改(gai)性(xing)劑(ji)是(shi)(shi)指對(dui)鎂水(shui)泥有(you)(you)(you)改(gai)性(xing)作(zuo)用(yong)的(de)各種材料(liao)(liao)。它(ta)(ta)既可以是(shi)(shi)專門(men)生產的(de)用(yong)于(yu)(yu)改(gai)性(xing)的(de)化(hua)工制劑(ji)，也可以是(shi)(shi)其它(ta)(ta)任(ren)何(he)材料(liao)(liao)，如含有(you)(you)(you)改(gai)性(xing)成分的(de)各種工業廢(fei)渣(zha)，某一類化(hua)工產品(pin)等。它(ta)(ta)包含狹義(yi)改(gai)性(xing)劑(ji)在內。因此(ci)，它(ta)(ta)的(de)概(gai)念比較廣(guang)泛。這種廣(guang)義(yi)的(de)改(gai)性(xing)劑(ji)不(bu)能全部作(zuo)為改(gai)性(xing)商品(pin)，只有(you)(you)(you)其中一部門(men)可用(yong)于(yu)(yu)改(gai)性(xing)商品(pin)。

鎂水泥外加(jia)劑(ji)(ji)(ji)(ji)很多，但并不(bu)是所(suo)有的外加(jia)劑(ji)(ji)(ji)(ji)均為改(gai)(gai)性劑(ji)(ji)(ji)(ji)，.有些(xie)是功能外加(jia)劑(ji)(ji)(ji)(ji)，二者(zhe)不(bu)能相混淆。功能外加(jia)劑(ji)(ji)(ji)(ji)和改(gai)(gai)性外加(jia)劑(ji)(ji)(ji)(ji)是兩(liang)個(ge)不(bu)同的概念。鎂嘉圖(tu)GX-Ⅴ系列改(gai)(gai)性劑(ji)(ji)(ji)(ji)為復合改(gai)(gai)性劑(ji)(ji)(ji)(ji)。

改性(xing)(xing)(xing)(xing)(xing)外(wai)加(jia)(jia)(jia)劑(ji)主要是(shi)(shi)為了克(ke)(ke)服(fu)鎂(mei)(mei)(mei)水泥的(de)(de)各(ge)種(zhong)(zhong)弊(bi)病，改善其性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)才添(tian)加(jia)(jia)(jia)的(de)(de)。功能(neng)(neng)(neng)(neng)性(xing)(xing)(xing)(xing)(xing)外(wai)加(jia)(jia)(jia)劑(ji)并非(fei)是(shi)(shi)改善鎂(mei)(mei)(mei)水泥的(de)(de)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)，而是(shi)(shi)賦(fu)(fu)予鎂(mei)(mei)(mei)水泥以各(ge)種(zhong)(zhong)特殊(shu)的(de)(de)功能(neng)(neng)(neng)(neng)，它(ta)(ta)不(bu)(bu)能(neng)(neng)(neng)(neng)克(ke)(ke)服(fu)其各(ge)種(zhong)(zhong)弊(bi)病。例如，功能(neng)(neng)(neng)(neng)性(xing)(xing)(xing)(xing)(xing)外(wai)加(jia)(jia)(jia)劑(ji)并非(fei)是(shi)(shi)改善鎂(mei)(mei)(mei)水泥的(de)(de)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)，而是(shi)(shi)賦(fu)(fu)予鎂(mei)(mei)(mei)水泥以各(ge)種(zhong)(zhong)特殊(shu)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)，它(ta)(ta)不(bu)(bu)能(neng)(neng)(neng)(neng)克(ke)(ke)服(fu)其各(ge)種(zhong)(zhong)弊(bi)病。例如，功能(neng)(neng)(neng)(neng)性(xing)(xing)(xing)(xing)(xing)外(wai)加(jia)(jia)(jia)劑(ji)的(de)(de)珠顏(yan)料(liao)，它(ta)(ta)可以使(shi)(shi)鎂(mei)(mei)(mei)水泥外(wai)觀閃亮，增加(jia)(jia)(jia)其美觀性(xing)(xing)(xing)(xing)(xing)，但卻(que)不(bu)(bu)會(hui)改變制(zhi)品(pin)(pin)的(de)(de)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)(neng)。再如功能(neng)(neng)(neng)(neng)性(xing)(xing)(xing)(xing)(xing)外(wai)加(jia)(jia)(jia)劑(ji)磁粉，它(ta)(ta)可以使(shi)(shi)制(zhi)品(pin)(pin)具有很強(qiang)的(de)(de)磁性(xing)(xing)(xing)(xing)(xing)，但它(ta)(ta)并不(bu)(bu)能(neng)(neng)(neng)(neng)克(ke)(ke)服(fu)制(zhi)品(pin)(pin)的(de)(de)各(ge)種(zhong)(zhong)弊(bi)病。功能(neng)(neng)(neng)(neng)性(xing)(xing)(xing)(xing)(xing)外(wai)加(jia)(jia)(jia)劑(ji)與改性(xing)(xing)(xing)(xing)(xing)外(wai)加(jia)(jia)(jia)劑(ji)的(de)(de)添(tian)加(jia)(jia)(jia)目的(de)(de)是(shi)(shi)不(bu)(bu)同(tong)的(de)(de)，二者的(de)(de)功效(xiao)也不(bu)(bu)同(tong)。