INCREASING WATER RESISTANCE OF GYPSUM BINDERS
Journal Title: Вісник Національного університету "Львівська політехніка". Серія "Теорія та практика будівництва" - Year 2018, Vol 0, Issue 888
Abstract
One of the possible ways of restoring and further effective development of the construction industry with small investments is to expand the production and use of low-energy nonclinker binders. The use of gypsum and gypsum-cement-pozzolanic binder, obtained with the use of various waste and related products from other sectors of the national economy is perspective in this direction. It provides an increase of binders` required properties and improves their technical and economic indicators, solving to a certain extent the problems of ecology. In addition, the processes of gypsum hydration and dehydration, its widespread natural distribution, make it a sustainable resource, which can be recycled many times. This is a key element in the sustainable development. An analysis of literary sources concerning methods of water resistance increase of gypsum binders is represented in this article. It is shown that water resistance increase of gypsum products is achieved by reducing the solubility of gypsum; reduction of water-gypsum ratio; impregnation of products with substances that prevent penetration of water. Mineral additives, including industrial waste, are purposefully used for the purpose of modifying gypsum based compositions to increase strength, water resistance, durability, and chemical resistance of obtained materials and products. An important technological method, which provides an increase in the rate of reaction, is the activation of the binder with an increase in its specific surface. The paper presents the results of the study of admixtures and additions influence on the properties of gypsum binder, in particular on its water resistance. The influence of fly ash and Portland cement on the properties of gypsum has been established. It is shown that the greatest increase in strength and water resistance of gypsum is achieved due to mechanical activation of fly ash and Portland cement in the composition of gypsum-cement-pozzolanic binder. The strength increase of gypsum-cement-pozzolanic binder on the basis of activated fly ash and Portland cement is 32 %, and the softening factor is 89 %.
Authors and Affiliations
Petro Novosad, Myroslav Sanytsky, Oksana Poznyak
Keywords
Related Articles
- EP ID EP494711
- DOI -
- Views 102
- Downloads 0
SOFTWARE FOR 4D MODELLING OF CONSTRUCTION PROJECTS
Most complex projects in the Architecture, Engineering, and Construction industries involve multidisciplinary collaboration and the exchange of large building data set. Traditionally, the collaboration efforts across the...
Покращення експлуатаційних властивостей керамічної цегли поверхневим модифікуванням поверхні
In the article there are substantiated and determine the optimal composition of protective covering by the mathematical planning method with taking into account the influence of protective covering on water absorption, a...
Thermo-physical evaluation of an ultra-low-energy family house
Ultra-low-energy house is a term known very well to engineers and architects all over the world. In these times of minimizing an energy loads and negative emissions, energy efficient houses are one of the best ways to me...
Application of CFD for interior flow analysis influenced by exterior conditions
The aim of the paper is the presentation of application CFD analisys for interior flows in chimneys and flats in a building. It is a summary of a case study of fatal intoxication by carbon monoxide coming from a gas heat...
Ефективність використання сонячного колектора, суміщеного з покрівлею будинку в системі сонячного теплопостачання
The prospects for the development of solar energy in the world are analyzed. Of the existing types of renewable energy most promising scale resources, environmental cleanliness and the prevalence is solar energy. This is...