Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
The surface should be pre-wetted by fogging ahead of the spreader box when required by surface
and ambient conditions. The rate of application of the fog spray shall be adjusted during the day
to suit temperatures, surface texture, humidity, and dryness of the pavement surface.
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
materials to be used may be acceptable provided they were made during the same calendar year.
The documentation shall include the individual calibration of each material at various settings,
which can be related to the machine metering devices.
E. WEATHER LIMITATIONS
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
Proportioning Devices
Individual volume or weight controls for proportioning each material to be added to the mix, i.e.,
aggregate, emulsified asphalt, mineral and field control additives, and water shall be provided
and properly marked. These proportioning devices are usually revolution counters or similar
devices, and are used in material calibration and determining the materials output at any time.
Emulsion Pump
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
Fibers 0.05% to 0.25% by dry weight of aggregate as required to meet the
performance requirements of the TxDOT Overlay Test (Tex-248-
F) as described above
Aggregate - Recommended Gradations:
Type II Production
Screen Size % Passing Tolerance
3/8” 100 + 7.0/+7.0
#4 90-100 + 7.0
#8 65-90 + 4.0
#16 45-70 + 4.0
#30 30-50 + 4.0
#50 18-30 + 4.0
#100 10-21 + 4.0
#200 5-15 + 2.0
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
Fiber-Reinforced Mix Design
Fiber-reinforced mix designs shall be tested for flexibility utilizing the TxDOT Overlay Test
(Tex-248-F) traditionally used for hot mix asphalts (HMA), and adapted for micro-surfacing as
follows:
1.) Section 2.1 -- constant maximum displacement should be increased from 0.025 in. to
0.050 in., 10 seconds (one cycle) to 60 seconds (one cycle).
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
Hardness: The aggregate wear, from resistance to abrasion, shall be a maximum of 35% when
using AASHTO T96 or ASTM C131 test methods.
Water
The water shall be potable and shall be free of harmful soluble salts.
Modifier
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
ITEM 404.11 - MICRO-SURFACING
A. SCOPE
Work shall include all labor, materials, equipment, and transportation required for surface
preparation and placement of a thin overlay (micro-surface) as shown on the plans and as
directed by the Engineer.
B. MATERIALS
Emulsified Asphalt
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
ITEM 403.12 -HOT BITUMINOUS PAVEMENT, HAND METHOD
A. SCOPE
This work shall include paving using the hand method for areas where it is impractical to pave
using machine method, where shown on the plans, or as ordered by the Engineer.
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
ITEM 403.11 - HOT BITUMINOUS PAVEMENT, MACHINE METHOD
A. SCOPE
This work shall consist of furnishing and placing bituminous pavement including shim pavement
to the depth shown on the plans or ordered by the Engineer.
B. MATERIALS AND CONSTRUCTION
Technical Specifications IFB0660-040617
2017 Pavement Preservation
Revised per Addendum #1
ITEM 304.112 - RECLAIMED STABILIZED BASE PROCESSED IN PLACE, 12” DEEP
A. SCOPE
