- 蘭 聰，羅 杰，盧佳林，陳 景，楊仕海
引用本文摘 要：研究了Ⅱ級粉煤灰、再生磚粉和再生混凝土微粉的基本性能，對比了再生磚粉和再生混凝土微粉替代Ⅱ級粉煤灰對混凝土工作性和力學性能的影響；并通過改性劑改善混凝土坍損過大的問題，分析了改性劑影響混凝土力學性能的機理。研究結果表明，再生磚粉和再生混凝土微粉在一定細度條件下，其性能與Ⅱ級粉煤灰相當；緩凝劑、激發劑以及部分表面活性劑組成的改性劑對工作性和力學性能具有明顯的改善作用；而水化鋁硅酸鈣對混凝土力學性能有較大的提高作用。 Abstract: The basic properties of the fly ash, recycled brick powder and recycled concrete powder are studied. The recycled brick powder and recycled concrete powder instead of fly ash in concrete preparation are compared. The influence on the working performance and mechanical properties are investigated. And by adding the modifier to improve the large concrete slump loss. The mechanism of change influence of modifiers on mechanical properties of concrete are analyzed. The results show that the performance of recycled brick powder and recycled concrete powder in certain fineness conditions is similar to fly ash. The retarder, activator and some surfactant composition modifier have obvious effect on the working performance and mechanical properties, the hydration calcium silicate aluminum can improve the mechanical properties of concrete obviously.