Temperature Aging, Compression Recovery, Creep, and Weathering of a Foam Silicone Sealant for Bridge Expansion Joints

Malla, Ramesh B.; Shrestha, Matu R.; Shaw, Montgomery T.; Brijmohan, Smita B.

doi:10.1061/(asce)mt.1943-5533.0000166

Cited by 17 publications

(5 citation statements)

References 11 publications

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“…T1, which incorporates silicone foam as the tubular material, is relatively light in weight. The good elasticity and low density of silicone foams make it suitable to be used in challenging application such as shock absorbers, wound dressings, and joint sealants [29,30]. T2 and T3 both incorporate silicone rubber.…”

Section: Methodsmentioning

confidence: 99%

Effect of Silicone Inlaid Materials on Reinforcing Compressive Strength of Weft-Knitted Spacer Fabric for Cushioning Applications

Sukigara

Shirakihara

2021

Polymers

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Spacer fabrics are commonly used as cushioning materials. They can be reinforced by using a knitting method to inlay materials into the connective layer which reinforces the structure of the fabric. The compression properties of three samples that were fabricated by inlaying three different types of silicone-based elastic tubes and one sample without inlaid material have been investigated. The mechanical properties of the elastic tubes were evaluated and their relationship to the compression properties of the inlaid spacer fabrics was analysed. The compression behaviour of the spacer fabrics at an initial compressive strain of 10% is not affected by the presence of the inlaid tubes. The Young’s modulus of the inlaid tubes shows a correlation with fabric compression. Amongst the inlaid fabric samples, the spacer fabric inlaid with highly elastic silicone foam tubes can absorb more compression energy, while that inlaid with silicone tubes of higher tensile strength has higher compressive stiffness.

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Section: Methodsmentioning

confidence: 99%

Effect of Silicone Inlaid Materials on Reinforcing Compressive Strength of Weft-Knitted Spacer Fabric for Cushioning Applications

Sukigara

Shirakihara

2021

Polymers

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“…Data analysis research, based on displacement gauges from structural health monitoring (SHM) systems, has been conducted. A variety of methods, including correlation ftting [3,[7][8][9][10][11], mechanical performance analysis of bridge structures [12][13][14][15], Bayesian approaches [16,17], statistical machine learning [18], and data reconstruction [19,20], have been utilized to examine the displacement patterns of BEJs for damage evaluation. Te fndings indicate that the wear damage of BEJs is primarily due to large cumulative displacements, which are signifcantly infuenced by temperature and trafc loading.…”

Section: Introductionmentioning

confidence: 99%

Transformer‐Enhanced Traffic Load Simulation for Wear Evaluation of Bridge Expansion Joint

Dong,

Pan,

Wang

et al. 2024

Structural Control and Health Monitoring

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Timely wear evaluation is crucial in maintaining the functionality of bridge expansion joints (BEJs), ultimately ensuring the safety of bridges. Despite the significance of traffic load simulation (TLS) in simulation-based evaluation methods, existing TLS approaches face challenges in accurately modeling in situ traffic flow at a high fidelity. This paper presents a novel methodology and its application for evaluating the wear performance of BEJs, employing a Transformer-enhanced TLS approach. Initially, a tailored dataset is crafted for data-driven car-following modeling, leveraging an established spatial-temporal traffic load monitoring system. High-fidelity TLS with a mean absolute error (MAE) of 0.1738 m/s is then achieved using Transformer modules equipped with an attention mechanism. To evaluate the final wear life of BEJs, transient dynamic analysis and a calibrated finite element model of the bridge are employed to extract cumulative displacement. Additionally, a surrogate model is developed to depict the relationship between the hourly traffic weight on the entire bridge deck and the cumulative displacement of BEJs, yielding an impressive R-squared value of 0.96619. Comparative results demonstrate the superior performance of our proposed TLS approach over other data-driven approaches, with the linear model derived from our TLS approach outperforming the model generated by the conventional Monte Carlo-based TLS approach. To conclude, our proposed TLS emerges as a comprehensive and precise methodology for the wear evaluation of BEJs.

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“…Expansion joints on bridge not only have to allow for thermal, shrinkage and creep movements, they also have to bridge the gap on the road deck so that cars can safely drive over it. There are many creative methods to manage thermal expansion and the gap, however, short service life and costly maintenance are the most common concerns about the past proposed methods [10]- [12]. As shown in Figure 1, offset of deck slab and damage to joint seals, spalling and loss of steel armouring as well as low comfort to traffic are some common challenges of the existing expansion joint devices.…”

Section: Introductionmentioning

confidence: 99%

The first application of ultra‑high performance Concrete Link Slab in Malaysia

Tan,

Hafezolghorani,

Mohamed

et al. 2024

AEJ

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Conventional expansion joints in road bridges often suffer from issues like leakage, debonded seals, concrete damage, and short service life. To address these problems, a solution involving flexible link slabs using normal strength concrete (NSC) was proposed. While this method can enhance serviceability and reduce maintenance costs, it lacks durability and tensile strength. Recent interest has focused on cast-in-situ ultra-high performance concrete (UHPC) link slabs due to their exceptional mechanical properties, early strength, durability, ductility, and energy-absorption capabilities. However, there is limited information on their field implementation. To address this gap, a pilot UHPC link slab was designed and implemented to replace a damaged bituminous plug expansion joint in a Malaysian road bridge. The pilot link slab followed New York State Department of Transport (NYSDOT) guidelines and used a high early strength UHPC mix with minimal shrinkage through the combination of expansive agents and shrinkage-reducing admixture (SRA). Monitoring the project over two years has shown no performance concerns with the UHPC link slab. This paper provides a comprehensive overview of the construction process, along with experimental results on the mechanical properties and shrinkage characteristics of the new UHPC.

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Temperature Aging, Compression Recovery, Creep, and Weathering of a Foam Silicone Sealant for Bridge Expansion Joints

Cited by 17 publications

References 11 publications

Effect of Silicone Inlaid Materials on Reinforcing Compressive Strength of Weft-Knitted Spacer Fabric for Cushioning Applications

Effect of Silicone Inlaid Materials on Reinforcing Compressive Strength of Weft-Knitted Spacer Fabric for Cushioning Applications

Transformer‐Enhanced Traffic Load Simulation for Wear Evaluation of Bridge Expansion Joint

The first application of ultra‑high performance Concrete Link Slab in Malaysia

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