|
Title |
Mechanical Properties and Durability of Concrete in Relation to the Amount of Limestone Use
|
|
Authors |
오성우(Sungwoo Oh) ; 신동철(Dongcheol Shin) |
|
DOI |
https://doi.org/10.11112/jksmi.2017.21.3.138 |
|
Keywords |
석회석미분말 ; 압축강도 ; 내구성 ; 공극률 ; 혼합시멘트 Limestone ; Porosity ; Carbonation ; Drying shrinkage |
|
Abstract |
In order to reduce carbon dioxide emission in construction industry, less amount of cement use can be one of the alternatives to manufacture concrete. One of the non-sintered construction materials are limestone, which is the raw material to manufacture ordinary Portland cement(OPC). A large amount of limestone have already been used as binders such as blended cement in Europe and US. Even European countries were already established the standard of blended cement, where the limestone can be used up to 35 percent. In this study, experimental researches were conducted to investigate the effects of limestone replacement on the mechanical properties and durability of concrete with 15%, 25% and 35% of limestone substitution to use limestone in blended cement. 15 percent use of limestone in blended cement developed equivalent or even higher compressive strengths compared to Plain mixture. Porosity of limestone cement with 15 percent substitution was much lower than Plain mixture. Most durability tests such as concrete carbonation, freeze-thaw cycle and drying shrinkage strains were conducted to evaluate long-term performance, and the test results indicated that 15 percent of limestone use did not significantly influence on the concrete durability compared with plain concrete.
|