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
Special quick-setting emulsifier agents shall be milled into the asphalt emulsion. The emulsified
asphalt shall be so formulated that when the paving mixture is applied at a thickness of one inch
with the relative humidity at not more than 50% and an ambient air temperature of at least 75
degrees F, the material will cure sufficiently so that rolling traffic can be allowed in one hour
with no damage to the surface, as verified by the Engineer.
Additives
A mineral additive shall be introduced to the aggregate and may be any recognized brand of non-
air entrained Portland cement or hydrated lime that is free of lumps, or other approved mineral
additive. It may be accepted upon visual inspection. The amount of mineral additive needed
shall be determined by the laboratory mix design and will be considered as part of the material
gradation requirement.
A liquid field control additive may be introduced and blended with water to provide effective
control of the required quick-set properties. This additive shall be made available by the
chemical supplier or emulsion manufacturer, and certified to be compatible with the mixture.
C. ENGINEERING
General
Before work commences, the contractor shall submit a signed and certified mix design covering
the specific material(s) to be used on the project. This design shall be performed by a qualified,
independent laboratory. Once the materials are approved, no substitution will be permitted
unless first tested and approved by the laboratory preparing the mix design.
Mix Design
The independent laboratory shall develop the job mix design and present certified test results for
the contractor’s and Engineer’s approval. Compatibility of the aggregate and emulsion shall be
verified by the mix design. The job mix formula shall meet standard ISSA A143 micro-
surfacing mix design requirements. All component material used in the mix design shall be
representative of the material proposed by the contractor for use on the project.
