Our Soil and Rock Testing for Construction Projects
Our soil and rock testing services support safe and reliable construction by evaluating the engineering properties of soils, rocks, and aggregates. Using modern laboratory and field testing methods, we ensure accurate results from sample preparation through final analysis. These tests help determine load-bearing capacity, stability, and long-term performance for buildings, roads, and infrastructure projects.
Laboratory Testing of Soils, Rocks, and Aggregates
Water Content Test determines the amount of water present in soil relative to its dry weight. Moisture content directly affects soil strength, compressibility, and load-bearing behavior. It is measured by oven-drying the sample and comparing weight differences.
Grain size analysis identifies soil particle distribution. Coarse particles are separated using dry and wet sieving, while fine particles such as silt and clay are measured using hydrometer analysis. This test is essential for soil classification and design suitability.
Specific gravity test represents the ratio of soil particle weight to water weight. It helps calculate soil density and understand mineral composition. Typical values range from 2.65 to 2.7 for sand and gravel, and up to 2.8 for clay soils.
Liquid limit test defines the water content at which soil changes from plastic to liquid behavior. It is determined using a standard device by counting the number of blows required to close a groove in the soil sample.
The plastic limit indicates the moisture level at which soil begins to crumble when rolled into thin threads. Together with the liquid limit, it helps assess soil plasticity and workability.
Compaction and Strength Testing
The CBR test evaluates soil strength by measuring resistance to penetration. It is performed under soaked and unsoaked conditions to simulate field moisture variations and is widely used for pavement design.
In this method, soil removed from a test pit is replaced with calibrated sand to calculate in-situ dry density. It is suitable for granular and mixed soils where core cutting is not feasible.
In this method, soil removed from a test pit is replaced with calibrated sand to calculate in-situ dry density. It is suitable for granular and mixed soils where core cutting is not feasible.
These values are obtained from compaction tests. Maximum dry density represents the highest achievable soil density, while optimum moisture content is the water level at which this density occurs. Both are critical for earthwork and pavement construction.
Foundation and Load Evaluation Tests
This test determines the maximum load soil can safely support without failure or excessive settlement, ensuring structural safety for foundations and bridge works.
These parameters define soil shear strength. Cohesion represents inter-particle bonding, while the angle of internal friction reflects resistance to sliding. Both are essential for slope stability and foundation design.
Plate load test assesses soil stiffness and bearing capacity by applying load through a rigid plate and measuring settlement. It is used for foundation and pavement design decisions.
Why Choose NKMPV for Testing of Soils, Rocks & Aggregates?
● Accurate and Reliable Results
● Complete Range of Tests
● Advanced Lab & Field Expertise
● Proven for Construction and Infrastructure
● Support from Start to Finish