\rSD-II<\/strong><\/span>電動(dòng)砂當(dāng)量試驗(yàn)儀<\/strong><\/span> <\/strong><\/span><\/span>\r<\/p>\r

\r電動(dòng)砂當(dāng)量試驗(yàn)儀簡(jiǎn)介：<\/strong><\/span> <\/span>\r<\/p>\r

\r  該儀器根據(jù)**行業(yè)標(biāo)準(zhǔn)（<\/strong><\/span>JTJ058-2000<\/strong><\/span>）中（<\/strong><\/span>T0334-1994<\/strong><\/span>）細(xì)集料砂當(dāng)量試驗(yàn)規(guī)程要求設(shè)計(jì)的產(chǎn)品<\/strong><\/span>,<\/strong><\/span>適用于瀝青混合料及水泥混凝土<\/strong><\/span>,<\/strong><\/span>用天然砂<\/strong><\/span>,<\/strong><\/span>人工砂<\/strong><\/span>,<\/strong><\/span>石屑<\/strong><\/span>,<\/strong><\/span>其集料最大粒徑不超過<\/strong><\/span>4.75mm,<\/strong><\/span>測(cè)定細(xì)集料中所含的粘性土或雜質(zhì)的含量<\/strong><\/span>,<\/strong><\/span>以評(píng)定集料的潔凈程度<\/strong><\/span>,<\/strong><\/span>砂當(dāng)量用<\/strong><\/span>SE<\/strong><\/span>表示。<\/strong><\/span>\r<\/p>\r

\r <\/strong><\/span>\r<\/p>\r

\r電動(dòng)砂當(dāng)量試驗(yàn)儀操作規(guī)程：<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●為不影響沉淀的過程，試驗(yàn)必須在無抖動(dòng)的水平臺(tái)上進(jìn)行。隨時(shí)檢查試驗(yàn)的沖洗管口，防止堵塞。試驗(yàn)過程中，沖洗液的溫度應(yīng)保持<\/strong><\/span>20<\/strong><\/span>±<\/strong><\/span>2<\/strong><\/span>℃范圍內(nèi)。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●用沖洗管將沖洗液吸入試筒，將干料倒入豎立的試筒中靜至<\/strong><\/span>10min<\/strong><\/span>，用橡膠塞堵住試筒，將試筒水平固定在振蕩器上。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●打開電動(dòng)砂當(dāng)量試驗(yàn)儀“總電源”開關(guān)，將儀器“振蕩時(shí)間設(shè)置”調(diào)節(jié)至<\/strong><\/span>30<\/strong><\/span>秒，按下“啟動(dòng)”鍵，電動(dòng)砂當(dāng)量試驗(yàn)儀震蕩<\/strong><\/span>30<\/strong><\/span>秒自動(dòng)停止。然后旋轉(zhuǎn)“啟動(dòng)”鍵振蕩器還原，取下試筒。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●將插管插入試筒中灌沖洗液直到<\/strong><\/span>380mm<\/strong><\/span>刻度線為止，靜至<\/strong><\/span>20min<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●測(cè)量：用鋼板尺在試筒外量測(cè)從試筒底部到絮凝物上液面的高度準(zhǔn)確至<\/strong><\/span>1mm<\/strong><\/span>，即<\/strong><\/span>h1<\/strong><\/span>。將配重活塞套筒在試筒口放好，直到碰到沉淀物時(shí)立即擰緊固定螺絲，將尺子插入套筒的開口處，是零點(diǎn)對(duì)準(zhǔn)活塞的底面。從套筒處讀取沉淀物的高度，準(zhǔn)確至<\/strong><\/span>1mm<\/strong><\/span>即<\/strong><\/span>h2<\/strong><\/span>。上述測(cè)量過程應(yīng)在<\/strong><\/span>30<\/strong><\/span>秒內(nèi)完成。<\/strong><\/span> <\/span>\r<\/p>\r

\r <\/strong><\/span>\r<\/p>\r

\r電動(dòng)砂當(dāng)量試驗(yàn)儀試驗(yàn)設(shè)備：<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●橡膠管（或塑料管）：長(zhǎng)約<\/strong><\/span>1.5mm<\/strong><\/span>，內(nèi)徑約<\/strong><\/span>5mm<\/strong><\/span>，與沖洗管、虹吸彎管聯(lián)在一起吸液用，本有金屬夾，以控制沖洗液流量。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●配重活塞同桿、底座、套筒、配重組成。桿長(zhǎng)<\/strong><\/span>430<\/strong><\/span>±<\/strong><\/span>0.25mm<\/strong><\/span>；底座直徑<\/strong><\/span>25<\/strong><\/span>±<\/strong><\/span>0.1mm<\/strong><\/span>，底面平坦光滑，垂直桿軸，橫向有三個(gè)螺絲可保持活塞在試筒中間有一點(diǎn)小縫隙。套筒有一個(gè)螺絲，能固定活塞下沉的位置，并有一個(gè)能靠尺子的深<\/strong><\/span>1cm<\/strong><\/span>、寬<\/strong><\/span>5mm<\/strong><\/span>的缺口，用于測(cè)量讀數(shù)。固定在活塞桿頂端的配重，除筒套外總重<\/strong><\/span>1kg<\/strong><\/span>±<\/strong><\/span>5g<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●振蕩器：使試筒產(chǎn)生橫向直線運(yùn)動(dòng)。振幅：<\/strong><\/span>20.3<\/strong><\/span>±<\/strong><\/span>1.0cm,<\/strong><\/span>運(yùn)動(dòng)周期<\/strong><\/span>180<\/strong><\/span>±<\/strong><\/span>2<\/strong><\/span>次<\/strong><\/span>/min<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●圓柱形試筒：透明塑料制內(nèi)徑<\/strong><\/span>32<\/strong><\/span>±<\/strong><\/span>0.025mm<\/strong><\/span>，高度<\/strong><\/span>420<\/strong><\/span>±<\/strong><\/span>0.25mm<\/strong><\/span>。人試筒底部起到<\/strong><\/span>100<\/strong><\/span>±<\/strong><\/span>0.25mm<\/strong><\/span>、<\/strong><\/span>380<\/strong><\/span>±<\/strong><\/span>0.25mm<\/strong><\/span>處刻劃標(biāo)記線，配有橡膠塞。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●沖洗管：同一根硬管組成，不銹鋼或冷鍛銅制其外徑為<\/strong><\/span>6<\/strong><\/span>±<\/strong><\/span>0.5mm<\/strong><\/span>，內(nèi)徑為<\/strong><\/span>4<\/strong><\/span>±<\/strong><\/span>0.2mm<\/strong><\/span>，管的下部有一個(gè)不銹鋼兩側(cè)帶孔尖頭，孔徑為<\/strong><\/span>1<\/strong><\/span>±<\/strong><\/span>0.1mm<\/strong><\/span>。<\/strong><\/span>\r<\/p>\r

\r  ●塑料桶（<\/strong><\/span>5<\/strong><\/span>升）：桶口配有插虹吸彎管的橡膠塞。桶底面高出工作臺(tái)約<\/strong><\/span>1.5mm<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●虹吸彎管和進(jìn)氣彎管；將其插入桶口橡膠塞。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●天平：稱量<\/strong><\/span>1kg,<\/strong><\/span>感量<\/strong><\/span>1g<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●烘箱：能使溫度控制在<\/strong><\/span>105<\/strong><\/span>±<\/strong><\/span>5<\/strong><\/span>℃。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●廣口漏斗（塑料制）：口的直徑<\/strong><\/span>100mm<\/strong><\/span>左右。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●一把長(zhǎng)<\/strong><\/span>500mm<\/strong><\/span>的鋼板尺，刻度**到<\/strong><\/span>1mm<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●一個(gè)篩孔<\/strong><\/span>4.75mm<\/strong><\/span>（圓孔為<\/strong><\/span>5mm<\/strong><\/span>）和篩底。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●一個(gè)**和一把勺子。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●溫度計(jì)。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●其它：一升量筒、<\/strong><\/span>2<\/strong><\/span>升燒杯、刷子、盤子、小鋁盒等。<\/strong><\/span> <\/span>\r<\/p>\r

\r <\/strong><\/span>\r<\/p>\r

\r電動(dòng)砂當(dāng)量試驗(yàn)儀砂當(dāng)量值按下式計(jì)算：<\/strong><\/span> <\/span>\r<\/p>\r

\r  <\/strong><\/span>SE=h2/h1<\/strong><\/span>×<\/strong><\/span>100 <\/strong><\/span>\r<\/p>\r

\r  式中<\/strong><\/span>:SE<\/strong><\/span>為試樣用活塞測(cè)定砂當(dāng)量值<\/strong><\/span>; <\/strong><\/span>\r<\/p>\r

\r  <\/strong><\/span>h1<\/strong><\/span>為試筒中絮凝物和沉淀物的總高度<\/strong><\/span>,mm; <\/strong><\/span>\r<\/p>\r

\r  <\/strong><\/span>h2<\/strong><\/span>為試筒中用目測(cè)定沉淀物的高度<\/strong><\/span>,mm<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  電動(dòng)砂當(dāng)量試驗(yàn)儀注意事項(xiàng)：<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●試驗(yàn)完畢后<\/strong><\/span>,<\/strong><\/span>須將活塞擦洗干凈。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●避免圓形試筒磕碰。<\/strong><\/span> <\/span>\r<\/p>\r

\r●定期向振蕩器滑動(dòng)桿上注潤(rùn)滑油。<\/strong><\/span> <\/span>\r<\/p>\r

\r <\/strong><\/span>\r<\/p>\r

\r電動(dòng)砂當(dāng)量試驗(yàn)儀參數(shù)：<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●額定功率：<\/strong><\/span>90W<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●總重：<\/strong><\/span>45<\/strong><\/span>±<\/strong><\/span>1kg<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●外形尺寸：<\/strong><\/span>564<\/strong><\/span>×<\/strong><\/span>320<\/strong><\/span>×<\/strong><\/span>360<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●試筒振福：<\/strong><\/span>20.3<\/strong><\/span>±<\/strong><\/span>1.cm<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●運(yùn)動(dòng)周期：<\/strong><\/span>180<\/strong><\/span>次<\/strong><\/span>/min<\/strong><\/span>±<\/strong><\/span>2<\/strong><\/span>次<\/strong><\/span>/min<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●配重活塞：<\/strong><\/span>1kg<\/strong><\/span>±<\/strong><\/span>5g<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●塑料試筒：內(nèi)徑<\/strong><\/span>32mm<\/strong><\/span>±<\/strong><\/span>0.25mm <\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●高度：<\/strong><\/span>420mm<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●沖洗管外徑<\/strong><\/span>6mm<\/strong><\/span>±<\/strong><\/span>0.5mm <\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r  ●內(nèi)徑：<\/strong><\/span>4mm<\/strong><\/span>±<\/strong><\/span>0.2mm<\/strong><\/span>。<\/strong><\/span> <\/span>\r<\/p>\r

\r <\/strong><\/span>\r<\/p>