本文選題：應(yīng)變硬化水泥基復(fù)合材料　切入點：掃描電鏡　出處：《河北工業(yè)大學(xué)學(xué)報》2014年06期

【摘要】：對水泥漿基材進(jìn)行改性是提升應(yīng)變硬化水泥基復(fù)合材料(SHCC)力學(xué)性能的一個重要手段.本文利用粉煤灰對SHCC膠凝體系進(jìn)行改性,改善了PVA橋聯(lián)功能和SHCC的力學(xué)性能.并利用掃描電鏡(SEM)和電子探針(EDS)等方法分析纖維-水泥漿界面區(qū)(ITZ)的結(jié)構(gòu)和產(chǎn)物.試驗結(jié)果表明PVA纖維與水泥漿結(jié)合較緊密,阻礙了多重開裂的產(chǎn)生;而粉煤灰的加入可以明顯改善FA-SHCC的直拉和彎曲性能;對ITZ的EDS觀測發(fā)現(xiàn)粉煤灰的加入可以改變SHCC的ITZ水化產(chǎn)物和微觀結(jié)構(gòu),提高了橋聯(lián)作用,改善了力學(xué)性能.
[Abstract]:The modification of cement slurry is an important means to improve the mechanical properties of strain hardening cement matrix composites. In this paper, fly ash is used to modify the SHCC cementing system. The bridging function of PVA and the mechanical properties of SHCC were improved. The structure and the products of the fiber-cement slurry interface region were analyzed by SEM and EDS. The results showed that the PVA fiber was closely bound to the cement slurry. The addition of fly ash can obviously improve the Czochralski and flexural properties of FA-SHCC. The EDS observation of ITZ shows that the addition of fly ash can change the hydration products and microstructure of SHCC ITZ and improve the bridging effect. The mechanical properties are improved.
【作者單位】： 青島理工大學(xué)土木工程學(xué)院;青島理工大學(xué)藍(lán)色經(jīng)濟(jì)區(qū)工程建設(shè)與安全協(xié)同創(chuàng)新中心;
【基金】：國家自然科學(xué)基金(51378269,51178230) 青島市科技計劃項目(13-1-4-176-jch) 高性能土木工程材料國家重點實驗室開放基金(2013CEM010)
【分類號】：TU528

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本文編號：1655032