Journal
CANADIAN GEOTECHNICAL JOURNAL
Volume 55, Issue 4, Pages 486-494Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cgj-2016-0391
Keywords
gold tailings; durability; Portland cement; shear modulus; strength; porosity/cement index
Funding
- PRONEX FAPERGS/CNPq [12/2014]
- CNPq (INCT-REAGEO)
- CNPq (Produtividade em Pesquisa)
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Compaction and Portland cement addition are amongst promising ground improvement procedures for enhancing the mechanical properties of gold tailings. The present investigation intends to compute the impact of Portland cement content and dry density on the properties (durability, stiffness, and strength) of compacted gold tailings - cement mixes. Its main significant addition to knowledge is the quantification of accumulated loss of mass (ALM) after wetting-drying cycles, shear modulus at small strains, and unconfined compressive strength (q(u)) as a function of the porosity/cement index. In addition, the existence of an exclusive relation connecting ALM divided by the number of wetting-drying cycles and porosity/cement index is revealed empirically. This broadens the applicability of such an index by demonstrating that it controls not only mechanical but also endurance performance of compacted gold tailings - Portland cement mixes.
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