A Review on Cement-Based Materials and Practices for Rehabilitation, Retrofitting, and Strengthening of Hydraulic Structures

Silva, João Conde; Serra, Carlos

doi:10.1061/(asce)sc.1943-5576.0000692

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…However, when E d is calculated, the materials' density plays a strong role and the dynamic elastic modulus of all the mortars is much lower compared to concrete (−49%, −32%, −46% for mortars A, B and C, respectively). This mismatch between the stiffness of the original and repair materials might decrease the structural effectiveness of the intervention, as the material with higher elastic modulus will proportionately be more overloaded (Conde Silva and Serra, 2022). This effect may be particularly significant when a large portion of concrete is demolished and repointed, to improve the corrosion behavior of the rebars.…”

Section: Effectiveness and Compatibility Of The Repair Mortarsmentioning

confidence: 99%

“…Due to the obsolescence of reinforced concrete, the market for these certified dry ready-mix repair mortars is expected to grow at a compound annual growth rate (CAGR) of more than 6% globally from 2023 to 2028 (Mordor Intelligence, 2024). Besides the requirements posed by EN 1504-3, some authors provided additional recommendations for repair mortars (Miranda et al, 2021;Conde Silva and Serra, 2022;Miranda et al, 2022), ranging from compatibility to effectiveness to durability, which points out how challenging the concrete repair by mortars is.…”

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confidence: 99%

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Onsite and laboratory assessment of repair mortars for reinforced concrete floor slabs in heritage buildings

Franzoni,

Pizzigatti

2024

Front. Mater.

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The conservation and repair of XX century architectural heritage built with reinforced concrete is becoming more and more important and requires suitable materials and technical solutions. In particular, effectiveness, compatibility and durability must be ensured, in spite of the limited extent of demolition allowed by the local authorities, and the literature in this field is still limited. In this paper, an experimental campaign was carried out in an historic reinforced concrete floor slab, where different repair mortars were used. After some on-site testing on the corrosion potential, the concrete beams of the slab were integrally cut and transported to the laboratory for a series of systematic tests, aimed at investigating the performance and compatibility of the repair materials, as well as any possible issues hindering the success of this structural intervention. The filling ability, physical compatibility, chemical compatibility and mechanical compatibility of the repair mortars and the corrosion behavior of the steel reinforcement were investigated, deriving some results of general interest, which may contribute to a better insight about the repair of heritage concrete floor slabs.

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Section: Effectiveness and Compatibility Of The Repair Mortarsmentioning

confidence: 99%

mentioning

confidence: 99%

Onsite and laboratory assessment of repair mortars for reinforced concrete floor slabs in heritage buildings

Franzoni,

Pizzigatti

2024

Front. Mater.

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“…If decent quality of concrete for recycling influences concrete properties, LPS buildings can make a significant contribution to the creation of durable eco-concrete and greater attention to the source of waste. Cement-based mortars and concrete have been successfully applied in retrofitting and strengthening structures [107]. Because no research proved this theory, there is urgent need for the evaluation of recycling concrete panels.…”

Section: The Amount Of Waste and Its Localizationmentioning

confidence: 99%

Large Panel System Technology in the Second Half of the Twentieth Century—Literature Review, Recycling Possibilities and Research Gaps

2022

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Large panel system (LPS) buildings, during the 1950s–1990s, were the most widespread among precast systems and are still a huge part of some national housing stocks. Disadvantages in characteristics, poor quality of all construction stages, sudden disasters and poor retrofit and repair techniques can result in demolishing some LPS buildings and thus the creation of huge amounts of waste. There is urgent need of evaluating the possibility of reusing the elements of LPS buildings. The novelty of the article is based on the formulation of research gaps in terms of recycling these buildings and the justification of such need. The authors reviewed the current state of knowledge regarding characteristics of LPS buildings, directions of retrofitting, durability and their locations within cities. The possibility of recycling elements of LPS buildings was analysed. The findings are that concrete load bearing panels, proved to be in satisfactory conditions in terms of strength and durability, have the possibility to be recycled into recycled coarse aggregate (RCA), so such waste could be beneficial for concrete. However, there are research gaps of such an application highlighted in the text. The authors suggest that conducting comprehensive basic research in this area could have significant benefits for the next generation of researchers and engineers.

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Repairing of web opened RC beam with ferrocement laminates using alkali activated mortar

Sinha

Talukdar

2023

J Build Rehabil

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A Review on Cement-Based Materials and Practices for Rehabilitation, Retrofitting, and Strengthening of Hydraulic Structures

Cited by 4 publications

References 11 publications

Onsite and laboratory assessment of repair mortars for reinforced concrete floor slabs in heritage buildings

Onsite and laboratory assessment of repair mortars for reinforced concrete floor slabs in heritage buildings

Large Panel System Technology in the Second Half of the Twentieth Century—Literature Review, Recycling Possibilities and Research Gaps

Repairing of web opened RC beam with ferrocement laminates using alkali activated mortar

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