| Summary: | 碩士 === 國立臺北科技大學 === 土木與防災研究所 === 100 === The main object of this study is the discussion of slag and slag powder, the waste material produced with iron-smelting, applied to cement mortar. Testing on properties such as compression strength, tensile strength, time of setting, bleeding, shrinkage test and flow test were conducted according to the codes : American Society for Testing and Material (ASTM) and China National Standards (CNS). Different cement-replacement proportions: 10%, 20%, 40% and 60% were designed for the tests and each cement-replacement proportions could be divided into using pure slag powder and using slag mixing slag powder as: 25% slag powder, 50% slag powder and 75% slag powder.
The test results show that the cement mortar specimens exhibited the higher compression strength with an elder age when the slag powder was used to the cement replacement. Among the different cement-replacement proportions, specimen of 20% performed better than others specimens. The comparison of the use of slag mixing slag powder with equal replaced proportions indicated that the compression strength increased followed the using amount of the slag powder. Moreover, there was the swelling nature in the slag for the inhibition of the drying shrinkage.
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