石膏粉的凝結(jié)時(shí)間分為初凝時(shí)間及終凝時(shí)間。前者是在標(biāo)準(zhǔn)稠度的用水量下，石膏粉與水拌合直到混合料漿失去流動(dòng)性開(kāi)始變稠時(shí)所經(jīng)過(guò)的時(shí)間；后者是在標(biāo)準(zhǔn)稠度用水量下，石膏粉與水拌合到混合料漿固化時(shí)所經(jīng)過(guò)的時(shí)間。那么如何檢測(cè)其石膏粉的凝結(jié)時(shí)間？石膏粉生產(chǎn)廠家?guī)Т蠹襾?lái)了解一下。

　　The setting time of gypsum powder is divided into initial setting time and final setting time. The former refers to the time elapsed when gypsum powder is mixed with water at a standard consistency of water until the mixture loses its fluidity and begins to thicken; The latter refers to the time it takes for gypsum powder and water to solidify when mixed with water at standard consistency. So how to detect the setting time of its gypsum powder? Gypsum powder manufacturers will take you to learn more.

　　要知道合適的凝結(jié)時(shí)間是石膏粉生產(chǎn)時(shí)能否正常使用的重要因素。其初凝時(shí)間過(guò)短或者終凝時(shí)間過(guò)長(zhǎng)都會(huì)影響正常生產(chǎn)。所以事先檢測(cè)石膏粉的凝結(jié)時(shí)間是非常有必要的。

　　It should be noted that the appropriate setting time is an important factor in the normal use of gypsum powder during production. If the initial setting time is too short or the final setting time is too long, it will affect normal production. So it is very necessary to check the setting time of gypsum powder in advance.

　　通常檢測(cè)石膏粉凝結(jié)時(shí)間的方法有劃痕法、維卡儀法兩種。其中劃痕法是使用比較普遍的一種檢測(cè)方法。其步驟如下：

　　There are usually two methods for detecting the setting time of gypsum powder: scratch method and Vicat apparatus method. The scratch method is a commonly used detection method. The steps are as follows:

　　1、將100毫升水倒入500毫升容器中，再將石膏粉試樣在1分鐘之內(nèi)均勻的撒在水中，靜置30秒后，快速攪拌30秒，之后把石膏漿體倒入放置在在表面擦勻麻油的玻璃板上的銅管內(nèi)，之后慢慢垂直向上提起銅管到20毫米處，讓石膏漿體平鋪成直徑100毫米-120毫米，厚度在5毫米的試餅。

　　1. Pour 100 milliliters of water into a 500 milliliter container, then evenly sprinkle the gypsum powder sample in the water within 1 minute, let it stand for 30 seconds, quickly stir for 30 seconds, and then pour the gypsum slurry into a copper tube placed on a glass plate with evenly brushed sesame oil on the surface. Slowly lift the copper tube vertically up to 20 millimeters, and let the gypsum slurry spread evenly into a test cake with a diameter of 100-120 millimeters and a thickness of 5 millimeters.

　　2、用5毫米直徑的玻璃棒每隔30秒劃割1次，且每次劃后需用軟布將玻璃棒擦拭干凈。一直到劃痕兩邊的料漿不再合攏時(shí)即為初凝。其初凝時(shí)間通常從石膏粉撒入水中開(kāi)始算起，直到不再合攏。

　　2. Use a 5mm diameter glass rod to cut every 30 seconds, and wipe the glass rod clean with a soft cloth after each cut. The initial setting is when the slurry on both sides of the scratch no longer closes. The initial setting time is usually calculated from the moment gypsum powder is sprinkled into water until it no longer closes.

　　3、測(cè)定初凝后的試餅上用大拇指每隔10秒按壓1次，當(dāng)按壓到印痕邊緣沒(méi)有水分出現(xiàn)即為終凝。其終凝時(shí)間通常由石膏粉撒入水中開(kāi)始算起，直到邊緣沒(méi)有水分結(jié)束。

　　3. Press the test cake with your thumb every 10 seconds after initial setting. When no moisture appears at the edge of the imprint, it is considered final setting. The final setting time is usually calculated from the moment gypsum powder is sprinkled into water until there is no moisture at the edge.

　　本文由  濟(jì)南石膏粉  友情奉獻(xiàn).更多有關(guān)的知識(shí)請(qǐng)點(diǎn)擊  http://m.netjobs.cc/   真誠(chéng)的態(tài)度.為您提供為全面的服務(wù).更多有關(guān)的知識(shí)我們將會(huì)陸續(xù)向大家奉獻(xiàn).敬請(qǐng)期待.

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