The material specifications for a softball field should align with those used in road construction. Natural turf materials must meet the standards required for garden planting, while synthetic materials should also comply with environmental protection regulations.
**Natural Grass Materials**
1) **Soil Quality**: The soil used for natural turf should be sandy and well-graded, ensuring good water and air permeability. It should drain quickly after rainfall, preventing water accumulation on the surface and maintaining a stable grass bed that supports healthy seedling growth.
2) **Grass Seedlings**: The quality of natural grass seedlings should follow the guidelines outlined in the construction and maintenance standards for football fields.
**Artificial Turf Field Materials**
1) The length of the artificial grass blades should exceed 4 cm, with no more than 1 cm exposed above the surface.
2) In artificial turf installations, the base layer can be filled with sand, while the top layer must be composed of black crumb rubber.
**Artificial Turf Base Material**
Artificial turf can be installed on a base made from road construction materials such as asphalt concrete or cement concrete, ensuring durability and stability.
**Soil Material Requirements**
The base of a softball field is typically constructed using artificially treated soil. Due to the high-performance requirements, it is often difficult to meet the standards of natural soil or mixed-colored raw materials. The following are the key specifications for soil:
**1. Soil Particle Size Distribution Table**
| Sieve (mm) | 10 | 5 | 2 | 1 | 0.5 | 0.25 | 0.075 |
|------------|--------|--------|--------|--------|--------|--------|--------|
| Throughput (%) | 100 | 83–98 | 68–79 | 57–71 | 45–57 | 26–33 | 9.8–11.6 |
**2. Soil Color**: The soil should be brownish-yellow or orange-red, produced by processing natural soil through sintering, crushing, and adding appropriate additives.
**3. Plastic and Liquid Limits**:
- Plasticity Index: 8–12
- Liquid Limit: 30–35
**4. Dry Density**: 1.6–1.7 g/cm³
**5. Soil Additives**:
- The maximum amount of curing agent should be used as needed.
- Soil must not contain any dyes or pollutants that could harm the environment.
**Gravel Material Requirements**
- Maximum particle size: 10 cm
- Particle content below 5 mm should not exceed 30% by volume.
- Clay content should not exceed 10% of the mass of particles smaller than 5 mm.
These detailed specifications ensure that the softball field provides an optimal playing surface, combining durability, safety, and environmental responsibility.
Electric Shaver,3 In One Shaver Set,Rechargeable Electric Shaver,Electric Floating Shaver
ZHEJIANG SHENGFA ELECTRIC APPLIAMNCES CO.,LTD , https://www.sfelectricappliances.com