Specific Gravity and Absorption of Fine Aggregate Set
The Specific Gravity and Absorption of Fine Aggregate Set is a precision instrument for measuring specific gravity and absorption of fine aggregates. It is a must have equipment for construction material testing laboratories, civil engineering firms and contractors who need accurate and consistent results.
The set includes a high quality pycnometer with conical mould and tamper. The pycnometer has 1qt (0.95L) capacity and is made of threaded glass for precise volume measurement. The conical mould has an inner diameter of 40mm at top and 90mm at bottom, suitable for different types of fine aggregates. The mould height is 75mm for easy sample loading and removal after testing. The 340g tamper has 25mm diameter face for easy tamping of fine aggregate.
The pycnometer has rubber gasketed brass top with tapered 1/8in (10mm) hole at top. This design ensures a tight seal to prevent water leakage during the test. The pycnometer is also easy to clean and can be used multiple times without loss of accuracy.
The Fine Aggregate Specific Gravity and Absorption Set meets AASHTO T84 and ASTM C 128 test methods, for industry standards compliance. The set provides accurate fine aggregate specific gravity and absorption measurements, for quality and durability of construction materials.
In short, the Fine Aggregate Specific Gravity and Absorption Set is a precision instrument for accurate and consistent results, for construction material testing laboratories, civil engineering firms and contractors. The set includes pycnometer, conical mould and tamper for easy use and accuracy. Meets AASHTO T84 and ASTM C 128 test methods, for industry standards compliance. Get the Gilson SG-1 Fine Aggregate Specific Gravity and Absorption Set today and measure fine aggregate specific gravity and absorption for your construction materials.
Fine Aggregate Specific Gravity and Absorption Set includes products required for testing of fine aggregate relative density specific gravity.
Pycnometer Jar has 1qt (0.95L) equal volume capacity and screw-on tapered brass top with rubber gasket and pour-hole. Conical Mould is seamless metal 3in (75mm) high with top inside diameter of 1.6in (40mm) and bottom inside diameter of 3.5in (90mm). Metal tamper is 340g (0.7lb) with 1in (25mm) diameter face.
Flask Adapter Set is required if Pycnometer Jar and Brass Top are used with Asphalt Rice Test Shaker.
Features:
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Meets ASTM and AASHTO standards
Includes:
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Fine Aggregate Specific Gravity and Absorption Set
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Pycnometer Jar and Brass Top
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Conical Mould
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Tamper
Accessories:
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Pycnometer Jar and Top Set to speed up testing time
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Conical Mould & Tamper Set to shape specimen samples and tamp the mixture firmly into the mould
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Conical Mould to shape specimen samples
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Metal Tamper to tamp specimen mixture into a mould
Purpose and Scope
The purpose of this article is to provide a detailed guide to specific gravity and absorption tests for fine and coarse aggregates. These tests are important to determine the quality and suitability of aggregates for construction. Specific gravity is the ratio of the mass of the aggregate particles to the mass of water, absorption is the amount of water the aggregate can absorb. Knowing these properties will help to assess the strength, durability and performance of construction materials.
This article covers definition of relative density specific gravity and its application in construction, equipment and apparatus required for the tests, testing procedures for fine and coarse aggregates and interpretation of results. By the end of this article you will know how to do specific gravity and absorption tests and how to use the results to make informed decisions for construction materials.
Required Apparatus and Equipment
To do specific gravity and absorption tests:
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Balance: A balance with 0.1% accuracy of the test sample weight is required.
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Container: A container with 1000ml capacity to hold the aggregate sample and water.
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Measuring Cylinder: A measuring cylinder with 1000ml capacity to measure volume.
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Wire Basket: A wire basket with mesh size not more than 6.3mm to hold the sample during the test.
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Perforated Container: A perforated container of convenient size to drain and handle the aggregate sample.
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Thin Wire Hangers: To suspend the wire basket from the balance during weighing.
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Pycnometer: A 1000ml pycnometer for aggregates finer than 6.3mm to measure specific gravity.
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Airtight Containers: Containers with same capacity as basket to store the aggregate sample.
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Shallow Trays: Shallow trays to dry and handle the aggregate sample.
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Dry Absorbent Clothes: 2 dry absorbent clothes to remove excess water from the aggregate sample.
Each item is important to ensure relative density specific gravity and absorption tests are accurate.
Testing Procedure for Fine Aggregate
Testing procedure for fine aggregate involves several steps:
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Sample Preparation: Dry the aggregate sample in oven at 110°C ± 5°C for at least 24 hours to achieve constant mass.
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Weigh the Sample: Weigh the dry aggregate sample to 0.1% of the test sample weight.
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Fill Pycnometer: Fill pycnometer with water to 90% of its capacity.
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Add Aggregate: Add the aggregate sample to the pycnometer and stir gently to remove any air pockets.
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Complete Pycnometer: Fill pycnometer with water to the calibration mark.
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Weigh Pycnometer: Weigh the pycnometer with sample and water to 0.1% of the test sample weight.
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Specific Gravity Calculation: Use the following formula to calculate the specific gravity of the sample:
[ \text{Specific Gravity} = \frac{\text{Weight in air}}{\text{Weight of water of equal volume} } ] 8. Absorption Calculation: Use the following formula to calculate the absorption:
[ \text{Absorption} = \frac{\text{Weight of water absorbed}}{\text{Weight of oven dry sample} }
Follow these steps carefully to get accurate results for specific gravity and absorption of fine aggregates.
Test Results Interpretation
Interpreting the results of specific gravity and absorption tests gives you insight into the quality and suitability of the aggregate for construction:
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Specific Gravity Values: High specific gravity values means dense, strong and durable aggregate, low specific gravity values means light and potentially weak aggregate. These values help in assessing the aggregate performance in various construction applications.
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Absorption Values: High absorption values means the aggregate has high water holding capacity, which can affect its performance in concrete or asphalt mixes. Low absorption values means the aggregate is less likely to absorb water, more stable in various conditions.
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Apparent Specific Gravity: This is the weight of aggregate particles to the weight of water of same volume, excluding the aggregate pores space within the particles. Used to calculate the volume of aggregate in different mixes.
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Bulk Specific Gravity: This is the weight of particles to the weight of water of same volume, including the aggregate pores space within the particles. Used to calculate the volume of aggregate in various mixes.
When you interpret the test results, also consider other mechanical properties of the aggregate like crushing, impact and abrasion values. This will ensure the aggregate meets the requirements of the project.
Now you can decide on the quality and suitability of the aggregate for your construction.