Early Age Hydration and Pozzolanic Reaction in Natural Zeolite Blended Cements: Reaction Kinetics and Products by In Situ Synchrotron X-ray Powder Diffraction

The in situ early-age hydration and pozzolanic reaction in cements blended with natural zeolites were investigated by time-resolved synchrotron X-ray powder diffraction with Rietveld quantitative phase analysis. Chabazite and Na-, K-, and Ca-exchanged clinoptilolite materials were mixed with Portland cement in a 3:7 weight ratio and hydrated in situ at 40 {sup o}C. The evolution of phase contents showed that the addition of natural zeolites accelerates the onset of C{sub 3}S hydration and precipitation of CH and AFt. Kinetic analysis of the consumption of C{sub 3}S indicates that the enveloping C-S-H layer is thinner and/or less dense in the presence of alkali-exchanged clinoptilolite pozzolans. The zeolite pozzolanic activity is interpreted to depend on the zeolite exchangeable cation content and on the crystallinity. The addition of natural zeolites alters the structural evolution of the C-S-H product. Longer silicate chains and a lower C/S ratio are deduced from the evolution of the C-S-H b-cell parameter.

[1]  G. Artioli,et al.  Tricalcium aluminate hydration in additivated systems. A crystallographic study by SR-XRPD , 2008 .

[2]  R. W. Cheary,et al.  A fundamental parameters approach to X-ray line-profile fitting , 1992 .

[3]  The early hydration and the set of Portland cements: In situ X-ray powder diffraction studies , 2007, Powder Diffraction.

[4]  R. J. Hill,et al.  Quantitative phase analysis from neutron powder diffraction data using the Rietveld method , 1987 .

[5]  R. Sersale,et al.  Portland-zeolite-cement for minimizing alkali-aggregate expansion , 1987 .

[6]  Y. Filinchuk,et al.  A comparative structural study of wet and dried ettringite , 2010 .

[7]  F. Massazza,et al.  10 – Pozzolana and Pozzolanic Cements , 1998 .

[8]  Y. L. Page,et al.  Refinement of the crystal structure of low-quartz , 1976 .

[9]  B. Uzal,et al.  STUDIES ON BLENDED CEMENTS CONTAINING A HIGH VOLUME OF NATURAL POZZOLANS , 2003 .

[10]  M. A. Yurdusev,et al.  USE OF ZEOLITE, COAL BOTTOM ASH AND FLY ASH AS REPLACEMENT MATERIALS IN CEMENT PRODUCTION , 2004 .

[11]  Domenico Caputo,et al.  Some advances in understanding the pozzolanic activity of zeolites: The effect of zeolite structure , 2008 .

[12]  J. Hanson,et al.  Real time study of cement and clinker phases hydration , 2003 .

[13]  Gilles Mertens,et al.  Calorimetric evolution of the early pozzolanic reaction of natural zeolites , 2010 .

[14]  N ChanSY,et al.  高性能ゼオライト,シリカヒューム,及びPFAコンクリートの初期表面吸着及び塩化物拡散の比較研究 , 1999 .

[15]  H. Jagodzinski,et al.  Modulated structure of a plagioclase An52: Theory and structure determination , 1981 .

[16]  J. Hanson,et al.  Formation of ettringite, Ca6Al2(SO4)3(OH)12·26H2O, AFt, and monosulfate, Ca4Al2O6(SO4)·14H2O, AFm-14, in hydrothermal hydration of Portland cement and of calcium aluminum oxide—calcium sulfate dihydrate mixtures studied by in situ synchrotron X-ray powder diffraction , 2004 .

[17]  A. Chatterji,et al.  Hydration of Portland Cement , 1965, Nature.

[18]  D. Semmingsen,et al.  Neutron diffraction refinement of the structure of gypsum, CaSO4.2H2O , 1982 .

[19]  D. Bish,et al.  Clinoptilolite-Heulandite Nomenclature , 2001 .

[20]  N. Feng,et al.  APPLICATIONS OF NATURAL ZEOLITE TO CONSTRUCTION AND BUILDING MATERIALS IN CHINA , 2005 .

[21]  Sammy Chan,et al.  Comparative study of the initial surface absorption and chloride diffusion of high performance zeolite, silica fume and PFA concretes , 1999 .

[22]  Á. G. Torre,et al.  Rietveld quantitative amorphous content analysis , 2001 .

[23]  L. Lam,et al.  A study on the hydration rate of natural zeolite blended cement pastes , 1999 .

[24]  J. Jeffery,et al.  The crystal structure of tricalcium aluminate, Ca3Al2O6 , 1975 .

[25]  I. Richardson.  Tobermorite/jennite- and tobermorite/calcium hydroxide-based models for the structure of C-S-H: applicability to hardened pastes of tricalcium silicate, β-dicalcium silicate, Portland cement, and blends of Portland cement with blast-furnace slag, metakaolin, or silica fume , 2004 .

[26]  C. Colella,et al.  Use of Zeolitic Tuff in the Building Industry , 2001 .

[27]  Duncan Herfort,et al.  Sustainable Development and Climate Change Initiatives , 2008 .

[28]  S. Geller,et al.  The crystal structure of brownmillerite, Ca2FeAlO5 , 1971 .

[29]  Á. G. Torre,et al.  Phase development in conventional and active belite cement pastes by Rietveld analysis and chemical constraints , 2009 .

[30]  P. Hewlett,et al.  Lea's chemistry of cement and concrete , 2001 .

[31]  John Bensted,et al.  Structure and Performance of Cements , 2001 .

[32]  R. Snellings,et al.  The zeolite–lime pozzolanic reaction: Reaction kinetics and products by in situ synchrotron X-ray powder diffraction , 2009 .

[33]  R. Snellings,et al.  Pozzolanic reactions of common natural zeolites with lime and parameters affecting their reactivity , 2009 .

[34]  Javier Campo,et al.  The superstructure of C3S from synchrotron and neutron powder diffraction and its role in quantitative phase analyses , 2002 .

[35]  E. Passaglia,et al.  Position of cations and water molecules in hydrated chabazite. Natural and Na-, Ca-, Sr- and K-exchanged chabazites , 1982 .

[36]  Ali Uçar,et al.  Properties of zeolitic tuff (clinoptilolite) blended portland cement , 2007 .

[37]  R. Snellings,et al.  Rietveld refinement strategy for quantitative phase analysis of partially amorphous zeolitized tuffaceous rocks , 2010 .

[38]  Milen Gateshki,et al.  Aluminum-rich belite sulfoaluminate cements: Clinkering and early age hydration , 2010 .

[39]  H. E. Petch.  The hydrogen positions in portlandite, Ca(OH)2, as indicated by the electron distribution , 1961 .

[40]  C. Hall,et al.  The paste hydration of brownmillerite with and without gypsum: A time resolved synchrotron diffraction study at 30, 70, 100 and 150 ??C , 2004 .

[41]  L. Black,et al.  Cell Dimensions and Composition of Nanocrystalline Calcium Silicate Hydrate Solid Solutions. Part 1: Synchrotron-Based X-Ray Diffraction , 2008 .

[42]  J. Russias,et al.  Structural characterization of C–S–H and C–A–S–H samples—Part I: Long-range order investigated by Rietveld analyses , 2009 .

[43]  A. Jupe,et al.  Slurry Consistency and In Situ Synchrotron X-Ray Diffraction During the Early Hydration of Portland Cements With Calcium Chloride , 2007 .

[44]  F. Goetz-Neunhoeffer,et al.  Refined ettringite (Ca6Al2(SO4)3(OH)12∙26H2O) structure for quantitative X-ray diffraction analysis , 2006, Powder Diffraction.