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Influence of HEMC and EVA polymers on some properties of dry-set mortars
From the tests performed with dry-set mortars containing different contents of EVA and HEMC polymers, it was possible to conclude that: HEMC polymer sharply increases the water retention capacity of the mortars up to a content of 0.5 % on the weight of cement. EVA effect is not significant in the tested content range (0 to 7 %). HEMC caused a reduction respectively of 46 and 62 % on splitting tensile and compressive strengths. On the other hand, there is an increase in sigma t/sigma c ratio for HEMC contents up to 1 %. EVA caused a reduction of compressive strength but an increase of splitting tensile strengths in mortars with more than 2 % EVA due to the better adhesion between cement paste and aggregates, and due to the prevention of microcracks growth. The tensile bond strength increases with higher HEMC contents, but the results are approximately constants for contents higher than 0.5 %. EVA seems to cause an increase in strength values, but the results show a greater dispersion in the range studied (0 % to 7 %). Some kind of interaction seems to occur between HEMC and EVA polymers when they are present in the same aqueous solution. This conclusion may be drawn from the both the fresh and hardened mortar tests, where a fluctuation of test results was found without any other apparent cause. The evaluation of such an interaction will be performed in the near future.
Influence of HEMC and EVA polymers on some properties of dry-set mortars
From the tests performed with dry-set mortars containing different contents of EVA and HEMC polymers, it was possible to conclude that: HEMC polymer sharply increases the water retention capacity of the mortars up to a content of 0.5 % on the weight of cement. EVA effect is not significant in the tested content range (0 to 7 %). HEMC caused a reduction respectively of 46 and 62 % on splitting tensile and compressive strengths. On the other hand, there is an increase in sigma t/sigma c ratio for HEMC contents up to 1 %. EVA caused a reduction of compressive strength but an increase of splitting tensile strengths in mortars with more than 2 % EVA due to the better adhesion between cement paste and aggregates, and due to the prevention of microcracks growth. The tensile bond strength increases with higher HEMC contents, but the results are approximately constants for contents higher than 0.5 %. EVA seems to cause an increase in strength values, but the results show a greater dispersion in the range studied (0 % to 7 %). Some kind of interaction seems to occur between HEMC and EVA polymers when they are present in the same aqueous solution. This conclusion may be drawn from the both the fresh and hardened mortar tests, where a fluctuation of test results was found without any other apparent cause. The evaluation of such an interaction will be performed in the near future.
Influence of HEMC and EVA polymers on some properties of dry-set mortars
Einfluß von HEMC und EVA Polymeren auf einige Eigenschaften von Trockenmörteln
Silva, D.A. da (author) / Roman, H.R. (author) / Alarcon, O.E. (author)
2000
10 Seiten, 9 Bilder, 4 Tabellen, 9 Quellen
Conference paper
English
| British Library Conference Proceedings | 2008
| DOAJ | 2023
Influence of EVA and acrylate polymers on some mechanical properties of cementitious repair mortars
| Online Contents | 2009
Influence of EVA and acrylate polymers on some mechanical properties of cementitious repair mortars
| Online Contents | 2009
Influence of EVA and acrylate polymers on some mechanical properties of cementitious repair mortars
| British Library Online Contents | 2009