Effect of water entrainment by pre-soaked biochar particles on strength and permeability of cement mortar

•Internal curing in mortar by water entrainment in pores of biochar is proposed.•Moisture retention and hydration degree are increased due to addition of pre-soaked biochar.•Increase in mechanical strength is observed in pre-soaked biochar mortar under wet curing and dry curing conditions.•Improved...

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