Experimental investigation on the preparation and surface treatment of biomass fibers for stone mastic asphalt mixtures modification

Wang, Jiaqing; Xiong, Yukang; Li, Qiang; Jin, Dongzhan; Hu, Yueyang; Che, Tiankai

doi:10.1016/j.conbuildmat.2023.133667

Cited by 4 publications

(4 citation statements)

References 39 publications

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“…Additionally, hydrophilic groups combine with water molecules [33][34][35], resulting in cement particles and water sharing similar groups. This interaction between identical groups provides a lubricating effect among cement particles, while the hydrophilic end of the xylonic acid molecule interacts with water, reducing surface tension [37][38][39]. Consequently, water molecules diffuse and disperse more effectively in the concrete mixture, improving the fluidity of the cement slurry and acting as a water-reducing agent.…”

Section: Microscopic Characterizationmentioning

confidence: 99%

The Mechanical Properties and Water-Reducing and Retarding Mechanism of a Xylonic Cement Admixture

Han,

Huang,

Wei

et al. 2023

Materials

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This study explores the mechanical properties, as well as the water-reducing and setting delay mechanism, of a novel xylonic acid-based water reducer applied to cementitious materials. Four xylonic acid water reducers were synthesized in this study: XACa (PX) from pure xylose, XACa (HS) from hemicellulose hydrolysate, XANa (PX) from pure xylose, and XANa (HS) from hemicellulose hydrolysate. These were generated through the whole-cell catalysis of Gluconobacter oxydans bacteria, using pure xylose and hemicellulose hydrolysate as substrates. The findings indicate that the xylonic acid-based water reducer can attain a water-reducing capability between 14% and 16% when the dosage (expressed as a mass fraction of cement) is roughly 0.2%. In initial and final setting tests, XACa (PX) demonstrated a pronounced retarding influence at admixture levels below 0.15%, reaching its apex at 0.10%. This delayed the initial setting time by 76% and the final setting time by 136% relative to the control group. However, a slight pro-setting effect was noted beyond a 0.2% dosage. In the compressive and flexural tests of concrete, under the same slump, the XA group improved its mechanical properties by 5% to 10% compared to the SodiuM lignosulfonate (SL) group. In the air content and chloride ion migration resistance tests, the XA group reduced the air content by 38% compared to the SL group, but also increased the data of rapid chloride migration (DRCM) by 16%. Characterization studies revealed that the carboxyl and hydroxyl groups in xylonic acid undergo chemisorption with the Si-O bonds on the surface of cement particles. These groups interact with the Si-O bonds on cement particles, contributing to water-reducing effects and delaying the setting process by impeding Ca2+ ion aggregation in the calcium-silicate-hydrate gel. Its significant water-reducing effect, adjustable setting time, and excellent mechanical and durability properties suggest its viability as an alternative to lignosulfonate series water-reducing agents.

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Section: Microscopic Characterizationmentioning

confidence: 99%

The Mechanical Properties and Water-Reducing and Retarding Mechanism of a Xylonic Cement Admixture

Han,

Huang,

Wei

et al. 2023

Materials

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“…For the bonding method, high-performance bonding materials are employed to affix the FRP material onto the surface of the base material, allowing both to distribute the force. On the other hand, the bolt connection method utilizes bolts to establish a connection between the FRP and the base structure, resulting in the FRP material being secured together with the structure as a whole [14][15][16][17][18]. For actual reinforcement, considering the low durability and high-temperature sensitivity of the bonding material and the fragility of the interface, the bolted connection method can be regarded as a significant practical and competitive reinforcement method.…”

Section: Introductionmentioning

confidence: 99%

Repairing Behaviors of Cracked Steel Plates Based on Bolted Fiber-Reinforced Polymer Plates

Liu,

Wang,

Wei

et al. 2023

Materials

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The use of FRP materials to repair cracked/damaged steel structures has gradually been adopted by researchers. This paper investigates the repairing effect of bolted FRP plates for cracked steel plates based on experimental and numerical simulation methods. In the experimental investigation, the tensile strengths of six specimens, including three repaired specimens and three pure cracked steel specimens, were evaluated. The test outcomes indicated that the bolt repairing method significantly enhanced the tensile strengths of the cracked steel plates. As an example, the failure of a pure steel plate with a 1 mm width crack occurred at 813 N, whereas after being repaired, a tensile strength of 1298 N was observed. Based on finite element (FE) analysis, the influence of bolt preloads and interfacial friction coefficients were verified. The stress-relative ratio for specimens was contingent on the bolt preload magnitude and gradually decreased as the preload was augmented. By exploring the repairing effect for varied friction coefficients, it was concluded that using a higher bolt preload can aid in eliminating the performance discrepancy of the overall component caused by interface treatment errors.

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“…Road performance has always been a concern (Wang et al, 2022;Wang et al, 2023), and asphalt roads are an important part of it. Asphalt mixture is a kind of black material which is highly absorbing solar radiation (Cheng et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Layer combination design and effect evaluation of phase change cooling asphalt pavement

Huang,

Fan,

et al. 2023

Front. Mater.

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Asphalt mixture is a temperature sensitive material. With the change of external environment temperature, asphalt pavement is prone to temperature-related diseases. Adding phase change material (PCM) to asphalt pavement to adjust pavement temperature is one of the effective methods at present. At present, there are many types of research on PCMs, but the research on PCMs added to the pavement structure is very scarce. In this paper, through the temperature test of rutting plate specimens with different layer combinations, the cooling effect of pavement structure combinations with PCMs added to different layers (upper layer, middle layer, and bottom layer) in pavement structure under different illumination times are discussed. Through the self-designed environmental simulation box, the real-time monitoring of the temperature of different layers in the pavement structure is realized. The cooling effect between different layers in different phase change pavement structure combinations is analyzed, and compared with each layer of ordinary pavement structure, and the best addition method is obtained for phase change materials, which provides a certain reference for the construction and specific application of PCM asphalt pavement, and made important contributions to the development of asphalt cooling pavement. The results show that the PCM can effectively reduce the temperature of each layer of the pavement structure. Under different illumination durations, the cooling effect of the samples with PCM in the upper layer was the worst. The samples with phase change material in the middle layer had the best cooling effect in the upper and middle layers of the pavement. The addition of phase change material to both the upper and middle layers had the most obvious cooling effect on the lower layer of the pavement. Therefore, combined with the comprehensive consideration of economy and cooling effect, the comprehensive cooling effect of adding PCMs to the middle surface layer is the best. It is recommended to add phase change materials to the middle surface layer during asphalt cooling pavement construction.

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Experimental investigation on the preparation and surface treatment of biomass fibers for stone mastic asphalt mixtures modification

Cited by 4 publications

References 39 publications

The Mechanical Properties and Water-Reducing and Retarding Mechanism of a Xylonic Cement Admixture

The Mechanical Properties and Water-Reducing and Retarding Mechanism of a Xylonic Cement Admixture

Repairing Behaviors of Cracked Steel Plates Based on Bolted Fiber-Reinforced Polymer Plates

Layer combination design and effect evaluation of phase change cooling asphalt pavement

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