A rapid and reliable performance test will enable fast and suitable selection of binder for each service environment. In order to evaluate the possibility of using smaller specimens to accelerate the sulphate resistance tests, Portland cement mortar specimens of sizes 20 × 20 × 160 mm, 25 × 25 × 280 mm and 40 × 40 × 160 mm were continuously immersed in 50 g/l sodium sulphate solution and various physical and microstructural characteristics were evaluated at different ages. Additionally, the depth of deterioration and the alteration in binder chemistry was investigated using microCT scan and SEM-BSE along with EDX analysis. The XRD pattern confirms that expansion of specimen is related to the fraction in the cross section altered by the formation of ettringite and gypsum. The expansion and evolution of flexural strength showed a close correlation, notwithstanding a concurrence between the depth of deterioration and evolution of dynamic modulus. This paper discusses the relevance or possibility of using various test methods and their consistency in sulphate attack measurements. The investigation shows that smaller specimens can be considered as a means to accelerate the typical immersion test method for sulphate attack.

快速而可靠的性能测试将使您能够针对每种服务环境快速，适当地选择粘合剂。为了评估使用较小样品加速耐硫酸盐测试的可能性，将尺寸为20×20×160 mm，25×25×280 mm和40×40×160 mm的波特兰水泥砂浆样品连续浸入50 g /分别评估了不同年龄的硫酸钠溶液以及各种物理和微观结构特征。此外，使用microCT扫描和SEM-BSE以及EDX分析研究了变质深度和粘结剂化学变化。X射线衍射图证实样品的膨胀与钙矾石和石膏的形成所改变的横截面的分数有关。弯曲强度的扩展和演变显示出密切的相关性，尽管在劣化的深度和动态模量的演变之间同时存在。本文讨论了在硫酸盐侵蚀测量中使用各种测试方法的相关性或可能性以及它们的一致性。调查表明，较小的标本可以被认为是加快硫酸盐侵蚀的典型浸没测试方法的一种方法。