Developed heat-insulating dry mortar mixes for the finishing of aerated concrete walls
- 1 September 2021
- journal article
- research article
- Published by Thomas Telford Ltd. in Magazine of Concrete Research
- Vol. 73 (17), 890-903
- https://doi.org/10.1680/jmacr.19.00446
Abstract
The paper presents new compositions of lime heat-insulating dry building mixtures, designed specifically for the finishing of aerated concrete, differing in the presence of a modifying additive based on aluminosilicates and calcium hydrosilicates as well as highly porous filler – microspheres. The beneficial effect of a modifying additive based on a mixture of aluminosilicates and calcium hydrosilicates with high pozzolanic activity on the structure formation of lime finishing compounds has been established, which is manifested in a decrease in the content of free lime to 28.6%, an increase in plastic strength, an increase in the softening coefficient 2.2 times. It has been revealed that when using limestone heat-insulating dry construction mixtures of hollow glass microspheres and ash aluminosilicate microspheres, the crack resistance of the resulting coatings increases by reducing shrinkage deformations during the hardening process, increasing the ultimate tensile properties and cohesive strength of the finishing coating, and water resistance increases due to the formation of a composite structure with a closed porosity. Coatings based on the developed dry construction mixture are distinguished by low density and thermal conductivity, high vapor permeability while possessing a sufficiently high crack resistance and weatherability.Keywords
This publication has 49 references indexed in Scilit:
- Modeling moisture condensation in humid air flow in the course of cooling and heat recoveryEnergy and Buildings, 2016
- Combined effect of silica fume and expanded vermiculite on properties of lightweight mortars at ambient and elevated temperaturesConstruction and Building Materials, 2015
- Lime–cement mortars for coating with improved thermal and acoustic performanceConstruction and Building Materials, 2015
- Effect of viscosity of petroleum products on deformation properties of concreteMagazine of Civil Engineering, 2014
- The identification of organic additives in traditional lime mortarJournal of Cultural Heritage, 2014
- Rheology, fiber dispersion, and robust properties of Engineered Cementitious CompositesMaterials and Structures, 2012
- Experimental Study of External Thermal Insulation Mortar Based on Fly Ash Floating BeadAdvanced Materials Research, 2012
- Mechanisms of cement hydrationCement and Concrete Research, 2011
- Numerical investigation of inelastic buckling of steel–concrete composite beams prestressed with external tendonsThin-Walled Structures, 2010
- Bending and compressive behaviours of a new cement compositeCement and Concrete Research, 2005