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ASTM E2835-11(2015)
Standard Test Method for Measuring Deflections using a Portable Impulse Plate Load Test Device
Automaticky přeložený název:
Standardní testovací metoda měření výchylek pomocí přenosného Impulse Plate Load testovacího zařízení
NORMA vydána dne 1.9.2015
Informace o normě:
Označení normy: ASTM E2835-11(2015)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.9.2015
Kód zboží: NS-623218
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM E2835-11(2015) :
Keywords:
deflection surveys, deflection test methods, deflection testing, Dynamic Plate Load Testing (DPLT), Light Drop Weight Tester (LDWT),, impulse deflection testing device, Light Weight Deflectometer (LWD), load-deflection testing, Nondestructive Testing (NDT), pavement deflection, pavement foundation layers, pavement layer modulus, pavement layer stiffness, Portable Falling Weight Deflectometer (PFWD), Portable Impulse Plate Load Test, quality assurance,
Doplňující informace
| Significance and Use | ||||
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4.1 This test method covers the determination of plate deflection resulting from the application of an impulse load. The deflection is measured at the center of the top of the load plate (see Note 1). Note 1: If the load plate is in “perfectly uniform” contact
with the unbound material under the plate, then deflection of the
load plate should be equal to the deflection of the surface of the
unbound material under test. However, with typical unbound
materials a 100% uniform contact can seldom be achieved.
Accordingly, the test surface shall be as clean and smooth as
possible with loose granules and protruding material removed. For
gravel surfaces it is recommended that a thin layer of fine sand be
placed over the test point. For fine-grained materials, this will
help in obtaining a reasonably uniform contact between the load
plate and the surface. See 5.1 in Test Method .
4.2 Deflections may be either correlated directly to pavement performance or used to determine in-situ material characteristics of the pavement foundation layers. 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 ). Note 2: 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. 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.
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| 1. Scope | ||||
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1.1 This test method applies to measuring plate deflections using a Portable Impulse Plate Load Test device. 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). 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. |
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| 2. Referenced Documents | ||||
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