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<span>人氣：824次</span> </p> </div> <div id="xtdrtnn" class="ui-show-image"> </div> <div id="vrjhll9" class="content-body"> <p>混凝土外加劑是在攪拌混凝土過(guò)程中摻入，占水泥質(zhì)量5%以下的，能顯著(zhù)改善混凝土性能的化學(xué)物質(zhì)?；炷镣饧觿┑奶攸c(diǎn)是品種多、摻量小，對混凝土的性能影響較大具有投資少、見(jiàn)效快、技術(shù)經(jīng)濟效益顯著(zhù)的特點(diǎn)。隨著(zhù)科學(xué)技術(shù)的不斷進(jìn)步，外加劑已越來(lái)越多地得到應用，外加劑已成為混凝土除4種基本組分以外的第5種重要組分。</p><p>混凝土外加劑分類(lèi)：</p><p>1、早強劑：</p><p>A、可溶性無(wú)機鹽：氯化物、碳酸鹽、硝酸鹽、硫代硫酸鹽、硅酸鹽、鋁酸鹽、堿性氫氧化物等</p><p>B、可溶性有機物：三乙醇胺、甲酸鈣、乙酸鈣、丙酸鈣和丁酸鈣、尿素、草酸、胺與甲醛縮合物。</p><p>2、速凝劑：鐵鹽、氟化物、氯化鋁、鋁酸鈉、碳酸鉀。</p><p>3、引氣劑：木材樹(shù)脂鹽、合成洗滌劑、木質(zhì)素磺酸鹽、蛋白質(zhì)的鹽、脂肪酸和樹(shù)脂酸及其鹽。</p><p>4、減水劑和調凝劑：木質(zhì)素磺酸鹽及其改性或衍生物、羥基羧酸及其鹽或其改性和衍生物、無(wú)機鹽（鋅鹽、硼酸鹽、磷酸鹽、氯化物）、銨鹽及其衍生物、碳水化合物及多聚糖酸或糖酸、水溶性聚合物（纖維素醚、密胺衍生物、萘衍生物、聚硅氧烷和磺化碳氫化合物</p><p>5、高效減水劑：萘磺酸鹽甲醛縮合物、多環(huán)芳烴磺酸鹽甲醛縮合物、三聚氰胺磺酸鹽甲醛縮聚物、對胺基苯磺酸甲醛縮聚物、磺化酮醛縮聚物、聚丙烯酸鹽及其接枝共聚物等。</p><p>6、緩凝劑：含有羧基、膦酸基、磺酸基的聚合物和羥基羧酸（鹽）、有機膦酸（鹽）等有機物類(lèi)緩凝劑</p><p>7、加氣劑：過(guò)氧化氫、金屬鋁粉、吸附空氣的某些活性碳。</p><p>8、膨脹劑：細鐵粉或粒狀鐵粉與氧化促進(jìn)劑、石灰系、硫鋁酸鹽系。</p><p>9、粘結劑：合成乳膠、天然橡膠乳膠。</p><p>10、泵送劑：合成或天然水溶性聚合物增加劑的粘度、有機絮凝劑、高比表面無(wú)機材料（膨潤土、二氧化硅、石棉粉、石棉短纖維等）、水泥外摻料（粉煤灰、水硬石灰、石粉等）。</p><p>11、絮凝劑：聚合物電解質(zhì)。</p><p>12、著(zhù)色劑：灰到黑（氧化鐵黑、礦物黑、炭黑、群青、酞青藍）、淺紅到深紅（氧化鐵紅）、棕（氧化鐵棕、富錳棕土、燒褐土）、綠（氧化鉻綠、酞商姆）、白（二氧化鈦）等。</p><p>13、滅菌劑和殺蟲(chóng)劑：多鹵化物、狄氏劑乳液及銅化物。</p><p>14、防潮劑：皂類(lèi)、丁基硬脂酸、某些石油產(chǎn)品</p><p>15、防滲劑：減水劑、氯化鈣。</p><p>16、堿集料反應抑止劑：鋰鹽、鋇鹽、某些引氣劑、減水劑、緩凝劑、火山灰。</p><p>17、阻銹劑：亞硝酸鈉、苯甲酸鈉、木質(zhì)素磺酸鈣、磷酸鹽、氟硅酸鈉、氟鋁酸鈉。</p><p>18、灌漿外加劑：緩凝劑、凝膠、凝膠淀粉和甲基纖維素、膨潤土、增稠劑、早強劑、加氣劑。</p> 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