scholarly journals Lime compounds for restoration and decoration of building walls

2021 ◽  
Vol 2124 (1) ◽  
pp. 012022
Author(s):  
V I Loganina ◽  
M V Zaytseva ◽  
T V Uhaeva
Keyword(s):  
Structure Formation ◽  
Silicic Acid ◽  
Liquid Glass ◽  
Chemical Interaction ◽  
Vertical Surface ◽  
Silica Sol ◽  
Optimal Thickness ◽  
Plastic Strength ◽  
Building Walls ◽  
Heat Released

Abstract Information on the effect of a polysilicate solution obtained by mixing liquid glass with a silicic acid sol on the structure formation of lime compositions is presented. It was revealed that the amount of specific heat released when lime is wetted with a polysilicate solution is greater than when lime is wetted with water. This is due to the additionally released heat due to the chemical interaction of lime with polysilicate solution. It was found that the introduction of a polysilicate solution accelerates the development of plastic strength. For comparison, we used liquid glass and a sol of silicic acid as an additive. The synergistic effect of the influence of the polysilicate solution on the structure formation of lime finishing compositions was established, which manifests itself in the acceleration of the set plastic strength in comparison with silica sol and water glass. It has been established that the introduction of a polysilicate solution into the lime mixture formulation contributes to an increase in the resistance to slipping of the finishing layer. The optimal thickness of the finishing layer was determined, which is 20 mm, at which sliding from the vertical surface is not observed.

Characteristics Of The Structure Formation Of Gypsum Binder Modified With Zinc Hydrosilicates

2020 ◽  
pp. 40-46
Keyword(s):  
Synergistic Effect ◽  
Physicochemical Properties ◽  
Structure Formation ◽  
Silicic Acid ◽  
Chemical Properties ◽  
Crystal Formation ◽  
Ability To Act ◽  
Chemical Factors ◽  
Sorption Characteristics

The authors' methodic for assessing the role of chemical and physic-chemical factors during the structure formation of gypsum stone is presented in the article. The methodic is also makes it possible to reveal the synergistic effect and to determine the ranges of variation of controls factors that ensure maximum values of such effect. The effect of a micro-sized modifier based on zinc hydro-silicates on the structure formation of building gypsum is analyzed and corresponding dependencies are found. It is shown that effects of influence of modifier on the properties of gypsum compositions are determined by chemical properties of modifier. Among the mentioned properties are sorption characteristics (which depend on the amount of silicic acid and its state) and physicochemical properties - the ability to act as a substrate during crystal formation. The proposed method can also be extended to other binding substances and materials. This article contributes to the understanding of the processes that occur during the structure formation of composites, which will make it possible to control the structure formation in the future, obtaining materials with a given set of properties.

scholarly journals Recommendations for repairing the facades of the factory building of the “Experienced sports equipment in Moscow”

2018 ◽  
Vol 193 ◽  
pp. 03008
Author(s):  
Victor Kamskov
Keyword(s):  
Structural Design ◽  
Vertical Surface ◽  
Initial Information ◽  
Horizontal Orientation ◽  
Wall Structures ◽  
Depth Analysis ◽  
Building Wall ◽  
Building Walls ◽  
Instrumental Methods ◽  
Factory Building

The article presents the results of performed visual and instrumental surveys that allow to clarify and expand information on the structural design of the walls of the building, the nature of the damage and the cause of their origin. In order to obtain a more complete initial information on the surveyed object, visual and instrumental surveys were additionally carried out to clarify and expand information on the structural design of the building walls, the nature of the damage and the cause of their origin. Project-technical, executive and acceptance documentation for construction, as well as acts of survey of hidden works on the site are absent. By instrumental methods it is established that there is a gap between the surface of the main wall and the facing brick layer and the deviation of the facing layer from the vertical surface. As a result of inspection of the opened window slopes, it is established that the mesh protruding from the main masonry does not enter the lining seams but is bent into the gap. Therefore, the facing layer of masonry, which is devoid of connection with the main wall, operates independently as a self-supporting wall. Therefore, it is necessary to fix the facing layer to the laying of the main wall with steel ties. Examination of the facing of the facing layer revealed the presence of damage in the form of cracks having a vertical and horizontal orientation. Based on the results of the survey, recommendations were developed to ensure reliable and safe operation of the building wall structures in close connection with an in-depth analysis of the causes of these damages.

Properties of Polysiylate Binders for Sol-Silicate Pains

2018 ◽  
Vol 1147 ◽  
pp. 1-4 ◽  
Author(s):  
Valentina Ivanovna Loganina ◽  
Svetlana Nikolaevna Kislitsyna ◽  
Yerkebulan Bisengalievich Mazhitov
Keyword(s):  
Tensile Strength ◽  
Liquid Glass ◽  
High Performance ◽  
Silica Sol ◽  
High Polymer ◽  
Performance Property ◽  
Oxygen Anions ◽  
Kinetics Of ◽  
Silicon Oxygen

Information is provided on the composition of polysilicate solutions obtained by mixing liquid glass and silica sol. It was found that the introduction of the sol leads to an increase in the silicate module and contributes to an increase in the fraction of high-polymer fractions of the silicon-oxygen anions. The results of the kinetics of the variation of α-SiO2 and β-SiO2. It is shown, that coatings based on the polysilicate solutions are characterized by faster curing. The was found correlation between the content of high-polymer fractions of silicic anions in a polysilicate solution and the tensile strength of films. Increase in the g-SiO2 content promote increase in the tensile strength of films. The composition of sol silicate paint is developed. Coatings based on paint have a high performance property.

scholarly journals The use of amorphous silica-alumina-based additive in the adhesive dry mixes of building materials

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Loganina V. I. ◽  
Zhegera Ch.V.
Keyword(s):  
Frost Resistance ◽  
Building Materials ◽  
Chemical Elements ◽  
Physical And Mechanical Properties ◽  
Adhesive Layer ◽  
Vertical Surface ◽  
Cement Stone ◽  
Plastic Strength ◽  
Silica Alumina ◽  
Amorphous Aluminosilicate

Proved the possibility of using amorphous aluminosilicate as a modifying agent for the adhesive dry mixes. Are given the data on the microstructure and chemical composition of the amorphous aluminosilicates. Installed , that the microstructure of the synthetic additives is characterized by particles of round shape, dimensions 5,208-5,704 μm, Also there are particles of elongated shape in size 7.13-8.56 μm. Predominate chemical elements O, Si, Na, S, and Al in quantity 60.69%, 31.26%, 24.23%, 18.69% and 8.29% respectively. Described the character changes in the rheological properties of cement-sand mortar, depending on the percentage of additives. Determined, that the introduction in the cement-sand mortar the additive based on amorphous aluminosilicate leads to higher values of plastic strength. Are given the model of cement stone strength using synthetic additives in the formulation. The results of the evaluation of the frost resistance of cement-based tile adhesives with the use of amorphous aluminosilicates as a modifying additive are presented. In the article is determined the mark on frost resistance of tile glue and frost resistance of the contact zone of tile glue. The evaluation of the performance properties of the layer of tile adhesive on the basis of cement, dry mixes. The calculation of the value of displacement of the adhesive layer made on the basis of the developed recipes cement dry mixes applied to a vertical surface. Experimental data obtained values of displacement tiles relative to the substrate. Described the results of physical and mechanical properties of tile adhesive made on the basis of the developed adhesive dry mix formulations.

MOR/DEA/TEA mixed-template synthesis of CHA-type SAPO with different silica and alumina sources

2021 ◽  
Author(s):  
Marzieh Hamidzadeh ◽  
Mohadese Nazari ◽  
Maryam Rahimi Fard
Keyword(s):  
Sodium Silicate ◽  
Aluminum Hydroxide ◽  
Silicic Acid ◽  
Template Synthesis ◽  
Aluminum Phosphate ◽  
Silica Sol ◽  
Tetraethyl Orthosilicate ◽  
Aluminum Isopropoxide ◽  
Different Sources ◽  
Mixed Template

We investigated the effects of different sources of alumina (Pseudo-boehmite, Aluminum hydroxide, Aluminum tri-sec-butylate, Aluminum isopropoxide, and Aluminum phosphate) and silica (Silica sol, Silicic acid, Tetraethyl orthosilicate, and sodium silicate)...

Determination of Transition Stages of Structure Formation by Experimental Data

2020 ◽  
Vol 864 ◽  
pp. 53-58
Author(s):  
Vladimir Kersh ◽  
Andrey Kolesnikov ◽  
Nikolay Hlytsov ◽  
Aljona Foshch
Keyword(s):  
Experimental Data ◽  
Structure Formation ◽  
Coordinate Transformation ◽  
Setting Time ◽  
Geometric Interpretation ◽  
Heterogeneous Structure ◽  
Plastic Strength ◽  
Reasonable Choice ◽  
Stable Maintenance ◽  
Transition Stages

The paper describes the methodology of processing of the experimental data from the study of the hardening process of the binder paste, which allows to reveale information hidden in the results and objectively divide the period of structure formation into steps that differ in mechanisms and conditions. The proposed method has a universal character, is designed to study compositions of a heterogeneous structure and is implemented using experimental data on the plastic strength of gypsum binder paste as a simplified model of such a composition. It consists of two stages - the transition to normalized values and coordinate transformation to adequately display the observed processes of structure formation. To determine the type of the corresponding coordinate transformation, Erofeev and Kolmogorov equations were considered, which describe, in particular, crystallization processes. Based on the proposed equations, a physically reasonable choice of coordinate transformations of the re-logarithmic type was carried out. Processing the data on the plastic strength of the hardening gypsum binder paste as a model of the composition of an inhomogeneous structure allows us to identify the main stages of structure formation characterized by linear dependencies and transition stages in which qualitative transformations of the regime of change in plastic strength during hardening are observed. The separation of the total time of structure formation at the step is fixed on the graphs of changes in the corresponding properties, and the transition stages correspond to the points of change in the angular coefficients of the obtained dependencies. It is shown that the stationary step of structure formation corresponding to the stable maintenance of supersaturation is reflected in the general linear section on the graphs. It is shown that the time of occurrence of transition stages recorded during the measurement of plastic strength approximately corresponds to the setting time obtained by regulatory methods. A geometric interpretation of the angular coefficients of the obtained dependences which allows one to determine the structure of growing nuclei of a new phase was considered. The proposed technique can be applied to control the processes of structure formation of heterogeneous composition compositions.

scholarly journals Research of inter-phase interaction in ZOL-silicate paints

2018 ◽  
Vol 7 (4.5) ◽  
pp. 605 ◽  
Author(s):  
Loganina V.I ◽  
Mazhitov E.B
Keyword(s):  
Contact Angle ◽  
Tensile Strength ◽  
Silicic Acid ◽  
Liquid Glass ◽  
Phase Interaction ◽  
High Polymer ◽  
Properties Of Coatings ◽  
Interphase Interaction ◽  
Film Forming ◽  
Silicate Paints

It was suggested to use polysilicate solutions obtained by mixing liquid glass and silicic acid sol as a binder in the manufacture of sili- cate paints. Information is provided on the mechanism for increasing the operational properties of coatings based on sol silicate paint. It has been revealed that polysilicate solutions form membranes characterized by higher tensile strength due to an increase in the fraction of high-polymer fractions of silicic anions in the structure of the polysilicate binder in comparison with liquid glass. The results of a study on the interphase interaction between the pigment and the film-forming agent are given. It is shown that potassium polysilicate solutions form a smaller contact angle on the surface of the pigment (filler) and are characterized by greater work of wetting and adhesion to the filler (pigment).  

scholarly journals THE EFFECT OF LIQUID GLASS ON THE DEFORMATION OF REFRACTORY BINDER/SKYSTOJO STIKLO ĮTAKA KAITRAI ATSPARAUS RIŠIKLIO DEFORMACIJOMS

2001 ◽  
Vol 7 (1) ◽  
pp. 29-33
Author(s):  
Valentin Antonovič ◽  
Stasys Goberis
Keyword(s):  
High Temperature ◽  
Structure Formation ◽  
Liquid Glass ◽  
Structural Changes ◽  
Solid Phase ◽  
Refractory Materials ◽  
X Rays ◽  
Close Relationship ◽  
Ferrochrome Slag

The structure formation of a refractory binder of liquid glass, ferrochrome slag and dispersed chamotte has been studied. It has been found that there is a close relationship between the density of liquid glass used and sharp expansion of binder at the temperature of 500–600 °C: the lower the density, the lower the expansion of the material. To find the reason for this deformation of a binder, the specimens of dried out liquid glass (sodium hydro silicates) heating tests (Fig 1) and the specimens of dried out mixtures of liquid glass and some inert refractory materials (Table 2) dilatometric tests (Fig 2) have also been made. This investigation showed that sodium hydro silicates films bloated during heating. In order to determine structural changes under high temperature, X-rays investigation of refractory binder was made (Fig 5). This investigation showed that the reaction at the solid phase starts at the temperature over 600 °C and had no effect on the deformation of binder at 500–600 °C. It has been shown that the deformations occurring at 500–600 °C are caused by bloating of sodium hydro silicates (non-reacted liquid glass during hardening) films of the binder.

Structural Formation of the Cement Pastes Based on the Concrete Modified Dispersed Mineral Components

2020 ◽  
Vol 1011 ◽  
pp. 14-22
Author(s):  
A. Khalyushev ◽  
Sergey Stelmakh ◽  
Evgeniy Shcherban ◽  
A. Chernilnik
Keyword(s):  
Surface Modification ◽  
Electric Field ◽  
Structure Formation ◽  
High Voltage ◽  
Angle Of Repose ◽  
Cement Stone ◽  
Formation Processes ◽  
Cement Pastes ◽  
Structural Formation ◽  
Plastic Strength

With the increase in the number of finely dispersed mineral additives in concrete, their water demand increases and the effect of micro-filling weakens. To solve this problem, various methods of dry surface modification are proposed. As a result of the finely dispersed mineral powders’ surface modification, an improvement in their rheological characteristics, a decrease in wettability, a change in granulometry and other properties are achieved. This article discusses the surface modification effect’s laws in a high-voltage electric field on the autogenous properties of mineral dispersed concrete components, structure formation processes, mechanical properties, and cement stone hydration products. According to the results of the study, it was found that the surface modification of bulk materials - concrete components - in a high-voltage electric field changes autohesion properties in comparison with control samples. The data indicate lower values ​​of bulk density and angle of repose. This is due to a change in the balance of forces that arise during the mutual contact of particles after surface modification. With a certain balance of these forces, autohesion will contribute to the dense packing of particles and thereby affect the structure formation processes. The results of changes in the plastic strength of cement pastes confirm that there is an intensification of the structure formation process. Moreover, a more intense increase in plastic strength is observed during bipolar charging of particles in comparison with unipolar charging. This is due to an increase in the number of heterogeneous charges in the system and, as a consequence, an increase in the strength of adhesive contacts, as evidenced by the data of X-ray phase analysis.

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