In general, building materials exposed to the marine environment are more prone to deteriorates than others. There are three main zones of the marine environment named atmospheric zone, tidal zone and submerged zone. This article investigated the effect of different curing conditions named water curing, air curing, seawater curing and wet/dry curing on the compressive strength and microstructure properties of alkali-activated slag (AAS) pastes with and without microsize metakaolin (mK) particles over a period of up to one year. The wet/dry curing was used to simulate the effect of the tidal zone, of which the specimens were submerged in seawater for 18 h followed by 6 h of air drying per day. The slag was partially replaced with mK at ratios fluctuated from 0 to 12% with a step of 2%, by weight. A fixed concentration of sodium silicate was used as an alkaline activator. After initial curing, the specimens were exposed to the aforementioned treatment conditions for 3, 6 and 12 M. The phase composition and microscopic structure of the neat AAS and AAS/mK samples were tested by X-ray diffraction (XRD), thermogravimetric analysis (TGA/DTG) and scanning electron microscopy (SEM). The results showed that the deterioration in the specimens exposed to the simulated tidal zone is more severe than those submerged in seawater. The neat AAS pastes showed better strength and microstructure than those blended with mK.

一般来说，暴露在海洋环境中的建筑材料比其他材料更容易变质。海洋环境分为大气区、潮汐区和淹没区三个主要区域。本文研究了水固化、空气固化、海水固化和湿/干固化等不同固化条件对含有和不含微尺寸偏高岭土 (mK) 颗粒的碱活化渣 (AAS) 糊料的抗压强度和微观结构性能的影响。期限最长为一年。湿/干固化用于模拟潮汐带的影响，其中将试样浸入海水中 18 小时，然后每天风干 6 小时。炉渣部分被 mK 替代，比例从 0 到 12% 波动，步长为 2%（按重量计）。固定浓度的硅酸钠用作碱性活化剂。初步固化后，将样品暴露于上述处理条件下 3、6 和 12 M。通过 X 射线衍射 (XRD)、热重分析 (XRD) 测试纯 AAS 和 AAS/mK 样品的相组成和微观结构TGA/DTG) 和扫描电子显微镜 (SEM)。结果表明，暴露在模拟潮汐带中的样品比淹没在海水中的样品恶化更严重。纯 AAS 糊剂显示出比与 mK 混合的那些更好的强度和微观结构。通过 X 射线衍射 (XRD)、热重分析 (TGA/DTG) 和扫描电子显微镜 (SEM) 测试了纯 AAS 和 AAS/mK 样品的相组成和微观结构。结果表明，暴露在模拟潮汐带中的样品比淹没在海水中的样品恶化更严重。纯 AAS 糊剂显示出比与 mK 混合的那些更好的强度和微观结构。通过 X 射线衍射 (XRD)、热重分析 (TGA/DTG) 和扫描电子显微镜 (SEM) 测试了纯 AAS 和 AAS/mK 样品的相组成和微观结构。结果表明，暴露在模拟潮汐带中的样品比淹没在海水中的样品恶化更严重。纯 AAS 糊剂显示出比与 mK 混合的那些更好的强度和微观结构。