Research into the load bearing behaviour of light construction concrete slabs made by using Cross-Channel-Technology

CC 技术是一种生产木质结构几何形状板材的方法，在建筑产品中被称为管状刨花板或空心刨花板。 CC技术的名称来源于交叉通道技术，描述了板材中规则间隔的几何内部交叉通道。与具有相同厚度的实心板相比，这种系统化的空腔可以显着减轻重量。由于特殊的几何形状，生产是通过组装两半板来完成的。相交的接触面是由规则重复的半通道形成的，因此，可以通过将一个连接器（称为“驼峰”）的一个半部突出到下半部的匹配凹槽中来将两个半部彼此接合。将这种技术应用于生产混凝土板的想法具有巨大的潜力，例如这种方法可以用于生产由混凝土制成的轻质墙壁、天花板和立面元件。本研究的目的是对细混凝土（水泥和沙子，无砾石）CC 板作为普通建筑产品（如天花板和墙板）的承载能力进行系统研究。还可以引入 CC 板的分类，例如类似于 Ortlepp 为织物增强混凝土引入的术语，其中 L 代表“孔尺寸”，k_eff 是孔面积、截面对称性 (A_L) 和总面积 (A_b) 的比率的系数。主要重点转向使用细混凝土（例如 Pagel TF-10 TUDALIT）来生产厚度约为 8 厘米的外墙板（如果天花板和墙板厚度约为 20 厘米，则使用普通钢筋混凝土）。由于 CC 板的基本行为尚不清楚，因此应使用适当的轴承和故障模型来描述该过程。目前不存在关于基本结构行为的足够信息；因此数值模拟本身不足以代表复合材料中影响的复杂性。除了理论研究之外，还计划进行广泛的实验测试计划，通过研究小尺寸样本在静载荷下的行为来校准计算模型。在研究的实验部分中，应测试不同形状（例如，有或没有开口）和厚度的带或不带加固的不同 CC 板。最终的分析模型可以在组合载荷下对 CC 板进行独立的全尺寸测试后得到批准。

The CC-technology is an approach to producing structural geometric shaped plates made of wood, which in construction product are known as Tubular chipboard or Hollow Core Chipboard. The name of CC technology comes from cross-channel technology and describes the geometric inner cross channels at regular intervals in the plate. This systematic cavities lead to significant weight reduction when compared to solid plates having the same thickness. Because of especial geometry, the production is done by assembling the halves of plate. The intersecting contact surface is formed by regularly repeating half-channels, therefore , the two halves can be jointed to each other by projection of one connector, called the "humps" on one half into a matching groove on the next half. The Idea of transmission this technology to producing concrete panels has enormous potential for example this method can be implemented for production of light walls, ceiling and facade elements made of concrete. The aim of this research is the methodical study on the load carrying capacity of CC plates of fine concrete (cement and sand, no gravel) as normal construction product such as ceilings and wall panels. Also classification of the CC plate can be introduced, for example similar to the terms which are introduced by Ortlepp for textile-reinforced concrete, in which L stands for "hole dimension" k_eff is factor from the ratio of hole area, of the symmetry of section (A_L) and gross area (A_b). The main focus is turned to use of fine concrete (e.g. Pagel TF-10 TUDALIT) for the production facade panels of about 8 cm thickness (in case of ceiling and wall panels thickness of about 20 cm normal reinforced concrete is to be used). Since the basic behavior of CC plates is not known yet, the processes should be described with an appropriate bearing and failure model. Currently sufficient information for the basic structural behavior does not exist; therefore numerical simulation itself is not enough to represent the complexity of effects in the composite materials. In addition to theoretical studies, an extensive experimental test program is planned to calibrate the calculation models by investigating the behavior of small-scale specimens under static load. In experimental part of research different CC plates, with and without reinforcement with varying in shape (e.g. with and without openings) and thicknesses should be tested. The final analytical model could be approved after independent full-scale tests on CC plates under combination of loads.