Experiment 10, 11 ,12

Experiment 10, 11 ,12 - Experiment #10, 12 and 14 #10-...

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Experiment #10, 12 and 14 #10- Slump of Freshly mixed Portland Cement Concrete #12- Air Content of Freshly Mixed Concrete by the Pressure Method #14- Making and Curing of Concrete Cylinder and Beams February 21, 2008 Prepared By: Group: Big Rocks For: Construction Materials Lab CE 2341 Section 001 Professor Spiegel 1
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Purpose : Experiment #10 This part of the lab is done to gain a better understanding of the use and execution of a slump test which determines the workability, consistency and strength of the mixture of concrete. This test is also a fast and efficient way to verify that the concrete which is ordered to a work site is uniform. Samples would be taken throughout various intervals and if the results of the test remain consistent the concrete is uniform. A typical slump ranges from 4 to 6 inches. Experiment #12 This test is used to determine the air content of freshly mixed concrete from observation of the change in volume of concrete with a change in pressure. The air content of the concrete determines the type of use and durability of the mixture. Experiment #14 This part of the lab has yet to be completed. Thus far, we have constructed two cylinder molds of our concrete mix to later be tested for its compressive strength. This test is performed by making two cylindrical concrete specimens and using a compression-testing machine to determine their strength. The compressive strength is calculated by dividing the failure load by the cross sectional area. The compressive strength is measured in pound-force per square inch (psi) of megapascal (MPa) Equipment/Apparatus: Our Concrete Mix: (1.5 ft 3 ) (*for the use in all experiments) Portland Cement Concrete (34.4 lbs.) Sand (77.78 lbs.) Stone (100 lbs) Superplasterciser (5.3 oz.) Potable Water (1.83 gallons) *Mixed the Portland cement, sand, stone, superplasterciser and water in a mixer in order to make the concrete. Note : The proportions of the ingredients were derived from the appropriate amounts used to make 1yd 3 of concrete. Experiment #10: Our Concrete Mix Shovel Slump Cone (12’ high) Scoop Tamping Rod Trowel 12” Ruler (precise to 1/8”) Water Bucket Sponge 2-Cylindrical shaped cone with lid Plywood board (3’ x 3’) Square Metal pan Wheel Barrel Mixer 2
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Experiment #12: Our Concrete Mix Potable water Syringe Sponge Metal Rod (16”, hemispherical tip) Pressure Meter
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Experiment 10, 11 ,12 - Experiment #10, 12 and 14 #10-...

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