Setting Time, Compressive Strength, and Photon Attenuation Properties of Cement Mortars Produced with Nano-SiO2

Yıl 2023, Cilt: 28 Sayı: 3, 1029 - 1042, 29.12.2023

Namık Yaltay

https://doi.org/10.53433/yyufbed.1329695

Öz

In this study, initial and final setting time, compressive strength, and photon attenuation properties of cement mortar samples produced with 0.5%, 1%, 2%, and 4% nano-scale SiO2 addition were investigated. For this purpose, cement mortar samples were prepared and cured for 1, 2, 7, 28, and 90 days. Increases in compressive strength values were observed in the early curing ages, with a slight decrease of 3.17% and 0.33% for low nano-SiO2 rates (0.5% and 1%) in later ages. In addition, these results were evaluated with Scanning Electron Microscope (SEM) images. In the samples added 4% nano-SiO2, there was a 13.3% and 9.09% reduction in the initial and final setting times, respectively. Furthermore, mass attenuation coefficients were compared for different cure ages. It was aimed to determine the effect of the curing time on the photon attenuation property by adding nano-SiO2 to the concrete.

Anahtar Kelimeler

Cement mortar, Compressive strength, Mass attenuation coefficient, Nano-SiO2, Setting time

Nano-SiO2 ile Üretilen Çimento Harçlarının Priz Süresi Basınç Dayanımı ve Foton Zayıflatma Özellikleri

Öz

Bu çalışmada, %0.5, %1, %2 ve %4 nano boyutlu SiO2 ilavesi ile üretilen çimento harcı numunelerinin priz başlangıç ve bitiş süreleri, basınç dayanımları ve foton zayıflatma katsayıları incelenmiştir. Bu amaçla çimento harcı numuneleri hazırlanmış ve 1, 2, 7, 28 ve 90 gün kür edilmiştir. Erken kürleme yaşlarında basınç dayanımı değerlerinde artışlar gözlenirken, ileri yaşlarda ve düşük nano-SiO2 eklemelerinde (%0.5 ve %1) basınç dayanımları %3.17 ve %0.33 oranında azalmıştır. Ayrıca bu sonuçlar Taramalı Elektron Mikroskobu (SEM) görüntüleri ile değerlendirilmiştir. %4 nano-SiO2 ilave edilen numunelerde priz başlangıç süresinde %13.3, priz bitiş süresinde ise %9.09 oranında azalma olmuştur. Ayrıca farklı kürlenme yaşları için kütle zayıflatma katsayıları karşılaştırılmıştır. Çalışmada kür süresinin, betona Nano SiO2 eklenmesi ile foton zayıflatma özelliğine yapacağı etkinin belirlenmesi hedeflenmiştir.

Anahtar Kelimeler

Basınç dayanımı, Çimento harcı, Kütle zayıflatma katsayısı, Nano-SiO2, Priz süresi

Kaynakça

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