ROCK TESTING

Dry Density Test of Rock

The Dry Density Test of rock determines the mass of oven-dried rock per unit volume. By eliminating the variable of natural moisture content, this test provides a standardized measurement of the rock's inherent compactness and solid material density.

📷 Laboratory Drying Oven and Rock Core Specimens

Test Objectives

  • Determine true dry density without moisture interference
  • Evaluate the degree of weathering and mineralization
  • Calculate critical indices like void ratio and porosity

Project Application

  • Assesses bearing capacity for foundations on bedrock
  • Supports stability analysis for tunnels, dams, and excavations
  • Evaluates rock quality for use as a construction material

Structural Integrity

  • Identifies porous or fractured zones within rock strata
  • Evaluates the long-term durability of rock under load
  • Supplies essential parameters for safe and precise design

Technical Results

  • Dry Density ($\rho_d = M_{dry} / V$)
  • Correlation with compressive strength ($q_u$)
  • Benchmarking against known lithological standards
📷 Mass measurement of oven-dried rock cores

A rock's dry density is a direct indicator of its structural competence. In our laboratory, specimens are oven-dried to a constant mass at 105°C to ensure all interstitial moisture is removed.

The volume is then measured with high-precision calipers for core samples, or via hydrostatic weighing for irregular fragments. This data allows our engineers to identify if the rock mass is dense and competent or if it exhibits high porosity—a factor that could lead to water absorption and reduced strength over the lifespan of your structure.

Desiccation Analysis

Our Methodology

  • 1 Oven-drying specimens at 105°C until constant mass is achieved
  • 2 High-accuracy volume measurement of dried specimens
  • 3 Precise computation of dry density relative to rock type
  • 4 Detailed report generation with geotechnical interpretations

More Services

Ground Improvement Technique – Lime Pile Ground Improvement Technique – Stone Column Soil Nailing Water Absorption Test of Rock Water Content Test of Rock Specific Gravity Test of Rock Density Test of Rock Point Load Index (PLI) Test of Rock Unconfined Compressive Strength (UCS) Test of Rock Hydrometer Analysis Chemical Testing of Soil & Water Free Swell Index (FSI) Test Unconfined Compression Strength (UCS) Test of Soil Heavy Compaction (Modified Proctor) Test Light Compaction (Standard Proctor) Test Shrinkage Limit (SL) Test of Soil Plastic Limit (PL) Test of Soil Liquid Limit (LL) Test of Soil Dry Sieve Analysis of Soil Specific Gravity of Soil Wet Sieve Analysis Permeability & Swelling Pressure Tests CONSOLIDATION TEST Direct Shear Test CBR-UNSOAKED CBR-SOAKED STANDARD & MODIFIED PROCTOR TEST ERT-ELECTRICAL RESISTIVITY TOMOGRAPHY SAND REPLACEMENT CORE CUTTER TEST FIELD CBR Modulus of Subgrade Reaction (k-value) Plate Load Test (PLT) Rock Core Drilling STANDARD PENETRATED TEST (SPT)
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