摩耗促進試験機の実在建築物床への適用性の検討

<p> Floor slip resistance is one of the important performances of floor for daily safety of building users. About floor slip resistance, an evaluation method based on Coefficient of Slip Resistance: C.S.R is established by Ono et al. Recently, C.S.R is widely used for designing or choosing floor material to building floor. However, this is based on measurement result by unused floor material. There are many floor materials which are easy to change slip resistance by influence of people walking abrasion. In order to secure safety of slip resistance after used in building floor, it is necessary to establish prediction method of changing slip resistance by walking abrasion.</p><p> In previous study, abrasion acceleration machine has been developed. This machine have abrasion piece with polishing cloth mounted on wheel, and abrasion is acceleration as the wheel rotate and the abrasion piece rubs floor surface. By laboratory experiment, it has been revealed that this machine can reproduce changing slip resistance of 40, 000 steps of simulated walking by wheel rotating 600 times for 30 minutes. However, relationships between abrasion burden at actual building floor and abrasion burden by the machine have not been investigated. Therefore, there is lack of data in order to predict life-time of floor material from a viewpoint of slip resistance.</p><p> In this study, applicability of abrasion acceleration machine for actual building floor was investigated. Method and procedure of research in this study is shown below.</p><p> 1) By measuring C.S.R for floor materials in actual building floors, changing slip resistance by daily using is grasped. And abrasion burden of the floor materials such as number of the building users is also grasped.</p><p> 2) Relationships between abrasion burden and changing slip resistance by the abrasion acceleration machine are grasped by using test specimen which is same floor materials as 1) and unused condition.</p><p> 3) Applicability of the abrasion acceleration machine for actual building floor is confirmed by comparing results of 1) and 2). And relationships between abrasion burden at actual building floors and by the machine are grasped.</p><p> We chose as research objects 3 floor materials: Floor-sign-sheet, resin convex attached floor, anti-slip coating floor. These satisfy all following conditions.</p><p> ･It has construction example at actual building floors. And number of days used and users a day can be grasped.</p><p> ･It is available of unused condition floor mat</p><p> ･It is easy to change slip resistance by walking abrasion.</p><p> Finally, following results are clarified in this study.</p><p> 1) In 3 floor materials, changing slip resistance in actual building floors have been roughly in agreement with changing slip resistance by abrasion acceleration test. In other words, the abrasion acceleration machine can apply for actual building floor with a high probability.</p><p> 2) Equivalent number of the machine rotations to 10,000 users walking was calculated and it was classified for each user behavior. As a result, areas where users stand for a short time and turn have significantly more abrasion burden than areas where users walk simply.</p>