ZEMİNLERDE TEK FAZLI GEOPOLİMERİZASYON UYGULAMASI VE GEOPOLİMERİZASYONUN SERBEST BASINÇ MUKAVEMETİ ÜZERİNDEKİ ETKİSİ

Year 2020, Volume: 8 Issue: 3, 466 - 478, 03.09.2020

Tugba Eskisar Gizem Aksu

https://doi.org/10.36306/konjes.611595

Abstract

Bu çalışmada likit aktivatörler ile yapılan tek fazlı geopolimerizasyon sonucu kil, killi kum, kum
zeminlerde gözlenen mukavemet değişimleri incelenmiştir. Örnek grupları deney planına uygun olarak 7
günden 90 güne değişen sürelerde küre tabi tutulmuştur. Geopolimerizasyon metodunun, aktivatör
içeriğinin ve oranlarının, kür sürelerinin ve donma-çözünme çevrimlerinin serbest basınç mukavemeti
üzerindeki etkisi belirlenmiştir. Farklı likit aktivatör içeriklerinin başarısının, zeminin türü ve
geopolimerizasyon metodundan önemli ölçüde etkilendiği bulunmuştur. Kum ve killi kum örneklerinde
optimum su içeriği kadar likit aktivatör kullanılması iyileştirme sağlarken, kil zemin örneklerinde
optimum su içeriğinin yaklaşık iki katı kadar likit aktivatör kullanılması mukavemeti artırmaktadır.
Mukavemet ayrıca kür süresinin uzaması ile artmaktadır. İşlem görmeyen kil zeminin mukavemeti 315
kPa iken 90 gün sonunda aynı zemin örnekleri 1114 kPa mukavemete ulaşmıştır. Donma-çözünme
çevrimleri uygulanan zeminlerde ise belirgin bir mukavemet azalımı görülmüştür. En fazla mukavemet
kaybı yine kil zeminlerde gözlemlenmiş ve 3 çevrim sonunda mukavemet %55 kadar azalmıştır.

Keywords

Kil, Killi kum, Kum, Aktivatör, Serbest basınç mukavemeti

A Single Phase Geopolimerization Application In Soils And The Effect Of Geopolimerization On The Unconfined Compressive Strength

Abstract

In this study, single phase geopolymerization with liquid activators were applied to clay,
clayey sand and sand soils and unconfined compressive strength developments due to this process was
investigated. The samples were subjected to curing times varying between 7 and 90 days of curing in
accordance with the experimental programme. The effects of geopolimerization metod, activator content
and rate, curing time and of freeze-thaw cycles on the unconfined compressive strength of the soils were
determined. It has been found that the success of different liquid activator contents is significantly affected
by the type of soil and geopolymerization method. It was sufficient to treat sand and clayey sand samples
with liquid activator amounts that are equal to the optimum water contents of the soils, while the use of
liquid activator approximately twice the optimum water content in clay soil samples was necessary to
increase the strength. The increase in the curing times also increased the strength of the samples. While
the untreated clay samples had an unconfined compressive strength of 315 kPa, after 90 days of curing,
1114 kPa strength was observed. The application of freeze-thaw cycles decreased the strength of the soils.
Major loss of strength was observed in clay soils with a decrease of %55 strength.

Keywords

Clay, Clayey sand, Sand, Activator, Unconfined compressive strength

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