電動砂當(dang)量(liang)試驗儀，

額定功(gong)率:180W

自控定時:30S/次 外(wai)形尺寸:560×320×360

配(pei)重活(huo)塞:1kg±5g

圓柱形(xing)塑(su)料試筒(tong):

內徑:32mm±0.25mm 高度:420mm±0.25mm

沖洗管(guan)外徑:6mm±0.25mm 內徑:4mm±0.2mm

試驗步驟 

1,試(shi)驗(yan) 為了不影響沉(chen)淀的過程,試(shi)驗(yan)必須在無擾動的水平(ping)臺上進行(xing).隨時檢(jian)查(cha)試(shi)驗(yan)的沖洗(xi)管口,防(fang)止堵(du)塞.試(shi)驗(yan)過程中(zhong),沖洗(xi)液(ye)的溫度應(ying)保(bao)持20±2℃范圍內.由于(yu)塑料在太(tai)(tai)陽下容易變(bian)成不透明,應(ying)盡量避免將塑料器皿直(zhi)接(jie)暴露(lu)在太(tai)(tai)陽下.盛試(shi)驗(yan)溶液(ye)的塑料器皿用畢要清洗(xi)干凈.

(1)用(yong)沖洗(xi)管將沖洗(xi)液(ye)吸入試(shi)筒直到(dao)100mm刻度(du)(約80毫升).

(2)把相當于120±1g干料重的濕樣用漏斗(dou)倒入(ru)豎立試(shi)筒(tong)中.

(3)反復敲打試筒下部,以除去氣泡使試樣濕(shi)潤,靜置10min.

(4)試(shi)樣靜(jing)置10±1min結束后,用橡膠(jiao)塞堵(du)住(zhu)試(shi)筒(tong),將試(shi)筒(tong)水平固(gu)定(ding)在(zai)振(zhen)蕩器上.(注意試(shi)筒(tong)底部方頭(tou)碰螺(luo)絲.)

(5)開動振蕩(dang)器(qi),在30±1S的時間內振蕩(dang)90次.用人工振蕩(dang)時,要用手(shou)將(jiang)試(shi)(shi)筒(tong)橫向(xiang)水平放置(zhi),僅(jin)需手(shou)腕(wan)振蕩(dang),不必晃(huang)動手(shou)臂,振幅(fu)為(wei)203±25mm,振蕩(dang)時間和(he)次數(shu)與振蕩(dang)器(qi)相同.然后將(jiang)試(shi)(shi)筒(tong)取(qu)下,豎直放回試(shi)(shi)驗(yan)臺上,擰下橡(xiang)膠塞(sai).

(6)將沖(chong)洗管插(cha)入試筒(tong)(tong)中(zhong),用(yong)沖(chong)洗液(ye)迅(xun)速沖(chong)洗附在(zai)試筒(tong)(tong)壁(bi)上的(de)集料(liao),然(ran)后(hou)將沖(chong)洗管插(cha)到試筒(tong)(tong)底部,慢(man)慢(man)轉動沖(chong)洗管,同時勻速緩慢(man)提高沖(chong)洗管,使附著在(zai)集料(liao)表面的(de)細(xi)粒雜質浮上來(lai),直至溶液(ye)達到380mm刻度線為止.

(7)緩慢(man)勻速(su)向(xiang)想拔出沖洗(xi)管,當液面(mian)位于380mm刻(ke)(ke)度(du)線時,切斷沖洗(xi)管的液流,使液面(mian)保(bao)持380mm刻(ke)(ke)度(du)線,然后在(zai)沒有擾(rao)動的情況下靜置(zhi)20min±15S.

注意事(shi)項 

1,試驗完畢后,須將活塞(sai)擦洗干凈.

2,避(bi)免圓形試筒磕碰(peng).

3,定期向(xiang)振(zhen)蕩器滑動(dong)桿上(shang)注潤滑油

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