USE OF POZZOLANIC ADDITIONS FOR CONCRETE TO RESYST SULFATE EFFECTS

Abstract

The effect of sulfate is one of the important outside influences in the deterioration of concrete and reinforced concrete structures. In this study, pozzolanic additions were added to changing in ratio 20% by weight of the (PÇ. 42.5) portland cement. Prepared samples were exposed in 150 g / L Na2SO4 solution prepared according to ASTMC 1012 for 5 months . In addition, a group were kept in water and compressive strengths are presented as a comparatively. Pozzolanic addition materials were added to portland cement (PÇ 42,5) 0%, 10%, 20%, 30% and 40%by weight of the cement. The highest compressive strength demonstrative of the prepared concrete samples were determined optimum mixing ratio. The highest compressive strength were obtained with % 20-30 pozzolanic concrete samples.

Keywords

• pozzolanic materials, compressive strength, sulfate attack, fly ash, concrete,

SÜLFAT ETKYSYNDE MARUZ BETONDA PUZOLANYK KATKI KULLANIMI

Öz

Beton ve betonarme yapylaryn bozulmasynda sülfat etkisi önemli etkilerden biridir. Bu çaly?mada, beton harçlarda %20 oranynda PÇ 42.5 çimentosunun yerine atyk durumdaki puzolanik katky malzemeyle yer de?i?tirilerek hazyrlanan numuneler ASTM C 1012'ye uygun ?ekilde hazyrlanmy? 150 g/l Na2SO4 çözeltisinde 5 ay süre ile bekletilmi?tir. Ayryca, bir grup suda kür edilmi? ve basynç dayanymlary sülfat çözeltisindekiyle kyyaslamaly olarak sunulmu?tur. Puzolanik katky malzemesini PÇ 42.5 çimentosuyla a?yrlykça (%10-20-30-40) oranyyla kary?tyrylmasyyla hazyrlanan betonlar numunelerden en yüksek basynç dayanymy gösteren numuneyle optimum kary?ym orany belirlenmi?tir. En yüksek basynç dayanymy, % 20- 30 puzolanly betonlarda elde edilmi?tir.

Anahtar Kelimeler

• puzolanik malzeme, basynç dayanymy, sülfat etkisi, uçucu kül, beton,