Investigation of the Effects of Surface Protection Resin on Capillary Water Absorption of Döğer Tuff and Iscehisar Andesite

Abstract

Water is one of the important factors of deterioration due to wetting-drying, freezing-thawing and salt crystallization in natural stones. Water enters into natural building stones in different ways. In addition to water absorption, the capillary water absorption mechanism is of great importance in these deteriorations. The amount of capillary water absorption depends on the pore size distribution of the natural building stones. In this study, the effect of surface protection resin on the capillary water absorption potential of İscehisar andesite and Döğer tuffs in Afyonkarahisar region was investigated. For this purpose, chemical, petrographic-mineralogical (polarizing microscope, XRD), pore size distribution and physico-mechanical properties of the building stones used in the experiments have been determined. In the second stage, experimental studies were carried out to determine the capillary water absorption properties in sodium sulfate (Na2SO4 10H2O) and sodium chloride (NaCl) solution water. The same experiments were repeated on treated samples with water-repellent chemicals. As a result of these studies, water adsorption potential was found of the tested samples the values of 14.70 kg/m2 s 0.5 in normal water, 15.26 kg/m2 s 0.5 in sodium sulphate solution and 15.68 kg/m2 s 0.5 in sodium chloride solution, the capillary water absorption potential of andesites was 1.75, 3.04 and 2.77 kg/m2 s 0.5. The same values were significantly reduced and measured below 1 kg/m2 s 0.5 which the samples of the treated by surface protective resin.

Keywords

• Döğer tuff,İscehisar andesite,natural building stones,salt crystallization,surface protection resin

YÜZEY KORUYUCU REÇİNENİN DÖĞER TÜFÜ VE İSCEHİSAR ANDEZİTİNİN KILCAL SU EMME POTANSİYELİ ÜZERİNE ETKİSİNİN İNCELENMESİ

Abstract

Doğal taşlarda ıslanma-kuruma, donma-çözülme ve tuz kristallenmesine bağlı ayrışmanın önemli faktörlerinden birisi sudur. Su, değişik yollarla doğal yapı taşları bünyesine nüfuz etmektedir. Absorbsiyonun yanı sıra kılcal su emme mekanizması bu ayrışmalarda büyük önem taşımaktadır. Kılcal su emme miktarı, doğal yapı taşlarının gözeneklilik boyut dağılımına bağlıdır. Bu çalışmada, Afyonkarahisar yöresinde doğal yapı taşı olarak kullanılan Döğer tüfü ve İscehisar andezitinin, değişik tuzlu ortamlarda kılcal su emme potansiyeline yüzey koruyucu reçine etkisi incelenmiştir. Bu amaçla önce deneylerde kullanılan yapı taşlarının malzeme karakterizasyonu yapılarak, kimyasal, petrografikmineralojik (polarizan mikroskop, XRD), gözenek çapı dağılımı ve fiziko-mekanik özellikleri belirlenmiştir. İkinci aşamada ise sodyum sülfat (Na2SO4 10H2O) ve sodyum klorür (NaCl) sulu çözeltilerinden kılcal su emme özelliklerini belirlemek amacıyla deneysel çalışmalar yapılmıştır. Aynı deneyler yüzey koruyucu reçine sürülmüş örnekler üzerinde de tekrarlanmıştır. Bu çalışmalar sonucunda Döğer tüflerinin kılcal su emme potansiyeli saf suda 14,70 kg/m2 s 0.5, sodyum sülfatlı çözeltide 15,26 kg/m2 s 0.5 ve sodyum klorürlü sulu çözeltide 15,68 kg/m2 s 0.5, andezitlerin kılcal su emme potansiyeli sırasıyla 1,75; 3,04 ve 2,77 kg/m2 s 0.5 olarak bulunmuştur. Yüzey koruyucu reçine sürülmüş örneklerde aynı değerler önemli ölçüde azalarak 1 kg/m2 s 0.5 değerinin altında ölçülmüştür.

Keywords

• Döğer tüfü,İscehisar andeziti,Doğal yapı taşları,Kılcal su emme,Yüzey koruyucu reçine

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