The Influence of the Structure on the Destruction Mechanism of Polymer-Cement Plaster Coating
TL;DR: In this article, the influence of the structure of polymer-cement plaster coating on the nature of its destruction during the operation of the wall structure was considered, and it was shown that the use of purposefully selected components of the mixture (RPP, polymer fiber, cellulose ethers, fine aggregate with a low modulus of elasticity, etc.) made it possible to increase the uniformity of its structure and contact area with masonry, reduce the number of cracks during hardening, and slow down their development during operation, increase the durability of it and the wall.
Abstract: The article considers the influence of the structure of polymer-cement plaster coating on the nature of its destruction during the operation of the wall structure. It was shown that the use of purposefully selected components of the mixture (RPP, polymer fiber, cellulose ethers, fine aggregate with a low modulus of elasticity, etc.) made it possible to increase the uniformity of its structure and contact area with masonry, reduce the number of cracks during hardening, and slow down their development during operation, increase the durability of it and the wall structure. The durability of the wall structure largely depends on the number of defects in the plaster coating and the contact area between it and the masonry.
Citations
More filters
TL;DR: In this article , the bearing capacity and methods of calculating reinforced concrete beams on the shear without internal shear reinforcement were presented, which are strengthened with a composite FRCM system.
Abstract: This article presents research on the bearing capacity and methods of calculating reinforced concrete beams on the shear without internal shear reinforcement, which are strengthened with a composite FRCM system. The test samples were divided into two series: the first series—control, in which the variable parameter was the shear span (a/d = 2, a/d = 1.5, and a/d = 1); and the second series—reinforced by the FRCM system, without load, and strengthened at different load levels. The method of calculating experimental beams was tested according to the current code and data from the fib report. In this article, recommendations for determining the angle of inclined struts θ, the coefficient of the concrete shear strength CRd,c, and the coefficient of the load level at which strengthening is performed are proposed. The calculation with the these recommendations showed a good convergence of experimental and theoretical data in the 16–29% range, which is a much higher convergence than the calculation without these recommendations.
References
More filters
01 Mar 1984
343 citations
"The Influence of the Structure on t..." refers background in this paper
...The formation of microcracks and the development of macrocracks are also hindered by a fine aggregate with a low modulus of elasticity; it plays the role of a damper, relieving stresses in the material [11]....
[...]
TL;DR: In this article, the anthropologist Claude Levi-Strauss introduced the concept of bricolage in La Pensee Sauvage, and noted that the verb form, bricoler, was traditionally used with reference to some extraneous movement, as a kind of rebound or swerving; the bricoleur he wrote, is still someone who works with his hands and uses devious means compared to those of a craftsman.
Abstract: When the anthropologist Claude Levi-Strauss introduced the concept of bricolage in La Pensee Sauvage, he noted that the verb form, bricoler, was traditionally used “with reference to some extraneous movement,” as a kind of rebound or swerving; the bricoleur he wrote, “is still someone who works with his hands and uses devious means compared to those of a craftsman.”1 Though counterposed to a rigorous science that develops tools from raw materials, the “heterogeneous repertoire” of bricolage nevertheless can allow for “brilliant unforeseen results” and potentially new forms of knowledge. Recent art and critical activities have renewed interest in these “devious means,” in part as a way of revisiting the use-value of the readymade and, more pointedly, as a way of addressing a globalizing consumer culture.
56 citations
"The Influence of the Structure on t..." refers background in this paper
...The increase in crack resistance of a polymer-cement plaster mortar is due to an increase in the pull-out force (σσppff) of a polypropylene fiber from a polymer-cement matrix: σσppff = ττ dd ⁄ ∙ �(1− VVff) ∙ EEmm (EEff + Фff ∙ VVff) ⁄ � (12) With an increase in the tensile stress of the fiber (σσttff) and the polymer-cement matrix (σσppmm) [7], the ultimate tensile stresses in the polymer-cement plaster mortar increase:...
[...]
...Main material The introduction of RPP, a fine aggregate with a low modulus of elasticity, polymer fiber into the mixture made it possible to reduce the elastic modulus of the plaster coating (EEcc), increase its ductility coefficient (μμ) and deformability (DDmm) [7]....
[...]
01 Jan 1979
6 citations
2 citations