Microwave Curing Effect on Internal Sulphate Damage in Nano Alumina Reinforced White Cement

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

Kaplan, Gokhan^1 ; Demircan, Ruya Kilic^2 ; Cakmak, Coskun^2 ; Gultekin, Arzuhan Burcu^3

Kastamonu University, Kastamonu Vocational School, Construction Depart., Turkey^1

Gazi University, Technology Faculty, Civil Engineering Department, Turkey^2

Ankara University, Department of Real Estate Development and Man., Turkey^3

关键词: Architectural concrete;    Cement paste;    Microstructural investigation;    Microwave curing;    Nano-alumina;    Power applications;    Thermal curing;    White cement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/3/032038/pdf
DOI  :  10.1088/1757-899X/471/3/032038

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

In this study, microstructural investigation was carried out to analyse the internal sulphate damage in the nano-Al2O3 (nAl) reinforced white cement pastes. As white cement is generally used in the production of architectural concrete, 52.5 R type white cement was preferred in the scope of the study. Nano Al2O3 was substituted into the cement paste at 0% and 5% ratios. Three different methods were used for microwave curing. Different microwave curing techniques were performed as 120 minutes of 100 Watt application, 75 minutes of 100 Watt-30 minutes of 150 Watt-15 minutes of 200 Watt application, and 90 minutes of 100 Watt-15 minutes of 150 Watt-15 minutes of 200 Watt. In order to accelerate the formation of DEF damage, Na2SO4 was added to the cement paste at 2%, and 5% ratios. Three different microwave curing methods were used to investigate the occurrence of DEF damage in nano Al2O3 reinforced concrete concretes. In the pastes produced for this purpose, dense ettringite structure was observed. In cement pastes without nAl, the ettringite structure had a low S / Ca ratio (