Study of the Substitution of Limestone Filler With Pozzolanic Additives in Mortars

Stabilization and solidification of Pb in cement matrices

“…Fig. 2 shows that the loss of water in the sample water-cement-Pb is practically the same when compared to sample constituted of water-cement (0.08 versus 0.04%), being agreement with data reported in the literature [33][34][35]. Such results suggest that the presence of Pb did not afford retention of water within the matrix.…”

“…In samples S8, S7 and S5, it is possible to observe the presence of plattnerite (PbO 2 ). Datas obtained from XRD techniques show that leaching does not measurably affect the crystalline structure of the solidified waste sample, as reported in some studies [33][34][35]42]. However, changes in the morphology and cement composition can be analyzed.…”

Characterization of lightweight ferrocement panels containing expanded perlite-based mortar

“…The solid to liquid ratio affects the volume of voids and porosity in the pastes, which directly influences the strength of mortar [33,34]. In this study and similar studies, the hydration products observed are calcium silicate hydrate (gel-like structures), ettringite (needle-like crystals), and calcium hydroxide (plant-like crystals, portlandite) [35,36]. It was observed that the low hydration of EP led to higher porosity in the EPBM.…”

“…14. Thermal analysis revealed the presence of CaCO 3 and Ca(OH) 2 in the sample [35]. DTA curves exhibited endothermic peaks between 100-150°C, 400-500°C and 700-800°C, which refer to the decomposition of ettringite, dehydroxylation of Ca(OH) 2 and decomposition of CaCO 3 , respectively.…”

Compressive behaviour of brick masonry triplets in wet and dry conditions

“…The same problem seems not to have been encountered frequently in the literature and the reason is that different procedures are usually followed for the assessment of lime mortars modulus of elasticity. In most cases, dynamic elastic modulus is measured [47][48][49][50][51], while in others the complex experimental fixture described in ASTM 469-02 for the measurement of E in cylindrical concrete specimens [52] was applied to lime-based mortars [53]. The application of strain gauges is usually limited to the lower surface in the flexural strength test, i.e., in the zone subject to tensile stress [54][55], and however a high standard deviation is reported for E measured according to this procedure with respect to dynamic modulus of elasticity [55].…”