Лако-красочные материалы — производство

* Andrea Bernasconi and Md Kharshiduzzaman Politecnico di Milano, Dipartimento di Meccanica, Milano, Italy Abstract In modern engineering applications, use of bonded composite joints is becoming increasingly widespread due to the numerous advantages over conventional mechanical fastening. For load bearing applications, fatigue cracks, either induced by defects or by applied stresses, may appear and propagate, […]

Table 3 reports the physical and mechanical properties of the designed mortars. The physical properties of the designed mortars differ insignificantly, indicating that the nano-titania addition neither modified the microstructure, nor affected the hygric behaviour of the materials. The lowest Fc values were recorded for the NHL samples with a B/A=1 (NHLT1), while the Fc […]

Physico-Chemical Evaluation of Stones to Be Adhered and Adhesive Mortars The mineralogical composition, according to the Rietveld method, and the measured mechanical strength of stones to be adhered are presented in Table 2. According to these results, the Aktites stone samples (D1, D3) are hard and compact micritic dolomitic limestones, with a low to medium […]

The Aktites and Mounichea stone samples were cut and shaped into specimens with dimensions of: (a) 4^4×4 cm and were used to measure the compressive strength of the stone and (b) 4x4x8 cm that were used to test bonding with the designed mortars. Before applying the adhesive mortars, the stone faces were first incised using […]

Design of Adhesive Mortars: Binders, Fillers and Aggregates Binders of either lime (L: by CaO Hellas) with metakaolin (M: Metastar 501 by Imerys), or natural hydraulic lime (NHL: NHL3.5z by Lafarge), as well as nano-titanium dioxide (T: nano-structured nano-titania by NanoPhos), used as filler due to its photocatalytic activity, were employed for the design of […]

N. Maravelaki, C. Kapridaki, E. Lionakisand A. Verganelaki Technical University of Crete, School of Architectural Engineering, Greece Abstract In this work nano-titania of anatase form has been added to mortars containing (a): binders of either lime and metakaolin or natural hydraulic lime and, (b): fine aggregates of carbonate nature. The aim was to assess the […]

The tool of the one-factor Analysis of Variance (ANOVA), combined to the statistical test of Fisher (usually regarded as the F-test), is the most suitable methodology to state if a factor has an impact (i. e., a significant effect) on one or more response variables. In the present study the ANOVA was applied to process […]

First of all, by looking at Figures 4-5, observing the curves for PFJs joints, it can be remarked that the peak of the release force is often lower than the coupling load maximum value. This result is consistent with previousexperimental outcomes [3] and can be explained, observing that the pin insertion implies chopping the roughness […]

The results related to the investigated ERs, 0.4 and 1.7, are shown in Table 5. The estimated strengths for ER=0.4 and ER=1.7 are compared in the histogram in Figure 7, with indication of the mean values and of the variation band. Considering the data altogether, independently of the value of the ER, the shear strength […]

Two specimens (having ERs of 0.4 and 0.8) were instrumented by strain gages for the estimation of the coupling pressure and of the coefficient of friction. Detailed results are shown in Table 3: an average coefficient of friction of 0.17 was determined. All the results, in particular the amount of force sustained by the adhesive, […]