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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