ASTM D1195/D1195M-21 pdf free download.Standard Test Method for Repetitive Static Plate Tests of Soils and Flexible Pavement Components for Use in Evaluation and Design of Airport and Highway Pavements.
1.1 This test method covers the apparatus and procedure for making repetitive static plate load tests on subgrade soils and compacted pavement components. in either the compacted condition or the natural state, and is to provide data for use in the evaluation and design of rigid and flexible-type airport and highway pavements.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not he exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
4.2 The Lest method requires the use of a loading device? hydraulic jack assembly pushing rigid bearing plates into the test material with instrumentation recording settlement of the plates and the force of the jack against the loading device.
4.3 The test procedure requires the incremental loading and unloading of the rigid plates to prescribed stresses and then holding for a period of Lime to allow the settlement to stabilize. The resuks are plotted on a load settlement curve to determine bearing capacity or modulus of suhgrade reaction.
5. Significance and Use
5.1 Field. in-place repetitive static plate load tests are used for the evaluation and design of pavement structures. Repetitive Static plate load tests are performed on soils and unbound base and subbase materials to determine strain modulus or a measure of the shear strength of pavement components.
6. Apparatus
6.1 Presented below are analog and digital conilgurations with manual and electronic data collection methods. It is intended that either apparatus configuration is suitable for performing all of the test methods presented in Section 11.
6.2 The following apparatus describes the analog or dial gauge system that requires the data to be collected manually.
6.2. 1 Loading Device—A truck or trailer or a combination of both a tractor-trailer, an anchored frame, or other structure loaded with sufficient weight to produce the desired reaction on the surface under test. The supporting points (wheels in the case of a truck or trailer) shall he at least 2.4 in [8 ft] from the circumference of the largest diameter hearing plate being used.ASTM D1195/D1195M pdf download.