Development of high strength concrete without Portland cement

2015 Fiscal Year Final Research Report

• Project/Area Number: 23560547
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Utsunomiya University
• Principal Investigator: Fujiwara Hiromi 宇都宮大学, 工学(系)研究科(研究院), 教授 (30323314)
• Co-Investigator(Kenkyū-buntansha): MARUOKA Masanori 宇都宮大学, 大学院工学研究科, 准教授 (50323316)
• Research Collaborator: SAITOH Kaname 日本シーカ, テクノロジーセンター, グループマネージャー ; NITO Nobukazu デイ・シイ, 技術部
• Project Period (FY): 2011-04-28 – 2016-03-31
• Keywords: 環境負荷低減 / 高強度コンクリート / 耐凍害性 / 高炉スラグ微粉末 / フライアッシュ / 産業副産物

Outline of Final Research Achievements

This research is regarded about environmental loading reduction type high strength concrete using large amount of blast furnace slug fine powder and fly ash as the main reactive material. And we tried to improvement about harden concrete properties of freezing and thawing resistance, and fresh properties of fluidity with some experiments.
Results of these experiments, we got better combinations of powder materials, and mix proportions of concrete to product the high strength concrete over 100 N/mm2, and to be able to product over 60 N/mm2 high strength concrete without expensive material such as silica fume. We improved properties of freezing and thawing resistance, decreasing entrapped air volume with deformer, and increasing entrained air with AE agent, then air content volume ratio up to about 6 %. . About fresh properties, we adjusted the gradation of use powder materials, then we discovered method to control dilatancy characteristics of the concrete.

Free Research Field

建設材料，コンクリート工学