In fact a 35 % mix of fly ash as a cement substitute was used in construction of the Feitsui Dam four years ago, to avoid the cracking that can occur in concrete due to the fast release of heat from cement.
其實我們在四年前完工的翡翠大壩工程，便以百分之卅五的飛灰取代水泥，避免水泥快速釋放的熱量造成混凝土裂縫。