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PAPERBACK list:$31.75 Web:$28.57 add to cart Rights & Permissions Free PDF Access Free Resources Sign in to download PDF book and chapters PDF EXECUTIVE SUMMARY Display this book on your site! Related Titles Visualizing Chemistry: The Progress and Promise of Advanced Chemical Imaging Materials Research to Meet 21st Century Defense Needs Other Related Titles Nonconventional Concrete Technologies: Renewal of the Highway Infrastructure (1997) National Materials Advisory Board (NMAB) Web Search Builder Use this book's key terms to search within this book, across our collection, or across the Web. Skim This Chapter Skim this chapter and use this chapter's key terms to search within this book. Reference Finder Paste in your own text to find books that relate to your topic. Page 107 The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. Chemical Formulas of Cement Materials C CaO H H2O S SiO2 SO3 A Al2O3 N Na2O F Fe2O3 K K2O M MgO C3S 3CaO·SiO2 = tricalcium silicate = alite C2S 2CaO·SiO2 = dicalcium silicate = belite C3A 3CaO·Al2O3 = tricalcium aluminate C4AF 4CaO·Al2O3·Fe2O3 = calcium alumino ferrite C-S-H Calcium silicate hydrate, a colloidal and mostly amorphous gel with a variable composition; this is the major hydration product of Portland cement, constituting approximately 70 percent of the paste, and is the phase providing most of the strength and binding CH Calcium hydroxide, a hydration product constituting approximately 20 percent of the paste and, while contributing little to the overall strength, buffers the paste pore solution to a pH of approximately 12.5 Afm Tetra-calcium aluminate trisulfate hydrate, usually with some substitution of Al by Fe and SO4 substituting for hydroxyl   Page 107 Front Matter (R1-R14) Executive Summary (1-10) 1 Introduction and Background (11-38) 2 Controlled Synthesis of Potential Matrix Materials and Reactive Additives (39-52) 3 Reinforcement (53-62) 4 Concrete Processing (63-73) 5 Systems Approach to Concrete Technology (74-85) References (86-90) Appendix A: Workshop Participants (91-94) Appendix B: Modern Sensor Technology (95-99) Appendix C: Conventional Concrete Test Procedures (100-102) Appendix D: Biographies of Committee Members and Technical Consultants (103-106) Chemical Formulas of Cement Materials (107-108) Glossary (109-110)

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OCR for page 107
Nonconventional Concrete Technologies: Renewal of the Highway Infrastructure Chemical Formulas of Cement Materials C CaO H H2O S SiO2 SO3 A Al2O3 N Na2O F Fe2O3 K K2O M MgO C3S 3CaO·SiO2 = tricalcium silicate = alite C2S 2CaO·SiO2 = dicalcium silicate = belite C3A 3CaO·Al2O3 = tricalcium aluminate C4AF 4CaO·Al2O3·Fe2O3 = calcium alumino ferrite C-S-H Calcium silicate hydrate, a colloidal and mostly amorphous gel with a variable composition; this is the major hydration product of Portland cement, constituting approximately 70 percent of the paste, and is the phase providing most of the strength and binding CH Calcium hydroxide, a hydration product constituting approximately 20 percent of the paste and, while contributing little to the overall strength, buffers the paste pore solution to a pH of approximately 12.5 Afm Tetra-calcium aluminate trisulfate hydrate, usually with some substitution of Al by Fe and SO4 substituting for hydroxyl  

OCR for page 108
Nonconventional Concrete Technologies: Renewal of the Highway Infrastructure Aft Ettringite, a calcium trialuminate hydrate, usually with some substitution of Al by Fe Monosulfate (Afm with complete SO4 substitution) w/c or w/b Mass ratio of water to cement or binder (cement + mineral admixtures)

Representative terms from entire chapter:

hydration product