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increases with increasing temperature. Relative humidity is the ratio in percentage between the absolute humidity and humidity at saturation: At saturation, p = P, and the relative humidity is 100%. For example, a pure cotton paper in a

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Journal of Thermal Analysis and Calorimetry
Authors: Robson Miranda da Gama, Tatiana Santana Balogh, Simone França, Tânia Cristina Sá Dias, Valcinir Bedin, André Rolim Baby, Jivaldo do Rosário Matos, and Maria Valéria Robles Velasco

30 s with 15.0% (w/v) sodium lauryl sulfate to remove impurities. All were wetted with warm (37.0 ± 5.0 °C) distilled water constant flow of 240.0 mL min −1 for 1 min and then dried at room temperature (22.0 ± 1.0 °C) and relative humidity (RH 60 ± 5

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curing continuous at ambient (21 ± 1 °C and 54% of relative humidity) temperature for at least 28 days before characterization. Characterization of geopolymer materials Mineral phase content The

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Artificial pozzolanic cement pastes containing burnt clay with and without silica fume

Physicochemical, microstructural and thermal characteristics

Journal of Thermal Analysis and Calorimetry
Authors: M. S. Amin, S. A. Abo-El-Enein, A. Abdel Rahman, and Khaled A. Alfalous

using one inch cubic molds. The molds, containing the pastes, were cured at 100% relative humidity for 24 h to attain the final setting, and then, the cubic specimens were removed from the molds and cured under water at room temperature for different

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M 20 Universal mill and conditioned at water activity, a w of 0.50 (relative humidity, RH) and 296 K for 48 h before measurement. Data was smooth using Savitzky-Golay exponential filter that preserved features of the X-ray curves while removing

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vapor adsorption onto poly (styrensulfonic acid), sodium salt has indicated that the adsorption capacity of the monosulfonated sample reached more than 80% mass under 80% relative humidity equilibrium and the heat of adsorption was about standard

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and relative humidity (RH) of 90% for 24 h, the specimens were demolded and cured in lime-saturated water at 20 ± 1 °C, followed by the strength tests according to EN 196–1 [ 17 ]. Activity index of the fly ash used was calculated as the strength ratio

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was in average temperature ranged between 20 and 22 °C and the relative humidity (RH) ranged between 65 and 67%. Method of evaluation Flammability test The vertical flame spread test method by

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environmental pollutants, relative humidity and the extreme variability of materials housed in collections. Corrosion develops under thin layers of adsorbed oxygen and water and only a few adsorbed molecular layers of moisture are required for corrosion to

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a Pulverisette ball mill for 10 min, at a relative humidity of 23% (100 g solid materials and 30 mL water). Characterization methods The hematite crystallization in the prepared frit (A4) was investigated using a

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