| Summary: | 碩士 === 國立臺灣大學 === 土木工程學研究所 === 105 === This is the first time that plastic concrete is used in Taiwan’s engineering this years, so the domestic cognition of this materials is not popular, such as its high water ratio and lower elastic modulus requirements are subverted in the general knowledge of concrete. For the possibility to construct the dam, which will have a cut-off wall works, it is necessary to study more on plastic concrete in the future.
We investigate the property of concrete after adding bentonite in this paper, and our objective is to meet the engineering specification. It contains the fresh and hardening properties of the concrete includes the slumps test, the elastic modulus test, the penetration test, shrinkage test, which need to take into account the factors of water-cement ratio, bentonite replacement rate and the type of bentonite. At the first by the cement mortar to start the experiment, get a general trend then continue the experiment on plastic concrete. The study is the use of type Ⅱ cement, which is concerned about the environment may cause damage to concrete, and bentonite in this study using Hydorgel (H bentonite) and Bentonil API (A bentonite) to compare the properties with different types of bentonite.
In order to reduce the use of cement, we chose slag which is easy to get in Taiwan to replace cement. The other benefit is that engineering qualification can be achieved. We wish the replacement of pozzolanic material could lower the CO2 emissions, and makes plastic concrete more environmental friendly.
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