ASTM D2487

Definition

ASTM D2487 is the standard classification of soils for engineering purposes, developed by the American Society for Testing and Materials. This standard provides a systematic approach to classify soil types based on their physical and chemical properties, which is crucial for understanding how different soils behave in construction and geotechnical engineering projects. By utilizing ASTM D2487, engineers can apply appropriate design and construction practices based on the soil's characteristics.

5 Must Know Facts For Your Next Test

1. ASTM D2487 outlines the procedures for determining the classifications of soils based on laboratory tests and field observations, ensuring consistency in soil evaluation.
2. The standard divides soils into two major categories: coarse-grained soils (gravel and sand) and fine-grained soils (silt and clay), helping engineers understand soil behavior more effectively.
3. ASTM D2487 includes specific criteria for determining the plasticity index of fine-grained soils, which is vital for predicting how these soils will perform under load.
4. Using ASTM D2487 allows for clear communication among engineers, contractors, and other stakeholders involved in construction projects by standardizing soil classification terminology.
5. The results from ASTM D2487 classification can significantly impact engineering decisions related to site development, foundation design, and construction methods.

Review Questions

• How does ASTM D2487 contribute to the understanding of soil behavior in geotechnical engineering?
  • ASTM D2487 provides a framework for classifying soils based on their properties, allowing engineers to predict how different soil types will behave under various conditions. By categorizing soils into coarse and fine-grained groups and evaluating properties like plasticity index, engineers can make informed decisions about foundation design and construction methods. This understanding is crucial when designing structures to ensure safety and performance.
• Compare the classifications provided by ASTM D2487 with those from USCS and AASHTO. How do these systems interact?
  • ASTM D2487 focuses on classifying soils for engineering purposes using systematic procedures that align with the USCS and AASHTO systems. While USCS uses similar parameters like grain size and plasticity to classify soils into major groups, AASHTO emphasizes factors impacting highway performance. All three classification systems serve to enhance communication among professionals in civil engineering by providing standardized terminology, but they may prioritize different aspects depending on project requirements.
• Evaluate the implications of using ASTM D2487 for large-scale construction projects in varying soil conditions. What potential challenges could arise?
  • Using ASTM D2487 in large-scale construction projects ensures that engineers have a reliable method for classifying diverse soil types across different sites. However, challenges can arise if local conditions deviate from standardized classifications due to unique geological features or unexpected soil behaviors. Inaccurate assessments may lead to inadequate foundation designs or construction practices that fail to address site-specific issues. Therefore, engineers must complement ASTM D2487 with thorough site investigations to mitigate risks associated with varying soil conditions.

Related terms

USCS: The Unified Soil Classification System is a soil classification system that groups soils based on their particle size and plasticity, widely used in engineering applications.

AASHTO: The American Association of State Highway and Transportation Officials provides a classification system for soils primarily used in highway engineering, focusing on factors that affect pavement performance.

Soil Mechanics: A branch of engineering that deals with the behavior of soil under various conditions, including stress, strain, and moisture, which is essential for foundations and earth structures.