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By Tanabe, Tada-aki

CREEP, SHRINKAGE and sturdiness MECHANICS OF CONCRETE and urban constructions includes the keynote lectures, technical experiences and contributed papers awarded on the 8th foreign convention on Creep, Shrinkage and sturdiness of Concrete and urban constructions (CONCREEP8, Ise-shima, Japan, 30 September - 2 October 2008). the themes coated include:
- Micro structural characterization and micro-mechanics of creep and shrinkage
- Multiphase and multi-scale ways to creep, shrinkage and durability
- Creep and shrinkage of early age concrete
- interplay among creep and fracture in cement established materials
- Structural mechanics of creep and shrinkage
- Creep, shrinkage, and sturdiness of recent concrete products
- Shrinkage decreasing tools and admixtures
- Deterioration kinetics of concrete constructions in competitive environments and its modeling
- longevity mechanics of concrete and urban structures
- trying out tools of sturdiness similar characteristics
- layout, average techniques, and Codes
CREEP, SHRINKAGE and sturdiness MECHANICS OF CONCRETE and urban constructions should be of curiosity to lecturers, engineers and pros eager about concrete and urban constructions

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Extra resources for Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Two Volume Set: Proceedings of the CONCREEP 8 conference held in Ise-Shima, Japan, 30 September - 2 October 2008

Example text

Values of the indentation hardness for LD and HD C-S-H obtained from nanoindentation, along with the microme-chanical prediction for an aggregation of particles based on the self-consistent scheme, versus the packing fraction of the particles. The predicted percolation threshold at 50% packing is consistent with a granular material (after Constantinides and Ulm 2007; Ulm and Jennings 2008). Figure 7. A transmission electron micrograph (Jennings et al. 1981) of a mature C3 S paste, showing LD and HD product.

It also illustrates how changes to the nanostructure have a corresponding influence on the complex properties of creep and shrinkage. A key thesis of this paper is that the nanostructure of C-S-H gel is granular, or particulate. The strategy of applying specific concepts related to nanogranular or colloidal materials to cement-based materials holds significant promise for linking processing and properties according to the precepts of materials science. 1 properties are lacking. In metals, as an example of materials science, the famous Hall-Petch relationship relates grain size, d,to yield stress according to: INTRODUCTION Materials science is a relatively new field of study at the boundary of two disciplines, applied mechanics and chemistry, focusing on relations between the mechanical behavior of materials and their microstructures.

Asghari, and J. Schmidt (1976). Experimental study of creep of hardened portland cement paste at variable water content. Materials and Structures 9 (4), 279–290. P. C. Chern (1985). Concrete creep at variable humidity: constitutive law and mechanism. Materials and Structures 18 (1), 1–20. B. Hauggaard, S. -J. Ulm (1997). Microprestress solidification theory for concrete creep. I: Aging and drying effects. ASCE Journal of Engineering Mechanics 123 (11), 1188–1194. H. Hemann, H. J. Najjar (1973).

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