✦ LIBER ✦

The role of Ca(OH)2 in the breakdown of Portland cement concrete due to alkali-silica reaction

✍ Scribed by S. Chatterji

Publisher: Elsevier Science
Year: 1979
Tongue: English
Weight: 262 KB
Volume: 9
Category: Article
ISSN: 0008-8846
DOI: 10.1016/0008-8846(79)90024-3

No coin nor oath required. For personal study only.

✦ Synopsis

Both field observations and subsequent laboratory experiments showed that the presence of free Ca(OH)~ is a necessary condition for the breakdown of a PortlaHd cement concrete structure due to the destructive alkali-silica reaction. The complete removal of free Ca(OH) 2 either by leaching with a concentrated solution of CaCI 2 or by reacting with a pozzolana suppresses alkali-sillca reaction even when excess alkali metal salt ,including hydroxide ,is present in the structure.Attention has been drawn to certain practical implications of the above results.

Rannsoknir hafa sannad ad alkali-kisel efnabreytingar valda adeins skada a steinsteypu ad hun innihaldi fritt Ca(OH)2.

etta skadlega Ca(OH)? er hegt ad fjarlagja, annadhvort med sterkri CaCI~ uppl~usn eda vid efnabreytingu med notkun pozzolan. Ved ~aa minnka m~gulekarnir a skemmdum i steypunni jafnvel ~e ad hun innihaldi alkalisolt. Athygli er beint ad raunhafni nidurstadna vid ofannafndar rannsoknir.

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