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1
Guidelines for Using Local Material for Roadway Base and
Subbase
On the other hand, for a strong base, increase in base thickness decreases the
total rutting of pavement structure. 5.3.3 Utilization of Subbase Layer One
possible way to utilize the lower quality local materials is to use them as a
subbase layer.
2
Integrating Instrumentation Data in Probabilistic ...
Load Configuration Actual Speed, kph Vertical Stress, kPa Run# Location
Season Axle Data Source 1 B Subbase Spring 1 42 Measured 12.9 1 B Subbase
Spring 1 42 Predicted 14.7 1 B Subbase Spring 2 42 Measured 8.6 1 B Subbase
...
3
Pavement Cracking: Mechanisms, Modeling, Detection, Testing ...
To capture the “dynamic” feature of joint opening due to temperature and
moisture changes in PCC slab and slab-subbase frictional restraint, a
mechanistic model is preferred. From a detailed literature review, an existing
elasticity-based ...
Imad L. Al-Qadi, Tom Scarpas, Andreas Loizos,
2008
4
Structural Design of Interlocking Concrete Pavement for ...
Untreated aggregate base and subbase should be compacted to at least 98% of
maximum dry density based on AASHTO T180 Method D (AASHTO 2009), or the
equivalent. 3.7.1 Unbound Dense Graded Base Aggregates should be crushed, ...
Transportation & Development Institute (American Society of Civil Engineers),
2010
5
Popular Mechanics Complete Home How-to
Unless the concrete is for pedestrian traffic only, lay a subbase of compacted
gravel below the paving. This will absorb ground movement without affecting the
concrete itself. A subbase is not essential for a very lightweight structure, such as
a ...
Albert Jackson, David Day,
2009
6
Drainage and Erosion Control: Subsurface Drainage Facilities ...
Purpose Subsurface drainage may be divided according to its purpose into base-
and subbase-course drainage, sub- grade drainage, and intercepting drainage.
Base and subbase drainage consists of removing water from a base and/or ...
7
Flexible Pavement Design for Airfields: Technical Manual
Stabilized base course and subbase course materials meeting the requirements
for strength and durability in chapter 8 may be substituted for unstabilized
materials. Procedures for pavement design with stabilized layers are as follows: (
a) ...
8
Significant Findings from Full-scale Accelerated Pavement ...
Deflections under load increase rapidly for a slab in a curled state until contact is
made between the base and subbase, whereupon there is little further increase. •
For slabs with and without dowels, erosion occurred in the subbase of ...
Frederick Hugo, National Research Council (U.S.). Transportation Research Board,
2004
9
AASHTO Guide for Design of Pavement Structures, 1993
where 0 = sum of the principal stresses, o, + 02 + 03; referring to AASHTO T 274,
this corresponds to od + 303 when od = o, - 03. The strength of the granular base
or subbase is related to the stress state which will occur under operating ...
10
Vertical Stiffness Characterization of a Geocomposite ...
(a) #57 Limestone Subbase, and (b) A-2-4 Soil Subbase. Figure 6.9: Exploded
View of Component Geometries used for Axisymmetric FE Modeling of Non-
Repetitive Plate Bearing Tests of A-2-4 Soil Subbase with Roadrain Figure 6.10:
...