ECOncrete Technologies: Bio-Enhanced Concrete for Coastal and Marine Infrastructure

Sella, Ido; Perkol-Finkel, Shimrit; Rella, Andrew

doi:10.1680/cmsb.63174.0549

Cited by 6 publications

(6 citation statements)

References 8 publications

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“…The specific mix cannot be related to a specific antifer. Concrete properties at the age of 28 as reported in [22] are given in Table 2. Five cores, 95.1 mm in diameter, were drilled out of a 6-year-old breakwater antifer located on the coast of Haifa, Israel at a depth of 9 m (Figure 2).…”

Section: Methodsmentioning

confidence: 99%

Six-Year-Old Ecological Concrete in a Marine Environment: A Case Study

Kenny,

Ofer Rozovsky

2023

Sustainability

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The durability of ecological concrete in a marine environment is of concern for the coastal and offshore construction industry. The properties of such concrete taken from a marine structure were studied. Specimens of six-year-old submerged ecological concrete were taken from a breakwater located in the East Mediterranean Sea. The specimens were analyzed for their biological carbonate deposition cover, chloride effective diffusion, carbonation, compressive strength, and mineralogy. About 57% of the surface was found to be covered by biogenic-deposited carbonates. The effective chloride diffusion coefficient and the carbonation rate were found to be reduced proportionally to the biogenic-carbonate cover, relative to the prediction by a standard model. No significant change in compressive strength was detected. Most of the aluminates were found in non-crystalline minerals. No evidence of a sulfate attack was found. In conclusion, the effect of the biological growth on the concrete surface is mainly a reduction of effective diffusion, and no negative effects were detected.

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Section: Methodsmentioning

confidence: 99%

Six-Year-Old Ecological Concrete in a Marine Environment: A Case Study

Kenny,

Ofer Rozovsky

2023

Sustainability

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“…Given limitations surrounding use of shell substrate, a diversity of natural and artificial substrates are now being applied to oyster reef restoration (Goelz et al, 2020). These include, but are not limited to: other bivalve shells (e.g., scallop shells, surf clams), crushed limestone or rock, standard concrete (e.g., oyster castles), concrete with various additives often aimed at lowering pH or resource consumption during manufacture (e.g., Econcrete, Sella et al, 2018;Reefcrete;Dennis et al, 2018) and biodegradable products such as BESE-elements, a zigzag mesh constructed of a potato waste polymer that can be layered to produce a high surface-area structure with protective microhabitat (Herbert et al, 2018;Temmink et al, 2020). These substrates vary in material type and structural attributes, which interact with environmental factors to determine oyster reef development, growth and ecosystem service provision.…”

Section: Substratementioning

confidence: 99%

Contemporary Oyster Reef Restoration: Responding to a Changing World

Howie

Bishop

2021

Front. Ecol. Evol.

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Globally, there is growing interest in restoring previously widespread oyster reefs to reinstate key ecosystem services such as shoreline protection, fisheries productivity and water filtration. Yet, since peak expiration of oysters in the 1800s, significant and ongoing environmental change has occurred. Estuaries and coasts are undergoing some of the highest rates of urbanization, warming and ocean acidification on the planet, necessitating novel approaches to restoration. Here, we review key design considerations for oyster reef restoration projects that maximize the probability that they will meet biological and socio-economic goals not only under present-day conditions, but into the future. This includes selection of sites, and where required, substrates and oyster species and genotypes for seeding, not only on the basis of their present and future suitability in supporting oyster survival, growth and reproduction, but also based on their match to specific goals of ecosystem service delivery. Based on this review, we provide a road map of design considerations to maximize the success of future restoration projects.

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“…Whether the chemistry of the concrete itself has an effect on the benthic diversity is not clear. In one study, concrete mixture designs including alumina-rich cement blends and slag-based cement with different pozzolans were tested and monitored after 3, 6, 12 and 24 months for their biodiversity [99,100]. The tested matrices had about 10 -20% higher marine fouling communities cover than standard Portland cement matrices [99].…”

Section: Ecological Considerationsmentioning

confidence: 99%

“…Moreover, mobile invertebrates and resident fish species were clearly enhanced through design aspects (holes and crevices) of the bio-enhanced panels [107]. While modification of existing concrete should be done with caution, it stands to reason that careful modification of the concrete surface would result in increasing the benthic diversity of seawalls [100,107,108].…”

Section: Ecological Considerationsmentioning

confidence: 99%

Concrete Seawalls: Load Considerations, Ecological Performance, Durability, and Recent Innovations

Hosseinzadeh¹,

Ghiasian²,

Andiroglu³

et al. 2021

Preprint

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Increasing frequency of extreme weather events, driven by climate change, has resulted in an increasing demand for coastal structures to protect and stabilize shorelines. Concrete seawalls are a common category of coastal protection structures, designed with the primary objectives of absorbing wave action, preventing coastline erosion, and alleviating flooding. Much research has been carried out on improving the seawall performance. This work is a review of the current state-of-the-art in concrete seawalls focusing on design aspects including wave loading and innovative seawall designs, ecological considerations, and durability aspects. Wave loads on seawalls have received significant attention; however, their quantification remains a challenging task especially for novel designs. Drawing inspiration from natural shorelines, modification of surface complexity at a multitude of scales can improve the otherwise poor ecological performance of seawalls. The corrosion of the steel is a major durability concern, and the use of non-corrosive reinforcement can increase seawall durability towards corrosion. Examples of innovative seawall designs and systems which have the capability to outperform conventional seawalls are discussed. Advances in structural design, ecological engineering, and infrastructure materials science will drive the development of multi-functional seawalls which are sustainable, durable, and resilient.

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ECOncrete Technologies: Bio-Enhanced Concrete for Coastal and Marine Infrastructure

Cited by 6 publications

References 8 publications

Six-Year-Old Ecological Concrete in a Marine Environment: A Case Study

Six-Year-Old Ecological Concrete in a Marine Environment: A Case Study

Contemporary Oyster Reef Restoration: Responding to a Changing World

Concrete Seawalls: Load Considerations, Ecological Performance, Durability, and Recent Innovations

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