Lakeside V2-CS 950901 AT Laboratories, Inc.
Con. suiting EngCneers
Construction Materials Inspection/Testing Se~
Environmental Assessments * Quality Cfrol
For this site, two types of pavement have been identified based on the anticipated traffic
patterns. These two types of pavements are identified as Standard Duty and Heavy Duty
in this report. We also present options for both flexiblex(asphaltic concrete) and rigid
(c~ncrete) pavement sections for both types of traffic. W~ecommend using the heav~¥~
duty pavement section for all truck traffic areas, interior roa~s, and entrance ~rh'Ces.
The Standard Duty pavement section should only be used for passeffger car parking
areas.
Standard Duty Pavement: The sections developed for the standard duty pavement
consist of the following:
Flexible Sections
2-in HMAC Surface Course (TXDOT Item 340 Type D),
8-in Aggregate Base (TXDOT Item 247, Type A Grade 1),
8-in scarified/recompacted subgrade
OR
Riqid Section
5-in Reinforced Concrete (TXDOT Item 360),
8-in scarified/recompacted subgrade
The pavement sections should be constructed in accordance with applicable sections of
the Texas Highway Department (TXDOT) Standard Specifications. 1993 Edition.
Heavy Duty Pavement: The pavement sections developed for the heavy duty areas
consist of the following:
Flexible Sections
I 3-in HMAC Surface Course (TXDOT Item 340 Type D),
8-in Aggregate Base (TXDOT Item 247, Type A Grade 1).
8-in scarified/recompacted subgrade
I
I 10
214-985-9401 * 214-660-5562
I Arlington * Dallas · Ft. Worlh · Garland * Grand Prairie
AT La boratories, Inc.
Consulting Engineers · Geotechnlcal
Construction )Via terials Inspection/Testing Services
Environmental Assessments · Quality Control
P.O. Box 5552 · Arlington, TX 76005
OR
Riqid Section
6-in Reinforced Concrete, (TXDOT Item 360)
8-in scarified/recompacted subgrade
The pavement sections should be constructed in accordance with applicable sections of
the Texas Highway Department (TXDOT) Standard Specifications, !993 Edition.
Pavement Subc~rade: Subgrade preparation should consist of removing all vegetation,
tree roots, organic top soil. and any undesirable materials from the construction area.
subgrade areas then proofrolled a dump heavy scraper,
The
should
be
with
loaded
truck,
or similar pneumatic-tired equipment. The proofrolling serves to compact surficial soils
and to detect any soft or loose zones. Any soils deflecting excessively under moving
loads should be undercut to firm soils and replaced with engineered fill. The engineered
fill should be compacted to at least 95 percent of the Standard Proctor. ASTM D698.
maximum dr'/ density.
To provide uniform support below the pavement, we recommend the top 8-in of exposed
subgrade be scarified and compacted to no less than 95 percent of the Standard Proctor
maximum dry density. The soils should be moisture conditioned to -1 to +3 percent of the
Standard Proctor optimum moisture content during compaction. Special provisions for
preparm§ and backfilling using engineered fill are included in other sections of this report.
Aqc]reaate Base: Aggregate base material should comply with the Texas Highway
Department (TXDOT) Standard Specifications. 1993 Edition. Item 247, Grade A Type 1.
Aggregate base satisfying the requirements should be placed on the prepared subgrade,
moistened to within 2 percent of op[imum moisture and compacted to not less than 95
percent of the maximum density as determined by ASTM D1557 (Modified Proctor).
AsphaiticConcrete' The composition of the paving mixture should consist ofb~tuminous
material, aggregate and filler, if required, conforming to the requirements of the Texas
Highway Department (TXDOT) Standard Specifications. 1993 Edition Item 340 Type D
for the surface course. The material properties and compaction of the asphaltic concrete
should be in accordance with applicable sections of the TXDOT specifications.
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214-988-9401 · 214-660-5562
Arlington · Dallas · Ft. Worth · Garland · Grand Prairie