Investigation of sulfate resistance and alkali silica reaction in polymer-incorporating mortars

In this study, sulfate resistance and alkali silica reaction in mortars incorporating polymer were investigated. In this aim, normal portland cement and styrene-acrylic polymer emulsion were used. Mortar mixtures were prepared by replacing cement, with 0, 5, 10 and 15% polymer, by weight. 28-days compressive and flexural strength, water absorption and water sorptivity, porosity and unit weight of prepared mortar specimens were determined. Besides, sulfate resistance and alkali silica reaction resistance of prepared mortar mixtures were determined according to ASTM C1012 and ASTM C1260, respectively. Results obtained in polymeric mortar mixtures were comparatively evaluated with control mortar mixture.

Polimer ilaveli harçlarda sülfat etkisinin ve alkali silis reaksiyonunun incelenmesi

Bu çalýþmada, polimer ilaveli harçlarýn sülfat etkisine ve alkali silika reaksiyonuna karþý direnci incelenmiþtir. Bu amaçla, baðlayýcý olarak normal portland çimentosu ve stiren-akrilik polimer emülsiyonu kullanýlmýþtýr. Polimer aðýrlýkça %0, 5, 10 ve 15 oranlarýnda çimento yerine ikame edilerek harç karýþýmlarý hazýrlanmýþtýr. Hazýrlanan harç örneklerinin 28 günlük basýnç ve eðilme dayanýmlarý, kýlcal yolla su emme, porozite, birim aðýrlýk gibi özellikleri belirlenmiþtir. Ayrýca harç karýþýmlarýnýn ASTM C1012 standardýna göre sülfat direnci, ASTM C1260 standardýna göre alkali silis reaksiyonuna karþý direnci saptanmýþtýr. Polimer ilaveli harçlarda elde edilen sonuçlar kontrol harcý ile kýyaslamalý olarak deðerlendirilmiþtir.