This is an excellent material for the foundation of roads and slabs, as well as for backfilling. Knowing the sizes or grades of crushed stone and gravel is vital to help you decide the size you are going to buy, considering the intended use. Remember, the various projects such as drainage, driveway, patio, roads, decoration work, etc. require different sizes of gravel and crushed stone.
This post has the common sizes or grades of gravel and crushed stone and will also tell you what size or grade to buy for what job. Gravel is loose, fragmented rocks formed by natural erosion and erosion. It is usually harvested in lakes, oceans, or river beds and has sizes ranging from granules to rocks. Due to gradual erosion, gravel has a soft shape and often has roughly rounded edges or shapes.
On the other hand, crushed stones are manufactured, that is, each of these types attracts different prices, and they have their pros and cons. Make sure you know exactly what you need. In addition, different rocks come in different colors, and the color you select influences the total cost you will incur. In the United States, however, gravel can also mean crushed stones that are less than two inches in size but larger than sand.
But the opposite is not true, that is, gravel is classified according to the size or diameter of the stone particles, and there are ten primary sizes and several other special categories. The exact name of each size may vary from place to place (country or state) or from one supplier to another. However, the particle diameter and uses are very similar, as is their application. Secondly, grades do not tell you which stone was crushed, that is, thirdly, as a rule, the smaller the grade number, the coarser or larger the size of the gravel particles, and the larger the number, the finer it will be.
However, this does not apply to the two single grades (or to some special categories), as we will see shortly. Let's take a look at popular gravel sizes or grades. #67 aggregate is a type of gravel that consists of angular pieces of rock no larger than 3/4 inch in diameter. It is often used in landscaping projects such as driveways and walkways where a compact subbase is needed.
Some of its uses include avoiding the use of these screens in muddy areas, as they will get dirty quickly. For example, crushed limestone will have a different price than crushed granite, marble, quartz, bluestone, or white gravel. The presence of stone dust means that it is compactable and becomes stable and solid. The Udden-Wentworth scale classifies gravel into granules with particle sizes from 2 mm to 4 mm (0.079-0.157 inch) or pebbles with particles from 4 mm to 64 mm (0.2-2.5 inch).
Granulated gravel is subdivided into very fine and fine categories while pebble gravel has three subcategories: small (4-8 mm), medium (8-20 mm), and large (20-64 mm). Finally, the Udden-Wentworth scale considers unlithified cobblestones (which exist as individual pieces and not sedimented together) and rocks as gravel. Cobblestones measure 64 mm to 256 mm (2.5 to 10.1 inch) and boulders larger than 256 mm (10.1 inch). When purchasing any grade or size of gravel, always refer to the supplier's description.
Therefore, check if your provider uses the same chart as we gave you earlier. Finally, if not explicit, be sure to ask suppliers for actual sizes as different sizes have different uses.