Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Solid state 29Si and 27Al NMR and FTIR study of cement pastes containing industrial wastes and organics
29.Si and 27.Al NMR and FTIR have been used to study the products of OPC hydration in the presence of a heavy metal containing stabilized waste which is commercially solidified, selected oraganics and pulverized fuel ash. 29.Si NMR unambiguously quantifies the extent of silicate polymerization, which is severly retarded in mixes containing the stabilized waste. 27.Al NMR spectroscopy indicates the presence of both ettringite and monosulfate in a cement containing 2 % of the stabilized waste, while only ettringite is detected in a spectra of samples with 19 and 30 % additions. Phenol and ethylamine also reduce silicate condensation, although a sample containing both the metal waste and mixed organics showed silicate condensation levels similar to those found in a normal OPC paste. It is difficult to draw firm conclusions from the FTIR results due to band overlap in the region of interest.
Solid state 29Si and 27Al NMR and FTIR study of cement pastes containing industrial wastes and organics
29.Si and 27.Al NMR and FTIR have been used to study the products of OPC hydration in the presence of a heavy metal containing stabilized waste which is commercially solidified, selected oraganics and pulverized fuel ash. 29.Si NMR unambiguously quantifies the extent of silicate polymerization, which is severly retarded in mixes containing the stabilized waste. 27.Al NMR spectroscopy indicates the presence of both ettringite and monosulfate in a cement containing 2 % of the stabilized waste, while only ettringite is detected in a spectra of samples with 19 and 30 % additions. Phenol and ethylamine also reduce silicate condensation, although a sample containing both the metal waste and mixed organics showed silicate condensation levels similar to those found in a normal OPC paste. It is difficult to draw firm conclusions from the FTIR results due to band overlap in the region of interest.
Solid state 29Si and 27Al NMR and FTIR study of cement pastes containing industrial wastes and organics
Festkörper-29.Si- und -27.Al-NMR und -FTIR-Studie von Industrieabfälle und organische Stoffe enthaltenden Zementpasten
Hanna, R.A. (Autor:in) / Barrie, P.J. (Autor:in) / Cheeseman, C.R. (Autor:in) / Hills, C.D. (Autor:in) / Buchler, P.M. (Autor:in) / Perry, R. (Autor:in)
Cement and Concrete Research ; 25 ; 1435-1444
1995
10 Seiten, 2 Bilder, 4 Tabellen, 21 Quellen
Aufsatz (Zeitschrift)
Englisch
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