Sieve Analysis Test Lab Report

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INTRODUCTION Aggregate is one of the basic constituents of concrete. Its quality is of considerable importance because about three-quarter of the volume of concrete is occupied by aggregates. One of the physical properties of aggregate that influence the property of concrete is the grading of aggregate. The grading of aggregate defines the proportions of particles of different size in the aggregate. The grading of fine (size < 5 mm) and coarse (size > 5 mm) aggregates are generally required to be within the limits specified in BS 882: 1992. OBJECTIVE The objective of this experiment is to obtain the grading curve for both fine and coarse aggregate. APPARATUS 1. Balance - balance or scale used in testing fine and coarse…show more content…
4. The sample was placed on the top sieve and the sieves was agitated by mechanical sieve shaker for a sufficient period so that after completion, not more than one percent by weight of the residue on any individual sieve will pass that sieve. 5. The weight of each size increment was determined by weighing the residue contained on each sieve. This has be done in a cumulative fashion by starting with the smallest, particles in the bottom pan. After this weight has been determined, the next larger particles was added into the same pan and the cumulative weight was determined. Coarse Aggregate 1. A representative sample was chosen by quartering (according to BS 812: Part 102: 1984) or by use of a sample splitter (Fig. 2C1-3). The sample to be tested should be the approximate weight desired when dry. For this experiment, about 3 kilograms of coarse aggregate was weighed. 2. The procedure no. 2 to 5 was repeated as stated for fine aggregate using appropriate sieve size. DATA AND ANALYSIS A. Fine aggregate sample weight : 500g BS sievesize | Weightof seive(gm) | Weight of Sieve + Sample (gm) | Retained Weight(gm) | Passed Weight(gm) | Retained Percentage(%) | Passed Percentage(%) | 5mm | 760 | 770 | 10 | 490 | 2 | 98 | No.7(2.36mm) | 736 | 814 | 78 | 412 | 15.6 | 82.4 | No.14(1.18mm) | 653 | 791 | 138 | 274 | 27.6 | 54.8 | No.25(600m) | 633 | 753 | 120 | 154 | 24.0 | 30.8 | No.52(300m) | 574 | 657 | 83 | 71 |
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