919-1 Description.
This Section specifies the requirements for ground tire rubber (GTR).
919-2 General Requirements.
919-2.1 General: The GTR shall be produced from tires and shall be substantially free
from contaminants including fabric, metal, mineral, and other non -rubber substances. Up to 4% (by weight of rubber) of talc or other inert dusting agent, may be added to prevent sticking and caking of the particles.
919-2.2 Ground Tire Rubber (GTR) for Use in Asphalt Rubber Binder: GTR shall
be sufficiently dry so as to be free flowing and to prevent foaming when mixed with asphalt cement. The use of pelletized asphalt rubber is permit ted provided the components of the pelletized rubber particles meet the requirements of this Section. Additionally, the pelletized particles must disassociate once blended with asphalt cement.
919-2.3 Ground Tire Rubber (GTR) for Use in Flowable Fill: GTR may replace up to
20% of the fine aggregate.
919-2.4 Approved Product List (APL) : GTR and pelletized rubber used shall be one of
the products listed on the Department’s Approved Product List (APL). Manufacturers seeking evaluation of their product shall submit an application in accordance with Section 6.
919-3 Physical Requirements .
The physical properties of the ground tire rubber shall be determined in accordance with FM 5-559, and shall meet the following requirements: Specific Gravity ................................ ................. 1.02 to 1.20 Moisture Content ................................ .......Maximum 0.75% Metal Contaminants ................................ ...Maximum 0.01% Gradation .............. Minimum 98% Passing the No. 30 Sieve
919-4 Chemical Requirements.
The chemical composition of the ground tire rubber shall be determined in accordance with ASTM D297-13 and shall meet the following requirements: Acetone Extract ................................ .............Maximum 25% Rubber Hydrocarbon Content ............................... 40 to 60% Ash Content ................................ .................... Maximum 8% Carbon Black Content ................................ ........... 20 to 40% Natural Rubber ................................ ...................... 16 to 45%
919-5 Packaging and Identification Requirements.
The ground tire rubber shall be s upplied in moisture resistant packaging such as either disposable bags or other appropriate bulk containers. Each container or bag of ground tire rubber shall be labeled with the manufacturer’s designation for the rubber and the specific type, maximum nomi nal size, weight and manufacturer’s batch or LOT designation. FY 2023-24 Return to Table of Contents
919-6 Certification Requirements.
The Contractor shall submit to the Engineer a certification conforming to the requirements of Section 6 from the manufacturer, confirming that the ground tire rubber meets the requirements of this Section. FY 2023-24 Return to Table of Contents MATERIALS FOR PORTLAND CEMENT CONCRETE (STRUCTURAL, PAVEMENT, AND MISCELLANEOUS) SECTION 921 PORTLAND CEMENT AND BLENDED CEMENT
921-1 General.
Cement shall conform to the requirements of AASHTO M 85 or AASHTO M 240, as applicable, except as provided in this Section.
921-1.1 Type of Cement: Cement may be Types I, II, III, V (as defined by
AASHTO M 85), or IL, IP, IS, IT (as defined by AASHTO M 240). Cement type shall be selected based on component and environmental conditions in accordance wi th Section 346. Different brands of cement, cement of the same brand from different facilities, or different types of cement shall be stored separately , identified, and shall not be mixed.
921-1.2 Heat of Hydration: The cement heat of hydration for Type II, Type IT, Type IL,
Type IP, and Type IS shall be tested in accordance with ASTM C1702 and reported at three days.
921-2 Definitions.
The following definitions are applicable to the production and Quality Control (QC) of cement:
1.Approved Laboratory: A laboratory that is currently inspected by the Cement and Concrete Reference Laboratory (CCRL), is actively participating in the CCRL proficiency program, and which has all deficiencies noted at the time of inspection corrected. The laboratory must also authorize CCRL to submit their inspection reports to the State Materials Office (SMO).
2.Producer: A cement supplier, including but not limited to a plant, a terminal, or a transfer facility, that has been qualified by the SMO. The Cementitious Material s Production Facility Listing will be maintained by the SMO.
3.Test Report: A certification from the Producer showing that the cement meets the requirements of Section 921. The test report must include, at a minimum, the following information:
a.The type of cement.
b.The production period.
c.Chemical and physical analysis of the cement.
d.The silo identification where the cement is stored.
e.The base cement phase composition, except for blended cements.
f.Amount of limestone and/ or inorganic processing additions used, expressed as a percentage of the cement mass.
g.The oxide composition of the limestone and/or inorganic processing additions.
h.The specific gravity of cement reported as an average of the last twelve monthly tests, updated every six months.
i.The heat of hydration at three days.
j.The approved laboratory that performed all tests. FY 2023-24 Return to Table of Contents
Source: Florida Standard Specifications for Road and Bridge Construction, 2024 Edition. Pages 1005–1006 of 1,299.