Strength and Deformability of Stone Masonry Made of Cellular Concrete Blocks of Autoclaved Hardening with Polyurethane Joints. Part 1. Strength and Deformability under Compression

Results of the experimental study of stone masonry samples made of cellular concrete blocks with thin-layer polyurethane joints under compression are presented. On the basis of the experimental study, the peculiarities of deformation and destruction of experimental samples have been revealed; values of the stone masonry strength under compression and its deformation characteristics have been obtained. The comparison of results obtained with results of the experimental study of stone masonry made of cellular concrete blocks with thin- layer polymer-cement joints has been made. It is shown that the nature of deformation of masonry samples on the polymer-cement adhesive solution and on the glue-foam is different. The modulus of deformations of the stone masonry on the glue-foam increases with increasing compressive stresses that is explained by high ductility of horizontal polyurethane joints at the initial stages of loading of experimental samples. In the process of compression of polyurethane joints, their deformability is reduced, but until the stresses close to the compres- sive strength of the masonry, it remains higher than the deformability of polymer-cement glue joints. It is established that the value of the secant elastic modulus of the stone masonry with thin-layer polymer-cement joints exceeds the elasticity modulus of the masonry on the glue-foam by 3.3 times

V.N. DERKACH, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Branch of Republican Unitary Enterprise «Institute BelNIIS», «Scientific-Technical Center» (267/2, Moskovskaya Street, Brest, 224023, Republic of Belarus)

1. Glumov A. Laying on polyurethane structures: how to elimi- nate cold bridges. Stroitelnyye materialy, oborudovaniye i tekhnologii XXI veka. 2014. No. 4, pp. 30–31. (In Russian). 
2. Derkach V.N., Orlovich R.B. Crack growth resistanceof masonry walls. Zhilishnoe Stroitelstvo [Housing construction]. 2012. No. 8, pp. 34–37. (In Russian). 
3. Jäger A., Kuhlemann C., Habian E., Kasa M., Lu S. Verklebung von Planziegelmauerwerk mit Polyure- thanklebern. Mauerwerk. 2011. No. 15, pp. 223–231. 
4. Aldoghaim Ye. Untersuchungen zur Verbesserung der mech- anischen Eigenschaften von Mauerwerk durch Elastomerlager. Mauerwerk. 2012. No. 16, pp. 93–102. (In German). 
5. Eurocode 6: Bemessung und Konstruktion von Mauerwerksbauten. Teil 1-1: Allgemeine Regeln für bewehrtes und unbewehrtes Mauerwerk: EN 1996-1-1:2005. Berlin: Deutsches Institut für Normung. 2005. 127 p. 
6. Drobiec R. Wplyw rodzaja zaprawy na parametry me- chaniczne murow z ABK poddanych sciskaniu. Materialy Budowlane. 2015. No. 4, pp. 3–7. (In Polish). 
7. Grinfeld G.I., Kharchenko A.P. Comparative tests of ma- sonry made of autoclaved aerated concrete with different masonry seam execution. Zhilishnoe Stroitelstvo [Housing construction]. 2013. No. 11, pp. 30–34. (In Russian). 
8. Gorshkov A.S., Vatin N.I. Properties of wall construc- tions from cellular concrete products of autoclave hard- ening on polyurethane glue. Inzhenerno-stroitelnyy zhur- nal. 2013. No. 5, pp. 5–19. (In Russian).