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    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
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    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <link>https://trid.trb.org/</link>
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    <item>
      <title>Magnesium chloride deicer and asphalt: a multiscale approach to adhesion and damage characterisation</title>
      <link>https://trid.trb.org/View/2618000</link>
      <description><![CDATA[The combined effects of magnesium chloride (MgCl₂) deicer and freeze-thaw (F-T) accelerate the progression of moisture-induced damage in asphalt pavements. A multiscale approach was employed to evaluate adhesion and debonding mechanisms in systems of a polymer-modified asphalt binder and different aggregates subjected to various concentrations of aqueous MgCl₂ solutions and F-T cycles. Pull-off tests conducted on binder-aggregate samples revealed that the pull-off strength and failure mechanism were affected by the salt concentrations and aggregates’ mineralogies. Investigating the adhesion and debonding using the surface free energy, a thermodynamic approach, showed that depending on the aggregate type, lower salt concentrations could accelerate adhesion decay at a higher rate compared to higher salt concentrations. Atomic force microscopy study revealed that salt concentration and F-T cycles significantly affected the microstructure, morphology, and micromechanical characteristics of the asphalt binder, contributing to an accelerated loss of adhesion in asphalt binder-aggregate systems.]]></description>
      <pubDate>Mon, 09 Feb 2026 13:55:11 GMT</pubDate>
      <guid>https://trid.trb.org/View/2618000</guid>
    </item>
    <item>
      <title>Unlocking the potential of mine overburden materials and coconut coir geotextile: a full-scale study on reinforcing low-volume roads in India</title>
      <link>https://trid.trb.org/View/2618021</link>
      <description><![CDATA[Utilizing Mine Overburden Materials (MOM) in low-volume road construction, reinforced with Coconut Coir Geotextiles (CGT), presents an innovative and sustainable approach. This research investigates the mechanical performance of MOM and CGT through a series of micro-studies, small-scale and large-scale tests, including California Bearing Ratio (CBR) and Static Plate Load Tests, providing quantitative insights into their effectiveness. Small-scale tests demonstrated a substantial improvement in load-bearing capacity with coir geotextile reinforcement. The reinforced untreated coir geotextile (RUTC) increased the unsoaked CBR of MOM from 76.40% to 95.98%, while reinforced bitumen-treated coir geotextiles (RTC1 and RTC2), treated with 0.5 and 0.6 kg/m² bitumen, further enhanced the CBR to 107.36% and 134.01%, respectively. In soaked conditions, the CBR improved from 57% (unreinforced) to 64.98% with RUTC and 97.3% with RTC2. Large-scale studies confirmed the effectiveness of coir geotextile reinforcement, particularly with bitumen treatment. The Modulus Improvement Factor (MIF) for RTC2 achieved 2.06 under obtained maximum subgrade density and 2.61 in weak subgrade conditions, indicating significant advancements in load distribution and settlement reduction. The study confirms that reinforcing MOM with bitumen-treated coir geotextiles significantly enhances the structural integrity of low-volume roads, providing a cost-effective solution.]]></description>
      <pubDate>Mon, 09 Feb 2026 13:55:11 GMT</pubDate>
      <guid>https://trid.trb.org/View/2618021</guid>
    </item>
    <item>
      <title>Analytical Solution of Displacement and Stress Induced by the Sequential Excavation of Shallow Twin Noncircular Tunnels in Viscoelastic Rock</title>
      <link>https://trid.trb.org/View/2636051</link>
      <description><![CDATA[Nowadays, excavation of twin noncircular tunnels is becoming increasingly common. Generally, noncircular tunnels or smaller tunnel spacing would result in stress concentration, posing the underground structures subjected to dangerous conditions. Furthermore, the impact of surcharge loads on the stability of shallow buried tunnels is significant. This study proposes an analytical solution that can efficiently predict the mechanical response of the surrounding rock of shallow twin noncircular tunnels in time-dependent rocks. All key factors are thoroughly considered, including the viscoelastic properties of the rock mass, surcharge loads, arbitrary tunnel shapes and arrangements, excavation sequencing, and the pressures at the internal tunnel boundaries. Combining the complex function method with the conformal transformation technique, an elastic analytical solution for shallow buried noncircular tunnels is obtained. After that, based on the solution of a single tunnel, the elastic analytical solution of shallow twin noncircular tunnels is derived using the Schwartz alternating method. Then, based on the principle of correspondence between elastic and viscoelastic problems, the viscoelastic analytical solution for shallow twin noncircular tunnels is obtained. The comparison between the analytical solution and the finite-element numerical results is very consistent. Parametric analyses are then conducted on the step-by-step excavation of the twin tunnels to examine the effects of surcharge location, tunnel arrangement, and tunnel spacing on displacements and stresses. The analytical solution of this paper helps to reveal the mechanical mechanism of the step-by-step excavation of shallow buried twin noncircular tunnels in viscoelastic semi-infinite rock masses. Additionally, it can be applied to the preliminary design of similar shallow buried tunnels in the future.]]></description>
      <pubDate>Wed, 04 Feb 2026 16:28:52 GMT</pubDate>
      <guid>https://trid.trb.org/View/2636051</guid>
    </item>
    <item>
      <title>Investigation of the impact of mineral adsorption on asphalt binder aging through rheological and chemical analyses</title>
      <link>https://trid.trb.org/View/2643547</link>
      <description><![CDATA[Mineral aggregate is a significant constituent of any given asphalt mixture, and the aging performance of the binder is affected by the adsorption characteristics of the binder onto the mineral aggregate surface. In this study, the minerals commonly found in aggregates (CaO, MgO, Fe₂O₃, Al₂O₃ and SiO₂) were used as representative model compounds. The residual-free asphalt binder after adsorption on different mineral types was obtained using a novel mineral adsorption column technique developed for this study. The macro- and micro-properties of the residual asphalt binders before and after aging were compared, and the effect of different types of mineral adsorption on the aging of the asphalt binder was explored. The polar fractions-based composition of the residual free asphalt binder was utilised to better understand the mechanisms of asphalt binder adsorption by minerals. The results showed that the effect of binder adsorption on different types of minerals on binder aging performance varies with the mineral type. Due to the selective adsorption of different minerals, the polarity transformation of asphalt binder components accelerated and also affected the binder aging.]]></description>
      <pubDate>Sun, 01 Feb 2026 16:32:19 GMT</pubDate>
      <guid>https://trid.trb.org/View/2643547</guid>
    </item>
    <item>
      <title>Effect of the geometrical and physical nature of filler on the rheological properties of mastics</title>
      <link>https://trid.trb.org/View/2643661</link>
      <description><![CDATA[This study investigates properties of mastics produced with 70/100 neat bitumen, three mineral fillers (granite, quartz-granite, and diorite), and a lime-based active filler at filler-to-bitumen (F/B) ratios of 40%, 50%, and 60%. The physical, geometrical, and mineralogical properties of the fillers were assessed. Their influence on mastics' behavior was evaluated using conventional penetration and softening point tests, as well as frequency sweep tests at different temperatures with a dynamic shear rheometer (DSR). Although mineral components are not strongly correlated with mastic behavior, differences in particle size distribution and rigid void (RV) properties explain the varying stiffening effects. Granite, with finer particles, had the least rut resistance, while diorite, with coarser particles, had the greatest resistance at F/B values of 40% and 60%. Quartz-granite exhibited the highest F/B ratio dependency and strongest interaction with bitumen at 50% F/B at lower temperatures, highlighting the importance of selecting the appropriate filler proportion over the filler type when the features are similar. The study underscores necessity of using DSR to assess mastics with diverse fillers across various conditions. Therefore, two equations to estimate the complex modulus |G*| from standardized softening point test and RV normalized with F/B ratio are proposed, which require further research.]]></description>
      <pubDate>Thu, 29 Jan 2026 17:02:24 GMT</pubDate>
      <guid>https://trid.trb.org/View/2643661</guid>
    </item>
    <item>
      <title>The Suitability of Periwinkle Shell Dust as Mineral Filler in Asphalt Mixtures</title>
      <link>https://trid.trb.org/View/2561963</link>
      <description><![CDATA[The suitability of Periwinkle shell dust, from periwinkle snail, a small gastropod sea snail Tympanotonosfuscatus, as mineral filler in asphalt mixtures, was investigated. Laboratory tests such as chemical constituent analysis, sieve analysis, specific gravity, and plasticity index of the periwinkle shell dust were conducted. Also, chemical constituent, sieve analysis, specific gravity, and plasticity index of quarry dust (as control) were conducted. Hot Mix Asphalt (HMA) was designed, and briquettes were prepared using 100% quarry dust (control), percentage variations of quarry dust and periwinkle shell dust, and finally 100% periwinkle shell dust. Marshall Method for asphalt mix design was used, and Tests for stability and flow were conducted for all briquettes. Choosing a design air void content of 4.0% at optimum bitumen content of 6.30%, the stability of control asphalt (100% quarry dust) gave 7.84 kN, and the stability of periwinkle asphalt (100% periwinkle shell dust) gave 6.93 kN as against 3.5 kN as a minimum requirement in standard specification for roads and bridges. A flow of 2.88 mm was recorded for control asphalt, while a flow of 2.46 mm was recorded for periwinkle asphalt. Void in mineral aggregate for control asphalt was found to be 17.81% and that of the periwinkle asphalt was found to be 18.64%. Void filled with bitumen for control asphalt was found to be 78.4% and that of periwinkle asphalt was found to be 76.23%. Higher stability of 8.02 kN was recorded at a variation of 90% quarry dust and 10% periwinkle dust. Compressive strength of periwinkle asphalt concrete increased with the increasing inclusion of quarry dust. From this study, it can be concluded that periwinkle shell dust can be used 100% as mineral filler in asphalt mixtures as well as in variations with quarry dust.]]></description>
      <pubDate>Tue, 27 Jan 2026 16:16:15 GMT</pubDate>
      <guid>https://trid.trb.org/View/2561963</guid>
    </item>
    <item>
      <title>A logistic threshold model for asphalt-aggregate adhesion based on mineral composition</title>
      <link>https://trid.trb.org/View/2636353</link>
      <description><![CDATA[This study establishes a quantitative framework to predict asphalt-aggregate adhesion based on mineral composition. We systematically investigated the interfacial behavior using simulated minerals (SiO₂/CaCO₅ blends at 0, 30, 40, 50, 60, 70, and 100 % SiO₂ content) and five natural aggregates. Methods included FTIR-based adsorption tests and water immersion stripping experiments across three asphalt grades (A50, A70, A90). Results revealed a sigmoidal correlation between SiO₂ content and adhesion loss, effectively captured by a novel logistic threshold model. The model identified critical boundaries: a Safe Zone (SiO₂ < 45 %) with minimal stripping (<5 %), a Transition Zone (45–65 % SiO₂), and a Failure Zone (>65 % SiO₂) with severe damage. For natural aggregates, the combined SiO₂+Al₂O₃ content provided a similar logistic relationship, with zones at < 60 %, 60–85 %, and > 85 %, respectively. Asphalt properties (e.g., softening point, viscosity) significantly influenced these thresholds. These findings provide quantitative, practical criteria for aggregate selection and optimization of asphalt mixtures, especially when incorporating non-traditional or acidic aggregates.]]></description>
      <pubDate>Wed, 31 Dec 2025 10:58:24 GMT</pubDate>
      <guid>https://trid.trb.org/View/2636353</guid>
    </item>
    <item>
      <title>Implementation of hydrated lime derived from scallop shell waste as mineral filler in Stone Mastic Asphalt (SMA) mixtures</title>
      <link>https://trid.trb.org/View/2616467</link>
      <description><![CDATA[Scallop shells represent a by-product of the Peruvian aquaculture industry that currently lacks adequate management strategies, with no effective measures implemented to mitigate the environmental impacts associated with their disposal. This situation is particularly critical given that Peru is among the leading exporters of scallops worldwide, which results in the continuous generation of substantial shell waste. To address this challenge, the potential valorization of scallop shell waste through its transformation into hydrated lime is explored, thereby reducing its environmental burden and promoting sustainable waste management practices. This study assesses the feasibility of replacing commercial hydrated lime (HL) with hydrated lime derived from scallop shells (SSHL), a by-product of the Peruvian aquaculture industry, as a mineral filler in Stone Mastic Asphalt (SMA) mixtures. Chemical analyses using FTIR, SEM, XRD, and XRF techniques were conducted to compare the purity and structural similarity of both materials. In this study, SMA mixtures were modified with 0.30 % fibre and 2.5 % mineral filler by total mixture weight and evaluated through volumetric and mechanical tests. Standardised laboratory methods were employed, including volumetric properties, draindown (Schellenberg) test, stiffness modulus, moisture damage, permanent deformation (Hamburg wheel tracking), and fatigue resistance (IDEAL-CT). The results indicate that SSHL meets volumetric requirements and exhibits satisfactory mechanical performance, comparable to that of commercial hydrated lime. Therefore, SSHL emerges as a sustainable and technically viable alternative for use as a mineral filler in SMA mixtures, contributing to aquaculture waste valorisation and enhancing asphalt pavement performance within the Peruvian context.]]></description>
      <pubDate>Mon, 22 Dec 2025 16:41:22 GMT</pubDate>
      <guid>https://trid.trb.org/View/2616467</guid>
    </item>
    <item>
      <title>Dynamic Analysis of Displacement of Asphalt Pavement Considering Viscoelastic Properties Under Thermal Coupling</title>
      <link>https://trid.trb.org/View/2643109</link>
      <description><![CDATA[To investigate the displacement variations in asphalt pavement under thermal and vehicular loads within a viscoelastic structural framework, this study applies the modified Burgers viscoelastic model to a layered transversely isotropic system. First, by combining the modified Burgers equation and the basic motion equations of a single-layer system, this study utilizes the transfer relationships in single-layer and layered viscoelastic systems to establish the Green’s function equation for displacement response. Second, it derives the dynamic response equation under vehicle and temperature loads using the Fourier transform. Finally, based on the displacement response equation, Python and adaptive integration technology are used to generate displacement change surfaces in all directions in three-dimensional space. The results indicate that the displacement field exhibits symmetry and significant oscillations in three directions, with nonuniformly distributed extreme values in the w-direction, leading to reduced bearing capacity. Displacements under loading decay exponentially with increasing coordinates, and boundary areas exhibit an increasing trend, highlighting the complexity and variability in displacement changes. The structural displacement of asphalt pavement demonstrates typical nonlinear characteristics, with fluctuation amplitudes increasing significantly over time. This study provides a theoretical basis for understanding the damage evolution mechanism of asphalt pavement under multiphysical field coupling and could be a scientific reference for the design and optimization of asphalt pavement structures in road engineering.]]></description>
      <pubDate>Mon, 22 Dec 2025 16:07:48 GMT</pubDate>
      <guid>https://trid.trb.org/View/2643109</guid>
    </item>
    <item>
      <title>Synergistic enhancement of bituminous concrete mixture performance with polypropylene granule modified binder and rice husk ash as mineral filler substitute</title>
      <link>https://trid.trb.org/View/2636877</link>
      <description><![CDATA[Flexible pavements are typically constructed as layered systems, wherein high-quality materials are utilized in the surface layers while low quality materials are employed in the base layers. The use of conventional materials like straight-run bitumen and natural aggregates has led to resource depletion and significant environmental concerns. To address these issues, innovative waste and recyclable materials, including modified binders, reclaimed asphalt pavement (RAP), and artificial aggregates, are being adopted. This research aimed to investigate the performance of bituminous concrete grade I by substituting the mineral fillers with waste materials and straight run binder with modified binder. Plastics derived from polyethylene and polypropylene offer environmental benefits, as they lack chlorine and do not emit harmful gases. The optimal dosage of polypropylene granules (PPG) to enhance VG 40 bitumen properties was determined as 3%. Fourier transform infrared spectroscopy (FTIR) showed improved aging resistance in the PPG-modified binder, while X-ray diffraction (XRD) revealed a semi-crystalline structure. Bituminous concrete Grade I mixes were prepared by replacing conventional mineral filler with rice husk ash (RHA) at varying levels (25%, 50%, 75%, and 100%) as per MoRT&H guidelines. The performance was evaluated for Marshall stability, indirect tensile strength, moisture resistance, resilient modulus, fatigue, rutting behavior, and fracture properties. The mix containing 3% PPG and 50% RHA (MBRHA50) showed improved moisture susceptibility by 7%, resilient modulus by 20.5%, rutting resistance by 29%, and fatigue life by 48.61% compared to the control mix. Fracture investigations revealed superior performance of the MBRHA50 mix over the control mix. Grey relational analysis was conducted to rank the mixes. This study has demonstrated the clear enhancement of bituminous concrete mix performance through the blending of waste and recycled materials, contributing to sustainable asphalt pavement technologies.]]></description>
      <pubDate>Mon, 22 Dec 2025 10:59:50 GMT</pubDate>
      <guid>https://trid.trb.org/View/2636877</guid>
    </item>
    <item>
      <title>Taconite as a Lower-Cost, Alternative High Friction Surface Treatment to Calcined Bauxite for Low Volume Roads in Minnesota</title>
      <link>https://trid.trb.org/View/2636124</link>
      <description><![CDATA[This four+ year project (2020-2025) assessed whether friction aggregate produced from a byproduct generated by Minnesota’s taconite (iron ore) mining industry can provide adequate or comparable skid resistance performance to calcined bauxite in high friction surface treatment (HFST)-type applications. Six pavement test sections approximately 1/10 th of a mile (160 meters) in length were established at a low volume road location northwest of Duluth, Minnesota. Two epoxy-based HFST-equivalent test sections using taconite and calcined bauxite aggregate were the project’s focus. Three test sections of GSB (gilsonite)-based pavement preservation surface treatments utilizing a slightly finer gradation of taconite friction aggregate were also installed, while a section of existing chipseal pavement acted as the control. Friction properties were measured twice a year using a dynamic friction tester (DFT) and a British Pendulum (BP) Skid Resistance tester, while the Minnesota Department of Transportation’s (MnDOT’s) locked-wheel pavement friction tester (LWPFT) was used a minimum of once a year. Supplemental laboratory and environmental testing and a life cycle assessment (LCA) of HFST systems utilizing taconite and bauxite aggregate were also performed, as was a demonstration of SCRIM (Sideway-force Coefficient Routine Investigation Machine) technology. Taconite and calcined bauxite HFST test sections produced the highest friction numbers, about 40 to 50% higher than the chipseal control. Taconite’s friction numbers averaged 6% lower than calcined bauxite’s and exhibited virtually no divergence from calcined bauxite’s friction numbers over time. Collectively, project findings suggest that taconite aggregate can provide comparable friction performance to calcined bauxite, at a significantly smaller environmental footprint.]]></description>
      <pubDate>Mon, 15 Dec 2025 10:32:25 GMT</pubDate>
      <guid>https://trid.trb.org/View/2636124</guid>
    </item>
    <item>
      <title>Monitoring Method and System of Pre-Convergence Deformation of Soft Surrounding Rock Tunnel</title>
      <link>https://trid.trb.org/View/2633027</link>
      <description><![CDATA[The prediction and early warning of tunnel collapse in weak surrounding rock is very important for tunnel construction safety, but the current monitoring methods are insufficient. In view of the shortcomings of existing monitoring methods for deformation of advanced core soil, a monitoring method of pre-convergence deformation of advanced core soil in front of the tunnel face was proposed; this involves placing an array displacement meter (ADME) in a leading small conduit and monitoring the deformation of the leading small conduit. The coupling accuracy test data of the ADME and steel pipe were combined to prove the feasibility of the device and test method. Finally, it is proposed to place the ADME in the lead duct, calculate the displacement of the measuring unit through the change of gravity and angle, and obtain the pre-convergence deformation of the lead core soil in front of the palm face. The results show that the floating error of the measuring unit of the ADME is 0.2 mm by calibrating the precision measuring device designed by itself. The absolute error is 0.2 mm @ 1 m. When the ADME is used for deformation measurement with displacement greater than 2 mm @ 1 m, the relative error can be controlled within 10%. Through the above deformation monitoring system, it is expected to realize a real-time monitoring method which can ensure monitoring accuracy and frequency, reduce interference to tunnel construction, and improve the safety and accuracy of tunnel construction in weak surrounding rock.]]></description>
      <pubDate>Wed, 03 Dec 2025 10:27:28 GMT</pubDate>
      <guid>https://trid.trb.org/View/2633027</guid>
    </item>
    <item>
      <title>Study of effective asphalt film (EAF) structures with U-Net-based fully supervised learning</title>
      <link>https://trid.trb.org/View/2603213</link>
      <description><![CDATA[To gain deeper insights into the internal structural characteristics of asphalt mixtures and optimize their design methodology, this study employs a fully supervised deep neural network, U-Net, to analyze high-resolution cross-sectional images of asphalt mixtures. Considering aggregate particle diameters, relative positions between particles, and asphalt mixture types, this research systematically investigates the structural characteristics of the effective asphalt film (EAF). This study introduces the Cherry Model to characterize the bilayer structure of the EAF—for the first time revealing that mineral filler particles in the 2–32 μm range form its stable structural core, with distinct density layers at 7–15 μm and 15–50 μm. Four different asphalt mixture gradations (AC25, AC13, AM13, and OGFC13) were analyzed using both limestone and basalt aggregates. By leveraging high-resolution digital imaging and a fully supervised U-Net neural network model, the study successfully achieved precise identification of mineral filler particles with a minimum diameter of 2 μm. Furthermore, a combination of C+ + and Python programming languages was employed for statistical analysis of the EAF structure. The study reveals that the effective asphalt film is a permeable membrane-like structure commonly present within asphalt mixtures. Aggregates in the mixture can be functionally categorized into central particles (with diameters >2360 μm, serving as the dominant structural constituent for the asphalt film) and surrounding particles (with diameters <2360 μm, forming the primary constituents of the film). It was observed that the density of surrounding particles increases with distance from the surface of the central particles, and this distribution trend is significantly influenced by the type of mixture. Moreover, it was found that the distribution of surrounding particles within the EAF exhibits uniformity that transcends the physical morphology of the central particle. Additionally, the observed distribution pattern does not conform to classical mathematical functions, this shows its probabilistic characterization. These findings further validate the Cherry Model as an effective framework for describing the probabilistic, image-based stratification characteristics of the EAF, providing both visual and statistical support for its internal structure.]]></description>
      <pubDate>Wed, 12 Nov 2025 09:35:16 GMT</pubDate>
      <guid>https://trid.trb.org/View/2603213</guid>
    </item>
    <item>
      <title>Influence of Physicochemical Characteristics of Mineral Fillers on the Rheological Performance of Bituminous Mastic</title>
      <link>https://trid.trb.org/View/2620628</link>
      <description><![CDATA[This study investigates the influence of physicochemical characteristics of mineral filler passing 75?µm on the rheological behavior of bituminous mastic. Mastics were prepared with a polymer-modified binder and three different fillers—basalt, granite, and quartzite—in three different volumetric ratios (0.56, 0.60, 0.64). Lime was used as a partial replacement in one set of mastics to study the effect of lime. The physicochemical properties such as morphology, particle size distribution, specific surface area, surface free energy (SFE), and zeta potential of the mineral filler were measured. The Canny edge detection technique was used to extract the roughness metrics of the fillers from the scanning electron microscopy images. Surface-to-surface interparticle distance was also measured through the K-dimensional tree algorithm from the particle size distribution obtained through laser diffraction of filler particles. Among the mastics without lime, mastic with quartzite exhibited the highest stiffness, followed by granite and basalt. Replacement of filler with lime increased the stiffness in the case of basalt, whereas it decreased with granite, indicating intricate physicochemical interactions between lime, fillers, and binder. Regression analysis results underscored the importance of the properties of fillers in determining mastic’s rheological characteristics. Interparticle distance, Rigden voids, pore radius, and SFE are some key parameters found to be influencing the behavior of mastic without lime.]]></description>
      <pubDate>Sat, 08 Nov 2025 12:03:19 GMT</pubDate>
      <guid>https://trid.trb.org/View/2620628</guid>
    </item>
    <item>
      <title>Multiple targets displacement response identification in bridges via an enhanced monocular vision-based method</title>
      <link>https://trid.trb.org/View/2576705</link>
      <description><![CDATA[Routine displacement measurement of bridge structures is essential for accurate evaluation of structural safety. Vision-based displacement measurement methods, as a representative of non-contact techniques, offer distinct advantages over traditional contact-based approaches However, existing vision-based methods face challenges such as limited target coverage, high time costs, and complex operational requirements. To address these issues, this study introduces a simplified multi-target displacement response identification (MTDRI) method. The MTDRI integrates a subpixel displacement extraction technique with a novel monocular vision-based displacement measurement method. It requires only a single setup and three external parameters of the camera, i.e., the nearest perpendicular distance (LH), pitch (θ), and yaw (β) angle, to directly and automatically calculate the physical displacement of all targets, enhancing its applicability to field bridges. Static crossover validation tests and three sets of dynamic tests were conducted to evaluate the performance of the proposed method. The results show that the maximum error in the static displacements was 2.55 %, while the dynamic displacement responses achieved an RMSE of 0.43 mm and an NRSEM of 2.02 %. These findings confirm that the MTDRI outperforms traditional vision-based measurement methods and can accurately identify multi-target displacement responses of bridge structures.]]></description>
      <pubDate>Thu, 16 Oct 2025 17:02:35 GMT</pubDate>
      <guid>https://trid.trb.org/View/2576705</guid>
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