone (ITZ) performance and non-uniform distribution of rubber particles. Water/chloride permeability, electrical/carbonation resistance and drying shrinkage of CRC are discussed for durability performance of CRC. Physical/chemical pre-treatments of rubber could alleviate the hydrophobicity and improve the mechanical and durability performance of transition zones between rubber and cement paste. Accordingly, scopes concerning the recycling of crumb rubber and its performance optimization are expected in future studies.

Prototype System for Production of Refuse Derived Fuel (RDF-5) from Municipal Solid Waste Using Natural Rubber as Binder

The development of RDF-5 fuel from community waste using natural rubber as a binder was investigated. The results showed that the calorific and heat values were increased proportionately to the amount of rubber added. The ratio with the highest calorific value was 50:50, followed by 75:25, 90:10, and 95:5. The calorific value was 40.67 MJ/kg (9720 kcal/kg), 40.24 MJ/kg (9,617 kcal/kg), 39.28 (9,389 kcal/kg) and 39.18 MJ/kg (9,365 kcal/kg), respectively. Compared with 100:0, have a calorific value of 38.84 MJ/kg (9,284 kcal/kg). The experimental addition of natural rubber as a binder makes the combustion process more complete, resulting in faster fuel ignition time or easier igniting, less ash content, and being environmentally friendly. The research team chose to develop the ratio of 95:5 because the economic analysis showed a fast payback period of only 5.72 years. So, the ratio of 95:5 is the optimal condition that can scale up to the industrial level. The production cost of RDF-5 is 1,935 baht/ton for 50 baht/kg of natural rubber. The amount of emission caused by the combustion process of RDF-5 (95:5) passed the standard. Therefore, the evaluation of this research found that RDF-5 fuels from community waste using natural rubber as a binder. It is one of the attractive alternatives to renewable fuel generation and solid waste management solutions and helps improve the environmental quality of communities.

Application of Mastic Asphalt Using Rubber Added Modified Bitumen

Transportation is the movement of people and goods from one place to another place. Besides there are many transportation systems in our country, road transportation has the most important place and has a share of 95 percent. Highways are structures that are built flexibly and rigidly on the ground floor and allow fast, safe and comfortable passage of vehicles. A road network that has an orderly distribution has become an important element in the development of countries. Because a strong and comfortable road network provides easy access to energy resources, fast and timely delivery of the products produced and saving time. Today, it is obvious that many studies need to be done in bitumen by adding various additives to bitumen in order to make the roads built more comfortable and durable. While polymer modification is now being applied effectively, it comes up to the agenda that it will provide better compaction and economic contributions by increasing the processability properties. Thanks to such additives, the workability feature can contribute to performance. In this study, different proportions of rubber additives, modified bitumen and mastic asphalt applications were discussed. Today, SMA (Stone, Mastic, Asphalt) layer is used as a high quality wear layer. SMA layers, which are generally obtained from mixtures of 70 - 80% coarse aggregate, 20 - 30% fine aggregate and 6 - 8% asphalt type (high amount of space between aggregates) stands out due to its features such as being more resistant to permanent damage and abrasion, higher quality and being more homogeneous and impermeable. any project success is defined by techniques improved quantity to facilitate effective cost control, cost and time estimation.

Repeated impact resistance of steel fibre-reinforced dry UHPC: Effects of fibre length, mixing method, fly ash content and crumb rubber

Dry concrete exhibits significantly different mechanical properties and failure patterns under dynamic loads from those under static conditions. Considering the practical applications of dry concrete, the flexural impact load renders its units/structures susceptible to unpredictable damage or even failure. In this study, the modified low-velocity drop-weight impact test was conducted on steel fibre-reinforced dry UHPC (FR-DUHPC) beam samples to simulate the frequent and multiple impact loads. The effects of steel fibre length, mixing method, fly ash content and crumb rubber addition on the impact resistance of FR-DUHPC were evaluated based on dynamic responses. Weibull distribution was then conducted to analyse the failure hit number of concrete samples in consideration of the large value variation. Test results indicated that the flexural impact performance was markedly improved with longer steel fibres, but deteriorated with increased fly ash content (especially at early ages) and considerably degraded with the inclusion of rubber aggregate. Hybrid medium/long fibre reinforcement was proposed for DUHPC that were mainly subjected to impact loads during service, while the fly ash content utilized to partially replace cement was not recommended to exceed 40%. Rubber aggregate was not proposed to be added to dry concrete mixtures since the impact load would greatly accentuate the initial matrix defects caused by the weak bonding. Additionally, the two-parameter Weibull distribution was verified to be a desirable statistical method for analysing the failure blow number of FR-DUHPC under repeated low-speed drop-weight impacts. The impact energy for the practical structural design could be preliminarily computed utilizing the derived Weibull parameters at different levels of reliability.

Experimental study on high temperatures performance of rubberized geopolymer mortar

Nowadays, fire accidents occur frequently, and both buildings and structures or traffic roads are threatened by fire to varying degrees, and the mortar structure is often in direct contact with fire. Therefore, it is necessary to study the performance of mortar under high temperature. Geopolymer is a new type of green environmental protection building material with good high temperature resistance. Waste rubber will soften and decompose under high temperature, and the holes formed can release the steam pressure inside the structure, which is helpful to ease the internal cracking of the structure. At present, it has been proved that waste rubber has a beneficial effect on the resistance of mortar to high temperature. The research of waste rubber in Portland cement mortar has made relevant achievements, but the research on the combination of geopolymer rubber is relatively small. Therefore, in view of this lack, this study supplements the material properties of geopolymer mortar under four rubber particle sizes (4, 1.7, 0.83, and 0.27 mm) and five temperatures (25, 200, 400, 600 and 800 °C), namely, surface observations, mass loss, compressive and flexural strengths, ultrasonic pulse velocity (UPV) and microstructure change. The results show that the addition of rubber particles will increase the mass loss of rubberized geopolymer mortar (RGM), but the advantage is that it can reduce the burst risk. The addition of fine particle rubber can improve the ability of RGM to resist cracking and deformation at higher temperatures. The results shows that the UPV can reflect the mass and intensity change of RGM laterally. The microscopic results shows that the main reason for the lower strength is the expansion of microcracks and pores in RGM matrix at high temperature.

Enhancing Bitumen Properties through the Utilization of Waste Polyethylene Terephthalate and Tyre Rubber

The disposal of waste accumulation has become a significant challenge in Oman due to the increasing population. Co-biodegradability issues arise from accumulating two types of non-co-biodegradable waste materials: plastic and rubber. Asphalted pavements experience various stresses resulting from high traffic density, leading to numerous problems. This study aims to investigate the impact of incorporating waste plastic and rubber on the engineering properties of bitumen. Specifically, the study examines the addition of waste tyre rubber (4% and 6%) and waste polyethylene terephthalate (PET) (4% and 6%) to bitumen with a grade of 85/100. Three tests were conducted to evaluate the physical properties of the bitumen, including softening points, penetration tests, and viscosity tests. The results demonstrate that the penetration of bitumen with the addition of 6% waste tyre rubber and PET was 9% lower compared to the 4% mixture for both waste materials. Furthermore, tyre rubber-modified bitumen exhibited higher softening points (79 °C, 2580 s) and viscosity when compared to plain bitumen (48 °C, 1800 s) and PET-modified bitumen (53 °C, 2150 s). These differences indicate that incorporating waste PET and tyre rubber improves the engineering properties of bitumen. This study highlights the importance of increasing the softening point of bitumen in Oman’s high-temperature areas.

Determination of 1,3-Diphenylguanidine, 1,3-Di-o-tolylguanidine, and 1,2,3-Triphenylguanidine in Human Urine Using Liquid Chromatography-Tandem Mass Spectrometry.

1,3-Diphenylguanidine (DPG), 1,3-di-o-tolylguanidine (DTG), and 1,2,3-triphenylguanidine (TPG) are rubber additives widely present in the indoor environment. Nevertheless, little is known about their human exposure. We developed a method for the quantification of DPG, DTG, and TPG in human urine, using high-performance liquid chromatography-tandem mass spectrometry. The quantitative analysis of target analytes at parts-per-trillion levels in urine was optimized using hydrophilic-lipophilic balanced solid-phase extraction and isotopic dilution. The method limits of detection and quantification were in the range of 0.002-0.02 and 0.005-0.05 ng/mL, respectively. The recoveries of all analytes in human urine fortified at 1, 5, 10, and 20 ng/mL concentrations were in the range of 75.3-111%, with standard deviations of 0.7-4%. The repeated measurement of similarly fortified human urine yielded intra-day and inter-day variations of 0.47-3.90 and 0.66-3.76%, respectively. The validated method was applied in the measurement of DPG, DTG, and TPG in real human urine samples, which revealed the occurrence of DPG in children's urine samples (n = 15) with a detection frequency of 73% and at a median concentration of 0.05 ng/mL. DPG was found in 20% of adults' urine samples (n = 20).

Degradation of Natural Rubber as Asphalt Mixes Modifier using UV-Ozone Light

The elastic properties of natural rubber are indispensable in improving the physical properties of asphalt mixtures. However, the long natural rubber molecule chains make it difficult to modify with other polymeric materials, so it needs to be degraded. In this study, the authors succeeded in degrading natural rubber using a combination of UV light and ozone with the addition of an H2O2 initiator; from the FTIR data, it appears that there are peaks indicating vibrations of the C=O and –OH groups indicating that natural rubber chain termination has occurred. The addition of natural rubber to asphalt was carried out with several variations, namely 8; 10; 12; 14; 16 % (to asphalt content), from the results of the softening point and ductility test of the asphalt mixture explained that the addition of 12 % natural rubber was the most optimum mixture. This result explains that efforts to degrade natural rubber using the UV - ozone combination method can increase the optimum insertion of natural rubber into asphalt mixtures by up to 100 % from previous studies.

The potential effect of crumb rubber on the maximum sound absorption performance of asphalt mixtures

In this research, several types of asphalt mixtures with the addition of crumb rubber (CR) from end-of-life tires (ELT) have been studied. The volumetric characteristics, texture surface and sound absorption (impedance tunnel) of the asphalt mixtures were analyzed in the laboratory. Based on the results obtained, a model for predicting sound absorption as a function of the volumetric characteristic and surface texture of the mixtures was proposed. It has been observed that the parameter that most strongly governs the sound absorption of the bituminous mixture is its void content. CR can moderately improve the sound absorption, especially in mixes with a high void content.

Blast failure and energy analysis of rubber-modified carbon-fiber vinyl-ester composite laminates

Modifications in vinyl ester resins, a popular matrix resin choice in naval applications through rubber additives, are being experimentally investigated in the current study. Toughening of the composite matrix resin using additives has been a popular choice, where it has been postulated that the inherent modifications to the base resin polymer would enhance the overall response of the composite structure to dynamic loadings. This work intends to understand the effect of such matrix modifications on the shock response of composite panels and the failure mechanism of a composite plate subjected to air shock loading. The study comprises material fabrication, resin and composite material characterization, and analysis of composite panels' response and damage evaluation under a range of shock loadings. A shock tube apparatus is used to generate controlled shock on composite laminates with fixed-fixed boundary conditions. In conjuncture, a high-speed 3-D DIC camera system is used to obtain full-field deformation and strain fields on the specimen's back face (furthest from the loading face). Based on the structural response and energy analysis, the effect of rubber modification is quantified and compared with non-modified resin composites, where the change is shown to improve the structural damping and energy dissipation under below-failure shock loadings and further shows relatively limited crack growth under high-intensity shock loadings.

Seismic performance of mechanically stabilized earth walls with Sand-Crumb rubber backfills of varying proportion

The applicability of crumb rubber mixed with sand as alternative fill material in mechanically stabilized earth (MSE) walls is investigated in the current study. Shaking table tests have been conducted to analyze the dynamic response of model geogrid reinforced earth walls subjected to three different base input motions. Eight different sand-crumb rubber mixture combinations were used as backfill. The outcomes of this study provide quantitative results on how base excitation amplitudes could influence the seismic behavior of the MSE walls in the presence of sand-rubber backfill. The results have been analyzed in terms of deformation and rotation of the wall, settlement of backfill, acceleration amplification, and earth pressure response. Wall displacement and backfill settlement was found to reduce with the addition of rubber in the sand. The maximum displacement at the top of the wall was found to reduce by 45% at a rubber content of 30% for high peak ground acceleration (PGA) input motion. Two-wedge failure was observed with the failure envelope inclined at an angle of 49° from the vertical. Apart from this, the strain in the geogrid was decreased with an increase in the rubber content. Hence, the rubber content of 30% mixed with sand can be considered an optimum percentage to control the dynamic performance of MSE walls. In the end, a cost-benefit analysis was conducted, and it was found that using rubber as a partial substitute for sand backfill reduces the overall cost of the project. This research will also promote the use of recyclable rubber as a construction material in highway construction.

Retracted: Non-Linear Analysis of Hybrid Reinforced T- Beam with Partial Substitution Recycled Rubberized Concrete

Abstract At present, the need to make use of industrial waste materials is increasing due to their harmful effects on the environment. In the present work, the behavior of hybrid reinforced T-Beam with partial substitution recycled rubberized concrete is studied. The finite element modeling by using ANSYS version 15 program. It contains also all the required steps needed to create the concrete models that were prepared to study the behavior of beams with partial substitution recycled rubberized concrete (RRC). The reinforcement of beams was various combinations of polymer GFRP and steel bars. The Rubberized concrete mixes were prepared by partial substitution 7.5 %, 10 %, and 12.5 % replacements by volume. The ratio of GFRP to steel reinforcement at mid‐span section was the second parameter investigated. Due to the large number of parameters affecting the behavior of Hybrid Reinforced T- Beam with partial substitution Recycled Rubberized Concrete, an extensive parametric study was performed using ANSYS version 15 program. Three parameters were investigated namely; Bottom RFT, compressive strength of concrete, and the existence of opening. The analytical results agree well with the experimental results in terms of mode of failure and the failure load values. The results indicated that although the flexural capacity of the tested specimen decreased with the addition of Crumb Rubber and reduced its self-weight. The failure load of the beam with partial substitution recycled rubberized concrete increases with bottom reinforcement by the GFRP bar or CFRP bar. Also, reinforced beams by CFRP bars had a higher failure load than reinforced beams by GFRP bars. Having an opening in hybrid reinforced T-Beam with partial substitution recycled rubberized concrete reduced the beam load capacity and maximum deflection. Also, using GFRP bars, and CFRP bars in the vicinity of openings in hybrid reinforced T-Beams increased the load capacity of these beams.

Fatigue Property Evaluation of Sustainable Porous Concrete Modified by Recycled Ground Tire Rubber/Silica Fume under Freeze-Thaw Cycles

As an environmentally friendly pavement material, porous concrete in seasonal frozen region is often subjected to repeated loads and freeze-thaw cycles. Therefore, the fatigue property of porous concrete under freeze-thaw is extremely important. However, few researches have been reported on the topic. Based on this background, this paper investigates the flexural fatigue property of ground tire rubber/silica fume composite modified porous concrete (GTR/SF-PC) with experimental and mathematical statistical methods. The flexural fatigue life of GTR/SF-PC under different freeze-thaw cycles (0, 15, 30) was tested with three-point flexural fatigue experiment at four stress levels (0.70, 0.75, 0.80, 0.85). Kaplan Meier survival analysis and Weibull model were adopted to analyze and characterize the flexural fatigue life. The fatigue life equations of GTR/SF-PC under different freeze-thaw cycles were established. The results indicate that, duo to the addition of ground tire rubber and silica fume, the static flexural strength of GTR/SF-PC is not significantly affected by freeze-thaw cycles. The flexural fatigue property of GTR/SF-PC is gradually deteriorated under the action of freeze-thaw cycles. Compared with 0 freeze-thaw cycles, the average flexural fatigue life of GTR/SF-PC decreases about 15% and the fatigue failure rate increases about 50% after 30 freeze-thaw cycles, respectively. The fatigue equations with different reliabilities of GTR/SF-PC show that the reliability is inversely proportional to fatigue life, therefore, the appropriate fatigue equation considering freeze-thaw effect is necessary for fatigue design of porous concrete.