volcano ash effect的用法和樣例：
例句
- The impact on the pozzolanic effect by the fineness of superfine slag powder is changed with content.
摻量不同，火山灰效應受礦渣微粉細度的影響也不同。 - The analysis indicates that micropacking silica fume works to the density and relative density of RPC, and its pozzolanic effect helps the strength of RPC.
硅灰的微填充效應有利于提高活性粉末混凝土的密度和相對密度，而火山灰效應有利于提高其強度。
