Cement Recycling System Using Sodium Gluconate

• Project/Area Number: 25870221
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Civil engineering materials/Construction/Construction management; Composite materials/Surface and interface engineering
• Research Institution: Shimane University (2015); Tokyo Institute of Technology (2013-2014)
• Principal Investigator: ATARASHI DAIKI 島根大学, 総合理工学研究科(研究院), 准教授 (70431393)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: セメント / 戻りコンクリート / スラッジ水 / 凝結遅延剤 / グルコン酸ナトリウム / コンダクションカロリーメーター / 水和反応 / 残存セメント量 / コンダクションカロリ－メーター

Outline of Final Research Achievements

The objective of this research was to develop a method for the rapid estimation of the quantity of residual cement in sludge water and to control its hydration reaction using sodium gluconate in order to enable the residual cement in sludge water to be effectively utilized. The quantity of residual cement in sludge water can be estimated by measuring the heat of hydration liberated in 24 h using a conduction calorimeter. And the hydration of cement with comb-type superplasticizer was retarded by addition of sodium gluconate. So we can consider that sodium gluconate is also effective to control the hydration of alite with superplasticizer in sludge water. It is possible to recommence sodium gluconate-controlled cement hydration using magnesium nitrate. A method was developed to simulate the rate of the hydration reaction, which makes it possible to estimate the quantity of residual cement in sludge water by measuring the rate of heat liberation of hydration over 10 h.

Research Products

• [Journal Article] Cement Recycling System Using Sodium Gluconate (2015)
  • Author(s): D.Atarashi, Y.Aikawa, Y.Yoda, M.Miyauchi and E.Sakai
  • Journal Title: Proceedings of the 11th CANMET/ACI International Conference Superplasticizers and other chemical admixtures in concrete (ACI SP-302) Volume: 1 Pages: 437-448
  • Peer Reviewed
• [Journal Article] Influence of Molucular Structure of Superplasticizer on the Fluidity Change of Cement in Early Hydration (2015)
  • Author(s): Y.Ohtsuka, D.Atarashi, M.Miyauchi and E.Sakai
  • Journal Title: Journal of Advanced Concrete Technology Volume: 13 Pages: 373-378
  • Peer Reviewed
• [Journal Article] Interaction between Montmorillonite and Chemical Admixture (2015)
  • Author(s): D.Atarashi, K.Yamada, A.Itoh, M.Miyauchi and E.Sakai
  • Journal Title: Journal of Advanced Concrete Technology, Volume: 13 Pages: 325-331
  • NAID: 130005084037
  • Peer Reviewed
• [Journal Article] Method for estimating quantity of non-hydrated cement in a cement recycling system (2015)
  • Author(s): D. Atarashi, T. Kamio, Y. Aikawa, M. Miyauchi, E. Sakai
  • Journal Title: J. Advanced Concrete Tech. Volume: 13 Pages: 44-49
  • NAID: 130004940160
  • Peer Reviewed / Open Access
• [Journal Article] スラッジ水中のセメントの水和反応に及ぼすグルコン酸ナトリウムの影響 (2014)
  • Author(s): 新大軌, 宋榮鎮, 宮内雅浩, 坂井悦郎
  • Journal Title: Cement Sci. and Concrete Tech. Volume: 68 Pages: 16-21
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] グルコン酸ナトリウムを用いたセメントリサイクルシステムにおける未水和セメント量の推定方法の確立 (2014)
  • Author(s): 新大軌，神尾哲治，相川豊，坂井悦郎
  • Journal Title: Cement Sci. and Concrete Tech. Volume: 67 Pages: 46-51
  • NAID: 130004745782
  • Peer Reviewed
• [Journal Article] Effective Method for Analysis of the Rate of Hydration of Portland Cement Based on Size Distribution (2014)
  • Author(s): Y.Aikawa, D.Atarashi and E.Sakai
  • Journal Title: J.Ceram.Soc.Japan Volume: 122 Pages: 93-95
  • NAID: 130004950902
  • Peer Reviewed
• [Presentation] Cement Recycling System Using Sodium Gluconate (2015)
  • Author(s): D.Atarashi, Y.Aikawa, Y.Yoda, M.Miyauchi and E.Sakai
  • Organizer: 11th CANMET/ACI International Conference Superplasticizers and other chemical admixtures in concrete (ACI SP-302)
  • Place of Presentation: Ottawa, Canada
  • Year and Date: 2015-07-12
  • Int'l Joint Research
• [Presentation] スラッジ水中のセメントの水和反応に及ぼす化学混和剤の影響 (2014)
  • Author(s): 新大軌，大塚雄太，宮内雅浩，坂井悦郎
  • Organizer: 第68回セメント技術大会講演要旨集
  • Place of Presentation: 東京
  • Year and Date: 2014-05-13 – 2014-05-15
• [Presentation] 分子構造の異なる分散剤がセメントペーストの流動性の経時変化と初期水和に及ぼす影響 (2014)
  • Author(s): 大塚雄太，新大軌，宮内雅浩，坂井悦郎
  • Organizer: 日本セラミックス協会2014年年会
  • Place of Presentation: 慶應義塾大学日吉キャンパス
• [Presentation] グルコン酸ナトリウムを用いたセメントリサイクルシステムにおける熱量測定による品質管理手法の提案 (2013)
  • Author(s): 神尾哲治，新大軌，宮内雅浩，坂井悦郎
  • Organizer: 第67回セメント技術大会
  • Place of Presentation: 池袋メトロポリタンビル