mso-hansi-font-family:"Times New Roman"">一、概述：

SD-1手動砂當量試驗儀是嚴格按照JTJ058-2000公路規(guī)程設(shè)計的產(chǎn)品。在使用本儀器前務(wù)必請按如下內(nèi)容檢查是否包裝完好、項目齊全。如有欠缺，為維護您的權(quán)益請立即告知我們，本廠會及時為您提供服務(wù)。

mso-hansi-font-family:"Times New Roman"">二、手動砂當量試驗儀產(chǎn)品技術(shù)參數(shù)：

mso-hansi-font-family:"Times New Roman"">配重活塞：1KG "Times New Roman"">±5g

mso-hansi-font-family:"Times New Roman"">塑料試筒：內(nèi)徑32mm "Times New Roman"">±0.25mm? 高度420mm

mso-hansi-font-family:"Times New Roman"">沖洗管：內(nèi)外6mm "Times New Roman"">±0.5mm????? 內(nèi)徑4mm mso-hansi-font-family:"Times New Roman"">±0.2mm

mso-hansi-font-family:"Times New Roman"">三、手動砂當量試驗儀附件箱清單：

1、試筒????? 1 "Times New Roman"">套

2、配夾橡膠? 1 "Times New Roman"">只

3、試劑????? 2 "Times New Roman"">瓶

4、沖洗管??? 1 "Times New Roman"">支

5、配重活塞? 1 "Times New Roman"">套

6、虹吸管??? 1 "Times New Roman"">支

7、說明書??? 1 "Times New Roman"">本

8、合格證??? 1 "Times New Roman"">份

mso-hansi-font-family:"Times New Roman"">四、手動砂當量試驗儀高濃度氯化鈣溶液的配制：

mso-hansi-font-family:"Times New Roman"">按無水氯化鈣（g) "Times New Roman"">；蒸流水體積（ml)=1:2 "Times New Roman"">進行配制。氯化鈣溶于水時放熱，溶液溫度升高，待溶液冷卻到室溫后用濾紙進行過濾，以除去不溶雜質(zhì)。過濾后的高濃度溶液存放備用，該溶液中氯化鈣含量410g/L mso-hansi-font-family:"Times New Roman"">。

1、濃溶液（1L) mso-hansi-font-family:"Times New Roman"">的配制

mso-hansi-font-family:"Times New Roman"">（1 "Times New Roman"">）用量筒量取272ml "Times New Roman"">高濃度氯化鈣溶液；

mso-hansi-font-family:"Times New Roman"">（2) "Times New Roman"">用天平稱取484.8g "Times New Roman"">丙三醇；

mso-hansi-font-family:"Times New Roman"">（3 "Times New Roman"">）用天平稱取13.6g "Times New Roman"">甲醛；

mso-hansi-font-family:"Times New Roman"">（4 "Times New Roman"">）將上述三種試劑轉(zhuǎn)入1L "Times New Roman"">量筒中。轉(zhuǎn)入時要用少量蒸餾水，分別對盛

mso-hansi-font-family:"Times New Roman"">（5 "Times New Roman"">）將1L配畢的溶液倒入2L mso-hansi-font-family:"Times New Roman"">的燒杯或量筒中，混合均勻，裝入。

2、制備沖洗液

mso-hansi-font-family:"Times New Roman"">取試驗用的濃溶液62.5ml "Times New Roman"">±0.5ml，裝入5L mso-hansi-font-family:"Times New Roman"">塑料筒或瓶中，用蒸餾水稀釋至2.5 "Times New Roman"">±0.005L "Times New Roman"">。

mso-hansi-font-family:"Times New Roman"">五、手動砂當量試驗儀試驗方法：

1、目的與適用范圍

mso-hansi-font-family:"Times New Roman"">（1 "Times New Roman"">）本方法適用于測定細集料中所含粘性土或雜志的含量，以評定集料的潔凈程度，用SE mso-hansi-font-family:"Times New Roman"">表示。

mso-hansi-font-family:"Times New Roman"">（2 "Times New Roman"">）本方法適用于瀝青混合料及水泥混凝土用天然砂、人工砂、石屑，其集料最大粒徑不得超過4.75mm mso-hansi-font-family:"Times New Roman"">（圓孔篩5mm "Times New Roman"">）

2、儀器與試件

mso-hansi-font-family:"Times New Roman"">本試驗需要下列儀器和設(shè)備

mso-hansi-font-family:"Times New Roman"">（1 "Times New Roman"">）圓柱形試筒：透明塑料制內(nèi)徑32 "Times New Roman"">±0.025mm, "Times New Roman"">高度420±0.25mm mso-hansi-font-family:"Times New Roman"">。試筒底部起到100 "Times New Roman"">±0.25mm "Times New Roman"">、380±0.25mm mso-hansi-font-family:"Times New Roman"">處刻劃標記線，配有橡膠塞。

mso-hansi-font-family:"Times New Roman"">（2 "Times New Roman"">）沖洗管：由一根硬管組成，不銹鋼或冷鍛銅制其外徑為6 "Times New Roman"">±0.5mm，內(nèi)徑為4 mso-hansi-font-family:"Times New Roman"">±0.2mm, "Times New Roman"">管的下部有一個不銹鋼兩側(cè) 帶孔尖頭，孔徑為1 mso-hansi-font-family:"Times New Roman"">±0.1mm "Times New Roman"">。

mso-hansi-font-family:"Times New Roman"">（3 "Times New Roman"">）塑料筒（5升）：桶口配有插虹彎管的橡膠塞。桶底面高出工作臺約1.5m

mso-hansi-font-family:"Times New Roman"">（4 "Times New Roman"">）虹吸彎管和進氣彎管：將其插入桶口橡膠塞。

mso-hansi-font-family:"Times New Roman"">（5 "Times New Roman"">）橡膠管（或塑料管）：長約1.5m "Times New Roman"">，內(nèi)徑約5mm "Times New Roman"">，與沖洗管、虹吸彎管聯(lián)在一起吸液用，配有金屬夾，以控制沖洗液流量。

mso-hansi-font-family:"Times New Roman"">（6 "Times New Roman"">）配重活塞由桿、底座、套筒、配重組成。桿長430 "Times New Roman"">±0.25mm "Times New Roman"">；底座直徑25 "Times New Roman"">±0.1mm，底面平坦光滑，垂直桿軸，橫向有三個螺絲可保持活塞在試筒中間有一點小縫隙。套筒有一個螺絲，能固定活塞下沉的位置，并有一個能靠尺子的深1cm mso-hansi-font-family:"Times New Roman"">、寬5mm "Times New Roman"">的缺口，用于測量讀數(shù)。固定在活塞桿頂端的配重，除筒套外總重1kg "Times New Roman"">±5g.

mso-hansi-font-family:"Times New Roman"">（7 "Times New Roman"">）手動振蕩：使試筒產(chǎn)生橫向直線往復運動。振幅：20.3 "Times New Roman"">±1.0cm，運動周期180 mso-hansi-font-family:"Times New Roman"">±2 "Times New Roman"">次/min

mso-hansi-font-family:"Times New Roman"">（8 "Times New Roman"">）天平:稱量1kg. mso-hansi-font-family:"Times New Roman"">感量1g

mso-hansi-font-family:"Times New Roman"">（9 "Times New Roman"">）烘箱：能使溫度控制在105 "Times New Roman"">±5℃

mso-hansi-font-family:"Times New Roman"">（10 "Times New Roman"">）廣口漏斗（塑料制）：口的直徑100mm "Times New Roman"">左右

mso-hansi-font-family:"Times New Roman"">（11 "Times New Roman"">）一把長500mm "Times New Roman"">的鋼板尺，刻度精確到1mm

mso-hansi-font-family:"Times New Roman"">（12) "Times New Roman"">一個篩孔4.75mm "Times New Roman"">（圓孔為5mm) "Times New Roman"">和篩底。

mso-hansi-font-family:"Times New Roman"">（13 "Times New Roman"">）一個刮刀和一把勺子。

mso-hansi-font-family:"Times New Roman"">（14 "Times New Roman"">）溫度計。

mso-hansi-font-family:"Times New Roman"">（15 "Times New Roman"">）其他：一升量筒、2 "Times New Roman"">個燒杯、刷子、盤子、小鋁盒等

3、試驗步驟：

mso-hansi-font-family:"Times New Roman"">為了不影響沉淀的過程，試驗必須在無抖動的水平臺上進行，隨時檢查試驗的沖洗管口，防止堵塞。

mso-hansi-font-family:"Times New Roman"">試驗過程中，沖洗液的溫度應(yīng)保持20 mso-hansi-font-family:"Times New Roman"">±2 "Times New Roman"">℃范圍內(nèi)。

mso-hansi-font-family:"Times New Roman"">由于塑料在太陽光下容易變成不透明，應(yīng)盡量避免將塑料器皿直徑暴露在太陽光下。盛試驗溶液的塑料器皿用完后要清洗干凈。

mso-hansi-font-family:"Times New Roman"">（1 "Times New Roman"">）用沖洗管將沖洗液吸入試筒直到100mm "Times New Roman"">刻度---（約需80ml mso-hansi-font-family:"Times New Roman"">）。

mso-hansi-font-family:"Times New Roman"">（2 "Times New Roman"">）把相當于120 "Times New Roman"">±1g干料重的試樣用漏斗仔細地倒入豎立的試筒中。

mso-hansi-font-family:"Times New Roman"">（3 "Times New Roman"">）用手掌反復敲打筒下部，以除去氣泡，使試樣盡快潤濕，然后靜置10min.

mso-hansi-font-family:"Times New Roman"">（4 "Times New Roman"">）在試樣靜置10 "Times New Roman"">±1min結(jié)束后，用橡膠塞堵住試筒。

mso-hansi-font-family:"Times New Roman"">（5 "Times New Roman"">）手動振蕩：使試筒產(chǎn)生橫向直線往復運動。振幅;20.3 "Times New Roman"">±1.0cm，運動周期180 mso-hansi-font-family:"Times New Roman"">±2 "Times New Roman"">次/min.振蕩擰下橡膠完成塞。

mso-hansi-font-family:"Times New Roman"">（6 "Times New Roman"">）將沖洗管插入試筒中，用沖洗液迅速沖洗附在試筒壁上的集料然后將沖洗管插到試筒底部，慢慢轉(zhuǎn)動沖洗管，同時勻速緩緩提高沖洗管，使附著在集料表面的細粒雜質(zhì)浮上來，直到溶液達到380mm mso-hansi-font-family:"Times New Roman"">刻度線為止。

mso-hansi-font-family:"Times New Roman"">（7 "Times New Roman"">）緩慢勻速向上拔出沖洗管，當液面位于380mm "Times New Roman"">刻度是，切斷沖洗管的液流，使液面保持380mm "Times New Roman"">刻度線，在沒有擾動的情況下靜置20min "Times New Roman"">±15S。

mso-hansi-font-family:"Times New Roman"">測量：

mso-hansi-font-family:"Times New Roman"">（1 "Times New Roman"">）靜置20分鐘后，用鋼板尺在試筒外測量從試筒底部到絮凝物上液面的高度，即h1 mso-hansi-font-family:"Times New Roman"">（如有可能，同時測得從試筒底部到沉淀物上液面的高度，即h2, mso-hansi-font-family:"Times New Roman"">此項作為與活塞測量的砂當量值的參考值），準確到1mm mso-hansi-font-family:"Times New Roman"">。

mso-hansi-font-family:"Times New Roman"">（2 "Times New Roman"">）將配重活塞套筒在試筒口放好，使配重活塞徐徐落入試筒，直至碰到沉淀物時，立即擰緊固定螺絲，將尺子插入套筒的開口處，使零點對準的底面。從套筒處讀取沉淀物高度，即h2, mso-hansi-font-family:"Times New Roman"">準確至1mm "Times New Roman"">。上述測量過程應(yīng)在30 "Times New Roman"">秒內(nèi)完成。同時記錄試筒內(nèi)的溫度，準確至1 "Times New Roman"">℃。

mso-hansi-font-family:"Times New Roman"">以上步驟進行二個試樣的平行試驗。

4、結(jié)果與計算：

4.1試樣用活塞測定砂當量值按JTJ058-2000公路規(guī)程式（5.1 mso-hansi-font-family:"Times New Roman"">）計算：

SE=（h2/h1) mso-hansi-font-family:"Times New Roman"">×100%

mso-hansi-font-family:"Times New Roman"">式中：SE "Times New Roman"">為試樣的砂當量，%

h1為試筒中絮凝物和沉淀物的總高度，mm

h2為試筒中用活塞測定沉淀物的高度，mm

4.2試樣的目測砂當量值按JTJ058-2000公路規(guī)程式（5.2 mso-hansi-font-family:"Times New Roman"">）計算：

SEV=(h2/h1)×100%

mso-hansi-font-family:"Times New Roman"">式中：SEV "Times New Roman"">為試樣的目測砂當量值：

h1為試筒中絮凝物和沉淀物的總高度，mm

h2為試筒中用目測測定沉淀物的高度，mm

4.3一種集料應(yīng)平行測定兩次，集料的砂當量SE mso-hansi-font-family:"Times New Roman"">或SEV "Times New Roman"">是二個試樣平行測定的砂當量平均值，以活塞測量為準，并以整數(shù)表示。

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