It is the space between the individual particles in a unit volume of the aggregate mass and is not occupied by the solid mineral matter.Voids within the particles, either permeable or impermeable are not included in the voids for the determination of bulk density by this method. It is similar in nature to the fine aggregate specific gravitytest. Then the loose bulk density of the aggregate material can be computed by using the relation; Now for the determination of the compacted bulk density, the only difference is in filling the container. 1) Apparatus required for the test. IN-PLACE DENSITY T85_short_10.docx E&B/ID 16-1 Pub. Bulking of Sands for Various Moisture Contents6. Density is an important parameter for aggregate. Within the text, inch-pound units are shown in brackets. Report. It also depends upon the size, distribution and shape of the particles. From the experiment performed we came to know that the bulk-density of a material in compacted form is greater than the bulk-density of a material in loose form. Bulk density also indicates the compactive effort required to compact the concrete. This test method is applicable to aggregates not exceeding 125 mm [5 in.] Sorry, your blog cannot share posts by email. Brazilian Portuguese, More C09.20 Standards Usually increase in bulk density should be above 15% for coarse aggregate and should be below 15% for fine aggregate, But in our results it is 11.20% for fine aggregate and 11.48% for coarse aggregate. Limits of Deleterious Materials (Percentage by Weight, Maximum)5. This test method is applicable to aggregates not exceeding 125 mm [5 in.] Rodding the aggregates. Sandy soils are more prone to high bulk density. For a coarse aggregate, a higher bulk density means that there are few voids which are to be filled by the fine aggregate and cement. This percentage of voids affects the grading of the aggregates which is important in high strength concrete. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 4 4 4 f > g> Apparatus - The apparatus shall consist of the following: Balance -A balance or scale of capacity not less than 3 kg, readable and accurate to O-5 g and of such a type and shape as Where Gs = specific gravity of coarse aggregate and their value is 2.65. Further, aggregates in hauling units and stockpiles usually contain absorbed and surface moisture (the latter affecting bulking), while this test method determines the bulk density on a dry basis. The greater the bulk-density the less are the voids present and the more is the compactive effort required. As per the definition given in the ‘IS: 2386 (Part III) – 1963’, (Indian Standard- Methods of Test for Aggregates for Concrete – Specific Gravity, Density, Voids, Absorption and Bulking), the specific gravity of coarse aggregates is the weight of the aggregates dried to constant weight in an oven at 100°C divided by … Fill the container about one-third full and level the surface with the fingers. Here, the Standard test method for determining the bulk density of aggregates is given in ASTM C 29 (AASHTO T 19). (ASTM C-127-04) Scope & Significance: In this test method we determine the relative density (i.e. Loose density of aggregate test method covers the determination of bulk density unit weight of aggregate in a pacted or loose condition and calculated voids between particles in fine coarse or mixed aggregates based on the same determination PROCEDURES 4.1 Determining Unit Mass (Weight)—Loose Method: 4.1.1 Coarse Aggregate: 4.1.1.1 Place the sample on a smooth, flat surface and mix thoroughly. The bulk density or unit weight of aggregate is the mass or weight of the aggregate that required to fill a container of a specified unit volume.It is generally expressed by kg/liter. The main purpose of adding sand in concrete is to minimise the segregation of concrete and to fill out the pores between the cement and coarse aggregate. Product Details. 1.1 This test method covers the determination of bulk density (“unit weight”) of aggregate in a compacted or loose condition, and calculated voids between particles in fine, coarse, or mixed aggregates based on the same determination. Further, aggregates in hauling units and stockpiles usually contain absorbed and surface moisture (the latter affecting bulking), while this test method determines the bulk density on a dry basis. ). Standard test method for the determination of relative density (i.e. For this test procedure it is sufficiently accurate to accept the density of water at room temperature to be 998 kg/m 3 (62.3 lb/ft3). Product Details. 2. An exception is with regard to sieve sizes and nominal size of aggregate, in which the SI values are the standard as stated in Specification E11. [CDATA[ ... Procedure:-Coarse aggregates is passing IS sieve 12.5 mm and retained on 10 mm (Approx 6.5 kg for two trials). 4.1.1.2 Place the 0.01 m3 (0.5 ft.3) measure on a level surface near the sample. Bulk density can be used to calculate soil properties per unit area (e.g. Bulk Density of aggregate; Stripping value of aggregate; Sieve Analysis of Coarse & Fine Aggregate (IS 2386 – Part 1) Apparatus. The documents listed below are referenced within the subject standard but are not provided as part of the standard. Your email address will not be published. News List. As per the definition given in the ‘IS: 2386 (Part III) – 1963’, (Indian Standard- Methods of Test for Aggregates for Concrete – Specific Gravity, Density, Voids, Absorption and Bulking), the specific gravity of coarse aggregates is the weight of the aggregates dried to constant weight in an oven at 100°C divided by its absolute volume including the natural voids within the aggregate … Related Products For a coarse aggregate, a higher bulk density means that there are few voids which are to be filled by the fine aggregate and cement. (adsbygoogle = window.adsbygoogle || []).push({}); Rodding Procedure 9.1 Determine and record the mass of the empty measure to the nearest 0.05 kg [0.1 lb]. If the bulk density in terms of saturated-surface dry (SSD) condition is desired, use the exact procedure in this method, and then calculate the SSD bulk density by the following formula: Where: 3 M SSD =bulk density in SSD … Note down the dimensions and empty weight of the measuring contai ner and compute its volume. Next fill the container two-third full and again rod it with 25 strokes of the temping rod. Plain & Reinforced Concrete Experiments 1, Quantitative Section : GMAT Sample Problem Solving Ability, Transportation, Highways, Tunnels & Roads Books. // ]]> The greater the bulk-density the less are the voids present and the more is the compactive effort required. Bulk Density of aggregate; Stripping value of aggregate; Sieve Analysis of Coarse & Fine Aggregate (IS 2386 – Part 1) Apparatus. So the percentage increase in the Bulk-density of Chenab sand is 13.16 and is greater than all of the samples. Bulk-density depends upon how densely the aggregate is packed. 13:45. 4.1 This test method is often used to determine bulk density values that are necessary for use for many methods of selecting proportions for concrete mixtures. Mold diameter must be at least three times the maximum aggregate size unless wet sieving is conducted according to … A procedure is included for computing the percentage of voids between the aggregate particles based on the bulk density determined by this test method. For a coarse aggregate, a higher bulk density means that there are few voids which are to be filled by the fine aggregate and cement. Dry Loose Bulk Density Of Coarse Aggregate. The appropriate quantity may be found conveniently by filling the cylindrical measure … 4.3 A procedure is included for computing the percentage of voids between the aggregate particles based on the bulk density determined by this test method. Compaction means to reduce the air voids by some mechanical process. //

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