COLOUR STANDARD CHART AZA0889

The AZA0872 Dynamic Cone Penetrometer (DCP) from Azalab is a robust, field-proven instrument designed for rapid in-situ evaluation of soil strength, stiffness, and compaction. It is extensively used by civil engineers, geotechnical consultants, and construction teams for pavement design, quality control, and site investigation works.

The DCP test provides a fast and economical method to assess the strength of subgrades, sub-bases, and granular base course layers, with results that can be directly correlated to California Bearing Ratio (CBR) values. This eliminates the need for time-consuming laboratory testing or undisturbed soil sampling, enabling immediate decision-making at site.

The AZA0853 Liquid Limit Device with Counter from AZALAB is a precision-engineered instrument used for determining the liquid limit of soils in accordance with the Casagrande method. This test is a fundamental component of soil classification and geotechnical investigation, providing critical insight into the plasticity, compressibility, and shear strength of fine-grained soils.

Designed for reliable, repeatable, and standardized testing, the AZA0853 is widely used in geotechnical laboratories, civil engineering departments, construction quality control labs, and academic institutions.

---

Principle of Liquid Limit Test (Casagrande Method)

The liquid limit is defined as the water content at which soil transitions from a plastic state to a liquid state. In practice, it is determined as the moisture content at which a standard groove cut in the soil sample closes over a length of 12.5 mm under 25 blows of the liquid limit apparatus.

The AZA0853 consists of a polished brass cup mounted on an adjustable bracket. The cup is repeatedly raised and dropped from a fixed height of 1 cm onto a hard rubber base by means of a manually operated cam mechanism. A built-in mechanical counter accurately records the number of blows, ensuring compliance with testing standards and reducing operator error.

The AZA0868 Precision Proctor Needles (Spring Type) from Azalab are designed for rapid, on-site estimation of soil compaction and moisture condition. This portable instrument provides a practical alternative to full laboratory Proctor testing for preliminary assessment and quality control, particularly on cohesive and semi-cohesive soils encountered in embankments, subgrades, and trench backfills. The instrument employs a calibrated, spring-loaded plunger to measure penetration resistance directly (0–40 kg range). Two graduated stems allow accurate tracking of penetration depth, while a comprehensive set of interchangeable needle tips enables testing across a range of soil densities and particle characteristics. Applications

• Field assessment of soil compaction
• Estimation of optimum moisture condition
• Subgrade, fill, and trench inspection
• Construction quality control checks
• Geotechnical and educational field investigations

The AZA0863 Standard Compaction Test Apparatus from Azalab is designed to perform the Standard Proctor Compaction Test, a fundamental geotechnical laboratory procedure used to determine the Maximum Dry Density (MDD) and Optimum Moisture Content (OMC) of soils. These parameters are essential for ensuring proper soil compaction in the construction of roads, embankments, foundations, and other earth structures. This apparatus simulates light compaction effort typically applied in the field and provides reliable, repeatable results for laboratory quality control and design verification. Purpose & Principle The Standard Compaction Test establishes the relationship between soil moisture content and dry density under a standard compactive effort. Soil samples are compacted in layers within a cylindrical mould using a specified hammer weight and drop height. By testing at varying moisture contents and plotting a compaction curve, the MDD and OMC are obtained.