Zobrazeno 1 - 10
of 183
pro vyhledávání: '"Hamlin M. Jennings"'
Autor:
Michael Edward Laracy, Hamlin M. Jennings, Elsa Olivetti, John Ochsendorf, Thomas Poinot, Cecilio Aponte
Publikováno v:
Prof. Olivetti via Erja Kajosalo
This research incorporates waste boiler ash into masonry construction materials using alkali-activation. The boiler ash, derived from three different Indian pulp and paper mills, has many undesirable characteristics for alkali-activation, including v
Publikováno v:
Cement and Concrete Research. 76:27-36
A new ability to quantitatively evaluate the complex pore system of cement pastes, using water sorption isotherms, is used to illuminate: (a) evolutions of microstructure during drying, (b) the mechanisms that control drying shrinkage, and (c) a nove
Publikováno v:
Journal of the American Ceramic Society. 97:967-975
The hydration kinetics of tricalcium silicate (C3S) has been the subject of much study, yet the experimentally observed effects of the water-to-cement (w/c) ratio and particle size distribution have been difficult to explain with models. Here, we pro
Publikováno v:
Journal of the Mechanics and Physics of Solids. 60:1350-1362
A diverse class of viscous materials, which includes familiar materials such concrete, wood, and Kevlar, exhibit surprising, counterintutive properties under internal moisture content fluctuations. In test after test over the past 50 years, the visco
Autor:
Krystyn J. Van Vliet, Markus J. Buehler, Franz-Josef Ulm, Hamlin M. Jennings, Roland J.-M. Pellenq, Sidney Yip, Jeffrey C. Grossman
Publikováno v:
MRS Bulletin. 37:395-402
As the most abundant engineered material on Earth, concrete is essential to the physical infrastructure of all modern societies. There are no known materials that can replace concrete in terms of cost and availability. There are, however, environment
Publikováno v:
Cement and Concrete Research. 42:377-383
Alkali-activated slag (AAS) paste was analyzed using small-angle neutron scattering (SANS). The scattering response indicates that the microstructure consists of a uniform matrix of hydration product with a high surface area studded with unhydrated c
Autor:
André Nonat, Jeffrey W. Bullard, Jeffrey Schweitzer, George W. Scherer, Karen Scrivener, Richard A. Livingston, Hamlin M. Jennings, Jeffrey J. Thomas
Publikováno v:
Cement and Concrete Research
The current state of knowledge of cement hydration mechanisms is reviewed, including the origin of the period of slow reaction in alite and cement, the nature of the acceleration period, the role of calcium sulfate in modifying the reaction rate of t
Publikováno v:
Mechanics of Materials. 43:408-419
This manuscript presents a numerical model of the low-density and high-density calcium–silicate–hydrate (C–S–H) gel phases in cement paste. Generated using an autocatalytic growth algorithm, C–S–H is introduced as an assemblage of discret
Publikováno v:
Cement and Concrete Research. 41:842-846
Addition of pure calcium silicate hydrate (C–S–H) to alkali-activated slag (AAS) paste resulted in an earlier and larger hydration rate peak measured with isothermal calorimetry and a much higher compressive strength after 1 d of curing. This is
Autor:
Jeffrey W. Bullard, Hamlin M. Jennings
Publikováno v:
Cement and Concrete Research. 41:727-735
An approach rooted in fundamental, mechanistic models of concrete materials offers the only viable path for handling the enormous number of variables that are being introduced as new materials are added to the design space, and as new properties are