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Showing 1 to 20 of 110 for “"cement paste"”.
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Viscoelastic study of cement paste.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1967.
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A multiscale computational framework for cement paste
Cement paste is the matrix phase in mortar and concrete that exhibits a hierarchical structure spanning orders of magnitude in length scales. These complexities have prevented systematic studies of structure-property relationships. This understanding is necessary to design sustainable cementitious …
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A nanochemomechanical investigation of carbonated cement paste
… and in particular its principal component, cement paste, has an interesting relation with carbon dioxide. Concrete is a carbon dioxide generator-- it is estimated that 5-10% of atmospheric CO₂ comes from this source. Carbon dioxide is a concrete corroder-- it can penetrate into the porous …
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Investigation of the Dimensional Stability in DSP Cement Paste
… property was systematically investigated for cement pastes with a wide range of microstructure features. It was found that saturated paste behaves anomalouly in response to temperature change, i.e., the thermal expansion is followed by a time-dependent delayed contraction at isothermal …
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Moisture permeability of mature concrete, cement mortar and cement paste
… tests were performed on specimens of concrete, cement mortar and cement paste with the bottom side in water or in moist air and the upper side in a relative humidity of 33 %. The distribution of the relative humidity within the specimen was measured, at stationary conditions, as well as the …
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Sulfate attack on cement paste with volcanic ash : durability analysis
… is to investigate the effect of volcanic ash cements when exposed to different forms of sulfate attack, specifically to sodium and magnesium sulfates. Pozzolanic volcanic ash can be a viable partial substitute for Portland Cements to develop cement paste compositions for superior sulfate …
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INVESTIGATION ON RHEOLOGY OF CEMENT PASTE AND CONCRETE AT HIGH TEMPERATURE
… mechanisms that control the rheology of cement paste and concrete incorporating various chemical admixtures and subjected to high temperature and prolonged mixing time. The thesis also aimed at formulating recommendations for the effective use of chemical admixtures in high temperature …
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INVESTIGATION ON RHEOLOGY OF CEMENT PASTE AND CONCRETE AT HIGH TEMPERATURE
… mechanisms that control the rheology of cement paste and concrete incorporating various chemical admixtures and subjected to high temperature and prolonged mixing time. The thesis also aimed at formulating recommendations for the effective use of chemical admixtures in high temperature …
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Ultrasonic wave reflection measurements on stiffening and setting of cement paste
… to monitor stiffening and setting of portland cement paste. The research focuses especially on the very early hydration period, during the first hours after mixing. For such purpose, it is necessary to obtain higher measurement sensitivity, in this case by employing a buffer (high impact …
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Modeling of the Aging Viscoelastic Properties of Cement Paste Using Computational Methods
Modeling of the time-dependent behavior of cement paste has always been a difficulty. In the past, viscoelastic behavior of cementitious materials has been primarily attributed to the viscoelastic properties of C-S-H components. Recent experimental results show that C-S-H may not exhibit as much …
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Modeling The Fluid To Solid Transition In Cement Paste, Mortar, And Concrete
… for modeling the fluid-to-solid transition of cement paste, mortar, and concrete by application of generalized mathematical growth models. In the general case growth models are applied to mechanisms such as ontogenesis, chemical reactions, ecological systems (such as population growth or …
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Investigation of Reactive Electrokinetic Processes for Permeability Reduction in Hardened Cement Paste
… transporting chemical precursors into hardened cement paste pores using an electric field and causing them to undergo a chemical reaction that results in blocking the pores and reducing permeability. The chemical precursors, silicate and aluminate solutions and sols, were tested with simulated …
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Rheological studies and percolation modeling of microstructure development of fresh cement paste
… rheology, scanning electron microscopy (SEM) and cement hydration studies as well as theoretical modeling to gain fundamental understanding about the microstructure, its control of flow behavior, its development due to hydration, and setting.
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Curling deformations in cement paste slabs and effects of shrinkage reducing admixtures
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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CORROSION RESISTANCE PERFORMANCE INVESTIGATION OF MILD STEEL BAR COATED WITH MAGNESIUM PHOSPHATE CEMENT PASTE
… study, the anti-corrosion mechanism of reinforcement embedded in magnesium potassium phosphate cement (MKPC) is explored. In addition, one type of additives, metakaolin, and one type of retarder, boric acid, are employed in MKPC to modify its properties in order to further investigate corrosion …
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The Effects of Early-Age Stress on the Elastic and Viscoelastic Behavior of Cement Paste
… attributable to changes in properties in the cement paste, is an ongoing area of research with the objective of avoiding unpredictable response and potentially failure of concrete structures. This research explores the elastic and viscoelastic response in cement paste beams using relaxation …
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The effects of glycolic acid and Dow latex 464 (Saran) on the strength and microstructure of neat cement paste
Thesis (Civ. E.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1967.
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Biomineralization in cement based materials : inoculation of vegetative cells
Recently, self-healing applications of cement-based materials have received a lot of interest. One major area of interest with respect to self-healing applications in cement-based systems focuses on using biomineralization processes. Biomineralization is biochemical process in which microorganisms …
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