This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8514. To derive an appropriate equation, lets assume a blend of. Observation table for specific gravity of aggregate finer than 6. Fine aggregate procedure ii is all aggregate passing the no. A balance of capacity not less than 3kg,readable and accurate to 0.
Use a sample splitter or quartering cloth to reduce the. Measurement of water permeability of compacted asphalt paving mixtures. Specific gravity and absorption of fine aggregate nebraska. Relative density specific gravity is also used in the computation of voids in aggregate in test method c29c29m and in. The function of the coarse aggregate is to act as the main loadbearing component of the concrete. Some lightweight shales not used in hma production can have specific gravities near 1. Aashto t84 c128 specific gravity fine aggregate duration. For a particular aggregate type or source, fine aggregate specific gravities can be slightly higher than coarse aggregate specific gravities because as the aggregate particles get smaller, the fraction of pores exposed to the aggregate surface and thus excluded from the specific gravity calculation because they are waterpermeable increases. National academies of sciences, engineering, and medicine.
Specific gravity and absorption of fine aggregate using automatic vacuum sealing corelok method idaho it14408 1 scope 1. Specific gravities can vary widely depending upon aggregate type. This standard is issued under the fixed designation c 127. What various tests are done for the water, fine aggregates. Improved test methods for specific gravity and absorption. Specific gravity and water absorption tests on aggregates. Astmspecific gravity and absorption of aggregate by. North dakota department of transportation, materials and research. Download a pdf of improved test methods for specific gravity and absorption of coarse and fine aggregate by the national academies of sciences, engineering, and medicine for free. This test method describes the procedure used for determining bulk specific gravity saturated surfacedry basis and absorption after prescribed soaking of fine aggregate proposed for use in portland cement concrete.
Determining specific gravity of aggregates im 307 iowa dot. So the determination of specific gravity of fine aggregate is very essential. Specific gravity may be expressed as bulk specific gravity gsb, bulk specific gravity, saturated surface dry gsb ssd, or apparent specific gravity gsa. Sfn 2199 72019 pit location laboratory number owner project number sampled from pcn type of material submitted by date received. Specific gravity, density, voids, absorption and bulking. Fine aggregate specific gravity sample and pycnometer. The fine aggregate specific gravity test figure 1 is used to calculate the specific gravity of a fine aggregate sample by determining the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. Specific gravity is the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water. Test equipment for determining specific gravity of aggregate.
Fundamentals of concrete mix design table of contents. The specific gravity of an aggregate is considered to be a measure of strength or quality of the material. The specific gravity of sands is considered to be around 2. Use a sample splitter or quartering cloth to reduce the sample to a. As preconized by siddique 2010b, the bulk specific gravity values of the mswi ash ranges from 1. Relative density specific gravity is also used in the computation of voids in aggregate in test method c29c29m. Method of test for specific gravity and absorption of fine aggregate. The absolute volume of a 90lb sample of the aggregate is. Bulk ssd specific gravity for placitas fine aggregate t84 bulk ssd sp gr phunque bulk ssd sp gr 2.
Specific gravity and water absorption of fine aggregate by pycnometer duration. Specific gravity of fine aggregate can be defined as the ratio of the weight of given volume of coarse aggregate to the weight of given volume of distilled water. Determination of specific gravity of fine aggregates. Determining the specific gravities of coarse aggregates. Obtain approximately g of aggregate material passing the no.
California test methods version selection caltrans. This method has been designed to eliminate the inherent guess work built into astm c128 and aashto t84 the current cone and tamper methods in use today. Specific gravity, density, voids, absorption and bulking mechanical properties soundness measuring mortar making properties of fine aggregate alkali aggregate reactivity petrographic examination 0. The specific gravity of aggregates normally used in construction ranges from. Aggregates having low specific gravity are generally weaker than those with higher specific gravity values. Determining the optimum asphalt binder content of an opengraded friction course mixture using the pie plate method. Pdf determination of specific gravity and water absorption of. Astm c 17 change in grading resistance to degradation during mixing uncompacted void content workability of fresh astm c 1252 aashto t 304 uncompacted voids and of fine aggregate concrete specific gravity values bulk density mix design calculations. Coarse aggregate procedure i represents aggregate retained on the no. Quantitative determination of asphalt content from asphalt paving mixtures by the ignition method. Aggregates having low specific gravity are generally. Ts1c t 841 aashto standard method of test for specific gravity and absorption of fine aggregate aashto designation.
The fine aggregate serve the purpose of filling all the open space in between the coarse particles. Measuring mortar making properties of fine aggregate. Specific gravity relative density of a blended aggregate the specific gravity of a blended aggregate is not simply the weighted average of the specific gravities of the individual components. Some deleterious particles are lighter than the good aggregates. Specific gravity of fine aggregatetest on aggregates.
Specific gravity of coarse aggregate linkedin slideshare. The ratio of the weight in air of a unit volume of aggregate at a stated temperature to the weight in air of an equal volume. For example, the specific gravity of a dry coarse aggregate gs is 2. Improved test methods for specific gravity and absorption of coarse and fine aggregate. Bulk specific gravity an overview sciencedirect topics. State materials office florida department of transportation. Specific gravity of fine aggregate sand is the ratio of the weight of given volume of aggregates to the weight of equal volume of water.
Fine aggregate is used in many fields in sites for many purposes. The ratio of the weight in air of a unit volume of aggregate, including the weight of water within the voids filled to the extent achieved. Specific gravity flask for fine aggregate the phunque flask is the key element in a newly developed method for conducting specific gravityabsorption determinations for aggregate. Specific gravity is defined as the ratio of weight of aggregate to the weight of equal volume of water. Fine aggregate degradation index of aggregate quality. This method of test covers the procedures for determining the specific gravity and absorption of aggregates. This method determines after 15 h in water the bulk specific gravity and the apparent specific. This procedure covers the determination of specific gravity and absorption of coarse aggregate in accordance with aashto t 8510. Methods of test for aggregates for concrete, part 3. It is similar in nature to the coarse aggregate specific gravity test figure 1.
Specific gravity of fine aggregate can be defined as the ratio of the weight of given volume of coarse aggregate to. Fine aggregate specific gravity pavement interactive. Specific gravity and absorption of fine aggregate using. It is the measure of strength or quality of the specific material. A weight of empty basket in water a weight of aggregate and basket in water c weight of ovendried aggregate in air. Aggregates having low specific gravity are generally weaker than those with high specific gravity. A twoquart pycnometer is used for coarse aggregates, and a onequart pycnometer is used for fine aggregate. The current method of specific gravity and absorption of coarse aggregate testing is based on the aashto t 85 and astm c127 standards. Effect of specific gravity on aggregate varies the weight. Chapter 5 practical significance of aggregate specific gravity test results. Determination of specific gravity of fine aggregates the constructor.