If no grade adjustments are permitted correct thickness deficiencies by removing and replacing the full depth of base course in the deficient areas with one of the following materials Cement Stabilized Crushed Aggregate Base Course Asphaltic Concrete I f grade adjustments are permitted the Contractor has the option of correcting
TxDOT Specifications 2004 Standard Specifications Book Last Updated 03/05/2004 and/or locations for removing existing asphaltic concrete pavement and/or asphalt stabilized base must be shown on plans 2 Show on the plans if reclaimed material is required to be other than 95% passing 2 in sieve 2 Type and grade of emulsified
a flex Base but not everyone sells a testable flex Base to TxDOT Item #247 specifications This is a big deal because without testing you could be purchasing stone that is too soft which means within a couple of years the doing to grade work to install the flex base you can rent something small like a walk behind vibraplate which will
Any milling of stabilized base should be approved by the engineer to ensure that no damage to the base or deficient base thickness result Paving Operations As with any paving method it is important that the concrete be discharged consolidated and finished to provide optimum ride quality and long term performance
subgrade base asphalt concrete ≥10 ; ≥325 lb per inch of wheel width 2 3 ; Tamping Embankment subgrade 125 550 psi per tamping foot 2 3 Heavy tamping Embankment subgrade ≥550 psi per tamping foot 2 3 Vibratory Type C as ; Embankment subgrade base asphalt concrete Type A < 6 Type B 6 > shown on the plans
TxDOT Precertification Process Personal Certification Type Codes Page 1 of 2 Rev March 2022 Code Certification 100000 Professional Engineer 116000 American Concrete Institute ACI Concrete Field Testing Technician Grade I 117000 American ConcreteInstitute ACI Laboratory Testing Technician Grade I 118000 American
2 5 11 12 13 17 18 20 21 TxDOT Standard Inlet & Manhole Program SIMP 3 4 • Precast base terminates below ground below grade slab no access to the PJB from the surface or it is connected to the POD inlet with an
Article Materials Section A Aggregate Table 1 Material Requirements is replaced by the following Table 1 Material Requirements Property Test Method Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 Master gradation sieve size cumulative % retained 2 1/2 in 0 0 0 1 3/4 in 0 0 10 0 10 0 5 7/8 in 10 35 10 35
SP247 040 PDF RTF Adds ride quality and lime treatment to flexible base and provides recycled materials that have a maximum sulfate content of 3000 ppm when tested in accordance with Tex 145 E SP 247 040 contains the requirements of 247 033 and 247 030 and may be used in lieu of 247 033 Replaces SP247 030 Statewide Use
Flexible Base Furnish new base material that meets the requirements of Item 247 Flexible Base for the type and grade shown on the plans Water Furnish water free of industrial wastes and other objectionable matter 3 EQUIPMENT Provide machinery tools and equipment necessary for proper execution of the work
Item 247 Flexible Base Unconfined compressive strength for Grade 1 2 may be waived Unless otherwise shown on the plans the unconfined compressive strength is waived when the flexible base material meets a #200 sieve requirement #200 sieve requirement added to material requirements When the #200 sieve requirement does not meet
TxDOT Specifications English and Metric Specification Books Special Provisions Special Specifications Change Memorandums Adds Grade 5 Flex base One Time Use SP247 034 PDF RTF For project 0369 03 027 0369 03 028 in Uvalde County Amend Articles and One Time Use
2 Base comparisons on sets consisting of at least 2 standard specimens made from a composite sample Fine Aggregate Gradation Chart Grade 1 Sieve Size Percent Passing 3/8" 100 #4 95 100 #8 80 100 #16 50 85 #30 25 65 #50 110 35 #100 0 10 #200 20 3
specified in TxDOT Specification Item 247 Flexible Base 3 TESTING The City will engage a laboratory and pay for one test each gradation liquid limit plasticity index Grade tolerance shall be generally 1/2 inch and highs and lows must approximately balance If called for in the drawings or elsewhere in the contract documents
Grade 5 base material allows the use of a harder aggregate with a lower fines content Fines may be less cohesive than those found in Grade 1 2 Since the Grade 5 base has the potential to have non cohesive fines but has strengths equivalent to a Grade 1 2 base when confined a 3 psi lateral confinement is used for
Construct a base or foundation course composed of a compacted mixture of aggregate and asphalt binder mixed hot in a mixing plant 2 MATERIALS Sieve Size Grade 1 Grade 2 Grade 3 Grade 4 1 3/4" 100 100 As shown on the plans 1 1/2" 100 90 100 1" 90 100 3/8" 45 70 #4 30 55 25 55
5 The material specifications are published in PDF format and may be accessed and printed upon acceptance of this agreement This is a free service
Types of Flexible Pavements These pavements may fall into one of the following categories Anchor #HJMBGPMM; surface treatment on a granular base Anchor #VQYKTVYH; thin hot mix asphalt < 2 in on a granular base Anchor #ARBYXWRO
1 TxDOT has established standards and specifications for the construction and maintenance of highways streets and bridges Find important document links and information for contractors and professional service providers below 2024 Standard Specification Book
2 Geotechnical Investigation for Pavement Structures ♦ Introduction; ♦ Preliminary Investigation; ♦ Subsurface Exploration; ♦ Treatment Guidelines; ♦ Geotechnical Summary Report for Pavement Design Development 3 Flexible Base Selection ♦ Introduction; ♦ Flexible Base Description; ♦ Base
at all grade crossing construction on finished compacted base and around drains and filter material as shown on the Drawings for roadway crossings to be constructed under this Contract The fabric shall be carefully placed without wrinkles pulled flat and lapped at least two feet 2 or sewn where two widths of fabric are joined
Section 4 Treated Subgrade and Base Courses Anchor #i1048902 General Frequently local base and subgrade materials do not meet the material and engineering properties required for good pavement foundation performance
bases subbase and possibly subgrade that will be recycled new f lexible base Item 247 Flexible Base and RAP from other sources can be used as shown on the plans required by the mixture design or directed by the engineer TxDOT specifications term this material Additional Material
Polymer Modified Asphalt Cement Provide polymer modified asphalt cement that is smooth homogeneous and meets the requirements of Table 3 Supply samples of the base asphalt cement and polymer additives if requested Table 3 Polymer Modified Asphalt Cement Property Test Procedure Polymer Modified Viscosity Grade AC 5 w/2% SBR AC 10
This document provides a basic overview of Item 247 "Flexible Base " from the Texas Department of Transportation TxDOT 2014 Standard Specifications for Construction and Maintenance of Highways Streets and Bridges