摘 要
磺酸系強塑劑添加入混凝土後常會有坍度損失的現象，因此如何改善此現象便成為一重要的研究課題。本研究合成二種共聚物PDA和PDAM作為混凝土的化學摻料。首先利用馬來酸酐和N,N-二甲基-1,3-丙二胺合成CDPA，再和氯醋酸鈉反應合成單體DAE，再和丙烯醯胺聚合得到PDA。另外由2-丙烯醯胺-2-甲基丙烷磺酸 ( AMPSA )、甲基丙烯酸 ( MAA ) 與DAE聚合得到PDAM。以FT-IR與1H-NMR確認合成之DAE及PDA、PDAM結構；利用GPC測定共聚物的分子量。
探討磺酸系強塑劑 (STF, M931) 與PDA及PDAM在不同比例混合下對水泥漿的流動性與混凝土的工作性的影響。研究結果顯示， PDAM5 (AMPSA : MAA : DAE = 5 : 5 : 1，Mw = 5.7 × 104) 會使水泥漿有最佳之初始坍度與坍度維持，其飽和劑量為0.8%。此外PDAM3與STF, M931混合時皆有相容性，當藥劑中PDAM3比例越高，水泥漿的初始流動性越佳且坍度損失也越少。以20% PDAM3取代STF添加於混凝土中，需要較低的劑量，便可使混凝土有同樣的混凝土工作性。

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