1 Determination of Slump of Hydraulic Cement Concrete Determination of Slump of Hydraulic Cement Concrete (ASTM Designation: C 143) Mohammed Abdullah Al Zemame Abdullah Abdulkarem Al Gashami Majeed Mufleh Al Motairi Sultan Owaied Al Fadel Supervisor: Dr Amjed Khabaz Civil and Environmental Engineering Department College of Engineering, Engineering Day 23 April 2013

2 Objectives The purpose is to determine the consistency of a freshly mixed concrete by measuring the slump

3 Significance to KSA The slump test is used to measure concrete consistency, which has big significance in all concrete projects of the Kingdom of Saudi Arabia.

Description 4

5 Equipment and Materials Frustum of a cone made of noncorrosive sheet metal not less than 1.14 mm thick, 30.5 cm in height, with a 20.8 cm base, having a diameter at the top of 10.2 cm, with foot pieces and handles (Figure 1). There should also be a metal base plate with clamps that engages the foot pieces while the concrete is being poured into the slump cone and tamped with the tamping rod. Round steel tamping rod 16 mm diameter, having the tamping end rounded to a hemispherical tip, approximately 60 cm long. Suitable, graduated metal scale approximately 50 cm (2 ft.) in length.

6 Test Procedure 1) Dampen the slump cone and the metal base plate, then engage the slump cone with the base plate clamps. The base plate should rest on a level surface. 2) Fill the slump cone in three lifts, tamping each lift 25 times with the tamping rod, starting from the center and working toward the perimeter. The bottom lift should be rodded the full depth down to the base plate. For the 2 other lifts, the strokes of the tamping rod should penetrate into the underlying concrete layer. The top lift should remain heaped above the top of the slump cone after completing the rodding. Each of the 3 lifts should contain approximately an equal volume of concrete. Therefore, the bottom layer should have a rodded depth of about 7 cm and the second lift to about 15 cm.

7 Test Procedure (Cont.) 3) Strike off the excess concrete with ascending and rolling motion of the tamping rod. 4) Remove the cone carefully with a slow vertical motion without any rotational or lateral motion. The entire procedure from the time the fresh concrete is ready for testing to this point should be no more than 5 min. The time from the filling of the slump cone to the determining of the slump should be within 2 1/2 min. 5) Set the slump cone in an inverted position next to the concrete and measure the distance to the top of the original center of the specimen as shown in Figure 2

8 Results

9 Results

10 Thanks for your attentions