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7305225 
Journal Article 
Strength and Leaching Characteristics of Heavy Metal Contaminated Soils Solidified by Cement 
Yang, YuYou; Wu, HaoL; Du, YanJun 
2014 
Yes 
Journal of Residuals Science and Technology
ISSN: 1544-8053 
11 
3 
91-98 
WOS:000344194900004 
Portland cement was used to stabilize Zn and Pb contaminated soils sampled from a mining area. A series of tests including unconfined compression test, pH test, toxicity characteristic leaching procedure (TCLP), and synthetic precipitation leaching procedure (SPLP) were conducted in order to investigate the effects of curing time and cement content on the unconfined compressive strength and leachability of lead and zinc. The test results show that at the curing time of 28 d, the dry density and UCS of soil with 8% cement are approximately 2% higher than and 1.6 times, respectively, those of the soil with 4% cement. The pH values of TCLP and SPLP leachate drop by 1.19 to 1.23 and 0.34 to 0.38, respectively when the curing time increases from 0 to 28 d. Moreover, the test results also show that the concentrations of leached Pb and Zn decrease with increasing curing time.