Txdot Grade 2 Base

2-2 TxDOT | 1-2022 TxDOT –Materials and Test Division Phase I – Base Binder Grade To specify a PG binder grade, one needs to determine the temperature extremes under which the pavement must perform. A grade is determined by indicating the …

TxDOT Specifications. 1993 Standard Specifications Book. Last Updated (04/29/2002) Click here to return to Index Page. DIVISION II - SUBBASE AND BASE COURSES. ... (Flexible Base Type and Grade Specified) (Depth Specified)" SY (Class 5) REFERENCE ITEMS (247, 300, 340, 421, 520, 524) Go to Top.

Flexible Base 1. DESCRIPTION Construct a foundation course composed of flexible base. 2. MATERIALS Furnish uncontaminated materials of uniform quality that meet the requirements …

2. Base and Subgrade Preparation. ... Use of hot PG, polymer-modified, or asphalt rubber binders with larger grade rock (Grade 2 or 3) can improve the performance of seal coats under higher truck traffic conditions. ... the type of tack coat according to standard TxDOT specifications on Item 330, "Limestone Rock Asphalt Pavement," and hot ...

We produce TxDOT Grade 1 Flexible Base which is commonly used for TEMPORARY ROADS, BASE MATERIAL FOR UNDERNEATH CONCRETE AND ASPHALT PAVING, DRIVEWAYS AND SIDEWALKS. Our Flex Base material is frequently used to weather proof a project, such as a cap on building pads or for building staging areas, which reduces lost time from rain delays.

1) When new base is required, specify type and grade on the plans. 2) Show typical sections, lines and grades of the work on the plans. 3) Specify the width and depth of work on the typical sections. 4) Specify the type of work on the plans. 5) Specify proof-rolling, when required, on the plans.

Grade 3 may be substituted for Grade 1–2 or Grade 5 when the flexible base is mixed with or without existing material and treated with cement, emulsion, ed asphalt, or lime, as …

Item 247, "Flexible Base," for the type and grade shown on the plans, before the addition of lime. 2.4. Water. Furnish water free of industrial wastes and other objectionable material. ... 4.5.2.2. Base. Compact the bottom course to at least 95% of the maximum density determined in accordance with Tex-121-E, unless otherwise shown on the ...

Anchor: #i1021617 Section 2: Base and Subgrade Preparation Anchor: #i1024130 2.1 Introduction. Pavement performance can be largely attributed to the care given in designing and preparing its foundation, which is comprised of …

Figure 3-2. Performance Grade Binder. ... 5.2 Selecting a PG Binder. A "base" PG binder can be established for any region within the United States with sufficient climate data. ... TxDOT spreadsheet uses the older version of the LTPP temperature model that was in place when TxDOT implemented PG. The current LTTPbind model is a little ...

Crushed material is preferred. The shape of the particles is very important to the strength and stability of the base. Aggregate …

Anchor: #i1013771 Section 4: Treated Subgrade and Base Courses Anchor: #i1048902 4.1 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 …

Asphalt Stabilized Base (Materials Only) 1. DESCRIPTION . Provide 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 #40 15–30 15–40 15–40 ...

TxDOT Specifications. 1995 Standard Specifications Book. Last Update (05/03/2002) ... When grade 2 aggregate is used, it will be in accordance with Item 340. 2) When "Aggregate for Surface Treatments" is required, it will be in accordance with Item 302. ... Type and grade of flexible base must be shown on the plans. 4) Type, grade and rate of ...

Ensure the aggregate gradation meets the requirements in Table 2 for the specified grade, unless otherwise approved. Furnish aggregate that meets the requirements shown in Table 3, unless …

Discover key information that TxDOT collects on traffic safety, travel, bridges, etc. Study our various maps, dashboards, portals, and statistics. Data and maps ; Reference maps; Traffic count maps; Official travel maps; Roadway inventory; One-stop demographic data analysis tool; Global Positioning System (GPS) Crash reports and records

Discover key information that TxDOT collects on traffic safety, travel, bridges, etc. Study our various maps, dashboards, portals, and statistics. ... Flexible Base Selection and Information Guide; Treatment Guidelines for Soils and Base in Pavement Structures; Prefabricated Structural Materials/Products. Nonconformance Report (NCR) Guidelines ...

Grade 1-2 base is recommended for conditions that do not provide stability from the pavement structure. When there is no lateral support or confinement, the base may become unstable as …

2.2 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) When new base is required, specify type and grade on the plans. 2) Specify type and application rate of asphalt or emulsion on the plans, when permitted for curing. 3) …

PG performance grade RC rapid-curing RS rapid-setting S-suffix stockpile usage SCM special-use cutback material SS slow-setting SY standard yield TRAIL tracking resistant asphalt interlayer 2.1. Asphalt Cement. Provide AC that is homogeneous, water-free, and non-ing when heated to 347°F, and in accordance with Table 2. Table 2

We produce TxDOT Grade 1 Flexible Base which is commonly used for TEMPORARY ROADS, BASE MATERIAL FOR UNDERNEATH CONCRETE AND ASPHALT PAVING, DRIVEWAYS AND SIDEWALKS. Our Flex Base material is frequently used to weather proof a project, such as a cap on building pads or for building staging areas, which reduces lost time from rain delays.

We are your trusted supplier of road base (flex base) Type A, Type D, Grade 1 or 2 and TXDOT Item 247. We serve Dallas, Fort Worth and much of North Texas. Materials. Crushed Concrete; Decomposed Granite; Limestone; ... Grade 1 or 2; TXDOT Item 247; Flex Base Material Calculator. Get a quick materials estimate for your project's needs. CALL ...

index, and wet ball mill for the grade specified. Do not use additives, such as but not limited to lime, cement, or fly ash to modify aggregates to meet the requirements of Table 1 unless shown on the plans. Table 1 . Material Requirements . Property Test Method Grade 1–2 Grade 3 Grade 4. 2 . Grade 5 . Sampling Tex-400-A

For example, according to the specification, a Grade 3 aggregate has a maximum particle size of 5/8 inch, and a Grade 4 has a maximum particle size of ½ inch. ... TxDOT specifications (Item 302, Aggregates for Surface Treatments) refer to the Flakiness Index, as measured in Test Method Tex-224-F, to control the aggregate shape. The lower the ...

2-2 TxDOT | 1-2022 TxDOT –Materials and Test Division Phase I – Base Binder Grade To specify a PG binder grade, one needs to determine the temperature extremes under which the …

Furnish aggregate of the type and grade shown on the plans and conforming to the requirements of Table 1. Each source must meet Table 1 requirements for liquid limit, plasticity index, and …

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 foundation course composed of flexible base. 247.2. Materials. Furnish uncontaminated materials of uniform quality that meet the requirements of the ... Property Test Method Grade 1 Grade 2 Grade 3 Grade 4 Master gradation sieve size (% retained) 2-1/2 in. – 0 0 1-3/4 in. 0 0–10 0–10 7/8 in. 10–35 – – 3/8 in. 30–50