Lightweight Concretes Based on Glassy Aggregates are the Future of Envelope Structures

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

土木建筑工程;文学

Davidyuk, Alexei^1 ; Davidyuk, Artem^2 ; Rumyantsev, Igor^3

Research Design and Technological Institute of Concrete and Reinforced Concrete, 2nd Institutskaya Street 6, Moscow

109428, Russia^1

Moscow State Construction University (National Research University), Yaroslavl Highway 26, Moscow

129337, Russia^2

Joint-Stock Company 'Design and Engineering Bureau of Concrete and Reinforced Concrete', 2nd Institutskaya Street. P. 15 A 6, Moscow

109428, Russia^3

关键词: Aggregate grains;    Alkali component;    Concrete properties;    Envelope structures;    Insulating properties;    Physical characteristics;    Porous aggregates;    Process fundamentals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/3/032028/pdf
DOI  :  10.1088/1757-899X/471/3/032028

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The paper discusses physical and mechanical, and heat-insulating properties of lightweight structural and insulating concretes based on various glassy aggregates - quenched cullets. Quenched cullet represents a fired aggregate that has a bulk density equal to 150-300 kg/m3 and cylinder strength of 0.5-2 MPa, which has been produced by pretreatment of silica rocks with an alkali component followed by firing in rotary kilns. It has been established that the aggregate grain's glassy envelope has a closed, evenly distributed porosity with a high content of the glass phase and improved strength and thermal and physical characteristics. Influence of the glass phase as part of a porous aggregate on the totality of concrete properties - structural, thermal and hydrophysical - has been found. Process fundamentals and standardization support for practical application of lightweight concretes featuring density D500-800 kg/cm3 and strength grades B2.5-7.5 in envelope structures with high heat-insulating properties have been developed.