The diameter of a cylinder in the Le-Chatelier apparatus for conducting the soundness test of cement is:
Le- Chatelier Test
Unsoundness in cement is due to excess lime, excess magnesia, or an excessive proportion of sulfates. Unsoundness in cement does not come to the surface for a considerable period of time. Therefore, accelerated tests are required to detect it.
The test is carried out by means of Le Chatelier's apparatus which consists of a small split cylinder of spring brass, or other suitable metal of 0.5 mm thickness, forming a mold 30 mm internal diameter and 30 mm high. On either side of the split are attached two indicators with pointed ends AA, the distance from these ends to the center of the cylinder is 165 mm.