| Summary: | 碩士 === 國立臺灣大學 === 土木工程學研究所 === 101 === Because of the changes of earth environment, the carbon emissions have to reduce. One of the way to reduce the use of carbon emissions is alternative sources of aggregates based on waste materials. And Taiwan is a small island which has lots of mountain, so the reservoir has a huge amount of silt deposition. The purpose of this research is based on using reservoir silt as a source of concrete aggregate. Using a variety of analyzing methods, characteristics of reservoir silt may be established to make the utilization of reservoir silt more cost efficiency.
This research studied the effect of reservoir silt on concrete mechanical properties, including compressive strength, static elastic modulus, drying shrinkage, RCPT test, and standard test method for abrasion resistance of concrete (underwater method). The mixtures consider many factors, including water/cementitious material ratio, the reservoir silt replacement level, and different types of reservoir silt and cement, there are total 23 mixtures. The types of silt source including Shihmen reservoir and Baiha reservoir; and the types of cement including I type Portland cement and HSS. HSS is combined with I type Portland cement and slag, the proportion of cement and slag is 3:7, so this study also has discussed slag.
Experimental results show that it is feasible about reservoir silt concrete. Unless drying shrinkage, the strength and durability of reservoir silt concrete are available range.
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