Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar

Wu, Chaoguang; Chen, Zhiya; Zhang, Xuemin; Li, Zikun; Wang, Lichuan; Ouyang, Bin; Liu, Jin

doi:10.3390/ma16206819

Cited by 5 publications

(1 citation statement)

References 22 publications

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“…With the development and implementation of underground engineering, the characteristics of high ground stress, extremely broken surrounding rock and extralarge sections are becoming increasingly common, and the support of surrounding rock is also facing severe challenges [5][6][7]. Currently, prestressed anchor bolts are widely used as critical active support systems in different types of building structures involving high stresses and fractured surrounding rocks [8].…”

Section: Introductionmentioning

confidence: 99%

Design of Rc Structures of Medium-Rise Apartment Complex on Significantly Sloped Terrain in Montenegro

Marković,

Velimirović,

Stojković

2024

ZRGAF

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Design of structures in medium or extremely sloped terrains is a demanding and challenging engineering task. Depending on the depth of foundations of the future buildings, different methods of securing foundation pit sides are used. Extremely high vertical excavations cannot utilize the standard methods of securing ground stability (use of “L” segments) so somewhat more complicated and demanding solutions must be found. This paper shows the method of temporary securing of the vertical excavation during the building construction, using the prestressed geotechnical anchors in combination with the RC frame, on the example of the Apartment complex in Montenegro.

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Section: Introductionmentioning

confidence: 99%

Design of Rc Structures of Medium-Rise Apartment Complex on Significantly Sloped Terrain in Montenegro

Marković,

Velimirović,

Stojković

2024

ZRGAF

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Damage and restoration technology of historic buildings of brick and wood structures: a review

Hao,

Yao,

et al. 2024

Herit Sci

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Historical buildings carry the key technologies and practical values throughout the development of architectural heritage. Investigating the restoration techniques for historical buildings under various forms of damage is an essential step in the conservation and utilization of these structures. Utilizing Web of Science (WOS) and China National Knowledge Infrastructure (CNKI) as the primary databases, this study employs the PRISMA methodology to search and screen relevant research literature. A comprehensive review of the retained literature is conducted, analyzing publication trends, co-citation networks of authors and keywords, among other characteristics. To enhance the visibility of restoration techniques, three-dimensional modeling diagrams are created using actual case information of material or component damage as a reference, thereby increasing the referential value of the review content on historical building restoration techniques. The study provides a thorough review of over 30 restoration techniques corresponding to 9 types of damage from the perspectives of historical building walls and wooden components. Additionally, new materials or technologies mentioned in the retrieved literature are categorized; for instance, in the context of moisture-proof treatment for brick masonry, traditional methods are explained, and new research on electrochemical desalination and lipid-based waterproof materials is discussed and evaluated. Finally, given the multifaceted value and the variable mechanisms of damage in historical buildings, an analysis of the restoration process and techniques reveals that the restoration of historical buildings is a complex interdisciplinary process. The development and implementation of restoration plans should adhere to the principles of cultural relic protection to ensure their reasonableness and effectiveness, while also considering sustainability and environmental adaptability to protect and reuse historical buildings, thus leveraging their cultural and historical values. Moreover, the advancement of restoration techniques for historical buildings in the future should be based on the inheritance of traditional craftsmanship and materials, while also integrating new technologies, materials, and concepts to enhance the applicability and efficiency of traditional techniques.

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Sustainable Reinforcement: Exploring Hypo Sludge and Sisal Fiber Integration in M25 Grade Concrete for Eco-Friendly Solutions and Assessing Environmental Impact

2024

Preprint

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This study investigates the improvement of mechanical strength in M25 grade concrete through the incorporation of Hypo sludge and the addition of 2% novel sisal fiber, comparing the results with conventional concrete. Hypo sludge, a paper industry waste, serves as a supplementary cementitious material, contributing to sustainability. The novel sisal fiber, chosen for its unique properties, aims to enhance the concrete's compressive and flexural strength. Results indicate a significant improvement in compressive strength, with a simultaneous reduction in permeability and increased resistance to environmental factors. The incorporation of Hypo sludge and novel sisal fiber contributed to the formation of a denser and more durable concrete matrix. Durability tests, including freeze-thaw resistance and chloride ion penetration, revealed superior performance compared to conventional concrete. The mean compressive strength for Conventional Concrete (CC) was 33.98 N/mm², whereas Hypo sludge Concrete (HSC) exhibited a higher mean of 37.46 N/mm². The highest mean compressive strength was observed in Hypo sludge + Sisal Fiber Concrete (HSFC) at 40.18 N/mm², achieved with an optimal combination of 30% Hypo sludge and 2% novel sisal fiber. In terms of flexural strength, CC had a mean of 3.79 N/mm², Hypo sludge Concrete HSC showed an increased mean of 4.47 N/mm², and Hypo sludge + Sisal Fiber Concrete HSFC demonstrated the highest mean at 5.79 N/mm², with the optimum blend of 30% Hypo sludge and 2% novel sisal fiber contributing to this enhanced performance. Additionally, the mean durability values were 29.72 for CC, 32.42 for HSC, and the highest at 35.56 for HSFC with the optimized mixture. The result, denoted by Mauchly's W statistic, indicates no significant departure from sphericity (W = 0.806, Approx. Chi-Square = 3.459, df = 2, p = 0.177). These results underscore the positive impact of the optimal combination of 30% Hypo sludge and 2% novel sisal fiber on both mechanical and durability properties in M25 grade concrete. This research contributes to the evolving field of eco-friendly construction practices and novel material applications in concrete engineering.

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Performance of the Cement Grouting Material and Optimization of the Mix Proportion for the Free Section of the Prestressed Anchor Bar

Cited by 5 publications

References 22 publications

Design of Rc Structures of Medium-Rise Apartment Complex on Significantly Sloped Terrain in Montenegro

Design of Rc Structures of Medium-Rise Apartment Complex on Significantly Sloped Terrain in Montenegro

Damage and restoration technology of historic buildings of brick and wood structures: a review

Sustainable Reinforcement: Exploring Hypo Sludge and Sisal Fiber Integration in M25 Grade Concrete for Eco-Friendly Solutions and Assessing Environmental Impact

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