𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A discussion of the paper “mechanism of sulfate attack on portland cement concrete - another look” by P.K. Mehta

✍ Scribed by S. Chatterji

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
70 KB
Volume
14
Category
Article
ISSN
0008-8846

No coin nor oath required. For personal study only.

✦ Synopsis

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 of a solid state conversion of Ca(OH) 2, present in the specimen, to gypsum (i). Since then it has been discussed many times. In 1968 an alternative explanation of the above damage was proposed in terms of the crystal growth pressure (2).

📜 SIMILAR VOLUMES

A reply to the discussion of “mechanism
A reply to the discussion of “mechanism of sulfate attack on portland cement concrete - another look” by I. Odler
✍ P.K. Mehta 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 75 KB

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

A reply to the discussion of “mechanism
A reply to the discussion of “mechanism of sulfate attack on portland cement concrete — another look” by S. Chatterji
✍ P.K. Mehta 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 55 KB

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