کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
259496 | 503636 | 2011 | 8 صفحه PDF | دانلود رایگان |
The early age microstructure evolution was continuously monitored by using a specially improved ultrasonic monitoring apparatus. The influence of water-to-binder ratios, mineral admixtures, aggregates and temperature were systematically investigated. The experimental results show that concrete can be clearly classified into four stages, while only the three stages can be observed without coarse aggregates. In addition, pre-percolation threshold, percolation threshold and full connectivity of the solid phase were identified. The microstructure formation is promoted with the reduced water-to-binder ratios, increased temperature, silica fume and aggregates addition, while the reverse phenomenon is observed when fly ash and slag are incorporated.
► The microstructure evolution is monitored by using an improved ultrasonic monitoring apparatus.
► Four characteristics stages are distinguished in cementitous materials.
► There critical points are also individuated.
Journal: Construction and Building Materials - Volume 25, Issue 10, October 2011, Pages 3998–4005