Resistance of mortars containing silica fume to attack by a solution containing chlorides

✍ Scribed by R.F. Feldman; Huang Cheng-Yi

• Book ID: 102996162
• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 442 KB
• Volume: 15
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(85)90114-0

✦ Synopsis

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, I0 and 30% silica fume, and sand-binder ratio was 2.25.

Stiffness, pore-size distribution, Ca(OH) 2 content and nonevaporable 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.