High-volume natural volcanic pozzolan and limestone powder as partial replacements for portland cement in self-compacting and sustainable concrete

By K. Celik, M. Jackson, M. Mancio, C. Meral, Abdul-Hamid Emwas, P. K. Mehta, Paulo J. M. Monteiro. 2014

311 citations recorded by the source corpus.

A laboratory study demonstrates that high volume, 45% by mass replacement of portland cement (OPC) with 30% finely-ground basaltic ash from Saudi Arabia (NP) and 15% limestone powder (LS) produces concrete with good workability, high 28-day compressive strength (39 MPa), excellent one year strength (57 MPa), and very high resistance to chloride penetration. Conventional OPC is produced by intergrinding 95% portland clinker and 5% gypsum, and its clinker factor (CF) thus equals 0.95. With 30% NP and 15% LS portland clinker replacement, the CF of the blended ternary PC equals 0.52 so that 48% CO2 emissions could be avoided, while enhancing strength development and durability in the resulting self-compacting concrete (SCC). Petrographic and scanning electron microscopy (SEM) investigations of the crushed NP and finely-ground NP in the concretes provide new insights into the heterogeneous fine-scale cementitious hydration products associated with basaltic ash-portland cement reactions.

Subfields: Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/88e2b03c8e1bd0cbe7d892ff4dce38c648b95b00

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In Civil and Structural Engineering

Citations in the corpus

Phillipsite and Al-tobermorite mineral cements produced through low-temperature water-rock reactions in Roman marine concrete (2017, methodology): “…Roman engineers had identified the unconsolidated pumiceous ash deposits, or pozzolana , as the optimum aggregate ( pulvis ) for maritime concrete harbor mortars; they used lithified zeolitized tuff deposits as coarse aggregate ( caementa ) in the concrete (Stanislao et al. 2011; Jackson 2014).”
Utilization of By-Products and Wastes as Supplementary Cementitious Materials in Structural Mortar for Sustainable Construction (2020, background): “The production of each metric ton of Portland cement requires about 4–5 GJ of energy [4,5].”
Assessing, Understanding and Unlocking Supplementary Cementitious Materials (2016, methodology): “Activation by grinding is commonly applied to condition SCMs [46, 47].”
Durability and strength characteristics of high-strength concrete incorporated with volcanic pumice powder and polypropylene fibers (2020, background): “Research has suggested that locally available pozzolanic material has potential for the production of durable and sustainable concrete [31,32].”
Green concrete containing diatomaceous earth and limestone: Workability, mechanical properties, and life-cycle assessment (2019, background): “…low Global Warming Potential (GWP) per compressive strength (Celik et al., 2015) (Gursel et al., 2016), strength gain of concretes with high-volume of SCMs can be impractically slow (strength at least 30% lower than plain cement concrete at 28 days) (Celik et al., 2014a) (Celik et al., 2014b).”