微生物腐食を受けたコンクリートの鉱物学的研究: (2) モルタルの微生物腐食実験

フォーマット:

論文

責任表示:

田崎, 和江 ; 野中, 資博 ; 森, 忠洋 ; 野田, 修司 ; Tazaki, Kazue ; Nonaka, Tsuguhiro ; Mori, Tadahiro ; Noda, Shuji

言語:

日本語

出版情報:

日本粘土学会 The Clay Science Society of Japan, 1990-10-20

著者名:

田崎, 和江

野中, 資博

森, 忠洋

野田, 修司

Tazaki, Kazue

Nonaka, Tsuguhiro

Mori, Tadahiro

Noda, Shuji

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掲載情報:

粘土科学 = Journal of the Clay Science Society of Japan

ISSN:

0470-6455      
2186-3563      

巻:

30

通号:

3

開始ページ:

178

終了ページ:

183

バージョン:

publisher

概要:

金沢大学理工研究域地球社会基盤学系<br />Mortar bars are exposed to H2S gas (25-300ppm) for 10 months at 12-30C°. Sulfate-generated deteriorations in the mortar bars include expansion, cracking and disintegration. The heavily corroded mortar bar pr … oduced gypsum, calcite and secondary ettringite with a trace amount of barite. The secondary ettringite shows the same chemistry as the primary ettringite, but the morphology is quite different from the primary one. Ettringite crystals with sharp point, 10-20μm long, are primary formed during the hydration of mortar bar, whereas small lath-shaped crystals, about 3μm long as observed by SEM are high concentration of hydroxyl ions. Gypsum, calcite and the secondary ettringite are formed step by step under acidic condition. The iron oxides layer is presented significantly between corroded and un-corroded zones which is the same process of deterioration on portland cement concrete. 続きを見る

URL:

http://hdl.handle.net/2297/00061657