針對(duì)預(yù)制構(gòu)件混凝土的聚羧酸醚類外加劑的研究與應(yīng)用（上）
2006-02-24 00:00
摘 要：針對(duì)預(yù)制構(gòu)件混凝土，我們開發(fā)了新的聚羧酸醚( PCE) 高效減水劑和混凝土強(qiáng)度增強(qiáng)劑。后者在加速混凝土早期強(qiáng)度發(fā)展的同時(shí)，對(duì)混凝土3d ，7d 乃至28d 強(qiáng)度都有明顯提高。結(jié)合這兩項(xiàng)新成果及適當(dāng)?shù)膹?fù)配技術(shù)，我們針對(duì)蒸養(yǎng)和免蒸養(yǎng)預(yù)制構(gòu)件混凝土分別開發(fā)了系列新的外加劑產(chǎn)品。部分產(chǎn)品已在實(shí)際生產(chǎn)中得到應(yīng)用。
關(guān)鍵詞：預(yù)制構(gòu)件； 聚羧酸醚； 混凝土強(qiáng)度增強(qiáng)劑； 早強(qiáng)； 蒸汽養(yǎng)護(hù)
Study and appl ication of PCE- based admixture on pre-cast concrete
YA N G Jian2ying ， S ven M. F. Asmus
(Degussa Construction Chemicals Asia Pacific ，Shanghai 201108 ，China)
Abstract ： With a focus on pre-cast concrete， a new PCE polymer and a new concrete strength enhancer were synthesized and developed ，respectively. This concrete strength enhancer contributes not only to early but also middle and later age concrete strength. Combining these two new innovation as well as advanced admixture technology ，a series of new products were developed ，some of which have been successfully applied in practice.
Key words ： pre2cast concrete ； PCE； concrete strength enhancer ； early strength ； steam curing
1 引言
預(yù)制構(gòu)件和鋼筋混凝土在19 世紀(jì)末就已在建筑結(jié)構(gòu)中得到應(yīng)用。進(jìn)入20 世紀(jì)中期，隨著預(yù)制構(gòu)件制造和施工技術(shù)的不斷發(fā)展，以及高效減水劑的問世，?