Experimental study reveals significant efflorescence on ceramic wicks from Portland cement mortars, indicating cementing alkalinity drives salt formation.
Ceramic wicks (Efflorwicks) were partly embedded in cylinders of masonry mortars of various compositions, and the hardened mortars were alternately wetted and dried, which produced various amounts of efflorescence on the wicks. Portland cement in mortars contributed significantly to efflorescence. The alkaline material of the cementing substance of the mortars appeared to be an important source of the efflorescence.
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Thomas Ritchie (1955) studied this question.
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