Abstract
| Original language | Unknown |
|---|---|
| Pages (from-to) | 146-156 |
| Journal | Cement & Concrete Composites |
| Volume | 29 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jan 2007 |
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Petrographic and mechanical aspects of accelerated ageing of polymeric mortars. / Simão, Joaquim António dos Reis Silva; Silva, Manuel Américo Gonçalves da; Silva, Zenaide Carvalho Gonçalves da.
In: Cement & Concrete Composites, Vol. 29, No. 2, 01.01.2007, p. 146-156.Research output: Contribution to journal › Article
TY - JOUR
T1 - Petrographic and mechanical aspects of accelerated ageing of polymeric mortars
AU - Simão, Joaquim António dos Reis Silva
AU - Silva, Manuel Américo Gonçalves da
AU - Silva, Zenaide Carvalho Gonçalves da
PY - 2007/1/1
Y1 - 2007/1/1
N2 - An educated estimate of changes of mechanical properties of polymeric mortars under environmental actions requires further knowledge since data are insufficient and the understanding of alterations incomplete. An experimental program to generate information on those aspects for artificially aged coupons of polyester and epoxy mortars is described. At pre-established temporal stages, flexural tensile bending and compression strength of coupons was determined and compared. Environmental conditioning consisted of cycles of (i) temperature; (ii) humidity and (iii) salt fogging, emphasis being, herein, placed on the effects of the temperature and humidity cycles. Thin lamellae of the tested coupons were cut along the ageing process and observed under petrographic microscope. Changes on the aspect of air voids and textures are reported. A systematic SEM study of the mineralogical and textural aspects is also presented that qualitatively contributes to the interpretation of the results. Higher degradation was detected in the samples submitted to the temperature and salt fogging cycles selected in the study and seen to intensify past 3000 It of accelerated environmental action.
AB - An educated estimate of changes of mechanical properties of polymeric mortars under environmental actions requires further knowledge since data are insufficient and the understanding of alterations incomplete. An experimental program to generate information on those aspects for artificially aged coupons of polyester and epoxy mortars is described. At pre-established temporal stages, flexural tensile bending and compression strength of coupons was determined and compared. Environmental conditioning consisted of cycles of (i) temperature; (ii) humidity and (iii) salt fogging, emphasis being, herein, placed on the effects of the temperature and humidity cycles. Thin lamellae of the tested coupons were cut along the ageing process and observed under petrographic microscope. Changes on the aspect of air voids and textures are reported. A systematic SEM study of the mineralogical and textural aspects is also presented that qualitatively contributes to the interpretation of the results. Higher degradation was detected in the samples submitted to the temperature and salt fogging cycles selected in the study and seen to intensify past 3000 It of accelerated environmental action.
U2 - 10.1016/j.cemconcomp.2006.08.003
DO - 10.1016/j.cemconcomp.2006.08.003
M3 - Article
VL - 29
SP - 146
EP - 156
JO - Cement & Concrete Composites
JF - Cement & Concrete Composites
SN - 0958-9465
IS - 2
ER -