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. In K. Nasukawa and P. Backley (eds.) Strength relations in phonology . Berlin & New York : Mouton de Gruyter . 9 – 46 . Hayes , Bruce . 1986 . Inalterability in
predictions concerning the strength of vowels. In section 2 , we briefly summarize how the fortition and the lenition of consonants can be derived from branchings and contours. Then, we show that these two notions can also derive the strength of vowels. In
Calorimetry in the studies of cement hydration
Setting and hardening of Portland cement–calcium aluminate cement mixtures
Abstract
Calorimetry was applied to an investigation of the early hydration of Portland cement (PC)–calcium aluminate cement (CAC) pastes. The heat evolution measurements were related to the strength tests on small cylindrical samples and standard mortar bars. Different heat-evolution profiles were observed, depending on the calcium aluminate cement/Portland cement ratio. The significant modification of Portland cement heat evolution profile within a few hours after mixing with water was observed generally in pastes containing up to 25% CAC. On the other hand the CAC hydration acceleration effect was also obtained with the 10% and 20% addition of Portland cement. As one could expect the compressive and flexural strength development was more or less changed—reduced in the presence of larger amount of the second component in the mixture, presumably because of the internal cracks generated by expansive calcium sulfoaluminate formation.
Introduction Knowledge of shear strength along discontinuities in rock mass is essential for the design process of underground structures, such as tunnels ( Borbély et al. 2015 ), foundations, and rock slope stability
944 Kwak Y. K., Eberhard M. O., Kim W. S., Kim J. Shear strength of steel fiber-reinforced concrete beams without stirrups, ACI Structural Journal , Vol. 99, 2002, pp. 530
conditions [ 1 ], and also the heat of hydration during the hardening process leads to shrinkage, inner pores which permit the reduction of strength and durability. In this situation, some additives are used to improve the desirable properties of concrete
of Strength of Materials. MCGrawHill, 1953. http://kupffer.info/seite5.html Bojtár Imre: A szilárdságtan nagy tudósai – Saint-Venant és a lokális hatások elve. BME, 2007
Introduction Recently, it was proposed that muscle size and strength from repeated bouts of exercise are separate physiological adaptations (i.e., changes in size are not driving changes in strength) ( 3 ). In support of this
Introduction Grip strength measurements are useful markers for children's physical growth and development. For example, valid and reliable measures of grip strength have provided important insights into children's nutritional status [ 1 , 2 ]. The
Early stages hydration of high initial strength Portland cement
Part I. thermogravimetric analysis on calcined mass basis
different water/cement ratio studied pastes. Materials For this study, a high-initial strength and sulphate resistant Portland cement (HS SR PC) [ 18 ] was used, which allows reaching high strengths still at the early hydration
