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잔골재 중 토분이 모르타르의 기초적 특성에 미치는 영향
신세준 ( Sin Se-jun ),이제현 ( Lee Jea-hyeon ),박경택 ( Park Kyung-teak ),박민용 ( Park Min-yong ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2
Recently, the supply and demand of aggregates has become difficult due to various practical constraints such as depletion of natural aggregate resources and tightening environmental regulations. As a result, aggregates such as selective crushed aggregates and river aggregates are now distributed to the construction market. In particular, among the aggregates distributed in the country, selective crushed aggregates that have been used recently are characterized by the fact that the quality of the raw material is not uniform and is based on geological characteristics. Such bad aggregates can affect the overall performance of the concrete and shorten the life of the structure. Therefore, in this study, in order to improve such problems, we want to analyze the effect of aggregate powder on mortar.
굵은골재 중 토분이 콘크리트의 기초적 특성에 미치는 영향
신세준 ( Sin Se-jun ),이제현 ( Lee Jea-hyeon ),박경택 ( Park Kyung-teak ),박민용 ( Park Min-yong ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2
As the aggregate supply and demand shortages in Korea due to the lack of aggregates due to the regulation of production and use conditions of domestic aggregate collectors, the media recently pointed out the distribution of so-called bad aggregates containing soil powder. Such poor aggregates have a high self-absorption rate according to the reference, etc., leading to a decrease in the fluidity of the concrete. Therefore, in order to secure fluidity, the unit quantity increases greatly from 30 kg/㎥ to 55 kg/㎥, and the increased unit yield eventually leads to a decrease in compressive strength, resulting in a decrease in strength from about 35 % to 45 % compared to general aggregates. It indicates that there is a risk of shortening the life of the structure. Therefore, this study aims to analyze the effect of aggregate soil on concrete.
잔골재 중 토분이 저강도 모르타르의 기초적 특성에 미치는 영향
신세준 ( Sin Se-jun ),이제현 ( Lee Jea-hyeon ),박경택 ( Park Kyung-teak ),박민용 ( Park Min-yong ),한민철 ( Han Min-cheol ),한천구 ( Han Cheon-goo ) 한국건축시공학회 2019 한국건축시공학회 학술발표대회 논문집 Vol.19 No.2
Recently, the use of selective crushed aggregates is increasing due to the supply and demand shortage of aggregates. In the case of selective crushed aggregates, aggregates are produced using soil, rocks, etc., mainly generated at construction sites as raw materials. As a result, the quality of the raw material may not be uniform and may contain a large amount of soil. In the case of using such a bad aggregate shortens the life of the structure, there is a fear that adversely affect the overall performance, such as the strength and durability of the concrete. Therefore, this study analyzes the effect of aggregate soil on mortar in the low-strength mortar and ultimately proposes the regulation value of clay content in the soil content of crushed aggregates such as crushed aggregates.