Geomaterials as construction aggregates: a state-of-the-art

Přikryl, Richard

doi:10.1007/s10064-021-02488-9

Cited by 30 publications

(14 citation statements)

References 208 publications

(146 reference statements)

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“…Physical and chemical characteristics affect its suitability as a construction material and these properties are directly related to the quality of the source rock [5]. The geological features of aggregates impact their performance regardless of how they are utilized [6,7]. Folding, faulting, joints, hydrothermal alteration, and weathering are some of the geological processes that result in aggregate physico-mechanical properties [8].…”

Section: Introductionmentioning

confidence: 99%

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

et al. 2022

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The China-Pakistan Economic Corridor (CPEC) is a massive in-progress construction project in Pakistan that connects more than 70 countries via multiple trade channels such as highways, railways, roads, and fiber optics. This project also involves the development of local infrastructure and industrial zones in Pakistan, which demands the discovery of new resources of aggregate to facilitate the construction. Therefore, physical characterization research was carried out on the Kirman hill region (Jurassic limestone), District Kurram, Pakistan, to investigate their suitability for utilization as construction materials using site investigation and laboratory studies. The results outline that all typical engineering parameters are within acceptable limits set by international standards like BS, ASTM, and AASHTO. Bituminous tests revealed that Jurassic limestone is appropriate as an aggregate for asphalt wearing coarse. Likewise, the petrographic study performed shows proper matching with engineering tests. The petrographic analysis of Jurassic limestone showed a minute amount of deleterious content; as a result, it is resistant to Alkali silica reaction (ASR) and Alkali carbonate reaction (ACR) expansions. Based on engineering and petrographic analysis, the Jurassic limestone, Kirman hill region, District Kurram, Pakistan is recommended as a potential aggregate for (i.e., base course, subbase course, cement concrete, and asphalt) and other mega and minor civil construction projects. Doi: 10.28991/CEJ-2022-08-03-02 Full Text: PDF

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Section: Introductionmentioning

confidence: 99%

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

et al. 2022

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“…We combined all aggregates and other gravel from asphalt, concrete, downcycled materials and primary sand and gravel, with an asphalt composition of 95% aggregates and 5% bitumen [50] and a concrete composition of 83% aggregates and 17% cement [51]. Downcycled materials were separated into bricks, asphalt, and concrete with the same C content as the primary material (except for asphalt outgassing and concrete carbonation).…”

Section: Socio-economic Materials Stocksmentioning

confidence: 99%

“…We only considered coarse aggregates as source of C (62% of total aggregates based on average concrete mixtures [34,35]) and assumed zero C for fine aggregates (primarily sand). Because extraction and material composition of mined aggregates is very poorly reported [50,52], we only considered the main C-containing mineral, that is limestone. Limestone's share in excavated aggregates varies by region, and data are only available for a few countries (e.g.…”

Section: Socio-economic Materials Stocksmentioning

confidence: 99%

Society’s material stocks as carbon pool: an economy-wide quantification of global carbon stocks from 1900–2015

Kaufmann,

Wiedenhofer,

Cao

et al. 2024

Environ. Res. Lett.

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Societal activities massively alter the global carbon (C) cycle, thereby driving global climate heating. Socioeconomic material stocks – e.g., in buildings and infrastructures – have been identified as a C pool that can potentially store increasing amounts of C, thereby keeping C away from the atmosphere. However, little is known about the size, composition, distribution and development of global socioeconomic C stocks. Based on an established economy-wide C accounting approach from sociometabolic research, we consistently and comprehensively quantified the C contained in eight components of socioeconomic stocks in the period 1900-2015 at the level of nine world regions. We discern inert (aggregates & other gravel) and ‘active’ climate-relevant (i.e., biomass and fossil-fuel based) C pools. We find that global active components of socioeconomic C stocks grew by a factor of 9, from 1.9 (1.5-2.2) Pg of carbon (PgC) to 16.8 (13.7-20.2) PgC. The inert socioeconomic C stock in aggregates & other gravel amounted to 25.2 (6.1-48.0) PgC in 2015, however with high uncertainties. Absolute annual Net Additions to Stock (NAS) of active stock components was 0.49 (0.40-0.59) PgC/yr which equalled 5% of the C emissions from fossil fuel combustion and industrial processes. However, raising NAS of components with biomass feedstock that sequester C from the atmosphere comes with biodiversity and food security trade-offs. This study contributes to a holistic perspective on social and natural C stocks that acknowledges their interactions. The global socioeconomic C stock reached a geologically relevant extent (approximately the size of C in coasts) and should therefore be integrated in the assessments of the global C cycle to acknowledge the Anthropocene.

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“…Indeed, Geoscience is fundamental to human existence because the ordinary individual is constantly confronted with issues that are geological in nature in their everyday lives. Issues range from making decisions regarding the right earth materials to use for manufacturing and construction (Přikryl et al, 2016;Přikryl, 2021) to choosing an appropriate site for such projects (Leetsaar et al, 2021) and responding to and/or mitigating the effects of geohazards (Jones and Hobbs, 2021). In fact, modern-day comforts such as mobile phones, personal computers, cars, cables, makeup products, paints, batteries etc.…”

Section: Introductionmentioning

confidence: 99%

Geoscience education in Ghana: status and recommendations

2023

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This paper reviewed the level of Geoscience education in Ghana and offers recommendations for improvement. The review showed that Geoscience education in Ghana is inadequate and Geoscience literacy and awareness in the public are weak. Currently, the level of Geoscience content in the formal educational curricula of Basic and Senior High schools as well as colleges of education in Ghana is very low. In addition, out of 129 universities in Ghana, only seven offer Geoscience or Geoscience-related programs. To improve the level of formal Geoscience education we recommend the following: (1) introduce geoscience degree programs in colleges of education, (2) introduce Geoscience as a subject in the Senior High School curriculum, (3) improve the Geoscience content in the Basic School curriculum, (4) Encourage more universities to offer degree programs in Geoscience. To train the next generation of Geoscientists, we recommend improvements in Geoscience degree programs in terms of (1) the curriculum, content, proficiencies, and skills, (2) the use of pedagogy and technology, and (3) the preparation of teachers to build capacity in science and core geology. To help increase Geoscience awareness and literacy in Ghana, the Geoscience workforce should team up with relevant stakeholders to promote Geoscience outreach in Ghana.

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Geomaterials as construction aggregates: a state-of-the-art

Cited by 30 publications

References 208 publications

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

Resource Assessment of Limestone Based on Engineering and Petrographic Analysis

Society’s material stocks as carbon pool: an economy-wide quantification of global carbon stocks from 1900–2015

Geoscience education in Ghana: status and recommendations

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