Mr. Jamey West May 27, 2016 City of Winder c/o ESG Operations 431 Miles Patrick Road Winder, Georgia 30680

Transcription

1 Mr. Jamey West May 27, 2016 City of Winder c/o ESG Operations 431 Miles Patrick Road Winder, Georgia Dear Mr. West: Report of Full Depth Reclamation Mix Design Testing City of Winder Winder, Georgia Geo-Hydro Engineers has completed the laboratory full depth reclamation mix design testing for the above referenced project. For this project, we understand that the existing pavement materials will be mixed with Type I/II Portland cement. The desired field compressive strength of the reclaimed mixture is 300 psi. The following paragraphs summarize our procedures and results from laboratory testing. We obtained bulk samples of the roadway materials from the following streets: Corinth Church Road Bulk samples that were obtained from different streets with similar characteristics, were thoroughly blended into one composite sample. On each composite sample, we performed laboratory procedures for preparing compressive strength specimens in general accordance with the following standards: ASTM D698 Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort ; ASTM D558 Standard Test Method for Moisture Density Relations of Soil Cement Mixtures, Method B; and ASTM D1633 Standard Test Method for Strength of Molded Soil-Cement Cylinders, Method A. We chose amendment percentages of approximately 4 and 6 percent of the dry weight of the parent material based on our experiences with similar projects. The results from of our laboratory testing are summarized in the tables on the following pages Cobb Place Boulevard, Suite 290 Kennesaw, Georgia o: f:

2 depth of 10 inches which is approximately 3.8 and 5.9 percent of dry weight of the parent material, Maximum Optimum Bulk with No Treatment Maximum Optimum Bulk with 35 lbs/yd 2 (3.8%) Bulk with 55 lbs/yd 2 (5.9%) ASTM D 1633 Standard Test Method for Strength of Molded Soil-Cement Cylinders Bulk amended with 35 lbs/yd 2 (3.8%) Type I Portland Cement for a depth of 10 inches A B C Bulk amended with 55 lbs/yd 2 (5.9%) Type I Portland Cement for a depth of 10 inches A B C May 27,

3 depth of 10 inches which is approximately 3.9 and 6.2 percent of dry weight of the parent material, Maximum Optimum Bulk with No Treatment Maximum Optimum Bulk with 35 lbs/yd 2 (3.9%) Bulk with 55 lbs/yd 2 (6.2%) ASTM D 1633 Standard Test Method for Strength of Molded Soil-Cement Cylinders Bulk amended with 35 lbs/yd 2 (3.9%) Type I Portland Cement for a depth of 10 inches A B C Bulk amended with 55 lbs/yd 2 (6.2%) Type I Portland Cement for a depth of 10 inches A B C May 27,

4 Corinth Church Road depth of 10 inches which is approximately 3.7 and 5.9 percent of dry weight of the parent material, Maximum Optimum Bulk with No Treatment Maximum Optimum Bulk with 35 lbs/yd 2 (3.7%) Bulk with 55 lbs/yd 2 (5.9%) ASTM D 1633 Standard Test Method for Strength of Molded Soil-Cement Cylinders Bulk amended with 35 lbs/yd 2 (3.7%) Type I Portland Cement for a depth of 10 inches A B C Bulk amended with 55 lbs/yd 2 (5.9%) Type I Portland Cement for a depth of 10 inches A B C May 27,

5 Based on the average compressive strength results, utilizing Type I Portland cement at the following amendment rates will yield adequate compressive strength results at 7-days: Road(s) Amendment Rate Mix Depth 40 lbs/yd 2 10 inches 40 lbs/yd 2 10 inches Corinth Church Road 40 lbs/yd 2 10 inches If isolated areas of soft subgrade soils still exist, remixing of these areas at a higher amendment rate may be necessary. If the base materials vary significantly from the materials used in the FDR mix design, the amendment percentages may need to be altered during construction in order to obtain desirable compressive strength results. In general, we recommend that FDR construction be performed in general accordance with the construction requirements defined by Georgia DOT Section Cement Stabilized Reclaimed Base Construction specifications. * * * * * * We appreciate the opportunity to provide you with this service. Should you have any questions, please contact our office. GEO-HYDRO ENGINEERS, INC. Thomas M. Baglivo, P.E. Project Manager tbaglivo@geohydro.com Michael C. Woody, P.E. Kennesaw CMT Manager mwoody@geohydro.com TMB\I:\CMT\Projects\2016\ City of Winder Pavement Evaluation\ City of Winder FDR Mix Design Report doc May 27,