Performance of field-aged polymeric spray lining for water pipe rehabilitation

Azoor, Rukshan; Shannon, Benjamin; Fu, Guoyang; Deo, Ravin N.; Kodikara, Jayantha

doi:10.1016/j.tust.2021.104116

Cited by 10 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spray repair, in contrast to traditional excavation methods, presents the advantages of reduced overall costs, shorter construction durations, and minimal environmental impact, rendering it a widely favored approach for pipeline restoration. [7][8][9] During the spray repair process for underground water supply pipelines, it is imperative to ensure that the sprayed material can rapidly solidify, ensuring adequate bonding strength and close adhesion to the inner pipeline wall. Furthermore, the material must meet the long-term operational demands of the pipeline in terms of fundamental mechanical properties and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the repair of deteriorating and aging water supply pipelines becomes imperative. Spray repair, in contrast to traditional excavation methods, presents the advantages of reduced overall costs, shorter construction durations, and minimal environmental impact, rendering it a widely favored approach for pipeline restoration 7–9 . During the spray repair process for underground water supply pipelines, it is imperative to ensure that the sprayed material can rapidly solidify, ensuring adequate bonding strength and close adhesion to the inner pipeline wall.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The development of high‐strength, anticorrosive, and strongly adhesive polyaspartate polyurea coating suitable for pipeline spray repairs

Wang,

Du,

Fang

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

This study synthesized polydimethylsiloxane (PDMS)‐modified polyaspartate polyurea (PPPU) with different ratios, considering the practical performance requirements of underground water supply pipeline spray repair materials. The successful synthesis of PPPU was confirmed using Fourier transform infrared spectrometer (FTIR) spectroscopy. The influence of the ratio of the two components and the content of ‐aminopropyl terminated polydimethylsiloxane (APT‐PDMS) on the drying time and tensile performance of PPPU coatings was evaluated. Based on this evaluation, a superior ratio for PPPU coatings was proposed. Subsequently, the bonding performance, hydrophobicity, and corrosion resistance of PPPU coatings at the superior ratio were tested. The results indicate that as the mass ratio of polyaspartic acid ester to hexamethylene diisocyanate trimer increases, both the drying time and tensile strength of the coating decrease. The addition of APT‐PDMS results in a decrease in the tensile strength of PPPU, but an increase in its elongation at break. The peak value of elongation at break is achieved when the APT‐PDMS content is 5%, making the PPPU2‐1‐5 coating the superior ratio for spray application on water supply pipelines. Through experiments, it was determined that the bonding strength of the PPPU2‐1‐5 coating with cement mortar under dry and humid conditions, static water contact angle (93.4°), and corrosion resistance performance are superior to those of the unmodified polyurea coating, demonstrating its application advantages. The conclusions drawn in this study provide a theoretical foundation for the practical engineering application of PPPU.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The development of high‐strength, anticorrosive, and strongly adhesive polyaspartate polyurea coating suitable for pipeline spray repairs

Wang,

Du,

Fang

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The results indicate that the grouting void reduces the pressure capacity and should be avoided in engineering practice. Azoor et al 21 presented results from a test intended to evaluate the performance of actual inservice, spray-lined pipes extracted from the field. The material property of the liner was tested, and the results found that the repaired pipes were able to withstand operational pressures with circular through-wall holes.…”

Section: Introductionmentioning

confidence: 99%

“…The results indicate that the grouting void reduces the pressure capacity and should be avoided in engineering practice. Azoor et al 21 . presented results from a test intended to evaluate the performance of actual in‐service, spray‐lined pipes extracted from the field.…”

Section: Introductionmentioning

confidence: 99%

Mechanical response of concrete pipe rehabilitated by liner under external load: Analytical solution

Zhai,

Fang,

Wang

et al. 2023

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

Using pipe lines to rehabilitate concrete drainage pipes is a popular trenchless technique. In this paper, the concrete pipe and liner are equivalent to a symmetrical structural mechanics problem, and the mechanical solution of the composite structure is obtained using the force method. Subsequently, the analytical solutions are compared with the test and finite element results. The distribution law of axial force, bending moment, and shear force of the composite structure are obtained, and the circumferential strain law of the inner and outer surfaces of the host pipe is analyzed. Lastly, the influence of pipe diameter and liner thickness on the bearing capacity of the host pipe is examined. The results indicate that the axial and shear force distribution of the composite structure remains the same for different pipe diameters, as the distribution diagrams of shear and axial force along the circumferential direction coincide. While the elastic modulus and thickness of the liner have no effect on the internal force distribution of the composite structure, they do directly affect the stress state of the host pipe. Additionally, the bottom support causes abrupt changes in the bending moments and strains of the host pipe.

show abstract

“…This is exacerbated by ageing assets and hence timely monitoring of them is essential for identifying faults and determining the most effective ways of renewal [4]. CIPP (Cured in Place Pipe) [5] or spray techniques [6] are widely utilized in the "lining" process, which is a popular form of renewal. Despite the fact that a variety of robotic technologies are available for the condition assessment of host pipes [7], [8], they do not provide critical information about the quality of the liners and their long-term performance.…”

Section: Introductionmentioning

confidence: 99%

Battery-Free UHF-RFID Sensors-Based SLAM for In-Pipe Robot Perception

2022

View full text Add to dashboard Cite

Water utilities across the globe are concerned with the inspection and replacement of buried metallic water pipes due to corrosion-related structural damages. Internal pipe linings are commonly used as a renewal method to improve structural strength as they are regarded to be a less expensive alternative to costly and time-consuming pipe replacements. However, linings are also prone to failure as well. Therefore, water authorities regularly monitor lining performance, where defect evolution over a long period of time is an important parameter to note. It requires an accurate in-pipe robot localization technology. In this article, we propose a novel method for in-pipe robot localization and tag mapping that uses battery-free UHF-RFID sensor wireless signals. It utilizes a signal mapping approach in combination with a tailored posegraph simultaneous localization and mapping algorithm. Evaluation results of a field-extracted pipe sample from Sydney Water's distribution network show the proposed approach is capable of localizing the robot within 2.5cm accuracy in a 50m equivalent pipe with an unknown UHF-RFID distribution. The proposed approach outperformed other reported similar work in the literature.

show abstract

Performance of field-aged polymeric spray lining for water pipe rehabilitation

Cited by 10 publications

References 6 publications

The development of high‐strength, anticorrosive, and strongly adhesive polyaspartate polyurea coating suitable for pipeline spray repairs

The development of high‐strength, anticorrosive, and strongly adhesive polyaspartate polyurea coating suitable for pipeline spray repairs

Mechanical response of concrete pipe rehabilitated by liner under external load: Analytical solution

Battery-Free UHF-RFID Sensors-Based SLAM for In-Pipe Robot Perception

Contact Info

Product

Resources

About