Understanding the effect of triethanolamine on grinding and hydration of blast furnace slag, focusing on the degrees of slag consumption and C(-A)-S-H formation
Year: 2024
Type: article
Abstract: This study investigated the effect of the use of triethanolamine (TEA) on grinding blast furnace slag (BFS) for enhancing hydration performance of slag cement . Raw BFS was pulverized with different dosages (0.02, 0.1, and 0.5 wt%) of TEA then various experiments including the quantification of degrees of slag consumption and C(-A)-S-H formation were conducted. As a result, with increasing TEA content, the aluminate reaction was accelerated while the silicate reaction was retarded. At 0.02 wt% TEA, the change in the fineness and hydration products was barely observed. Meanwhile, at 0.1 wt% TEA, a remarkable enhancement in compressive strength was measured (around 40 % increase). The improvement was explained by (1) a refinement of the slag fineness, (2) an increase in the slag reaction, and (3) porosity reduction. However, although 0.5 wt% TEA still promotes the formation of AFm phases, the hydration of the slag was not enhanced as much as that of TEA 0.1 wt% because of significantly delayed silicate reaction.
Authors: Jihoon Lee, Ahyeon Lim, Hyunuk Kang, Dongho Jeon, Namkon Lee, Chi sun Poon, Juhyuk Moon
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,080
OpenAlex ID: W4405741481