Abram Cone

The apparatus consists of a metallic mold in the shape of a frustum of a cone (slump cone), a metallic base plate, and a tamping rod. The slump test is a quick and inexpensive procedure that helps ensure the uniformity of concrete mixes and the quality of concrete used in construction. The test involves filling the cone with fresh concrete, tamping it in layers with the rod, and then lifting the cone to measure how much the concrete "slumps" or spreads. The results of the test indirectly check the water-cement ratio of the concrete