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JOURNAL OF MATERIALS AND ENGINEERING STRUCTURES 7 (2020) 57–72 65 2. Dry densities: The cubes taken from the curing water basin just before compression strength measured according to B.S.1881, part 5. 3. Compression strength test: (50* 50 *50) mm mortar cubes and (100* 100 *100) mm concrete cubes were prepared according to B.S.1881, part 7. The cubes were tested directly after taken out of water while they were still wet. 4. Strength of splitting tensile test: The splitting tensile strength has been done according to the ASTM C496-04 [26]. Cylinders of (100×200) mm were used and tested at 28 days. Placed two thick steel strips between the specimen and both the upper and the lower bearing blocks of testing machine, which was a hydraulic compression machine (see Fig. 6). The consists of test are put a compressive force with the cylindrical concrete specimen length until occurs the failure. 5. Ultrasonic pulse velocity test: The ultrasonic pulse velocity (UPV) test was applied according to ASTM C597 -09 [27]. PUNDIT device as shown in Fig. 7 was used in testing cubes and cylinders at age of 28 days. The method of measuring (UPV) depended on the time (T) needed for the waves to pass a distance (L) in concrete. In order to ensure stable transit time, grease and pressure were applied between the test object and the contact faces of the transducers”. Fig. 6- Testing of cylinder specimen Fig. 7- UPV test of cube specimenPDF Image | Properties of Concrete and Mortar with LDPE Aggregate
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