不同钡掺量硫铝酸钡钙矿物结构及其水化  

Mineral structure and hydration of calcium barium sulphoaluminate with different barium mixing amounts

作　　者：尚小朋 常钧[1] 房延凤[1] 张洋洋[1] 

机构地区：[1]大连理工大学土木工程学院,辽宁大连116024

出　　处：《大连理工大学学报》2017年第2期142-147,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(51472041)

摘　　要：通过Ba^(2+)取代硫铝酸钙(C4A3-S)矿物中的Ca2+制备出胶凝性能优良的硫铝酸钡钙(C_(4-x)B_xA_3-S)矿物.选取了19个不同钡掺量的生料,在1 400℃条件下保温3h烧成不同的C_(4-x)B_xA_3-S矿物,并分析了钡掺量对C_(4-x)B_xA_3-S水化性能的影响.通过XRD Rietveld全谱拟合方法对熟料中的矿物种类和含量进行定量计算,并对C_(4-x)B_xA_3-S的晶体结构进行精修,分析了C_(4-x)B_xA_3-S中的实际钡含量和Ba^(2+)利用率.结果表明,随着钡掺量的增加,C_(4-x)B_xA_3-S的含量先增加后减少,在钡掺量为0.6 mol时达到最大,C_(4-x)B_xA_3-S的含量为93.2%.C_(4-x)B_xA_3-S矿物中的实际钡含量和Ba^(2+)利用率均随钡掺量的增加呈现出先增加后减少的趋势,钡掺量在0.4mol时合成了C3.61B0.39A3-S,Ba^(2+)利用率达到97.5%.并且随着钡掺量的增加C_(4-x)B_xA_3-S的晶面间距逐渐增大.C_(4-x)B_xA_3-S水化后的抗压强度随着钡掺量的增加逐渐增大,但当钡掺量超过1.4mol时,由于膨胀导致强度下降,最终试块胀裂.C4 - XB：A 3 S mineral with excellent gelling property can be prepared by replacing the Ca2 ＋ in C4 A 3 S mineral with Ba2＋. Raw materials w ith 19 dif ferent barium mixing amounts condition of 1 400 ℃ for 3 h to get dif ferent C4 - XBXA 3S minerals and the eamounts on hydrationperformances ofC 4- x B： A 3 S minerals is investigated. Quantitative calculation ofmineral species and content of clinkers and C4 ] Bi A 3 S minerals crystal structure refinement are performed by XRD Rietveld whole pattern f i t t ing . Actual barium amounts in C4SxBxA 3 S minerals and Ba2＋ utilization percentage are analyzed. Experimental results show th a tC 4- x Bx A 3 S content f irs t ly increases and then decreases with increasing barium mixing amount, and when barium mixing amount is 0. 6 mol, C4- xBxA 3 S mineral content arrives maximum （93. 2 % ）. Actual barium amount and Ba2 ＋ utilization percentage f irst ly increase and then decrease w ith increasing barium mixing amount, andwhen barium mixing amount is 0. 4 mo l,C3 . 61 B0. 39 A 3 S is prepared and the Ba2＋ utilization percentage is 97. 5%. With the increasing of barium mixing amount, the interplanar crystal spacing ofC4 - xBxA 3 S minerals increases gradually. The compressive strength of C4 - x Bx A 3 S after hydrationincreases with increasing barium mixing amounts,however,i t decreases when barium mixing amount is more than 1. 4 mol due to the expansion,and finally cracks are observed.

关 键 词：硫铝酸钡钙矿物 钡掺量 Ba2+利用率 晶面间距 水化 

分 类 号：TU528[建筑科学—建筑技术科学]