| dc.description.abstract | This research devoted in looking to the most appropriate proportion of
making modified artificial aggregates, to investigate the suit resource usage strategies in concrete and mortar specimens. According to research content enforcement procedures can be divided into three experimental phase; decided the best solidify proportion of the modified artificial aggregates, Mixing using analysis various materials between the nature and mortar and concrete production.
The results show : (1) when being mixed with the proportion of 0.44 w/c, 1.1 cement/cake and 50% slag for cake solidify has the best strength performance. (2) The chloride ion content of the modified artificial aggregates have been lower than specification, and has low specific gravity, high water absorption properties but the durability is less than the natural aggregates, appropriate use of mortar and concrete have less affected on the properties of the specimen. (3) The Hualien sand compared to the other origin of natural aggregates, have the best performance both in terms of activity, basic properties and strength of mortar. (4) Using MLS as a superplasticizer, which can effectively improve the workability and strength decreased as a result of using the modified artificial aggregates. (5) In the mortar test, while modified artificial aggregates replace the higher the percentage, the mortar performance will be worse , but use lower fineness modulus(2.3~2.7), mortar workability and strength have better advantageous. (6) Due to modified Artificial aggregates to show irregular-shaped particles, in concrete test, when particle size and replaced amount increased ,will reduce workability and strength. When to replace the coarse sand, fine sand and Coarse aggregates then order of selection 0.8,0.7 and 0.7 w/c ,the strength of the 28 days could reach 210 kgf/cm2.
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