The aerated concrete based on an integrated foam concentrate containing iron compounds
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2019, Vol 4, Issue 6
Abstract
<p>The chemical processes of Portland cement hydration enable the formation of concrete compressive strength. Under certain conditions, increasing the rate of cement hydration contributes to the improved strength of concrete at compression. This is especially true of the cellular concretes, specifically aerated concretes. The current work has investigated the influence of an integrated admixture that promotes gas formation in obtaining aerated concrete. The specified admixture consists of a mixture of hydrophobic surface-active substance – calcium oleate, perhydrol, and a nanomodifier, a mineral additive containing iron compounds. Feature of this research was the study into a simultaneous influence of hydrophobic surface-active substances, perhydrol, and mineral substances containing iron compounds, on a change in the strength of non-autoclave aerated concrete. The study was necessitated by the insufficient compressive strength of non-autoclave aerated concretes, whose manufacture employs aluminum powder or perhydrol as a gas-forming additive. Using aluminum powder does not provide for the homogeneity of its distribution throughout the volume of concrete; in addition, the cost of aluminum powder is rather high. It was established in the course of our study that the specified integrated admixture changes the character of strength formation in aerated concretes, specifically it increases its magnitude. It has been proven that in order to control the processes of cement hardening and to form the strength of artificial stone, which is obtained in the process of cement hydration, it is possible, in the manufacture of aerated concrete based on perhydrol, to use the admixtures-nanomodifiers containing compounds of iron, thereby improving the absolute magnitude of compressive strength of such concretes at the age of 28 days. The most effective is to use the nanomodifiers that contain a mixture of iron compounds, which leads to an increase in the strength of aerated concrete by up to 50 %.</p>
Authors and Affiliations
Alexsandera Shishkina, Oleg Nastich, Kateryna Romanenko, Svitlana Oliinyk
Keywords
Related Articles
- EP ID EP666896
- DOI 10.15587/1729-4061.2019.176910
- Views 77
- Downloads 0
Construction of models for estimating the technical condition of a hydrogenerator using fuzzy data on the state of its local nodes
<p>The task on estimating the technical condition of a hydrogenerator under conditions of fuzzy information has been resolved. To this end, a series of models have been constructed for the integrated estimation of the te...
Development of signal converter of thermal sensors based on combination of thermal and capacity research methods
<p class="a"><span lang="EN-US">The problem of functional integration of thermal and capacity research methods, which provides the possibility of realizing a new generation of analog frontend of the Internet of Things i...
Devising a procedure to choose optimal parameters for the electromechanical shock absorber for a subway car
<p>A procedure for determining basic estimation parameters has been devised for the proposed structure of the electromechanical shock absorber. The procedure is based on a simplified mathematical model for determining th...
Method for the detection of smallsized air objects by observational radars
<p>We proposed the introduction of an additional mode of dispersed reception and the combination of one-position and multiple reception of signals to the existing one-position observation radar. We improved the algorithm...
Defining the measures to rationally manage the sustainable development of agricultural land use
<p>The issue of socio-economic development of rural areas was explored. It was substantiated that the state policy should be aimed at mobilizing labor, financial, material and organizational resources, strengthening the...