Abstract The article outlines the methods, which has designated Young’s Modulus and Poisson’s Ratio of deformable cement adhesives. These indicators are necessary for the strength calculation of the lightweight floor systems (LFS), that do not require screeds with and without heating, using the finite element method. It was noticed that the diagrams of the dependence the stress on deformation in deformable cement adhesives are similar to the model of the ‘Madrid parabola’ used in testing concrete and cement mortar. In order to determine that the theory of ‘Madrid parabola’ is correct, calculations were performed using the least amount of squares approximation method. The data of the experimental studies combined with the formula calculations, allowed the study to achieve a reliable result, together to determine whether the theory of relative approximation is correct or not. All these actions have allowed determining the smallest deformations εc2 in deformable cement adhesives type C2S1 and C2S2 and their compressive strength. Thanks, these two methods (experimental and calculation) the functions describing deformable cement adhesives are defined. They were named S1 and S2 Evola and can be used by designers and producers of floor systems that do not require screeds.

中文翻译：

---

可变形水泥胶粘剂的杨氏模量和泊松比

摘要 本文概述了指定可变形水泥胶粘剂的杨氏模量和泊松比的方法。这些指标对于轻质地板系统 (LFS) 的强度计算是必要的，这些系统不需要使用有限元方法加热和不加热熨平板。注意到可变形水泥粘合剂中应力对变形的依赖关系图类似于用于测试混凝土和水泥砂浆的“马德里抛物线”模型。为了确定“马德里抛物线”理论的正确性，使用最小平方数近似法进行计算。实验研究的数据结合公式计算，使研究取得了可靠的结果，共同判断相对近似理论是否正确。所有这些操作都允许确定 C2S1 和 C2S2 型可变形水泥粘合剂的最小变形 εc2 及其抗压强度。谢谢，这两种方法（实验和计算）定义了描述可变形水泥粘合剂的函数。它们被命名为 S1 和 S2 Evola，可供不需要熨平板的地板系统的设计师和生产商使用。