THE PHYSICAL STRUCTURE AND ENGINEERING PROPERTIES OF CONCRETE
THE PAPER RELATES PRIMARILY TO THE PROPERTIES AND STRUCTURE OF CEMENT GEL, AND SUGGESTS THAT THE SEVERAL COMPONENTS OF CEMENT HYDRATE AT THE SAME RATE BECAUSE OF THE IDENTICAL COMPOSITION OF HYDRATION PRODUCTS REGARDLESS OF AGE AT WHICH THEY ARE FORMED. MODELS OF PASTE STRUCTURES ARE GIVEN AND THE STRENGTH OF THE PASTE AS RELATED TO GEL-SPACE RATIO IS DISCUSSED. PASTE IS SUBJECTED TO HYDROTHERMAL VOLUME CHANGE AND THE THERMAL COEFFICIENT OF EXPANSION VARIES WITH MOISTURE CONTENT, BEING HIGHEST AT ABOUT 70 PERCENT RH. THE PERMEABILITY AND POROSITY OF CEMENT PASTE AND NATURAL ROCKS ARE COMPARED AND THE TREMENDOUS DECREASE IN PERMEABILITY WITH CURING IS STRESSED. THE DILATION OF SATURATED PASTES, BOTH AIR-ENTRAINED AND NON-AIR ENTRAINED, DURING A SINGLE FREEZE-THAW CYCLE AND THE ADVANTAGE OF AIR ENTRAINMENT ARE ILLUSTRATED. /PCA/
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Authors:
- Powers, T C
- Publication Date: 0
Media Info
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Serial:
- Portland Cement Assoc R & D Lab Bull
- Issue Number: 0
Subject/Index Terms
- TRT Terms: Cement; Concrete; Concrete curing; Gels; Hydration; Moisture content; Pastes; Permeability; Physical properties; Porosity; Thermal expansion; Volume changes
- Uncontrolled Terms: Concrete properties
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00213536
- Record Type: Publication
- Source Agency: Portland Cement Association
- Report/Paper Numbers: No 90
- Files: TRIS
- Created Date: May 25 1970 12:00AM