Investigating the influence of volumetric hydrophobization on the formation of phase composition of cement stone and its physical-mechanical properties
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 4, Issue 6
Abstract
<p>We have examined the influence of the most widely used silicon-organic surface water repellent GKZH-11K on the physical-mechanical properties and the phase structure formation of cement is the fact that the introduction of the surface water repellent GKZH-11K to the composition of cement slurry leads to the formation of dispersive water-repellent films of various levels (size). These films adsorb at the surface of cement grains, as well as at the surface of hydrated components of cement particles, Са(ОН)<sub>2</sub>, calcium sulphoaluminates. It was determined that the disperse hydrophobic films partially block the penetration of water into the surface of cement grains and alter the kinetics of hydration.</p><p>This leads to a decrease in the degree of hydration and the content of Са(ОН)<sub>2</sub> in cement stone, resulting in the reduced shrinkage at hardening. At the same time, the disperse films adsorbed on neighboring hydrated cement particles within the contacts occurred in the process of their condensation can form hydrogen and chemical relationships. This interaction between the particles' films, despite the reduction in the degree of hydration, leads to a decrease in water absorption, improving the strength of cement stone, which in this case is also determined by the number and area of contacts per unit volume of cement stone. The overlap of pores with hydrophobic chains decreases the permeability of cement stone throughout its entire volume, which contributes to the growth of operational reliability and durability of structures, particularly thin-walled. Using this admixture for volumetric hydrophobization could greatly prolong repair-free operation of thin-walled products and structures, as well as bring down cost as there is no need to apply materials to protect the surface of concrete.</p>
Authors and Affiliations
Inna Trofimova, Nikolay Shpyrko
Keywords
Related Articles
- EP ID EP666894
- DOI 10.15587/1729-4061.2019.176430
- Views 73
- Downloads 0
Design of fire-resistant heat- and soundproofing wood wool panels
<p>The conducted research revealed the possibility to manufacture heat- and soundproofing materials for the arrangement of buildings. Wood fibers, which are produced in the form of flat panels, are the raw materials for...
Modeling a thermal conductivity process under the action of flame on the wall of fireretardant reed
<p>Creating environmentally friendly flame-retardant materials for natural inflammable roof structures will make it possible to control the processes of thermal stability and physical-chemical properties of a protective...
Preparation of triticale flour by ion-ozone treatment for pasta quality improvement
<p>Currently, much attention is paid to the production of organic food. The scientific concept of nanoscience examines the synthesis of an ion-ozone mixture without harmful impurities of nitrogen and carbon oxides in the...
Influence of ultrasound and template on the properties of nickel hydroxide as an active substance of supercapacitors
<p>Nickel hydroxide is widely used as an active material<span style="text-decoration: line-through;">s</span> of supercapacitors. The most active are Ni(OH)<sub>2</sub> (α+β) samples with layered structure synthesized in...
Development of a method for the probabilistic inference of sequences of a business process activities to support the business process management
<p class="a"><span lang="EN-US">Models of temporal rules of execution of the business process actions were proposed for the use in absence in the process model of complete information on the reasons for execution of thes...