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- W2074389676 abstract "In order to elucidate the reinforcing effects of the fillers prepared from Japanese acid clay with hydrated lime and by calcination and mechanical disintegration, N hard clay (CaO 3–60%; calcination 400–800 °C, 1–1.5 hr; wet ball-milling 18 hr) derived from Nakajo acid clay (N) were investigated on the structure, physicochemical properties and morphology in comparison with those of N, Dixie Clay and Silene EF. X-Ray diffraction, infrared spectroscopy and electron micrography were applied to the examination of the structural and morphological features. The physicochemical properties were determined on the surface properties such as hygroscopicity, pH and DPG adsorption together with the specific gravity and bulk density. The following results were obtained: (1) Treatment under the optimum conditions (CaO 6%, calcination 600 °C, 1.5 hr; wet milling 18 hr) caused a favorable change in the structure of the prepared filler, resulting in controlling the surface properties, reduction in the particle size and its distribution, a decrease in the specific gravity and an increase in the bulk density. (2) Deviation from the conditions, e.g., calcination at 400 °C for 1.5 hr remained too much residual adsorptivity to improve the great surface activity of N, whereas treatment at 800 °C for 1–1.5 hr afforded sintering, collapse and/or fusion yielding too hard aggregates to be disintegrated as well as a serious breakdown or complete loss in the effective functional groups involved." @default.
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- W2074389676 date "1975-05-01" @default.
- W2074389676 modified "2023-10-14" @default.
- W2074389676 title "Preparation of Reinforcing Fillers from Japanese Acid Clays with Lime and by Calcination. III. Elucidation of the Reinforcing Effects Based on the Investigation of Changes in the Structure, Physicochemical Properties and Morphology of N Hard Clay" @default.
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- W2074389676 doi "https://doi.org/10.1246/bcsj.48.1621" @default.
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