Resistance of mortars containing silica fume to attack by a solution containing chlorides |
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| Affiliation: | 1. Department of Neurology, University of Michigan, 109 Zina Pitcher Place, Ann Arbor, MI 48109, USA;2. Department of Neurosurgery, University of Michigan, 1500 E. Medical Center Dr, Ann Arbor, MI 48109, USA;1. NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI 48109, USA;2. Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA;3. Department of Neurosurgery, University of Michigan, Ann Arbor, MI 48109, USA;1. NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, United States of America;2. Department of Neurology, University of Michigan, Ann Arbor, MI, United States of America;1. Department of Neurology, University of Michigan, Ann Arbor, MI, United States;2. Department of Neurosurgery, University of Michigan, Ann Arbor, MI, United States |
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| Abstract: | Mortars prepared at water/cement + silica fume ratios, w/ (c+sf), of 0.45 and 0.60 were exposed to a solution containing a mixture of Mg-, Ca- and Na- chlorides to investigate their resistance to attack. Mixes contained 0, 10 and 30% silica fume, and sand-binder ratio was 2.25. Stiffness, pore-size distribution, Ca(OH)2 content and non-evaporable water were measured before and after exposure to salt solution. Inclusion of silica fume resulted in increased durability of mortar, especially in specimens prepared at w/ (c+sf) of 0.45 and cured for 28 days. Specimens prepared at the same w/ (c+sf) with 30% silica fume were also durable even after seven days of curing. Calcium hydroxide in mortars was reduced to zero by exposure to the salt solution. |
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