加仑比重杯操作程序

八戒

PROCEDURE操作程序

1)By means of the water bath or cabinet, control the temperature of sample and pyknometer at

23°C ± 2°C.

Weigh the empty dry cup and lid to an accuracy of 1mg (to 0.2mg for high accuracy). Record as

M1.

在恒温室内或用水浴的方法，将样品和比重杯的温度控制在23°C ± 2°C。称量空的比重杯和盖子，精确到1毫克。计作M1.

2）Remove the lid of the pyknometer and slowly pour in the test liquid, avoiding the formation of

excessive air bubbles - add until the liquid level is just below the top, so that when the lid is

carefully fitted and pressed in place, a small amount of excess paint will be expressed through

the hole in the centre of the lid. With experience it is possible to judge the amount added so that

only a small drop of excess liquid is expressed, which can be scraped off easily with the palette

knife and the lid carefully wiped clean with clean tissue.

拿开盖子，将待测液体慢慢的加入比重杯，不要产生气泡。刚好加到杯子顶部时，盖紧盖子，多余的液体从盖子中间的小孔中溢出，用干净的薄纸小心擦净。
3）Weigh the cup and contents to an accuracy of 1mg and record as M2.

Calculate the Density = M2 – M1 / volume of cup in milliliters
grams per millilitre ( = kg/l)

称量杯子的总重，精确到1毫克，计作M2；计算比重：=M2-M1/杯子的体积（以毫升计）。

克/毫升（=kg/L）。

4）Procedure for paints containing coarse aggregate

含粗颗粒的涂料测试方法

By means of the water bath or cabinet, control the temperature of the sample and pyknometer at

23°C ±
2°C.

Tare the pynometer to an accuracy of ±
0.01g.

Part fill the pyknometer (approximately 50-70% full) with the sample, taking care to avoid the

formation of air bubbles. Weigh the pyknometer and contents to an accuracy of ±
0.01g and

record the mass of the paint used (M1).

在恒温室内或用水浴的方法，将样品和比重杯的温度控制在23°C ± 2°C。称量空的比重杯和盖子，

精确到1毫克。

装入部分样品（约占杯子的50-70%），注意不要产生气泡。称重，精确到1毫克，涂料质量计作M1。

Fill the space left in the pyknometer with a displacement liquid of known relative density (D1)

and ensure any entrapped air is removed. It is recommended that a solvent compatible with the

test sample is used as the displacement liquid. Fit the lid to the pyknometer, remove the overflow

and wipe clean and dry with absorbent tissue. Weigh the pynometer and contents to an accuracy of ±
0.01g and record the mass of paint and displacement liquid (M2)
Calculation:

Volume of test material (V) = 100 - [(M2 – M1) / D1]

Relative density of test material = M1/V

用已知比重（D1）的液体装满比重杯，确保杯子内的气泡全部被除掉。所用溶剂应与涂料相混溶，盖好

盖子，除掉多余的溶剂，擦干净杯子，称重，精确到1毫克；溶剂和涂料的质量计作M2；计算：

涂料的体积（V）=100 - [(M2 – M1) / D1]

涂料的比重= M1/V.