Physical performances of blended cements containing calcium aluminosilicate glass powder and limestone

Hydration of quaternary Portland cement blends containing blast-furnace slag, siliceous fly ash and limestone powder

“…Similar effects have been observed for blends of OPC with fly ash or blast-furnace slags [9,10,19,20]. The presence of fly ash, which contains generally more Al 2 O 3 than OPC, leads to the for-…”

“…Similar effects have been observed for blends of OPC with fly ash or blast-furnace slags [9,10,19,20]. The presence of fly ash, which contains generally more Al 2 O 3 than OPC, leads to the for- 1 Cement notation with ‫ܣ‬ ൌ ‫݈ܣ‬ ଶ ܱ ଷ , ‫ܥ‬ ൌ ‫,ܱܽܥ‬ ‫ܥ‬ ҧ ൌ ‫ܱܥ‬ ଶ , ‫ܪ‬ ൌ ‫ܪ‬ ଶ ܱ, ܵ ൌ ܱܵ݅ ଶ , ܵ ҧ ൌ ܱܵ ଷ mation of more AFt and AFm phases, such that the effect can be more pronounced.…”

“…However, not only the total amount of Al 2 O 3 in the system, but also the reaction degree of the aluminium containing phases (C 3 A, C 4 AF, SCMs) is an important factor [17]. The amount and fineness of calcite plays a minor role [13].Similar effects have been observed for blends of OPC with fly ash or blast-furnace slags [9,10,19,20]. The presence of fly ash, which contains generally more Al 2 O 3 than OPC, leads to the for-…”

“…Investigations in OPC-LS and OPC-FA-LS cements have shown that this volume increase correlates strongly with the development of compressive strength and an increase in compressive strength has been observed up to 10 wt.% limestone [9,[19][20][21]. The contribution of Si-rich fly ashes to the formation of AFt and AFm phases is limited due its low reaction degree.…”

“…The presence of fly ash, which contains generally more Al 2 O 3 than OPC, leads to the for- 1 Cement notation with ‫ܣ‬ ൌ ‫݈ܣ‬ ଶ ܱ ଷ , ‫ܥ‬ ൌ ‫,ܱܽܥ‬ ‫ܥ‬ ҧ ൌ ‫ܱܥ‬ ଶ , ‫ܪ‬ ൌ ‫ܪ‬ ଶ ܱ, ܵ ൌ ܱܵ݅ ଶ , ܵ ҧ ൌ ܱܵ ଷ mation of more AFt and AFm phases, such that the effect can be more pronounced. Investigations in OPC-LS and OPC-FA-LS cements have shown that this volume increase correlates strongly with the development of compressive strength and an increase in compressive strength has been observed up to 10 wt.% limestone [9,[19][20][21]. The contribution of Si-rich fly ashes to the formation of AFt and AFm phases is limited due its low reaction degree.…”