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04751aam a2200493Ic 4500 001 F92B9E9EB7CA11EC864CB83724ECA4DB 003 SILO 005 20220409010100 007 cu c|||||||||| 008 160225s2015 iauado fsbt s000 0 eng d 035 $a (OCoLC)940965829 040 $a UIG $b eng $e rda $c UIG $d SILO 100 1 $a Li, Shengting, $e author. $u Iowa State University. 245 10 $a Cement Stabilization of Embankment Materials $c Shengting Li, David White, and Pavana Vennapusa 264 1 $a Ames, Iowa $b Institute for Transportation, Iowa State University $c 2015 300 $a xii, 52 pages (66 pages in PD file) $b illustrations, charts, photographs (chiefly color) 500 $a July 2015 -- Technical Report Documentation Page 504 $a Includes bibliographic references (pages 43-44) 513 $a Final Report 520 3 $a Embankment subgrade soils in Iowa are generally rated as fair to poor as construction materials. These soils can exhibit low bearing strength, high volumetric instability, and freeze/thaw or wet/dry durability problems. Cement stabilization offers opportunities to improve these soils conditions. The objective of this study was to develop relationships between soil index properties, unconfined compressive strength and cement content. To achieve this objective, a laboratory study was conducted on 28 granular and non-granular materials obtained from 9 active construction sites in Iowa. The materials consisted of glacial till, loess, and alluvium sand. Type I/II Portland cement was used for stabilization. Stabilized and unstabilized specimens were prepared using Iowa State University 2 in. by 2 in. compaction apparatus. Specimens were prepared, cured, and tested for unconfined compressive strength (UCS) with and without vacuum saturation. Percent fines content (F200), AASHTO group index (GI), and Atterberg limits were tested before and after stabilization. The results were analyzed using multi-variate statistical analysis to assess influence of the various soil index properties on post-stabilization material properties. Results indicated that F200, liquid limit, plasticity index, and GI of the materials generally decreased with increasing cement content. The UCS of the stabilized specimens increased with increasing cement content, as expected. The average saturated UCS of the unstabilized materials varied between 0 and 57 psi. The average saturated UCS of stabilized materials varied between 44 and 287 psi at 4% cement content, 108 and 528 psi at t 8% cement content, and 162 and 709 psi at 12% cement content. The UCS of the vacuum saturated specimens was on average 1.5 times lower than that of the unsaturated specimens. Multi-variate statistical regression models are provided in this report to predict F200, plasticity index, GI, and UCS after treatment, as a function of cement content and soil index properties. 516 $a Text file in PDF format. 536 $a Performed by Iowa State University, Institute for Transportation, Center for Earthwork Engineering Research 536 $a Sponsored by the Iowa Department of Transportation 538 $a System requirements: Adobe Acrobat, Adobe Acrobat Reader, or other PDF reading software. 538 $a Mode of access: World Wide Web $u http://publications.iowa.gov/id/eprint/21556 650 0 $a Soil stabilization $z Iowa. 650 07 $a Cohesive soils $2 trt 650 07 $a Embankments $2 trt 650 07 $a Mix design $2 trt 650 07 $a Soil stabilization $2 trt 653 $a Cement stabilization 653 $a Embankment soils 700 1 $a White, David J., $e author. $u Iowa State University. 700 1 $a Vennapusa, Pavana, $e author. $u Iowa State University. 710 2 $a Iowa State University. $b Center for Earthworks Engineering Research, $e performing body. 710 1 $a Iowa. $b Department of Transportation, $e sponsoring body. 856 41 $a Iowa Publications Online $3 Full text access from Iowa Publications Online $z Full report $u http://publications.iowa.gov/id/eprint/21556 856 41 $a Digital Repository @ Iowa State University $3 Full text access from Digital Repository @ Iowa State University $z Full report $u http://lib.dr.iastate.edu/intrans_reports/177 856 40 $a Institute for Transportation $3 Full text access from InTrans $z Full report $u http://www.intrans.iastate.edu/research/documents/research-reports/cement_stabilization_embankment_w_cvr.pdf 856 42 $a Institute for Transportation $3 Full text access from InTrans $z Project description and access page $u http://intrans.iastate.edu/research/projects/detail/?projectID=1192909558 941 $a 1 952 $l IAOX771 $d 20240710103157.0 956 $a http://locator.silo.lib.ia.us/search.cgi?index_0=id&term_0=F92B9E9EB7CA11EC864CB83724ECA4DB 994 $a C0 $b UIGInitiate Another SILO Locator Search