| Summary: | 碩士 === 國立交通大學 === 土木工程系 === 89 === The major aim of the study is to explor the effect that under the different conditions and ages, the hydration products and the void of the hydration products and aggregate contact layer. To measure the loss of combustion by TGA, and to determine the degree of hydration and the contents of Ca(OH)2 ; observing SEM for morphological and cross section profile features by using stereoscope and parallax ruler to understand the change process of the morphological thickness. Analysing the composition of the hydration products by EDS, and the length of C-S-H gels by NMR to determine the microstructure of interface weave.
The research result shows: the initial process of hydration between 100μm aggregate contact layer, this is intermittent growth. At first, the void is thick lump at initial time, then become indefinite, smaller, thin lump. Relying on the stereograph, at the 25μm interval between the border of the aggregate, the thick of hydration products increased by adding the distance from the aggregate. In the range of 25μm , there are more pellet cement not or not yet to hydration, and to become lump morphological profile features CH at initial hydration process; by adding the ages of hydration, it produces more AFt and AFm. The C-S-H(III) and crystallize CH gradually to replace of the AFt and AFm stick to the border of aggregate exsited porosity, and by the ages growthful, the loose structure metamorphose densely.
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