Effect of Lithium Slag on Drying Shrinkage of Concrete with Manufactured-sand

Abstract

ABSTRACT:In order to comprehensively grasp the effect of lithium slag on the properties of concrete and promote the application of lithium slag in concrete, the effect of lithium slag on drying shrinkage of concrete with manufactured-sand was studied by testing drying shrinkage of concrete with manufactured-sand at different ages. The corresponding effect mechanism was also analyzed by water retention of the corresponding mortar and the pore structure of concrete which was obtained by evaporable water test. The results indicate that 15% and 30% lithium slag decrease effectively the drying shrinkage of concrete with manufactured-sand, and with the increase of the content of lithium slag, the decrease effect is better. When the content of lithium slag is increased to be 45%, the drying shrinkage of the concrete is increased. The smaller pores correspond to the higher water retention to decrease the drying shrinkage of manufactured-sand concrete with the appropriate content of lithium slag.

A Review on Cementitious and Geopolymer Composites with Lithium Slag Incorporation

“…Due to the numerous variables involved, the slump values did not exhibit a certain trend with the LS contents. Furthermore, He et al [ 36 ] studied concrete with LS contents ranging from 40% to 60% and reported a reduction in workability as the LS content increased. To achieve satisfactory flowability, this study increased the dosage of the superplasticizer, thus keeping the slump value within the range of 180 to 200 mm [ 94 ].…”

“…For instance, compared to specimens without LS, the specimen with 30% LS exhibited a 23% reduction in dry shrinkage at 180 days. Furthermore, He et al [ 36 ] explored the impact of LS on the drying shrinkage of concrete with manufactured sand at different ages. The results indicated that 15% and 30% LS effectively reduced the drying shrinkage of manufactured sand concrete, with a more pronounced effect at a higher LS content.…”

“… A compilation of shrinkage ratios in cementitious composites with varying LS contents and different ages [ 36 , 41 , 49 , 50 , 56 ]. …”

Mechanical properties, drying shrinkage, and creep of concrete containing lithium slag

“…They react with calcium hydroxide originated from cement hydration to produce additional C-S-H. In addition, LS particles with high content of SO3 also generate the inflatable ettringite (AFt) in alkaline environment [15,16], which is different from other SCMs [5,[19][20][21][22]. This additional C-S-H and AFt can also fill large pores and/or voids.…”

A comprehensive review of properties of concrete containing lithium refinery residue as partial replacement of cement

“…It has been found that a substantial amount of work has been conducted in China on the use of this material in concrete. Previous studies considered binary, ternary, and quaternary combinations, such as LRR-cement [5,[8][9][10][11][12][13][14][15][16], LRR-fly ash (FA) [16][17][18][19], LRR-silica fume (SF) [4], LRR-triisopropanolamine (TIPA) [20], LRR-limestone powder (LP) [21,22], LRR-crushed limestone [11,23], LRR-iron slag [19], LRR-ground granulated blast furnace slag (GGBFS) [17], and LRR-GGBFS-FA [17]. The researchers used LRR as a SCM in both dry [3][4][5] and wet [10,14,24] state of mixing.…”