New York/ New Jersey Harbor: Alternative Methods for Ex ... - CLU-IN

The GTI process removed an average of 100% of PeCDD, HxCDD, HpCDD, and TCDD
as shown in Appendix F. The treated sediment also contained levels of 2,3,7,8 TCDD
below the detection limit of 1 ppt, which is below the recommended standard of 1ppb.
End-Use Product
The end-use material produced by GTI is not portland cement, rather it is a cement
product with properties similar to those of portland cement, to which sand, gravel, and
water must be added in order to create concrete (25). The cement product resulting from
the sediment decontamination is coined Ecomelt by GTI. Compressive strength tests
were performed on the Cement-lock cement to determine whether it met ASTM standards
C-595 for blended cement and C-150 for Portland cement. Water and Ottawa sand were
blended with the cement in a standard ratio specified by ASTM. In accordance with the
ASTM standard testing method, the samples were allowed to cure for 3, 7, and 28 days.
A summary of the results are shown in Figure 7. The Cement-Lock Cement passed all of
the standards for both blended and Portland cement, with the exception of the blended
cement seven day test period requirement, which it missed by 0.1 Mpa.
Figure 7: Comparison of Cement-Lock Cement Strength v. ASTM
Cement Requirements
GTI Cement-Lock C-595
ASTM Cement
Requirements
C-150
Test Period (days) Cement Blended Portland
3 15.4 13 12
7 19.9 20 19
28 36.3 24 28
28