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E2835-11 1 2 3 4 5 page sstarting from page current page. The identification was carried out on the basis of displacements recorded during impact test. Posted by Frank Georg Schulz at But before you can use an LWD, you need to make sure that it is calibrated to ASTM E, an international standard for calibrating this type of device.
International standard ASTM E2835-11 for Light Weight Deflectometer HMP LFG
The electronic file may not be reproduced in any way. The method covers the measurement of deflection of the load plate rather than the deflection of the surface of the pavement or foundation layers see Note 1. This completely uniform contact can depict the load plate deflection that is like the deflection of the unbound material’s surface.
Procedia Engineering Volume, Pages sstm Please sign into an account with a subscription to this content, or email for help at support madcad. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Soil compaction quality can be determined by using a light weight deflectometer, a reliable and noninvasive testing device used in a wide range of applications like civil engineering, earthworks, construction, and landscaping. The sensitivity of the dynamic stiffness modulus of the ground in the process of loading and unloading was confirmed.
Newer Post Older Post Home. The values given in parentheses are for information only. No further reproductions authorized. Please login to your authorized staff account to use this feature. Link to Active This link will always route to the current Active version of the standard. This way, you can be sure that you are using a device that can withstand extreme temperatures, dust, vibrations, and rain.
ASTM E Light Weight Deflectometer Calibration | TERRATEST
ASTM grants you a license as follows: Therefore, care must be taken when analyzing the results because the data obtained by the Portable Impulse Plate Load Test may be obtained under substantially different conditions than when a heavy moving wheel load passes over the pavement surface after construction is complete. Some uses of the data include quality control and quality assurance of compacted layers, and for structural evaluation of load carrying capacity see Note 2 and Guide.
Satm was assumed that nonlinearity of the ground was described by changing in time values of the dynamic stiffness modulus. Historical Version s – view previous versions of standard. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
The original calculation program, based on finite difference method which enables the description of wave propagation in cylindrical soil solid under impact load, was used.
Deflection can be measured above the center of the load plate, which in turn must be in contact with the unbound material under the plate. The volume of the pavement foundation materials affected by the applied load is a function of the magnitude of the load, plate size and rigidity, loading rate, buffer stiffness, and the stiffness and shear strength of the pavement foundation materials. Author links open overlay panel Wojciech Gosk.
All light weight deflectometers must be ASTM E certified and must come with a certificate to prove it.
Light Falling Weight Deflectometer
Accordingly, the test surface shall be as clean and smooth as possible with loose granules and protruding material removed. Under a Creative Commons license. Register for a trial account. The deflection is measured at the center of the top of the load plate see Note 1.