In Part 2 of this 3-part series, we addressed how to properly prepare bulk field samples for testing in the lab, necessary equipment, and helpful tips. Now that you understand how to perform all the pre-work on samples …

When dealing with concrete, the aggregates are the materials that are inert in nature and impart strength to the mix. However, the overall concrete strength and shrinkage properties as well as its workability lean on the gradation of aggregates used, be it fine aggregates or coarse aggregates.

Rugged & Reliable Aggregate Weighing Solutions. For many companies, knowing the precise amount of crushed stone, asphalt, sand, coal, or even gravel going in our out of your facility is a must. Operating an efficient processing facility, quarry, or pit requires the smooth flow of truck traffic and accurately accounting for material sold.

Question: A 3-cy wheel loader will be used to load trucks from a quarry stockpile of uniform aggregates ofhe haul distance will be negligible. The aggregate has a loose unit weight of 2,800 lb/cy. Estimate the loader production in tons based on a 50-min-hour efficiency factor. Use a conservative cycle time and fill factor.

Accordingly, readers should make particular note that the term "weight" has been replaced with "mass," and "unit weight" has been replaced with "density" when used in reference to the absolute volume aggregates occupy in concrete, and with "bulk density" when used in reference to aggregates, such as the mass per unit volume ...

Flakiness and Elongation Index Test are very important tests to be performed on aggregate in the laboratory. This test gives the percentage of flaky and elongate aggregate present in the total aggregate sample. Aggregate shape, size, and surface texture majorly affect the properties of freshly mixed concrete more than the properties of hardened ...

🕑 Reading time: 1 minuteSpecific gravity of fine aggregate (sand) is the ratio of the weight of given volume of aggregates to the weight of equal volume of water. The specific gravity of sands is considered to be around 2.65. …

Gilson Insights blog: Best practices for sample preparation of coarse aggregate for sieve analysis. We highlight some tips and equipment must-haves.

HMA bulk specific gravity is needed to determine weight-volume relationships and to calculate various volume-related quantities such as air voids and voids in mineral aggregate (VMA).

The fine aggregate specific gravity and absorption for mineral aggregates used in asphaltic concrete, other than asphaltic concrete friction course, shall be determined on pass No. 4 material.

The abrasion Test measures aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. This test is suggested by AASHTO T 96 or ASTM C 131: Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in Los Angeles Machine. The aggregates are used for the surface course of the …

These sample sizes are standard for aggregate testing but, due to equipment restraints, samples may need to be partitioned into several "subsamples." For example, a gradation that requires 100 kg (220 lbs) of material would not fit into a large tray shaker in one batch.

For a fast and convenient method of cleaning and collecting contents for weighing separated fractions in aggregate equipment, our bestselling Gilson TSA-167 Clean-N-Weigh Accessory is the ideal choice and its kept in inventory. Experience a superior performance with this practical product for accurate analysis with sturdy painted-steel …

This sieve analysis technique, crucial for both sieve analysis of coarse aggregate and sieve analysis of fine aggregate, involves the layering of sieves with different grades of sieve opening sizes.

The leakage is prevented by having a washer between the cap and the jar. While closing the jar, it is screwed till the mark so that the volume of the pycnometer will remain constant throughout the calculation. Mentioned …

The specific gravity of coarse aggregate determines its density and weight to volume ratio, which can impact the overall strength and durability of concrete or asphalt mixtures and it provides valuable information for proportioning and designing concrete mixes as well as evaluating the potential for segregation and bleeding.

The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Crushing value is a measure of the strength of the aggregate. The aggregates should therefore have …

The ' aggregate crushing value test ` gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Aggregate crushing value is defined as the percentage by weight of the crushed (or finer) material obtained when the test aggregates are subjected to a specified load under …

The Sieve analysis test is nothing but the gradation test, in which gradation of particle (distribution of aggregates by size, within given sample) is find out. The gradation is also required to find out suitability of …

Sieve analysis of fine aggregates is one of the most important tests performed on-site. Aggregates are inert materials that are mixed with binding materials such as cement or lime for the manufacturing of mortar or concrete. It is also used as fillers in mortar and concrete. Aggregates size varies from several inches to the size of the …

Test Procedure. Fine aggregates. Take a 1kg fine aggregate test sample. Arrange the IS sive in descending 10mm, 4.75mm, 2.36mm, 1.18mm, 600 microns, 300 microns, 150 microns and 75 microns. Now fill the sample to the highest sieve and sieve well for up to 10 minutes. After completion of sieving, then weigh the aggregates retained in each sieve ...

Take 2kg of sample and repeat the steps as performed for coarse aggregate, but with the recommended sieves for fine aggregates. Note the weight of material in each sieve and find the cumulative percent retained. From the cumulative percent retained, calculate the fineness modulus for coarse and fine aggregates.

Shape tests on coarse aggregates such as flakiness index and elongation Index, its importance in concrete construction, methods of determination is discussed.

Aggregate Impact Test. Read definition, apparatus, IS code, procedure, observations, formula, result and lab report about aggregate impact value test.

The fine aggregate specific gravity test 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. It is similar in nature to the coarse aggregate specific gravity test.

Gilson's blog includes tips and tricks for testing gradation of aggregates to determine particle size distribution from sample splitting to sieve analysis.

The Los Angeles Abrasion Test is carried out on aggregates to determine the hardness and abrasion characteristics, i.e. ability to resist degradation due to imposed wheel load. The principle of this test is to determine the percentage of wear due to deliberate rubbing action between aggregates. Steel balls are used as an abrasive […]

Testing equipment that is used to determine the unit weight of aggregates and fresh concrete. Unit weight buckets are available in both ASTM compliance and non-ASTM.

Question: When it comes to determining the moisture content of the course and fine aggregates in the Specific gravity and absorption of fine and course aggregates lab experiments, which values should I use? I know the mc= (weight of moist sample - weight of dry sample)/ weight of dry

Gilson's Insights Blog article discusses the importance of size, shape, and texture of aggregate, including the tests and equipment needed.