發(fā)布時(shí)間：2018-03-28 09:49

  本文選題：硫鋁酸鋇鈣礦物　切入點(diǎn)：鋇摻量　出處：《大連理工大學(xué)學(xué)報(bào)》2017年02期

【摘要】：通過Ba~(2+)取代硫鋁酸鈣(C4A3-S)礦物中的Ca2+制備出膠凝性能優(yōu)良的硫鋁酸鋇鈣(C_(4-x)B_xA_3-S)礦物.選取了19個(gè)不同鋇摻量的生料,在1 400℃條件下保溫3h燒成不同的C_(4-x)B_xA_3-S礦物,并分析了鋇摻量對(duì)C_(4-x)B_xA_3-S水化性能的影響.通過XRD Rietveld全譜擬合方法對(duì)熟料中的礦物種類和含量進(jìn)行定量計(jì)算,并對(duì)C_(4-x)B_xA_3-S的晶體結(jié)構(gòu)進(jìn)行精修,分析了C_(4-x)B_xA_3-S中的實(shí)際鋇含量和Ba~(2+)利用率.結(jié)果表明,隨著鋇摻量的增加,C_(4-x)B_xA_3-S的含量先增加后減少,在鋇摻量為0.6 mol時(shí)達(dá)到最大,C_(4-x)B_xA_3-S的含量為93.2%.C_(4-x)B_xA_3-S礦物中的實(shí)際鋇含量和Ba~(2+)利用率均隨鋇摻量的增加呈現(xiàn)出先增加后減少的趨勢(shì),鋇摻量在0.4mol時(shí)合成了C3.61B0.39A3-S,Ba~(2+)利用率達(dá)到97.5%.并且隨著鋇摻量的增加C_(4-x)B_xA_3-S的晶面間距逐漸增大.C_(4-x)B_xA_3-S水化后的抗壓強(qiáng)度隨著鋇摻量的增加逐漸增大,但當(dāng)鋇摻量超過1.4mol時(shí),由于膨脹導(dǎo)致強(qiáng)度下降,最終試塊脹裂.
[Abstract]:The excellent cementitious barium barium sulphoaluminate C4A3-S) minerals were prepared by replacing the Ca2 in the calcium sulphoaluminate (C4A3-S) minerals by Ba~(2. Nineteen raw materials with different barium content were selected and the different C_(4-x)B_xA_3-S minerals were sintered at 1 400 鈩，

本文編號(hào)：1675806