Heat-insulating Finishing Composition of the Optimal Structure with Microspheres

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

土木建筑工程;文学

Ivanovna, Loganina Valentina^1 ; Vladimirovich, Frolov Mikhail^1

Penza State University of Architecture and Construction, Germana Titova st.440028, Penza, Russia^1

关键词: Expanded vermiculite;    Highly porous materials;    Hollow glass microspheres;    Hollow microsphere;    Optimal structures;    Performance properties;    Thermal insulation coatings;    Thermal insulation properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/3/032010/pdf
DOI  :  10.1088/1757-899X/471/3/032010

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

As fillers in most heat-insulating finishing compounds, various highly porous materials with high open microporosity and moisture capacity are used - expanded vermiculite sand and expanded perlite sand. In composites based on such compositions in the pore structure, open pores predominate, which is why the performance properties deteriorate, the strength and water resistance of the resulting coatings decrease. Of great interest is the use as fillers of materials with closed microporosity - glass hollow microspheres and ash microspheres of aluminosilicate. The aim of the work is the development of a model for the heat-insulating composite of the optimal structure, which allows to minimize the consumption of the binding agent by achieving the maximally dense packing of the microspheres. On the basis of the developed model, the optimal content of hollow glass microspheres and ash microspheres of aluminosilicate, in the case of cement and lime as binding agent, was calculated in heat-insulating composites. The average density of composites of the optimal structure for each pair of "binder-filler" is predicted. It has been established that the composites of the optimal structure obtained with the use as binder of lime will have a lower density in comparison with composites obtained using binder cement. As a result of the conducted studies, the possibility of effective use of lime as a binder in heat-insulating composites obtained with the use of microspheres was identified. When it is used, it is possible to significantly reduce the density of the resulting thermal insulation coatings, thereby increasing their thermal insulation properties and vapour permeability.