ASTM C-128 / AASHTO T-84
Absorption of Fine Aggregate Test Set For determining the water absorption of fine aggregate at saturated surface dry.
Consist of :
- Cone : Brass, 40 mm i.d; the top 90 mm i.d at the bottom, 75mm heigh
- Tamper : Machine steel, plated, 340 gr weight, 25 mm dia.
- Mixing Bowl : Stainless steel, round type, 25 cm diameter
- Glass Plate : Glass 10 mm thick, 30 x 30 cm
- Volumetric Flask : 500 ml capacity, heat resistance glass
- Spatula : Stainless blade, 150 mm length, plastic handle
- Dimension (l x w x h): 40 x 40 x 30 cm/ Gross Weight: 7 Kg
- Standard supply with instruction manual book.
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Absorption of Fine Aggregate Test Set
Specific Gravity is the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. Water, at a temperature of 73.4°F (23°C) has a specific gravity of 1. Specific Gravity is important for several reasons. Some deleterious particles are lighter than the “good” aggregates. Tracking specific gravity can sometimes indicate a change of material or possible contamination. Differences in specific gravity may be used to separate the deleterious particles from the good using a heavy media liquid.
Specific gravity is critical information for the Hot Mix Asphalt Design Engineer. This value is used in calculating air voids, voids in mineral aggregate (VMA), and voids filled by asphalt (VFA). All are critical to a well performing and durable asphalt mix. Water absorption may also be an indicator of asphalt absorption. A highly absorptive aggregate may result in a low durability asphalt mix. In Portland Cement Concrete the specific gravity of the aggregate is used in calculating the percentage of voids and the solid volume of aggregates in computations of yield. The absorption is important in determining the net water-cement ratio in the concrete mix. Knowing the specific gravity of aggregates is also critical to the construction of water filtration systems, slope
stabilization projects, railway bedding and many other applications.
This test method determines the specific gravity of fine aggregates that have been soaked for a period of 15-19 hrs. The determinations that may be made from this procedure are identical to those made in AASHTO T 85 (Specific Gravity and Absorption of Coarse Aggregate).