Mechanical properties and freeze–thaw resistance of polyurethane-based polymer mortar with crumb rubber powder

Jiang, Wenlixia; Zhu, Han; Haruna, Sadi İbrahim; Shao, Jianwen; Yu, Yong; Wu, Kexiao

doi:10.1016/j.conbuildmat.2022.129040

Cited by 14 publications

(8 citation statements)

References 49 publications

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“…The D 50 values of the IOT powders were 5.143 µm and 4.346 µm; the D 90 values of the IOT powers after grinding for 20 s and 180 s were 16.586 µm and 14.667 µm, respectively. It was reported that the activity could be greatly improved when the particle size of the tailings was less than 20 µm [28,29]. When grinding for 20 s, the iron tailing powder used in this experiment was reduced from 38.547 to 16.588, a decrease of 59.96%.…”

Section: Mechanical Activation Of Iron Ore Tailingsmentioning

confidence: 77%

The Preparation and Dust Suppression Performance Evaluation of Iron Ore Tailing-Based Cementitious Composites

Nie,

Li,

et al. 2024

Molecules

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In order to comprehensively utilize iron ore tailings (IOTs), the possibility of using IOTs as raw materials for the preparation of cementitious composites (IOTCCs) was investigated, and IOTCC was further applied to mine interface pollution control. The mechanical properties, hydration products, wind erosion resistance, and freeze–thaw (F–T) cycle resistance of IOTCCs were evaluated rigorously. The activity index of iron tailings increased from 42% to 78% after grinding for 20 s. The IOTCC was prepared by blending 86% IOT, 10% ground granulated blast-furnace slag (GGBS), and 4% cement clinker. Meanwhile, the hydration products mainly comprised ettringite, calcium hydroxide, and C-S-H gel, and they were characterized via XRD, IR, and SEM. It was observed that ettringite and C-S-H gel were principally responsible for the strength development of IOTCC mortars with an increase in curing time. The results show that the kaolinite of the tailings was decomposed largely after mechanical activation, which promoted the cementitious property of IOT.

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Section: Mechanical Activation Of Iron Ore Tailingsmentioning

confidence: 77%

The Preparation and Dust Suppression Performance Evaluation of Iron Ore Tailing-Based Cementitious Composites

Nie,

Li,

et al. 2024

Molecules

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“…Subsequently, the specimen was placed into the testing drum, excluding the presence of a steel ball. The machine was then operated at speeds ranging from 30 to 33 rpm, completing a total of 300 rotations at a room temperature of 28 2 ℃. Following the completion of this process, the sample was carefully extracted from the machine, and its weight was measured to determine the level of abrasion.…”

Section: Cantabro Testmentioning

confidence: 99%

“…One promising approach is the use of polymer-modified asphalt binders [10,24,25], which can enhance the mechanical properties of the mixture, such as stiffness, strength, and resistance to deformation [26,27]. The addition of crumb rubber powder from waste car tires and epoxy resin has also been investigated to further improve the properties of the mixture [25,28,29]. Recent research has confirmed the feasibility of crumb rubber application into the asphalt concrete for sustainability development purposes [30,31].…”

Section: Introductionmentioning

confidence: 99%

Durability of Polymer-Modified Asphalt Mixture with Wasted Tire Powder and Epoxy Resin under Tropical Climate Curing Conditions

Kim

2023

Polymers

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The quality of pavements in tropical climates is negatively affected by the frequent wet and dry cycles during the rainy season, as well as by issues related to overloading from heavy trucks and traffic congestion. Contributing to this deterioration are factors such as acid rainwater, heavy traffic oils, and municipal debris. In light of these challenges, this study aims to assess the viability of a polymer-modified asphalt concrete mixture. This study investigates the feasibility of a polymer-modified asphalt concrete mixture with the addition of 6% crumb rubber powder from waste car tires and 3% epoxy resin to counter the harsh conditions of tropical climate weather. The study involved subjecting test specimens to five to 10 cycles of contaminated water (100% rainwater + 10% used oil from trucks), curing for 12 h, and air drying in a chamber of 50 °C for 12 h to simulate critical curing conditions. The specimens underwent fundamental laboratory performance tests such as the indirect tensile strength test, dynamic modulus test, four points bending test, and Cantabro test, as well as the double load condition in the Hamburg wheel tracking test to determine the effectiveness of the proposed polymer-modified material in actual conditions. The test results confirmed that the simulated curing cycles had a critical impact on the durability of the specimens, with the greater curing cycles leading to a significant drop in the strength of the material. For example, the TSR ratio of the control mixture dropped from 90% to 83% and 76% after five and 10 curing cycles, respectively. Meanwhile, the modified mixture showed a decrease from 93% to 88% and 85% under the same conditions. The test results revealed that the effectiveness of the modified mixture outperformed the conventional condition in all tests, with a more prominent impact observed under overload conditions. Under double conditions in the Hamburg wheel tracking test and a curing condition of 10 cycles, the maximum deformation of the control mixture sharply increased from 6.91 to 22.7 mm, whereas the modified mixture increased from 5.21 to 12.4 mm. Overall, the test results confirm the durability of the polymer-modified asphalt concrete mixture under harsh tropical climate conditions, promoting its application for sustainable pavements, especially in Southeast Asian countries.

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“…The number of impacting blows was recorded as the failure strength of the test specimen. A related study by Jiang et al [55], which evaluated the freezing and thawing process of PU-based polymer mortar containing crumb rubber, indicated that there was no cracking at the specimens' surface and edges after 200 freeze-thaw cycles and reported a negative mass loss of PU-based polymer mortar at different freezing and thaw cycles. The average first crack strength (N) and failure strength (NU) and their corresponding energy absorption capacity for polymer concrete from the three mixing conditions and that normal concrete are shown in Table 2.…”

Section: Dynamic Response Of U-shaped Pupc Specimensmentioning

confidence: 99%

Experimental and Statistical Analysis of U-Shaped Polyurethane-Based Polymer Concrete under Static and Impact Loads as a Repair Material

et al. 2022

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The prolonged service life of civil engineering structures, such as buildings and highway pavement, means that they deteriorate with time, requiring frequent repair work. Polyurethane (PU) materials can effectively maintain engineering structures such as road pavement, runways, and buildings. Thus, the mechanical properties and dynamic performance of these materials for repair are essential to guarantee the safe usage of the facilities. This study investigated the strain–stress behavior and impact strength of polyurethane-based polymer concrete (PUPC) mixtures. Moreover, the tensile stress–strain behavior of rigid PU grout (PUGC) materials was evaluated. The result indicated that the U-shaped PUPC with 20% PU by weight experienced a maximum failure strain of 0.9% and 4.2% under static and dynamic loads, respectively. The average impact energy of PUPC was 3825% higher than that of normal concrete. According to PUGC’s mixing ratios, the average elastic modulus revealed an increasing trend, whereas ultimate strength, yield strain, yield stress, and failure stress showed a decreasing trend. Weibull distribution results showed that the probabilistic distribution of the impact strength followed the two-parameter Weibull distribution.

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Mechanical properties and freeze–thaw resistance of polyurethane-based polymer mortar with crumb rubber powder

Cited by 14 publications

References 49 publications

The Preparation and Dust Suppression Performance Evaluation of Iron Ore Tailing-Based Cementitious Composites

The Preparation and Dust Suppression Performance Evaluation of Iron Ore Tailing-Based Cementitious Composites

Durability of Polymer-Modified Asphalt Mixture with Wasted Tire Powder and Epoxy Resin under Tropical Climate Curing Conditions

Experimental and Statistical Analysis of U-Shaped Polyurethane-Based Polymer Concrete under Static and Impact Loads as a Repair Material

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