1
Heikki Ahonen, Timo Kenakkala, Pertti Kokkonen: Method of producing cement or concrete. Oy Iampella, January 15, 1991: US04985081 (1 worldwide citation)

A method of producing cement or concrete, comprising the step of adding fly ash to the cement or concrete at the production stage, the fly ash containing lime and reaction products from the reaction occurring between lime and sulphur oxides in connection with the desulphuration of flue gases. To avo ...


2
Heikki Ahonen, Pertti Kokkonen, Timo Kenakkala: Method of producing cement or concrete. Oy Tampella, CHEN XIUZHUANG, September 26, 1990: CN90101388

A method of producing cement or concrete, comprising the step of adding fly ash to the cement or concrete at the production stage, the fly ash containing lime and reaction products from the reaction occurring between lime and sulphur oxides in connection with the desulphuration of flue gases. To avo ...