STUDIES ON MIXING BENTONITE TO PORTLAND CEMENT, PART I
セメントにベントナイト混合の比較試驗 (第1報)

Shoichiro Nagai, Tadashi Nakagawa
1936 Journal of the Ceramic Association, Japan  
Recently there are many reports of studies on Japanese bentonite (e. g., Uchida,
doi:10.2109/jcersj1892.44.385 fatcat:ymgy73pxtrfhfgj62w4f2uwqye