Sieve analysis of coarse and fine aggregate - Report

Sieve analysis of coarse and fine aggregate - Report

• 1.
  1 Soran University Civil EngineeringDepartment SIEVE ANALYSIS OF COARSE AND FINE AGGREGATES Student: Sarchia Khursheed Group: 2 Experiment NO.: 1 Date: 23.02.2016 Supervisor: Arianfar Haji
• 2.
  2 Introduction The sieve analysis,commonly known as the gradation test, is a basic essential test for all aggregate technicians. The sieve analysis determines the gradation (the distribution of aggregate particles, by size, within a given sample) in order to determine compliance with design, production control requirements, and verification specifications. The gradation data may be used to calculate relationships between various aggregate or aggregate blends, to check compliance with such blends, and to predict trends during production by plotting gradation curves graphically, to name just a few uses. Used in conjunction with other tests, the sieve analysis is a very good quality control and quality acceptance tool. Objective To determine the particle size distribution of the coarse and fine aggregates. Apparatus  A set of IS Sieves  Balance or scale with an accuracy to measure 0.1 percent of the weight of the test sample.  Mechanical sieve shaker (Optional) Materials  Coarse aggregate  Fine aggregate Procedure
• 3.
  3 1. The testsample is dried to a constant weight at a temperature of (110 ± 5°C) and weighed. 2. The sample is sieved by using a set of IS Sieves. 3. On completion of sieving, the material on each sieve is weighed. 4. Cumulative weight passing through each sieve is calculated as a percentage of the total sample weight. Data and Calculations Determination of Practical Size Distribution of Coarse Aggregate Total weight of Coarse Aggregate = 3,888 g Sieve size Weight of aggregate retained (g) % agg retained of total weight (g) Cumulative % agg retained of total weight (g) % agg Passing of each sieve 20 mm 697 18 18 82 10 mm 3026 78 96 4 5 mm 165 4 100 0 Pan 0 0 0 0 Determination of Practical Size Distribution of Fine Aggregate Total weight of Fine Aggregate = 858 g
• 4.
  4 Sieve size Weight of aggregate retained(g) % agg retained of total weight (g) Cumulative % agg retained of total weight (g) % agg Passing of each sieve 4.75 mm 206 24 24 76 2.36 mm 236 27.5 51.51 48.48 1.18 mm 330 38.46 89.97 10.02 600 μm 70 8.15 98.13 1.86 300 μm 15 1.75 99.88 0.11 150 μm 1 0.11 100 0.00 Pan 0 0 100 0.00 Discussion and Conclusion It is evident that sieves can be used to separate both fine and coarse aggregates into different particle sizes. The number sieves describes what size aggregate fall through to the next. After the material has been sieved, we remove each tray, weigh each size, and record each weight to the nearest 0.1 g, and Ensure that all material entrapped within the openings of the sieve are cleaned out and included in the weight retained. After weighting of each sieve samples, we do some calculations to determine percentage (%) of retained aggregate, cumulative % agg retained and % agg passing of each sieve. We conclude that sieve analysis is the simple and easy way to determine the particle size distribution of aggregate and this sieve analysis procedure can be used by people who are working in the laboratory like government laboratory and private independent laboratory.