Claw injuries of pigs due to inadequate floor surface conditions are a major concern in pig operations. Rough and slippery concrete floor surfaces can result in claw disorders. In this paper, the surface roughness and dynamic coefficient of friction (DCOF) of concrete floors used in two sow gestation rooms were studied. The first room had a slatted concrete floor with 105-mm wide slats and 19-mm wide gaps, and the second room had a floor with 125-mm wide slats and 25-mm wide gaps. A portable tester was designed and built to measure the surface roughness and friction of concrete floors. Measurements were conducted weekly during two gestation cycles for a total of 21 weeks. Based on the observations of sow activities, the floor in each room was virtually divided into four areas, namely dunging, high traffic, low traffic and sleeping areas. Surface roughness and friction were measured in the four areas in directions both parallel and perpendicular to the slats. The results showed that the length of time of floor usage by sows had a significant effect on the roughness and DCOF of concrete floors, with a sharp reduction in the DCOF after the first two weeks of use because manure stuck in the pores of the concrete surface reduced the interlocking between the asperities of the contact surfaces. No significant differences in the roughness and DCOF were found among different areas of floor (dunging, high traffic, low traffic and sleeping) or between the two floor configurations in the first 21 weeks of floor usage.

猪地板操作不当所致的爪伤是猪操作中的主要问题。粗糙而湿滑的混凝土地面会导致爪子不适。本文研究了在两个母猪妊娠室中使用的混凝土地面的表面粗糙度和动态摩擦系数（DCOF）。第一个房间的水泥板地板上有105毫米宽的板条和19毫米宽的缝隙，第二个房间的地板上有125毫米宽的板条和25毫米宽的缝隙。设计并制造了一种便携式测试仪，用于测量混凝土地面的表面粗糙度和摩擦力。在两个妊娠周期中每周进行一次测量，共21周。根据母猪活动的观察，每个房间的地板实际上分为四个区域，分别是粪便，高通行，低通行和睡眠区。在平行于和垂直于板条的方向上的四个区域中测量表面粗糙度和摩擦。结果表明，母猪使用地板的时间长度对混凝土地板的粗糙度和DCOF有显着影响，使用后两周，DCOF会急剧下降，因为粪便会粘在混凝土表面的孔中减少了接触面的凹凸之间的互锁。在地板使用的前21周内，地板的不同区域（粪便，高流量，低流量和就寝）之间或两个地板配置之间的粗糙度和DCOF均未发现显着差异。结果表明，母猪使用地板的时间长度对混凝土地板的粗糙度和DCOF有显着影响，使用后两周，DCOF会急剧下降，因为粪便会粘在混凝土表面的孔中减少了接触面的凹凸之间的互锁。在地板使用的前21周内，地板的不同区域（粪便，高流量，低流量和就寝）之间或两个地板配置之间的粗糙度和DCOF均未发现显着差异。结果表明，母猪使用地板的时间长度对混凝土地板的粗糙度和DCOF有显着影响，使用后两周，DCOF会急剧下降，因为粪便会粘在混凝土表面的孔中减少了接触面的凹凸之间的互锁。在地板使用的前21周内，地板的不同区域（粪便，高流量，低流量和就寝）之间或两个地板配置之间的粗糙度和DCOF均未发现显着差异。