Effective use of dry foaming agents in the manufacture of foam gypsum thermal insulation nanocompositions

Effective use of dry foaming agents in the manufacture of foam gypsum thermal insulation nanocompositions

Introduction. The elaboration of foamed eco-friendly gypsum nanocomposites with low specific gravity, high thermal insulation, operational and technical and economic characteristics remains an urgent task. Controlled hardening of gypsum foam nanoassemblers using dry foaming agents is a promising dir...

Full description

Saved in:
Bibliographic Details
Published in:Nanotehnologii v stroitelʹstve Vol. 14; no. 4; pp. 274 - 281
Main Authors: Shigapov, R.I., Sinitsin, D.A., Khalikov, R.M., Solovyeva, E.A., Nedoseko, I.V.
Format: Journal Article
Language:English
Published: Moscow LLC CNT NanoStroitelstvo 01-01-2022
OOO "CNT «NanoStroitelstvo
Subjects:
Acoustic insulation
Air bubbles
Building materials
Composition
Compressive strength
Construction materials
Density
Desiccants
foam gypsum nanomaterials
Foaming agents
Gypsum
Hardening
hardening of nanocomposite
Historical buildings
Insulation
Kinetics
Liquid phases
Mixtures
Nanocomposites
Nanomaterials
Production methods
Solid phases
Sorbents
Specific gravity
structure formation of foam gypsum
Thermal conductivity
Thermal insulation
Three dimensional printing
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Introduction. The elaboration of foamed eco-friendly gypsum nanocomposites with low specific gravity, high thermal insulation, operational and technical and economic characteristics remains an urgent task. Controlled hardening of gypsum foam nanoassemblers using dry foaming agents is a promising direction in the technology of production of heat-insulating building materials. Methods and materials. The production of a foam gypsum composition was carried out in an ejector-turbulent mixer by mixing a gypsum nanobinder with functional foaming nanoadditives. Building gypsum G5 BII was used as a binder in the work; porization of gypsum compositions was carried out using an adsorbed foaming agent PBNS. Results. The transformation of liquid-phase foaming agents into solid-phase ones by binding water allows the production of gypsum foam compositions from dry mixtures, which gives high dosing accuracy, a good degree of homogenization of components and stable characteristics of foamed gypsum nanocompositions. In production conditions, a one-storey small-sized pavilion was built using a pilot 3D printer AMT S1160, in which vertical enclosing structures are filled with foamed heat-insulating nanostructured foam gypsum. Monolithic foam gypsum nanomaterial with a density of 300-400 kg/m3 was used for insulation and sound insulation of attic floors during the overhaul of the historic building of the Veterans Hospital in Ufa. Discussion. The elaboration of technology for obtaining foam gypsum from dry mixtures is based on the advantage of manufacturing and using thermal insulation nanocompositions, which allows for significant punctuality of dosing and stable characteristics of foam gypsum building materials. Surfactants have a significant effect on the kinetics of the structure formation of the foam gypsum nanocomposition and slow down the coalescence of air bubbles. Conclusions. Nanoporous foam gypsum concrete, obtained as a result of controlled hardening, with a density of 400 kg/m3 has a thermal conductivity of 0.12 W/(m·°C) and a compressive strength of 1.4 MPa. The compressive strength of foamed foam gypsum using a dry foaming agent on sorbents is 17% higher than the strength of a heat-insulating nanomaterial prepared using traditional technology.
ISSN:2075-8545
2075-8545
DOI:10.15828/2075-8545-2022-14-4-274-281