Mechanical and microstructural properties of heat cured alkali-activated slag mortars
Mechanical and microstructural properties of heat cured alkali-activated slag mortars
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DOI：
10.1016/j.matdes.2011.10.005
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发表时间：
2012-03-01
影响因子：
8.4
通讯作者：
Baradan, Bulent
中科院分区：
文献类型：
--
作者：
Aydin, Serdar;Baradan, Bulent
研究了蒸养和蒸压养护对碱矿渣砂浆力学性能和微观结构的影响。采用氢氧化钠和硅酸钠的混合物，在不同Na 2 O和M-s（SiO2/Na 2 O）比下对矿渣进行活化。试验结果表明，蒸压养护条件下，低碱量矿渣水泥砂浆具有较好的孔径分布和较高的矿渣水化率，有利于形成较好的微观结构。在压蒸养护条件下掺入2%Na2O，抗压强度可达70 MPa。然而，蒸汽养护表现出类似的机械性能与蒸压养护的AAS砂浆激活的高M-s值的解决方案。这两种养护方法在降低AAS砂浆的干燥收缩方面都是显着有效的。(C)2011爱思唯尔有限公司保留所有权利。
The effects of steam and autoclave curing on the mechanical properties and microstructure of alkali activated slag mortars (AAS) were investigated within the scope of this study. Slag was activated by the mixtures of sodium hydroxide and sodium silicate, in different Na2O and M-s (SiO2/Na2O) ratios. Test results showed that high strength mortars can be produced with very low alkali content under autoclave curing as a result of better pore size distribution, higher rate of hydrated parts of slag grains which leads to a better microstructure formation. A compressive strength value of 70 MPa has been reached by incorporation of 2% Na2O under autoclave curing. Nevertheless, steam curing presents similar mechanical performance with autoclave curing for AAS mortar activated by the solutions with high M-s values. Both curing methods were significantly effective in terms of reducing drying shrinkage of AAS mortars. (C) 2011 Elsevier Ltd. All rights reserved.