Influence of limestone content, fineness, and composition on the properties and microstructure of alkali-activated slag cement

Assessing the chemical involvement of limestone powder in sodium carbonate activated slag

“…4). The results are in agreement with Rakhimova et al [22], however, they stated that this is mainly due to the ''physical activity'' of LP. It is clear that the incorporation of LP densifies the microstructure and provides extra surface area for the precipitation of reaction products, which benefits the strength development.…”

“…As shown in Table 4, the amounts of calcite of all samples after a long period of curing are remaining at the same levels, indicating that the released CO 3 2-anions from gaylussite are transferred to other phases such as hydrotalcite-like phases. However, different from Rakhimova et al [22], the formation of a new phase, natron (Na 2 CO 3 Á10H 2 O), is clearly observed for the samples containing C15% LP. In this case, it is most likely that insufficient ions are released from slag particles to react with CO 3 2-anions when the dosage of LP is high, leading to the formation of natron.…”

“…However, no trace of chemical involvement can be identified as there are no monocarboaluminate or new phases found on the XRD pattern. Most recently, Rakhimova et al [22] studied the influence of different LP on the properties of slag activated by sodium carbonate based waste and found that the 28 days strength was not weakened up to 50% addition of LP (Blain fineness C400 m 2 /kg). However, they stated that the benefits on the strength development is mainly attributed to the ''physical activity'' of LP.…”

Phase modification induced drying shrinkage reduction on Na2CO3 activated slag by incorporating Na2SO4

“…It is known that the reaction products, mechanical properties and durability of AAS significantly differ with different activators applied [4,5]. The material properties of AAS together with the effect of additives [6][7][8][9] using various sole activators have been extensively reported. However, the performance of hybrid activators on activation has been rarely investigated [10][11][12], especially the durability related properties, e.g.…”

The influence of waste chromia-alumina catalyst and burning temperature on physicomechanical properties of ceramics based on fusible clay

“…At the same time, this waste is -dissipated feedstock. Therefore, measures for reduction the generation and reclamation are fundamental, for example, they can be effectively used in the form of supplements [2][3][4][5][6][7][8][9][10][11][12][13][14][15] for adjustment the properties of various construction materials (nonfired refractory, heat-resistant porous concrete, rustinhibitive pigment, fire-resistant mastics, cement, gypsum, bituminous-concrete and ceramic compositions). In that context, assessment of the impact of waste of chromiaalumina catalyst (hereinafter CAC) (Nizhnekamsk city, Republic of Tatarstan) on physical and mechanical properties and the toxicity of the fired ceramic, which based on low-melting clay, is a topical area of research.…”