Advances in concrete construction

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Behaviour of self compacting repair mortars based on natural pozzolana in hot climate

  • Benyahia, A. (Geomaterials Laboratory, Civil Engineering Department, Hassiba Benbouali University of Chlef) ;
  • Ghrici, M. (Geomaterials Laboratory, Civil Engineering Department, Hassiba Benbouali University of Chlef)
  • Received : 2017.12.18
  • Accepted : 2018.04.17
  • Published : 2018.06.25
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Abstract

In the present paper, the results of an experimental study of the bond between repair materials and mortar substrate subjected to hot climate is presented. Half-prisms of size $40{\times}40{\times}80mm$, serving as a substrate mortar samples (SUBM) were manufactured in the laboratory and then stored at an ambient temperature for 6 months. Five self compacting mortar mixes (SCMs) incorporating 0%, 10%, 20%, 30%, and 40% of natural pozzolana as white cement replacement were used as repair materials. Repaired composite samples (SCMs/SUBM) were cured at hot climate for different lengths of time (28 and 56-days). During the first week of curing, the composite samples were watered twice a day. The test carried out to assess the bond between SCMs and SUBM was based on three-point bending (3 PB) test. The obtained results have proved that it was feasible to produce compatible repair materals in this curing environment by using up to 30% natural pozzolana as white cement replacement.

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