Exact(1)
An experimental program on SCC at early age (EA), combining limestone filler with several active mineral additions (AMA), metakaolin (MC), microsilica (MS) and nanosilica (NS), was carried out to assess the temporal relations among hydration, microstructure changes and drying shrinkage and their influence on early age cracking risks.
Similar(59)
The thermally induced cracking risk is also evaluated.
In addition, cracking risk is discussed according to the construction conditions based on the numerical analysis results.
For such uncommon stressing conditions, prediction of cracking risk becomes very complex and non-local fatigue approaches must be adopted.
However, fretting fatigue is characterized by a high stress gradient which overestimates cracking risk at the hotspot.
Cracking risk due to drying shrinkage at EA increased when some events related to the early age parameters occurred simultaneously.
The user should address the fundamental principles and mechanics of concrete hardening to obtain accurate temperatures, thermal stresses, and cracking risk calculations.
The local "hot-spot" analysis systematically overestimated cracking risk and induced more than 30% error with respect to the experimental values.
Higher compaction effort led to similar effects as cement addition, counterbalancing low cement contents usage and reducing costs and shrinkage cracking risk.
The purpose of the present study was to investigate how non-local strategies, such as "critical distance", developed for medium stress gradient conditions such as "notch" configurations, were transposed to predict fretting cracking risk.
Results showed that DPF produced on SCC similar effects to SRA in hot-dry environment, due to their ability to reduce early age drying shrinkage and cracking risk of the SCC.
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