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Optimized mix design of rapid-set lightweight-formed mortar for backfill
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굴착복구용 속경성 경량기포 시멘트 모르타르의 최적 배합 도출을 위한 기초 물성 연구

논문 기본 정보

Type
Academic journal
Author
An, Ji-Hwan (한국건설기술연구원) Jeon, Sung-il (한국건설기술연구원)
Journal
Korean Society of Road Engineers 한국도로학회논문집 한국도로학회논문집 제19권 제1호 KCI Accredited Journals
Published
2017.1
Pages
1 - 9 (9page)

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Optimized mix design of rapid-set lightweight-formed mortar for backfill
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Abstract· Keywords

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PURPOSES : The objective of this study is to develop an optimized method of mix design for rapid-set lightweight-formed mortar mix. To achieve this objective, the workability, setting time, and compressive strength of mixes under various conditions of mix design were evaluated. METHODS : The water-bonder ratio, fly-ash substitution ratio, and forming agent injection amount were selected as design variables in the study. The fluidity, setting time, density, and strength of the mortar mix were considered as major evaluation criteria of the mixture, and were subsequently utilized to evaluate the characteristics of the mortar mix under various conditions. RESULTS : The observations made from the mix design process are as follows: 1) the air content and fluidity increase as the forming agent ratio and forming agent ratio increase, respectively; 2) the maximum air content is approximately 20%; 3) the accelerating agent decreases the fluidity of the mortar mix by 15% on average; 4) the forming agent injection ratio and fly-ash substitution ratio yield significant effects on the initial and final set times of the mortar mix; 5) as the forming agent injection ratio and fly-ash substitution ratio increase, the compressive strength of the mortar mix decreases; and 6) the 28-day compressive strengths of the forming agent injection ratio and fly-ash substitution ratio yield the most significant effects. CONCLUSIONS : It is concluded that the governing design variables for the rapid-set lightweight-formed mortar mix are the forming agent injection ratio and fly-ash substitution ratio.
#Controlled Low-Strength Materials #CLSM #Rapid-Set Lightweight-Formed Mortar #Fly Ash #Backfill

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References (15)

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ACI / 2013 / Report on Controlled Low-Strength Materials google schola 2004 / Civil engineering works standard specification / Korea Society of Civil Engineering google schola 한우진 / 2015 / 양생시간에 따른 CLSM의 압축강도 및 압축파 속도 상관성 연구 / 한국지반환경공학회 논문집 16(11):5~11 dbpia Howard, A. K. / 1997 / The Design and Application of Controlled Low-Strength Materials(Flowable Fill) / ASTM STP 1331, Symposium on the Design and Application of CLSM google schola Kevin J. F. / 2008 / Development of a Recommended Practice for Use of Controlled Low-Strength Material in Highway Construction google schola

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