evaluation of stress state of tile adhesive based on the

Evaluation of Stress State of Tile Adhesive Based on the Developed Dry Construction Mixture

Valentina Ivanovna Loganina1, Olga Victorovna Karpova1, Maksim Vasilevich Ariskin2,

Kristina Vladimirovna Zhegera1 1. Department of ‘Quality management and technology of building production’

‘Penza state university of architecture and constriction’ Russia, Penza, 440028, Street Titov, 28

2. Department of ‘Building construction’ ‘Penza state university of architecture and constriction’

Russia, Penza, 440028, Street Titov, 28 E-mail: [email protected], [email protected], [email protected]

Abstract: The article contains the calculation of the temperature distribution over the cross section of frame structures, the review of the state of stress of the adhesive layer, depending on thermal stresses arising in the walling for city Penza. It also contains the values of maximum tensile and compressive stresses along spread and thickness of the adhesive layer. It is found out that the adhesive layer with the use of synthesized alumosilicates in its formulation is resistant to fracture and exfoliation. Keywords: dry building mixes; modifying additives; synthesized alumosilicates; cement based dry adhesive mixture. 1. Introduction

To regulate the structure and properties of dry building mixes, modifying additives are added in their composition [1 – 4]. Previous studies have shown the efficacy of the use of synthesized alumosilicates in the lime and cement dry building mixes as a modifying additive [5 – 6].

The formulation of dry adhesive mixture based on cement is developed, which can be used as tile adhesive for coating of facades and interior walls of buildings with ceramic tiles. The formulation of dry adhesive mixes includes Portland cement M400, mineral aggregate with fraction ratio of 0,63-0,315:0,315-0,14 respectively 80:20 (%) and apparent density of 1538.2 kg/m3, plasticizer Kratasol, redispersible powder Neolith P 4400 and synthezed alumosilicates.

2 Experimental study

In the course of further studies, we evaluated the state of stress of the adhesive layer from the effects of temperature as a factor of destruction to assess the possibility of use of the developed tile adhesive in different climatic regions.

With that end in view, thermal technical calculation of the filler structure was carried out; its structural concept is shown in Fig. 1. The calculations were performed for the city Penza, located in the climatic region ӀӀ B and humidity zone 3 (dry) [7 – 9].

As the wall material of the filler structure we used ceramsite concrete with a density of ρ = 1600 kg/m3 and a thermal conductivity coefficient of λ = 0,58 W/(m·0C), as an insulating material – foam polystyrene with a density of ρ = 40kg/m3 and a thermal conductivity coefficient of λ = 0.038 W/(m·0C). Ceramic tile with a density of ρ = 2600 kg/m3 and thermal conductivity λ = 1,2W/(m·0C) was used. The tile adhesive under study has a thermal conductivity coefficient λ = 0,58 W/(m·0C).

The temperature distribution over the filler structure section was calculated. Taking into account the received temperature value thermal stresses arising in the adhesive layer with the thickness of 5 mm were calculated.

The calculation was carried out for the length of the adhesive layer (of tile adhesive) 102 mm. The design scheme is presented in Fig. 2. Calculations were performed using a universal program system of finite-element analysis Mechanical APDL (ANSYS).

The Second International Conference on Civil Engineering, Energy and Environment

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Figure 1 Structural concept of the filler structure: 1- ceramsite concrete; 2 – foam polystyrene; 3 – cement

based tile adhesive; 4 - ceramic tile

Figure 2 Scheme design

3. Results and discussions

Figure 3 shows the values of tensile stresses along the spread of the adhesive layer - σx (a) and the thickness of the adhesive layer - σz (b) during one year for the city of Penza.

It was found out that the maximum tensile stresses on the axis X (Fig.3, a) occur in the contact area of the adhesive layer with ceramsite concrete and in the contact zone of the adhesive layer with ceramic tile in March and are equal to σx = 1,68 MPa and σx = 1,24 MPa respectively.

Along the axis Z (Fig. 3, b) an adhesive layer maximum tensile and compressive stresses arise. Maximum tensile stresses occur in the center of the adhesive layer and in the marginal zone of the adhesive layer in September, and are equal to σz = 0,02 MPa and σz = 0,24 MPa respectively. Maximum compressive stress in the marginal contact zone of the adhesive layer thickness occurs in March and equals σz = - 0,49 MPa on the border with ceramic tiles.


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Figure 3 The change in stresses σx (a) and σz (b) in the adhesive layer during one year (Penza): 1 - on the border with ceramsite concrete (line OA Fig. 2.); 2 - on the border with ceramic tiles (line CB, Fig. 2.); 3 - the center of the adhesive layer (line OC, Fig. 2); 4 - the marginal zone of the adhesive layer (line AB, Fig.

2)

Analysis of the data presented in Figure 4 shows that maximum shearing stresses in the adhesive layer on the border with ceramsite concrete are observed in February and are equal to σxz = 0,11MPa, and in September on the border with ceramic tiles - σxz = 0,29MPa.

Figure 4 The change in shearing stresses σxz in the adhesive layer during one year in Penza: a - on the border with ceramsite concrete (Fig. 2, line OA); b - on the border with ceramic tiles (Fig. 2, line CB)

As can be seen from the data presented in Figure 5, maximum shearing stresses occur in the marginal zone (Fig. 2, line AB) in September and are equal to σxz = 0,29 MPa, and in the center of the adhesive joint (Fig. 2, line OC) they are observed in March and are equal to σxz = 0,00039 MPa.

Figure 5 The change in shearing stresses σxz in the adhesive layer during one year in Penza: a - marginal

zone (Fig. 2, line AB); b - the center of the adhesive layer (Fig. 2, line OC)


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4. Conclusions

The maximum stress values obtained were compared with the values of cohesion and adhesion resistance of cement based tile adhesives which are equal to Rkog = 2,2 MPa and Radg = 1,2 MPa respectively.

The presented results of the calculations allow to suggest that the adhesive layer with the use of synthezed alumosilicates in its formulation is resistant to fracture and exfoliation. 5. References [1] V.I. Loganina, L.V. Makarova, R.V. Tarasov and Ch.A. Sergeeva Increase water resistance decorative

coatings on the basis of calcareous dry building mixtures, Advanced Materials Research, Vol. 1078 (2015), 171-173. doi:10.4028/www.scientific.net/AMR.1078.171

[2] V.I. Loganina, L.V. Makarova, R.V. Tarasov and O.A. Davidova Limy finishing compositions with the use of additive based on sol of silicon acid, Applied Mechanics and Materials, Vol. 707 (2015), 81-84. doi:10.4028/www.scientific.net/AMM.707.81

[3] V.I. Loganina, L.V. Makarova, R.V. Tarasov and I.S. Pyshkina Influence of the mode of synthesis of the filler on structure and properties of limy dry construction mixes, Contemporary Engineering Sciences, Vol. 7, 2014, no 35, 1893-1897. http://dx.doi.org/10.12988/ces.2014.411210

[4] V.I. Loganina, L.V. Makarova, R.V. Tarasov and El.R. Akzhigitova Mineral additive based on the mixed-layer for dry construction mixes, Contemporary Engineering Scienes, Vol.7, 2014, no.28, 1547-1554.

[5] V.I.Loganina, A.D.Ryzhov Properties of limy composites with them addition alumosilicates, Contemporary Engineering Sciences, Vol. 8, 2015, no. 10, 409-413.

[6] V.I.Loganina, L.V.Makarova, R.V.Tarasov and K.V.Zhegera The composition cement binder with the use of the synthesized alumosilicates, Advanced Materials Research, Vol. 1022, 3-6.

[7] Building Regulations BR 131.13330.2012 Building climatology updated version BR 23-01-99*. М.: Rosstandart, 2012. 113с.

[8] G.I. Gorchakov, I.I. Lifanov, L.N. Terehin The coefficients of thermal expansion and thermal deformation of building materials, М.: Committee of Standards, Measures and Measuring Instruments under the USSR Council of Ministers, 1968. 167 p.

[9] K.F. Fokin, Ju.A. Tabunshikova, V.G. Gagarina Constructional thermal engineering parts of buildings, М.: АVОC, 2006. 256 p.


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evaluation of stress state of tile adhesive based on the

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