Item 4 gravel, also known as Item 4 stone, is a specific blend of crushed stone and stone dust. This mixture typically contains particles ranging from approximately 1.5 inches down to fine dust, creating a dense and highly compactable material. It is widely utilized as a base layer for roads, driveways, patios, and foundations, providing excellent stability and drainage when...
Item 4 stone is a popular aggregate blend often utilized as a base material in various construction projects. Its composition, typically a mix of crushed stone and finer particles, makes it excellent for creating a stable, compactable sub-base for roads, driveways, and building foundations. It helps improve drainage and prevents shifting.
Item 4 stone distinguishes itself by its specific gradation, meaning it contains a wide range of particle sizes from larger crushed stone down to fine dust. This blend allows it to compact very tightly, providing superior stability compared to uniform-sized aggregates like clean stone, which prioritizes drainage over compaction.
While item 4 stone provides an excellent, stable base for driveways, it is not typically recommended as a finished top layer. Its finer particles can create dust and its rougher texture isn't ideal for long-term vehicle or pedestrian traffic. A finer, cleaner aggregate or asphalt is usually preferred for surfacing due to wear.
Item 4 stone is generally not ideal for French drain systems. Its high percentage of finer particles can clog the drain fabric, impeding water flow over time. For effective French drains, a "clean" stone product, like 3/4 inch washed gravel, is much preferred. It allows water to pass through freely without obstruction.
Item 4 stone typically contains a mix of particle sizes ranging from approximately 1.5 to 2 inches down to fine dust or sand. This varied gradation is crucial for its excellent compaction properties. The larger pieces provide structural integrity, while the fines fill voids, creating a dense and stable base layer.
The weight of a cubic yard of item 4 stone can vary based on density and moisture, but it typically ranges from 2,800 to 3,000 pounds. This significant weight is due to its composition of crushed rock and finer aggregates, which compact densely. Always verify with your local supplier for exact specifications.
Item 4 stone can be considered relatively eco-friendly, especially when sourced locally. It's a natural, abundant resource. Its primary environmental impact often comes from the quarrying process and transportation. Reusing and recycling existing item 4, where possible, further enhances its sustainability profile, reducing the need for new extraction.
Proper preparation is crucial before applying item 4 stone. The area should be excavated to the desired depth, cleared of organic matter, and the subgrade compacted thoroughly. Ensuring good drainage and a stable base will maximize the effectiveness and longevity of the item 4 layer, preventing future settlement issues.
Yes, item 4 stone is an excellent material for leveling uneven ground, especially for areas intended for foundations, patios, or driveways. Its varied particle sizes allow it to be spread easily and then compacted densely, creating a firm, stable, and level surface ready for subsequent layers or construction.
The "item 4" designation typically refers to a specific grading specification set by state or local departments of transportation. It defines the range of particle sizes and proportions required for an aggregate to be used as a base course in road construction, ensuring material consistency and performance across projects.