Chapter: Civil : Construction Materials: Lime, Cement, Aggregates, Mortar
Cement: Le-chatelier Method
Le-chatelier Method:
The
apparatus is shown in Fig. 30. The mould is placed on a glass sheet and is filled
with neat cement paste formed by gauging 100 g cement with 0.78 times the water
required to give a paste of standard consistency. The mould is covered with a
glass sheet and a small weight is placed on the covering glass sheet. The mould
is then submerged in the water at temperature of 27 o -32 o C. After 24 hours, the
mould is taken out and the distance separating the indicator points is
measured. The mould is again submerged in water. The water is now boiled for 3
hours. The mould is removed from water and is cooled down. The distance between
the indicator points is measured again. The difference between the two
measurements represents the unsoundness of cement.
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