Evaluation of degradation and mechanical parameters and sustainability indicators of zeolite concretes

Lehner, Petr; Hrabová, Kristýna

doi:10.1016/j.conbuildmat.2023.130791

Cited by 14 publications

(6 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prestressed concrete bridges emerged as a prominent bridge type in China due to their inherent benefits, including substantial load-bearing capacity, expansive span capabilities, swift construction timelines, cost-effectiveness, and sustainability [1][2][3][4]. The concept of prestressed concrete structures involves the preliminary application of axial compressive forces to a structure to preemptively diminish or counteract tensile stresses induced by external loads prior to the structural elements experiencing such external forces.…”

Section: Introductionmentioning

confidence: 99%

Finite-Element Performance Degradation Behavior of a Suspension Prestressed Concrete Arch Bridge with Grouting Defects

Gong,

Sun,

Chen

et al. 2024

Buildings

View full text Add to dashboard Cite

In response to the difficulty in effectively dealing with grouting defects in corrugated pipes within a suspension prestressed concrete arch bridge, a method for assessing the deterioration in the performance of prestressed concrete girders afflicted with grouting defects was established in the present study. Specifically, a time-varying model of steel strand corrosion within grouting defects was constructed by investigating the corrosion theory of steel strands. In addition, a full-scale numerical simulation model of the long-span prestressed concrete bridge was established based on a practical project. Through the described means, the long-term impact of steel strand corrosion at various locations, lengths, and quantities on the vertical displacement and axial stress of girders was elucidated. The results reveal that in the presence of corrosion affecting 16 steel strands located in the midspan bottom plate, a vertical displacement alteration of 17.55 mm was observed in the midpoint region of the girder over a 30-year period following the bridge’s construction. Further, when considering the combined effects of concrete shrinkage, creep, and the corrosion of 16 steel strands in the midspan bottom plate, the axial compressive stress within the midpoint region of the girder decreased from an initial 6.30 MPa to 0.79 MPa over the same 30-year timeframe post-construction. It was observed that two indicators of vertical displacement and axial stress can be employed to evaluate the performance degradation of prestressed concrete bridge girders with grouting defects. The present findings may provide a reference for the operation and management of bridges with grouting defects.

show abstract

Section: Introductionmentioning

confidence: 99%

Finite-Element Performance Degradation Behavior of a Suspension Prestressed Concrete Arch Bridge with Grouting Defects

Gong,

Sun,

Chen

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…Zeolites are widely used as ion exchangers for water purification (Jedla et al., 2022; Khadem et al., 2022), catalysts (Clemente et al., 2019; Gao et al., 2023; Gonzalez Martinez, 2020), detergents formulation (Koohsaryan et al., 2020; Yusriadi et al., 2020), nuclear waste entrapment (Escamilla‐Pérez et al., 2023; Li et al., 2022; Murukutti & Jena, 2022), building materials (Kaplan et al., 2021; Lehner & Hrabová, 2023; Molinari et al., 2019), gas separation and purification (Cho et al., 2023; Qi et al., 2023; Zhang et al., 2023), among others. These materials can be found in nature or be synthesized by aluminium and silicon sources by alkaline activation.…”

Section: Introductionmentioning

confidence: 99%

Zeolites synthesized from agro‐industrial residues applied in agriculture: A review and future prospects

de Carvalho Izidoro,

Fungaro,

Cataldo

2023

Soil Use and Management

View full text Add to dashboard Cite

Zeolites have been widely applied as catalysts, wastewater treatment agents, gas adsorbents and fertilizers, among others. However, the use of natural zeolites or those synthesized from oversaturated commercial solutions are more explored commercially than the zeolites synthesized from residues. Therefore, the aim of this review is to highlight the importance of zeolites synthesized from agro‐industrial residues and their use in agriculture. This review has been divided into three different sections, that is, zeolites, agriculture applications, synthesis of zeolites from residues and their application in plant growth. In the first section, the definition, types and the critical properties of zeolites are explained. The second section gives a brief review of the application of zeolites in agriculture. Finally, the synthesis of zeolites from residues, such as coal ash, rice husk ash and sugarcane ash, with special attention to renewable sources is presented. The optimization of the synthesis of zeolites from residues with the incorporation of specific nutrients necessary for the cultivation of soybeans, corn and sugarcane (considered the most significant crops in Brazilian agriculture in terms of the planted area) can significantly contribute to the concept of circular economy at the industries and the fulfilment of sustainable development objectives, especially, the number 12 (SDO—12—Responsible consumption and production).

show abstract

“…The contaminant cycle process of the MSSW is introduced in Figure 1. In order to accomplish the target of high-quality development of material-environment-economy, prominent scholars at home and abroad have carried out the research wave of manufacturing concrete with high performance, low carbon emissions [9,10], and hoisting the utilization rate of MSSW. At present, FA has been extensively applied in goaf, roadbed backfilling, and other fields because there are no rigorous standard for the particle size and chemical compositions [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigating on the Pavement Performance of Multi-Source Solid Wastes by Cement and Fly Ash

Shan,

Li,

Zhao

et al. 2023

Materials

View full text Add to dashboard Cite

In order to advance the utilization rate of multi-source solid wastes in the Ningxia region of China, 16 groups of pavement base mixtures were designed with cement and fly ash (FA) as binders, steel slag (SS), silicon manganese slag (SMS), and recycled crushed stone (RCS) as composite aggregates. The evolution laws of mechanical and frost resistance properties of the mixture were investigated by unconfined compressive strength (UCS), indirect tensile strength (ITS), freeze–thaw (FT), and ultrasonic detection tests. Then, the strength formation mechanisms were revealed by microscopic characterization technology. The mathematical models between UCS-ITS, UCS-ultrasonic amplitude, FT cycles-UCS damage, and frost resistance coefficient-relative dynamic elastic modulus Er were established. The results show that cement content and curing age exhibited a positive effect on the mechanical strength and frost resistance of the mixture. When the replacement rate of SS was 60%, the mechanical strength and frost resistance were preferable. The R2 of the strength relationship models constructed was greater than 0.9, indicating high fitting accuracy. With the extension of the curing age, the cementitious products such as C-S-H (hydrated calcium silicate) and AFt (ettringite) developed entirely, and they were interlocked and cemented with each other, resulting in the micro-morphology developed from the three-dimensional network structure to the dense system. The macroscopic behavior incarnated that the mechanical strength and frost resistance of the mixture were significantly enhanced.

show abstract

Evaluation of degradation and mechanical parameters and sustainability indicators of zeolite concretes

Cited by 14 publications

References 31 publications

Finite-Element Performance Degradation Behavior of a Suspension Prestressed Concrete Arch Bridge with Grouting Defects

Finite-Element Performance Degradation Behavior of a Suspension Prestressed Concrete Arch Bridge with Grouting Defects

Zeolites synthesized from agro‐industrial residues applied in agriculture: A review and future prospects

Investigating on the Pavement Performance of Multi-Source Solid Wastes by Cement and Fly Ash

Contact Info

Product

Resources

About