The Expansion Index test is a simple and effective method for predicting swelling potential of compacted soils using the Expansion Index Consolidometer. A soil specimen is compacted into a mold containing a 4 x 1in (101.6 x 25.4mm) ID x H stainless steel ring. After a confining load is applied, the specimen is immersed in water, and volumetric swell is recorded for up to 24 hours. A high expansion index indicates a need to design structures and pavements for expansive soils.
The self-contained design does not require a separate consolidation loading device for testing. After compaction, the specimen is placed in the Consolidometer with a porous stone at each end and loaded with the stainless steel weight. After consolidating for ten minutes, the assembly is immersed in water to initiate the test. The loading weight and top porous stone are a combined weight of 12.6lb (5.7kg), which generates a total pressure of 1lbf/in2 (6.9kPa) on the sample.
Immersed parts are stainless steel or anodized aluminum for durability and corrosion resistance. Included are an anodized aluminum base and collar with stainless steel hold-down rods, dial indicator bracket, stainless steel specimen ring, loading weight, and porous stones. A 5102 Dial Indicator - 0.5in Range x 0.0001in Divisions or 6820 Digital Displacement Indicator - 0.6 x 0.0001in (Range x Resolution) is required for the test (both purchased separately). Additional Porous Stones, Stainless Steel Specimen Rings and Loading Weights are available for more efficient sample preparation. The device conforms to ASTM D4829 and California UBC 29-2.
Dial indicator sold separately. A 0.5in range indicator like this dial or digital indictor is recommended.
Features:
- Simple, compact design
- Corrosion resistant, durable anodized aluminum and stainless steel construction
- Quick test results
Included Items:
- Expansion Index Consolidometer
- Anodized Aluminum Base and Collar
- Stainless Steel Specimen Ring
- Dial Indicator Bracket
- Loading Weight
- 50397012 Porous Stones
| Product Dimensions | 6 x 11in (152 x 279mm) Dia.xH |
Meets Test Methods:
ASTM D 4829
California UBC 29-2
The Karol-Warner 1971 Expansion Index Consolidometer is a reliable and efficient tool for predicting the swelling potential of compacted soils. Built with a simple and compact design, this device offers accurate results and is easy to use.
To conduct the test, a soil specimen is compacted into a mold that contains a 4 x 1in (101.6 x 25.4mm) stainless steel ring. Once the confining load is applied, the specimen is immersed in water, and the volumetric swell is recorded for up to 24 hours. The Expansion Index Consolidometer allows for the identification of expansive soils, indicating the need for specific design considerations for structures and pavements.
One of the remarkable features of this product is its self-contained design, eliminating the need for a separate consolidation loading device. After the compaction process, the specimen is placed in the Consolidometer, with a porous stone at each end. The stainless steel weight is then loaded onto the assembly. Following a ten-minute period of consolidation, the test is initiated by immersing the assembly in water.
The Consolidometer is constructed using stainless steel and anodized aluminum, ensuring durability and resistance to corrosion. The package includes an anodized aluminum base and collar, stainless steel hold-down rods, a dial indicator bracket, a stainless steel specimen ring, loading weight, and porous stones. However, please note that the dial indicator, such as the 5102 Dial Indicator with a 0.5in range or the 6820 Digital Displacement Indicator with a 0.6in range, is sold separately but is recommended for conducting the test.
The Expansion Index Consolidometer conforms to ASTM D4829 and California UBC 29-2 test methods, ensuring its reliability and accuracy. Furthermore, additional porous stones, stainless steel specimen rings, and loading weights are available for more efficient sample preparation.
With its simple design, durability, and quick test results, the Karol-Warner 1971 Expansion Index Consolidometer is a valuable tool for anyone involved in soil engineering and construction. By accurately predicting the swelling potential of soils, it aids in designing structures and pavements that can withstand the challenges posed by expansive soils.