| 尚小朋,常钧,房延凤,张洋洋.不同钡掺量硫铝酸钡钙矿物结构及其水化[J].,2017,57(2):142-147 |
| 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 |
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| DOI：10.7511/dllgxb201702005 |
| 中文关键词: 硫铝酸钡钙矿物 钡掺量 Ba 2+ 利用率 晶面间距 水化 |
| 英文关键词: calcium barium sulphoaluminate mineral barium mixing amount Ba 2+ utilization percentage interplanar crystal spacing hydration |
| 基金项目:国家自然科学基金资助项目(51472041). |
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| 中文摘要: |
| 通过Ba 2+ 取代硫铝酸钙(C 4A 3 AS-U )矿物中的Ca 2+ 制备出胶凝性能优良的硫铝酸钡钙(C 4- x B x A 3 AS-U )矿物．选取了19个不同钡掺量的生料，在1 400 ℃条件下保温3 h 烧成不同的C 4- x B x A 3 AS-U 矿物，并分析了钡掺量对C 4- x B x A 3 AS-U 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 x A 3 AS-U 的晶体结构进行精修，分析了C 4- x B x A 3 AS-U 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 x A 3 AS-U 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 x A 3 AS-U 的含量为93.2%．C 4- x B x A 3 AS-U 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0.4 mol时合成了C 3.61 B 0.39 A 3 AS-U ，Ba 2+ 利用率达到97.5%．并且随着钡掺量的增加C 4- x B x A 3 AS-U 的晶面间距逐渐增大．C 4- x B x A 3 AS-U 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1.4 mol时，由于膨胀导致强度下降，最终试块胀裂． |
| 英文摘要: |
| C 4- x B x A 3 AS-U mineral with excellent gelling property can be prepared by replacing the Ca 2+ in C 4A 3 AS-U mineral with Ba 2+ . Raw materials with 19 different barium mixing amounts are sintered in condition of 1 400°C for 3 h to get different C 4- x B x A 3 AS-U minerals and the effect of barium mixing amounts on hydration performances of C 4- x B x A 3 AS-U minerals is investigated. Quantitative calculation of mineral species and content of clinkers and C 4- x B x A 3 AS-U minerals crystal structure refinement are performed by XRD Rietveld whole pattern fitting. Actual barium amounts in C 4- x B x A 3 AS-U minerals and Ba 2+ utilization percentage are analyzed. Experimental results show that C 4- x B x A 3 AS-U content firstly increases and then decreases with increasing barium mixing amount, and when barium mixing amount is 0.6 mol, C 4- x B x A 3 AS-U mineral content arrives maximum (93.2%). Actual barium amount and Ba 2+ utilization percentage firstly increase and then decrease with increasing barium mixing amount, and when barium mixing amount is 0.4 mol, C 3.61 B 0.39 A 3 AS-U is prepared and the Ba 2+ utilization percentage is 97.5%. With the increasing of barium mixing amount, the interplanar crystal spacing of C 4- x B x A 3 AS-U minerals increases gradually. The compressive strength of C 4- x B x A 3 AS-U after hydration increases with increasing barium mixing amounts, however, it decreases when barium mixing amount is more than 1.4 mol due to the expansion, and finally cracks are observed. |
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