![]() OSTI Identifier: 5656763 Resource Type: Journal Article Journal Name: J. Scawtite appears to be an inferior phase by itself, but in small quantities it can be helpful in strength development.Īuthors: Eilers, L H Moran, L K Nelson, E B Publication Date: Fri Jul 01 00:00: Research Org.: Dowell Div., Dow Chemical Co. The addition of carbonate to any of these formulations may produce scawtite. Once formed, pectolite is very stable but typically has high permeability. Pectolite can be produced by introducing sodium into a truscottite-type formulation. ![]() Truscottite, produced when an even larger quantity of silica is added to the cement, has lower permeability than xonotlite but is slightly more difficult to produce and to stabilize. Generally, it has good strength but moderate permeability. ![]() Xonotlite is a phase commonly produced above 150/sup 0/C (302/sup 0/F) when approximately 35% fine silica is added to Portland cement. The better cementing compositions contain a low lime-to-silica (C/S) ratio. The calcium silicate hydrate (CSH) gel is produced at low temperatures and, upon curing at higher temperatures, will convert to one or more crystalline phases. Aponte, D.F.The crystalline nature of hydrated Portland cement is dependent primarily on temperature. MATCAR - Materials de Construcció i CarreteresĪraos, P. Àrees temàtiques de la UPC::Enginyeria civil::Materials i estructures::Materials i estructures de formigóĮffects of the mineralogical composition and particle size distribution of ladle furnace slag as a cement/fine aggregate replacement in concrete Furthermore, the observed volumetric instability issues were within the Code on Structural Concrete (Spanish abbreviation: EHE) established limits (0.04%), suggesting that the remaining periclase could be responsible for this expansive behavior. Therefore, the weathering/maturity process mainly affects free CaO. LFS mineralogical characterization reveals the absence of free CaO and the presence of periclase with its hydration/carbonation products. Our results show reduced mechanical performance with LFS replacement, reaching compressive strength values of 32–42 MPa after 28 days. Chemical/mineralogical characterization of raw/hydrated samples, fresh-/hardened-state concrete properties, and volumetric instability tests were evaluated. ![]() This work examines the potential use of LFS as a partial cement/fine aggregate replacement, focusing on the effects of LFS composition and particle size distribution on concrete physico–mechanical properties. Despite this, landfills are typically its final destination, mainly because of technological barriers in its valorization process. Ladle furnace slag (LFS) shows excellent potential for valorization. "Materiales de construccion (Madrid)", 2023, vol. Effects of the mineralogical composition and particle size distribution of ladle furnace slag as a cement/fine aggregate replacement in concrete. Departament d'Enginyeria Civil i AmbientalĪraos, P.
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