騰達(dá)試驗(yàn)儀器廠：

　　一、產(chǎn)品簡(jiǎn)介：

　　石膏保水率測(cè)定儀是**檢測(cè)儀器，依據(jù)中華人民共和國國家建材行業(yè)標(biāo)準(zhǔn)《粉刷石膏》（JC/T517-2004）而研制的用來檢測(cè)粉刷石膏的保水率的測(cè)定，同時(shí)也可用于水泥、砂漿保水率試驗(yàn)。

　　Product introduction:

　　Gypsum water retention tester is a testing instrument.It is developed in accordance with the National Building Material Industry Standard of the People's Republic of China"stucco plaster"(JC/T517-2004)to measure the water retention rate of stucco plaster.It can also be used for cement,Mortar water retention test.

　　二、技術(shù)參數(shù)：

　　?布氏漏斗，內(nèi)徑150mm，深65mml，孔徑2mm，孔數(shù)169個(gè)。

　　?耐震真空表0至0.1MPa

　　?真空泵負(fù)壓可達(dá)0.1MPa

　　?T型刮板，由厚為1mm的硬質(zhì)耐磨材料制成。

　　?抽濾瓶5000ml。

　　?電源電壓:220V 50Hz.

　　?外形尺寸:700×400×600mm

　　?功率：200W

　　?凈重：30Kg

　　Technical parameters:

　　?Brinell funnel,inner diameter 150mm,depth 65mml,hole diameter 2mm,number of holes 169.

　　?Seismic vacuum gauge 0 to 0.1MPa

　　Vacuum pump negative pressure can reach 0.1MPa

　　?T-type scraper,made of hard wear-resistant material with a thickness of 1mm.

　　?5000ml filter bottle.

　　Power supply voltage:220V 50Hz.

　　Dimensions:700×400×600mm

　　?Power:200W

　　?Net weight:30Kg

　　三、實(shí)驗(yàn)步驟：

　　A、按布式漏斗內(nèi)徑裁剪中速定性濾紙一張，將其鋪在漏斗底部，濾紙和濾紙用水浸濕。將布式漏斗放在抽濾瓶上，開啟真空泵，抽濾一分鐘，取下布式漏斗，用濾紙將下口殘余供應(yīng)商上海榮計(jì)達(dá)實(shí)驗(yàn)儀器有限公司的水擦凈后稱量(G1),精確至0.1克。

　　B、采用具有標(biāo)準(zhǔn)擴(kuò)散度用水量的石膏漿放入稱量后的布式漏斗內(nèi)，用T型刮板在漏斗中垂直旋轉(zhuǎn)刮平，使料漿厚度保持在（10±0.5）mm范圍內(nèi)，擦凈布式漏斗內(nèi)壁上的殘余石膏漿，稱量(G2)，精確至0.1克。從攪拌完畢到稱量完成的時(shí)間間隔不應(yīng)大于5分鐘。

　　C、將稱量后的布式漏斗放到抽濾瓶上，開動(dòng)真空泵。在三十秒之內(nèi)將負(fù)壓調(diào)至（53.33±0.67）kpa.抽濾20分鐘，然后取下漏斗，用濾紙將下口殘余水擦凈，稱量(G3)，精度0.1克。

　　若連續(xù)兩次測(cè)得的保水率與其平均值的差不大于3%，取該平均值作為試驗(yàn)的保水率，否則應(yīng)該重做試驗(yàn)。

　　Third,the experimental steps:

　　A.Cut a piece of medium-speed qualitative filter paper according to the inner diameter of the cloth funnel,spread it on the bottom of the funnel,ａnd wet the filter paper and filter paper with water.Place the cloth funnel on the suction filter bottle,turn on the vacuum pump,filter for one minute,remove the cloth funnel,ａnd use a filter paper to clean the water from the remaining supplier Shanghai Rongjida Experimental Instrument Co.,Ltd.ａnd weigh(G1),Accurate to 0.1 grams.

　　B.Use gypsum slurry with standard diffusion water into the weighed cloth funnel,ａnd use a T-shaped scraper to rotate and scrape in the funnel to make the thickness of the slurry within(10±0.5)mm.Clean the remaining gypsum slurry on the inner wall of the cloth funnel and weigh(G2)to the nearest 0.1 g.The time interval from the completion of stirring to the completion of weighing should not be greater than 5 minutes.

　　C.Put the weighed cloth funnel on the filter bottle and start the vacuum pump.Within thirty seconds,adjust the negative pressure to(53.33±0.67)kpa.Strain for 20 minutes,then remove the funnel,wipe the remaining water in the lower mouth with filter paper,ａnd weigh(G3)with an accuracy of 0.1 g.

　　If the difference between the measured water retention rate and its average value is not more than 3%,take the average value as the water retention rate of the test,otherwise the test should be repeated.

　　四、產(chǎn)品結(jié)構(gòu)：

　　石膏砂漿保水率測(cè)定儀主要由旋片式真空泵、耐震真空表、抽濾瓶、布氏漏斗等部分組成，控制系統(tǒng)方便靈活，易于操作，整機(jī)布局合理，層次分明，適合各級(jí)質(zhì)量檢測(cè)部門及用戶的使用。

　　Product structure:

　　Gypsum mortar water retention rate tester is mainly composed of rotary vane vacuum pump,shock-resistant vacuum gauge,suction filter bottle,Buchner funnel and other parts.The control system is convenient and flexible,easy to operate,the whole machine layout is reasonable,ａnd the levels are clear,suitable for quality inspection departments at all levels.And user use.