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Notch effect on strength of polymer-modyfied mortar
Konferencja
V Konferencja Naukowa Rzeszowsko-Lwowsko-Koszycka Aktualne problemy budownictwa i inżynierii środowiska, Rzeszów, 25-26 września 2000. Cz.1. Budownictwo
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Abstrakty
In this article have been presented results of flexure strength of polymer-modified mortars. There was used the mortars with 1:2,5 ratio and silica fume in amount 5 % weight of cement. Water/cement ratio in mortars has been taken between 0,30 and 0,42. Mortars were modified with epoxy resin emulsified in water. Polymer amount was 0-10 % weight of cement. In bending test were used 4x4x16 cm beams and 4x8x36 cm beams with notch. The addition of polymer has increased flexural strength for beams without notch, while the flexural strength for beams with notch was independent on the addition of polymer. The attempt of obtained result explanation has been taken based on fracture mechanics. Critical stress intensity factor K slc and critical CTODc have been investigated according to TC-89 RILEM recommendation. K slc for all mortars (with and without polymer) were similar. High flexural strength for mortars with polymer may be caused by less defective structure. Less defective structure is the effect of polymer addition probably.
Rocznik
Tom
Strony
319--326
Opis fizyczny
Bibliogr. 3 poz., il.
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autor
- Politechnika Rzeszowska, Wydział Budownictwa i Inżynierii Środowiska
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Bibliografia
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bwmeta1.element.baztech-article-BTB2-0049-0070