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I <br />L <br />I <br />I <br />u. <br />I <br />I <br />I <br />ili <br />III <br />ui <br />N I <br />stockpile. Request the Engineer to make a visual inspection of the stockpiled RAP material. <br />Based on visual inspection and a review of the test data, the Engineer will determine the <br />suitability of the stockpiled materials. Once the RAP stockpile has been approved, do not <br />add additional material without prior approval of the Engineer. <br />Determine the binder content and gradation of the RAP <br />material in accordance with FM 5 -563 and FM 1 -T 030, respectively. Extract and recover <br />the asphalt binder from the RAP in accordance with FM 5 -524 and FM 3 -D 5404, <br />respectively. Determine the viscosity of the recovered asphalt binder in accordance with <br />ASTM D2171. Establish the Gsb of the RAP material by using one of the following <br />methods: <br />a) Calculate the Gsb value based upon the effective <br />specific gravity (Gse) of the RAP material, determined on the basis of the asphalt binder <br />content and maximum specific gravity (Gmm) of the RAP material. The Engineer will approve <br />the estimated asphalt binder absorption value used in the calculation. <br />b) Measure the Gsb of the RAP aggregate, in accordance <br />with FM 1 -T 084 and FM 1 -T 085. Obtain the aggregate by using either a solvent or <br />ignition oven extraction method. <br />334 -2.3.3 Pavement Composition: When the Contract includes milling of the <br />existing asphalt pavement, the Pavement Composition Data Sheet may be available on the <br />Department's website. The URL for obtaining this information, if available, is: <br />http: / /www. dot. state .fl.us /statematerialsoffice/ laboratory / asphalt /centrallaboratory /compos <br />itions/ index.htm <br />334 -2.3.4 Asphalt Binder for Mixes with RAP: Select the appropriate asphalt <br />binder grade based on Table 334 -2. The Engineer reserves the right to change the asphalt <br />binder type and grade at design based on the characteristics of the RAP asphalt binder, <br />and reserves the right to make changes during production. Maintain the viscosity of the <br />recycled mixture within the range of 4,000 to 12,000 poises [400 to 1,200 PaAs]. Obtain <br />a sample of the mixture for the Engineer within the first 1,000 tons [ 1 ,000 metric tons] of <br />production and at a continuing frequency of one sample per 4,000 tons [4,000 metric <br />tons] of mix. <br />Table 334 -2 <br />Asphalt Binder Grade for Mixes Containing RAP <br />Percent RAP <br />Asphalt Binder Grade <br />< 20 <br />PG 67 -22 <br />20— 29 <br />PG 64 -22 <br />>_ 30 <br />Recycling Agent <br />334 -2.4 Recycled Crushed Glass: Recycled crushed glass may be used as a <br />component of the asphalt mixture subject to the following requirements: <br />1. Consider the recycled crushed glass a local material and meet all <br />requirements specified in 902 -6. <br />2. Limit the amount of recycled crushed glass to a maximum of 15 percent <br />by weight of total aggregate. <br />3. Use an asphalt binder that contains a minimum of 0.5 percent anti - <br />stripping agent by weight of binder. The antistrip additive shall be one of the products <br />included on the Qualified Products List specified in 6 -1 of the Specifications. The antistrip <br />additive shall be introduced into the asphalt binder by the supplier during loading. <br />March 2007 01000 -55 03- 4122.D 4 U—j <br />