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15:59:08</span> <span>人氣：486次</span> </p> </div> <div id="vjnl9pl" class="ui-show-image"> </div> <div id="bntxlnt" class="content-body"> <p><span>各種各樣的混凝土外加劑應用，不但可以改善混凝土的性能，還促進(jìn)了混凝土新技術(shù)的發(fā)展，促進(jìn)了工業(yè)副產(chǎn)品在膠凝材料系統中更多的應用，還有助于節約資源和保護環(huán)境，已經(jīng)逐步成為優(yōu)質(zhì)混凝土必不可少的材料。其中的減水劑就是混凝土用的一種，減水劑是一種在維持混凝土坍落度基本不變的條件下，能減少拌合用水量的混凝土外加劑。大多屬于陰離子表面活性劑，有木質(zhì)素磺酸鹽、萘磺酸鹽甲醛聚合物等。當我們加入混凝土拌合物后對水泥顆粒有分散作用，能改善其工作性，減少單位用水量，改善混凝土拌合物的流動(dòng)性；或減少單位水泥用量，有效節約水泥。</span></p><p><span>下面教大家一起來(lái)做減水劑配方及一些制作方法？</span></p><p><span>混凝土用減水劑配方制作實(shí)驗設備：</span></p><p><span>四口燒瓶；加熱器；攪拌器；溫度計；滴液漏斗；</span></p><p><span>混凝土用減水劑反應物料比例：</span></p><p><span>總預投：500g（醇酸摩爾比=1：2.5-3）</span></p><p><span>烯丙醇聚醚90g；馬來(lái)酸酐+軟水=10g+200g；引發(fā)劑K（一般為過(guò)硫酸銨）+軟水=3g+40g；50%NaOH:16g（緩慢中和至PH：7-8）；剩余軟水=140g-160g。</span></p><p><span>混凝土用減水劑配方具體操作方法：</span></p><p><span>1.馬來(lái)酸酐按所需量配制成5-7%溶液記為頭料。</span></p><p><span>2.引發(fā)劑配成5-10%溶液待用。</span></p><p><span>3.加入所需量的APEG或TPEG，加熱將其液化，然后加入頭料。</span></p><p><span>4.氮氣置換；</span></p><p><span>5.溫度升到75-85℃，開(kāi)始滴加引發(fā)劑，在80℃1.5-2h滴加完畢。</span></p><p><span>6.待引發(fā)劑滴加完畢，在80-90℃保溫4-4.5小時(shí)，結束反應，降溫。</span></p><p><span>7.待溫度降至40-50℃，加入50%KOH溶液中和至PH：7-8。</span></p><p><span>8.測定含固量后，根據所需固含量，加入計量好的軟水。</span></p><p><span>9.測定含固量合格后，放料。</span></p><p><span>經(jīng)過(guò)上面的實(shí)驗，我們可以得到混凝土用減水劑的基礎配方：</span></p><p><span>混凝土用減水劑配方1：</span></p><p><span>丙烯酸羥乙酯:25g，丙烯酰胺:5g，烯丙基聚氧乙烯醚:175g，過(guò)硫酸鈉:10g，氫氧化鈉中和。</span></p><p><span>混凝土用減水劑配方2：</span></p><p><span>烯丙基聚氧乙烯醇醚:40g，丙烯酸單體:30g，10%過(guò)硫酸銨水溶液40g，三乙醇胺中和。</span></p><p><span>混凝土用減水劑配方3：</span></p><p><span>烯丙基聚氧乙烯醇醚:100g，甲基丙烯酸:70g，丙烯酸:20g，10%過(guò)硫酸銨水溶液:50g，氫氧化鈉中和。</span></p><p><span>混凝土用減水劑配方4：</span></p><p><span>甲基丙烯酸:25g：，烯丙基聚氧乙烯醚:175g，過(guò)硫酸鈉:10g。，氫氧化鈉中和。</span></p><p><span>混凝土用減水劑配方5：</span></p><p><span>TPEG:180g，雙氧水:0.63g，巰基乙酸:0.56g，抗壞血酸:0.3g，丙烯酸:182.3g，氫氧化鈉中和。</span></p><p><span>混凝土用減水劑配方6：</span></p><p><span>APEG:180g，雙氧水:10g，巰基乙酸:2.07g，衣康酸:10g，甲基丙烯酸:21.23g，氫氧化鈉中和。</span></p><p><span>以上僅供參考，如需更多，可以找專(zhuān)業(yè)的混凝土減水劑配方及成分分析檢測機構，提供混凝土減水劑，混凝土添加劑配方還原，混凝土聚酸減水劑成分分析，混凝土用減水劑配方剖析，混凝土減水劑的配比，減水劑配方解密，混凝土減水劑成分分析，砼減水劑成分化驗，混凝土減水劑原料鑒定等都可以來(lái)詢(xún)我們知弗，可以為你精準剖析出樣品中的各個(gè)原料的化學(xué)名稱(chēng)和含量大概比例，為您生產(chǎn)提供技術(shù)幫助，甚至可以為你開(kāi)發(fā)樣品的配制方法。</span></p> 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