一，数显叶轮搅拌器产品简介：

石粉含量测定仪采用**的调频、数控、技术,提高了试验精度与速度。石粉含量测定仪是按照T0349-2005规范，<细集料试验>而设计的仪器。适用于确定细集料中是否存在膨胀性粘土矿物，并测定其含量，以评定集料的洁净程度，以值MBV表示。

Product introduction of stone powder content analyzer:

The stone powder content tester uses the best frequency modulation, numerical control and technology to improve the test accuracy and speed. The stone powder content measuring instrument is designed according to the Ministry of Communications T0349-2005 specification, . It is suitable for determining the presence of swellable clay minerals in fine aggregates and determining their content to assess the cleanliness of the aggregates, expressed as methylene blue value MBV.

二，数显叶轮搅拌器技术参数：

★搅拌转速自控：600±60r/min 400±40r/min

★计时装置： 大90分钟 分辨率1秒

★转速测量误差： ±2r/min

★搅拌叶轮： Φ75±10mm

★玻璃瓶容量： 1l

★自控功能： 可选择MB测定法或快速试验法

★外形尺寸：300X200X600mm

★重量：15kg

Second, the technical parameters of stone powder content analyzer:

★ Automatic control of stirring speed: 600 ± 60r / min 400 ± 40r / min

★ Timing device: 90 minutes, 1 second resolution

★ Speed measurement error: ± 2r / min

★ Stirring impeller: Φ75 ± 10mm

★ Glass bottle capacity: 1l

★ Automatic control function: Methylene blue MB test method or methylene blue rapid test method can be selected

★ Dimensions: 300X200X600mm

★ Weight: 15kg

三，数显叶轮搅拌器使用方法：

★时间设定：接通电源，先按“时间设置”拨码器，时间显示为3位。A大时间为999秒。例如：设定搅拌时间为8分钟，拨码器设为480。搅拌8分钟后，搅拌自动停止。如需继续搅拌4分钟，可将拨码器设为240，按一下清零开关仪器从新工作，即搅拌4分钟后停止。每次搅拌停止后，仪器能自动蜂鸣报警。

★转速设定：当仪器接通电源后，拨动“速度选择”开关，速度600转/min，可转换为400转/min。

★启动仪器：当时间与速率设定完成后，按下启动开关，即进入搅拌状态。如中途停止搅拌，再次按下启动开关又进入工作状态。

Third, the use of stone powder content analyzer:

★ Time setting: Turn on the power, first press the "time setting" dialer, the time is displayed as 3 digits. The big time is 999 seconds. Example: Set the stirring time to 8 minutes and the dialer to 480. After stirring for 8 minutes, stirring stopped automatically. If you need to continue stirring for 4 minutes, you can set the dial to 240, press the zero switch once to restart the instrument, that is, stop after stirring for 4 minutes. After each stirring stop, the instrument can automatically beep.

★ Speed setting: When the instrument is powered on, toggle the "speed selection" switch, the speed is 600 rpm, which can be converted to 400 rpm.

★ Start the instrument: When the time and rate settings are completed, press the start switch to enter the stirring state. If you stop stirring in the middle, press the start switch again to enter the working state.

四，数显叶轮搅拌器适用范围：

★本方法适用于确定细集料中是否存在膨胀性粘土矿物，并测定其含量，以评定集料的洁净程度，以值MBV表示。

★本方法适用于小于2.36㎜或小于0.15㎜的细集料，也可用于矿粉的质量检验。

★当细集料中的0.075㎜通过率小于3%时，可不进行此项试验即作为合格看待。

Fourth, the scope of application of stone powder content analyzer:

★ This method is suitable for determining the presence of swellable clay minerals in fine aggregates and determining their content to assess the cleanliness of the aggregates, expressed as methylene blue value MBV.

★ This method is suitable for fine aggregates less than 2.36㎜ or less than 0.15㎜, and can also be used for quality inspection of mineral powder.

★ When the 0.075㎜ pass rate in the fine aggregate is less than 3%, it can be regarded as qualified without this test.

五，数显叶轮搅拌器试验步骤：

★标准溶液910.0g/L±0.1g/L标准浓度)配制；

(1)测定中的水分含量w。称取5g左右的粉末，记录质量mh，**到0.01g。在100℃±5℃的温度下烘干至恒重(若干温度超过105℃，粉末会变质)，在干燥器中冷却，然后称重，记录质量mg，**到0.01g。按式(T0349-1)计算的含水率w

w = (mh-Mg)/mg×100

式中：mh—粉末的质量(g)；

mg—干燥后的质量(g)。

(2)取粉末(100＋w)(10g±0.01g)/100(即干粉末质量10g)，**至0.01g。

(3)加热盛有约600mL洁净水的烧杯，水温不超过40℃。

(4)边搅动边加入粉末，持续搅动45min，直至粉末全部溶解为止，然后冷却至20℃。

(5)将溶液倒入1L容量瓶中，用洁净水淋洗烧杯等，使所有溶液全部移入容量瓶，容量瓶和溶液的温度应保持在20℃±1℃，加洁净水至容量瓶1L刻度。

(6)摇晃容量瓶以保证粉末溶解。将标准液移入深色储藏瓶中，标准溶液保质期应不超过28d。配制好的溶液应标明制备日期、失效日期，并避光保存。

★制备细集料悬浊液

(1)取代表性试样，缩分至约400g，置烘箱中在105℃±5℃条件下烘干至恒重，待冷却至室温后，筛除大于2.36mm颗粒，分两部分备用 。

(2)称取试样200g，**至0.1g。将试样倒入盛有500mL±5mL洁净水的烧杯中，将搅拌器速度调到600min，搅拌器叶轮离烧杯底部约10mm。搅拌5min，形成悬浊液，用移液管准确加入5mL溶液，然后保持400r/min±40r/min转速不断搅拌，直到试验结束。

★吸附量的测定

(1)将滤纸架空放置在敞口烧杯的顶部，使其不与任何其它物品接触。

(2)细集料悬浊液在加入溶液并经400r/min±40r/min转速搅拌1min起，在滤纸上进行A次色晕检验。即用玻璃棒沾取一滴悬浊液滴于滤纸上，液滴在滤纸上形成环状，中间是集料沉淀物，溶液的数量应使沉淀物直径在8mm~12mm之间。外围环绕一圈无色的水环。当在沉淀物周围边缘放射出一个宽度约1mm左右的浅蓝A晕时，试验成为阳性。

(3)如果A次的5mL没有使沉淀物周围出现色晕，再向悬浊液中加入5mL溶液，继续搅拌1min，再用玻璃棒沾取一滴悬浊液，滴于滤纸上，进行二次色晕试验，若沉淀物周围仍未出现色晕，重复上述步骤，直到沉淀物周围放射出约1mm的稳定浅蓝A晕。

(4)停止滴加溶液，但继续搅拌悬浊液，每1min进行一次色晕试验。若色晕在A初的4min内消失，再加入5mL溶液；若色晕在第5min消失，再加入2mL溶液。两种情况下，均应继续搅拌并进行色晕试验，直至色晕可持续5min为止。

(5)记录色晕持续5min时所加入的溶液总体积，**至1mL。

★的快速评价试验

(1)按三.2.(1)及三.2.(2)要求制样及搅拌。

(2)一次性向烧杯中加入30mL溶液，以400r/min±40r/min转速持续搅拌8min然后用玻璃棒粘取一滴悬浊液，滴于滤纸上，观察沉淀物周围是否出现明显色晕。

★小于0.15mm粒径部分的值MBVF 的测定

按三.1~三.3的规定准确试样，进行试验测试，但试样为0~0.15mm部分，取30g±0.1g。

★按T0333的筛洗法测定细集料中含泥量或石粉含量。

Five, stone powder content tester test steps:

★ Standard methylene blue solution 910.0g / L ± 0.1g / L standard concentration).

(1) The water content w in methylene blue is measured. Weigh about 5g of methylene blue powder, record the mass mh, ** to 0.01g. Dry at 100 ℃ ± 5 ℃ to constant weight (some temperature exceeds 105 ℃, methylene blue powder will deteriorate), cool in a desiccator, then weigh, record the mass mg, ** to 0.01g. Calculate the water content of methylene blue according to formula (T0349-1)

w = (mh-Mg) / mg × 100

In the formula: mh—mass of methylene blue powder (g);

mg—mass of methylene blue after drying (g).

(2) Take methylene blue powder (100 + w) (10g ± 0.01g) / 100 (that is, the mass of methylene blue dry powder is 10g), ** to 0.01g.

(3) The beaker containing about 600 mL of clean water is heated, and the water temperature does not exceed 40 ° C.

(4) Add the methylene blue powder while stirring, and continue stirring for 45 minutes until the methylene blue powder is completely dissolved, and then cool to 20 ° C.

(5) Pour the solution into a 1L volumetric flask, rinse the beaker, etc. with clean water, and move all the methylene blue solution into the volumetric flask. The temperature of the volumetric flask and solution should be maintained at 20 ° C ± 1 ° C. Volumetric flask 1L scale.

(6) Shake the volumetric flask to ensure that the methylene blue powder is completely dissolved. Transfer the standard solution into a dark-colored storage bottle. The shelf life of the standard solution of methylene blue should not exceed 28 days. The prepared solution should be marked with the date of preparation and expiration date, and stored away from light.

★ Preparation of fine aggregate suspension

(1) Take a representative sample, shrink it to about 400g, and place it in an oven at 105 ° C ± 5 ° C to dry to a constant weight. After cooling to room temperature, remove particles larger than 2.36mm and divide it into two parts for use.

(2) Weigh 200g of sample, ** to 0.1g. Pour the sample into a beaker containing 500mL ± 5mL of clean water, adjust the speed of the stirrer to 600min, and the impeller of the stirrer is about 10mm from the bottom of the beaker. Stir for 5min to form a suspension. Accurately add 5mL of methylene blue solution with a pipette, and then keep stirring at a speed of 400r / min ± 40r / min until the end of the test.

★ Determination of methylene blue adsorption

(1) Place the filter paper overhead on the top of the open beaker so that it does not come into contact with any other items.

(2) After adding the methylene blue solution to the fine aggregate suspension and stirring at a speed of 400 r / min ± 40 r / min for 1 min, perform a color haze test on the filter paper. That is, use a glass rod to dip a drop of suspended liquid on the filter paper, and the droplets form a ring on the filter paper, with the aggregate sediment in the middle. The amount of the solution should be such that the diameter of the precipitate is between 8mm and 12mm. The periphery is surrounded by a colorless water ring. The test became positive when a light blue A halo with a width of about 1 mm was radiated around the edge of the sediment.

(3) If 5 mL of methylene blue from A time does not cause color haze around the precipitate, add 5 mL of methylene blue solution to the suspension, continue stirring for 1 min, and then take a drop of the suspension with a glass rod and drop it on On the filter paper, perform a secondary halo test. If the halo does not appear around the sediment, repeat the above steps until a stable light blue A halo is emitted around the precipitate.

(4) The dropwise addition of the methylene blue solution is stopped, but the suspension is continuously stirred, and a halo test is performed every 1 min. If the color halo disappears within 4 minutes of the initial stage of A, then add 5 mL of methylene blue solution; if the color halo disappears within the first 5 minutes, add 2 mL of methylene blue solution. In both cases, the stirring and the halo test should be continued until the halo can last for 5 minutes.

(5) Record the total volume of the methylene blue solution added when the halo lasts for 5 minutes, ** to 1 mL.

★ Methylene blue rapid evaluation test

(1) Prepare samples and stir according to the requirements of 3..2. (1) and 3..2. (2).

(2) Add 30mL of methylene blue solution to the beaker at one time, continue stirring for 8min at a speed of 400r / min ± 40r / min, then stick a drop of suspension with a glass rod, drop it on the filter paper, and observe whether a clear color appears around the precipitate gosh.

★ Measurement of methylene blue value MBVF of particle size less than 0.15mm

Carry out the methylene blue test according to the accurate samples specified in III.1 to III.3, but for the sample of 0 ~ 0.15mm, take 30g ± 0.1g.

★ Measure the mud content or stone powder content in fine aggregate according to the sieve washing method of T0333.

六，数显叶轮搅拌器公式：

★细集料值MBV按式(T0349-2)计算，**至0.1。

Six, stone powder content analyzer formula:

★ The MBV of the fine aggregate methylene blue is calculated according to the formula (T0349-2), ** to 0.1.

式中：MBV—值(g/kg)，表示每千克0~2.36mm粒级试样所消耗的克数； m—试样质量(g)；V—所加入的溶液的总量(mL)；

★快速试验结果评定

若沉淀物周围出现明显色晕，则判定快速试验为合格，若沉淀物周围未出现明显色晕，则判定快速试验不为合格。

★小于0.15mm部分或矿粉的值MBVF按式(0349-3)计算，**至0.1。

In the formula: MBV—methylene blue value (g / kg), which represents the number of grams of methylene blue consumed per kilogram of 0 to 2.36mm particle size sample; m—sample mass (g); V—added The total amount of methyl blue solution (mL);

★ Methylene blue rapid test results evaluation

If there is obvious color halo around the sediment, then the methylene blue rapid test is judged as a pass; if there is no obvious color halo around the sediment, the methylene blue rapid test is judged as a disqualification.

★ MBVF of methylene blue value less than 0.15mm or mineral powder is calculated according to formula (0349-3), ** to 0.1.

式中：MBVF——值(g/kg)，表示每千克0~0.15mm粒级或矿粉试样所消耗的克数；m1—试样质量(g)；V1—加入的溶液的总量(mL)

★细集料中含泥量或矿粉含量计算和评定按T0333的方法进行。

In the formula: MBVF——methylene blue value (g / kg), which represents the grams of methylene blue consumed per kilogram of 0 ~ 0.15mm particle size or ore powder sample; m1—sample mass (g); V1— Total amount of methylene blue solution added (mL)

★ The calculation and evaluation of mud content or mineral powder content in fine aggregate shall be carried out according to the method of T0333.

七，石粉含量测定仪注意事项：

本仪器供电为220V 50Hz，用户电源电压超过240V或低于180V时必须考虑配稳压电源，否则会对转速产生影响。

Seven, matters needing attention of stone powder content analyzer:

The power supply of this instrument is 220V 50Hz. When the user's power supply voltage exceeds 240V or lower than 180V, a regulated power supply must be considered, otherwise the speed will be affected.