JJF(赣) 036-2024 水泥净浆流动度测定仪校准规范

江西省地方计量技术规范JJF(赣05-13发布2024-08-12实施JJF(赣)036—2024本规范经江西省市场监督管理局于2024年05月13日批准，并自2024年05月12日起施行。I引言„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„(II)1范围„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„(1)2引用文件„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„„(1)3概述„„„„„„„„„„„„„„„„„„„„„„‥„„„„„„„„„„(1)4计量特性„„„„„„„„„„„„„„„„‥„„„„„„„„„„„„„„(2)5校准条件„„„„„„„„„„„„„„„„„„„„‥„„„„„„„„„„(2)6校准项目和校准方法„„„„„„„„„„„„„„„„„„„„„„„„„„(3)7校准结果的表达„„„„„„„„„„„„„„„„„„„„„„„„„„„„(3)8复校时间间隔„„„„„„„„„„„„„„„„„„„„„‥„„„„„„„(4)附录A纯水密度值表„„„„„„„„„„„„„„„„‥„„„„„„„„„(5)附录B校准证书内页信息及格式„„„„„„„„„„„„„„„„‥„„„„(6)附录C校准证书内页格式示例„„„„„„„„„„„„„„„„„„„„„„(8)附录D测量不确定度评定示例„„„„„„„„„„„„„„„„„„„„„„(10)1本规范适用于流出时间小于35s的水泥净浆流动度测定仪的校准。2引用文件JJG196—2006常用玻璃量器检定规程JTG3420—2020公路工程水泥及水泥混凝土试验规程第T508—2005:水泥浆体流动度试验方法JJF1059.1—2012测量不确定度评定与表示凡是注日期的引用文件，仅注日期的版本适用于本规范；凡是不注日期的引用文件，其最新版本(包括所有修订单)适用于本规范。水泥净浆流动度测定仪是通过容量测量，根据一定量的体积和流出时间，来确定各类水泥净浆体流动度的专门仪器。依据JTG3420—2020《公路工程水泥及水泥混凝土试验规程》中(T508—2005水泥浆体流动度试验方法)要求，开发的测量各类水泥如硅酸盐水泥、普通硅酸盐水泥、矿渣硅酸盐水泥、粉煤灰硅酸盐水泥、火山灰硅酸盐水泥、复合硅酸盐水泥，道路硅酸盐水泥及其它浆体流动度的专用仪器。包括支架、流动度测定仪本体(见图1a与图1b),示意图(见图2)。本规范中使用的计量术语和计量单位和JF1001—2011《通用计量术语及定义》一24.1流动锥体的体积1725mL±5mL;4.2锥体内水流出的时间为8.0s±0.2s;4.3测定仪上口内径178mm±0.4mm,锥体下口内径13mm±0.1mm;4.4锥体部分高度192mm±1mm,阀门部分长度38mm±1mm,上口高度不小于75mm。直径13±0.15校准条件5.1环境要求5.1.2环境温度：(20±10)℃;相对湿度≤85%。5.1.2检定介质为纯水。5.2校准设备5.2.1电子天平：测量范围(0~3)kg,检定分度值为0.1g;3度测定仪上口的螺丝，其针尖与锥体上口平齐。关闭阀门，缓慢加入水，使水平面与上口平齐，称量剩余水质量m2。锥体部分体积按公式（1）计算，重复测3次，V=(m1-m2)/ρwm1——电子天平称取1730mL水质量，g；ρw值见附录A4567JJF（赣）××××—2022《水泥净浆流动度测温度%123校准员：核验员：8证书编号××××-××××℃9证书编号××××-××××123锥体部分流出时间(8.0±0.2)s4测定仪上口内径(178±0.4)mm5锥体下口内径(13±0.1)mm6锥体部分高度(192±1)mm7阀门部分长度(38±1)mm8水泥净浆流动度测定仪主要被校准参数为锥体的体积，锥体内水流出时间以及测定D.2.1.1测量模型采用直接称量法进行测量，其测量模型为公V=(m1-m2)/ρwm1——电子天平称取1730mL水质量，g；D.2.1.2.1标准器引入的不确定度u1根据测量方法，体积由质量比密度，密度为常数，质量引入不确定度为电子天平引k31D.2.1.2.2测量重复性引入的不确定度u2s=0.53mLD.3 n3ucuu0.05720.312=0.32mLD.5取k2，则扩展不确定度按公式（D.6）计算。体积Ukuc=2×0.32=0.7mLD.6D.2.2.1测量模型采用直接测量法进行测量，其测量模型为公i电子秒表测量过程引入的不确定度包括估读引入的不确定度、测量重复性引入的不 D.2.2.2.1本院电子秒表分度值为0.01s，取k3，按公式（D.8）计算。 3u110.01=0.0058sD.8 3D2.2.2.3重复性与启停相对比，比较小ucu1u20.005820.0292=0.03sD.10取k2，则扩展不确定度按公式（D.11）计算。时间Ukuc20.03=0.06sD.11D.2.3.1测量模型采用直接测量法进行测量，其测量模型为公式iD.2.3.2.1高度卡尺示值误差引入的不确定度分量u1均匀分布，取k，按公式（D.13）计算。k3u1MPEV0.03=0.017mmk3D.2.3.2.2测量重复性引入的不确定度分量u2 n3u2s0.11 n3ucuu0.01720.0642=0.067mmD.16取k2则扩展不确定度按公式（D.17）计算。Ukuc20.067=0.13mmD.17D.2.3.3.1游标卡尺示值误差引入的不确定度分量u1mm内，最大允许误差为±0.03mm，取±0.03mm计算，认为符合均匀分布，取k，u1MPEV0.03=0.017mmk3u1MPEV0.03=0.017mms=0.034mmD.19 n3u2s0.034=0.020mm