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A reply to John Bensted's discussion of the paper “mechanism of the CaCl2 attack on portland cement”

✍ Scribed by S. Chatterji

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
35 KB
Volume
9
Category
Article
ISSN
0008-8846

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Mechanism of the CaCl2 attack on portlan
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✍ S. Chatterji 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 402 KB

It is known that concentrated solutions of CaCI 2 can cause the breakdown of Portland cement concrete. Recently it has been shown that the severity of CaC12 attack decreases with increasing temperature and above 40°C concrete is not affected. From the above observation it was inferred that the break

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In regard to Dr. Chatterji's comments, the author agrees that many investigators including Lea have pointed out the detrimental effect on strength associated with gypsum formation during sulfate attack on portland cement concrete. In the earlier literature, however, the strength loss due to gypsum f

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In regard to the specific value of the strength loss on sulfate attack, the author and his co-workers (6)\* reported 40% loss of compressive strength in 90-day old alite pastes which contained 6% gypsum. It is possible that in the presence of sulfate ions the decrease in the stiffness of C-S-H, whic

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In his paper Prof. Mehta has commented that the effect of gypsum formation on the sulfate attack has not been properly explained in the literature. As far as I know, Lea was the first to propose that gypsum formation may cause damage to Portland cement concrete and explained this on the assumption o