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XRD and SEM Investigations of KGL, novel porous materials prepared in the system chlorite-sericite-quartz-gypsum-portlandite by means of steam curing

Technology reports of the Yamaguchi University Volume 4 Issue 4 Page 291-302
published_at 1990-12
KJ00004351128.pdf
[fulltext] 3.31 MB
Title
XRD and SEM Investigations of KGL, novel porous materials prepared in the system chlorite-sericite-quartz-gypsum-portlandite by means of steam curing
Creators Ikeda Ko
Creators Tashiro Chuichi
Creators Tomisaka Takeshi
Source Identifiers
Novel porous materials called KGL have been prepared from mining waste of Kuroko-type ore deposit added with III-anhydrite and portlndite by steam curing. The waste was calcined beforehand up to 1,000℃ and then pulverized and screened. The III-anhydrite was prepared from by-product gypsum and slaked lime of chemical was served for portlandite. These three raw materials were mixed in desired proportions and precursors were firstly made by slip cast technique flooded with appropriate amount of water. The precursors were air-dried for several days and then steam-cured for 24 hours. Thus, light weight porous materials have been obtained. The mining waste comprises chlorite, sericite and quartz in addition to some barite. Gypsum and C-S-H were found as hydrates by XRD. SEM observation revealed that acicular to lathlike crystals of gypsum developed mainly, also contributing to the strength development, when calcined the waste at higher temperatures, whereas the gypsum appeared in irregular platy form, when calcined the waste at lower temperatures.
Subjects
工学 ( Other)
Languages eng
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1990-12
File Version Version of Record
Access Rights open access
Relations
[ISSN]0386-3433
[NCID]AA0086073X
Schools 工学部