PSI - Issue 23
Małgorzata Lenart et al. / Procedia Structural Integrity 23 (2019) 113 – 118 Author name / Structural Integrity Procedia 00 (2019) 000 – 000
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4. Conclusions
The following conclusions can be made on the basis of the research and the obtained results:
All mortars containing granules (both 1 and 14 days) showed greater shrinkage than the control mortar. The shrinkage of the control mortar was 0.72 mm/m, the mortar with 50% 1 day granules 1.16 mm/m and the mortar with 50% 14 days granulate 0.96 mm/m, measured in automatic gutters after 40 days of tests. Mortars with 1 day granulate have a larger shrinkage than mortars with 14 day granulate. The shrinkage of the mortar with 50% content of 1-day granulate (measured after 40 days of samples storage) was greater by about 20% than the shrinkage of the mortar with 50% content of 14-day granulate in the method of automatic gutters. This phenomenon is most likely related with a larger shrinkage of the 1-day granulate containing still reacting cement. A slow stabilization of shrinkage deformations of mortars with 14 day granulate is noticeable after 40 days of observation in the method of automatic shrinkage gutters. The measured nature of the shrinkage of the tested mortars was similar in both methods of shrinkage measurement: the Graff-Kaufmann method and the automatic gutter method.
Acknowledgements
The paper preparation was supported in part with the funds of the project EMMAT E-mobility and sustainable materials and technologies PPI/APM/2018/1/00027 financed by the Polish National Agency for Academic Exchange (NAWA).
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