Latest Civil Engineering Articles
Factors Affecting Soil Compaction
As water is added to a soil ( at low moisture content) it becomes easier for the particles to move past one another during the application of the compacting forces. As the soil compacts the voids are reduced and this causes the dry unit weight ( or dry density) to increase. Increased compactive effort enables greater dry unit weights to be achieved
Comparison of Coarse-Grained and Fine-Grained Soils for Engineering Use
The main groups of soils for engineering purposes are coarse-grained soils — sand and gravels — and fine-grained soils — silts and clays. It is important to know the differences between fine-grained and coarse-grained soils so that to make a decision related to soil composition and particle sizes.
Unified Soil Classification System - USCS Chart
The Unified Soil Classification System is based on the airfield soil classification system developed by Casagrande during World War II. With some modification it was jointly adopted by several U.S. government agencies in 1952. Additional refinements were made and it is currently standardized as ASTM D 2487-93. It is used in the U.S. and much
AASHTO Soil Classification System - AASHTO Chart
The AASHTO Soil Classification System classifies soils into seven primary groups, named A-1 through A-7, based on their relative expected quality for road embankments, sub-grades, sub-bases, and bases. Some of the groups are in turn divided into subgroups, such as A-1-a and A-1-b. Furthermore, a Group Index may be calculated to quantifyHospital Waste - Definition, Risks and Segregation Guidelines
Hospital waste or Biomedical waste are any kind of waste that contains infectious or potentially infectious material. These materials can include waste generated by healthcare facilities like clinics, hospitals, laboratories, medical research facilities, and veterinary clinics. Medical waste can contain bodily fluids like blood or other contaminants.
