| 1. |
Yasutaka SAGAWA, Properties of concrete mixed with ground granulated blast-furnace slag
, National Taiwan University & Kyushu University Joint Workshop, 2024.03. |
| 2. |
Yasutaka SAGAWA, Recent Activities on Concrete Mixed with Mineral Admixture
, ISCEIE2022, 2022.08. |
| 3. |
Yasutaka SAGAWA, Recent guidelines and technical recommendations of mineral admixtures in Japan, JSCE-PII-MCA Joint Seminar (Online) Recent Advances and Practices of Concrete Materials, Structures, and Constructions in Indonesia, Japan, and Mongolia, 2021.03. |
| 4. |
Yasutaka SAGAWA, Significance and Estimation of Chloride Ion Diffusion Coefficient for Durable Concrete Structures, Conference on "Advanced Solutions in Civil Engineering and Transportation" Vietnam and Japan, 2015.06, Chloride ion diffusion coefficient in concrete is an important factor to predict resistance of concrete
structures for salt damage. First, in this study, the results of laboratory tests were presented. Because more effective
use of slag cement and ground granulated blast-furnace slag (GGBS) is expected from the viewpoint of recycling byproducts
and durability of concrete, the coefficient of the concrete mixed with GGBS was discussed. As the results,
GGBS reduced the effective diffusion coefficient of chloride ion ranging from 1/5 to 1/10. Also, GGBS with specific
surface area of 6000 cm2/g improved the chloride resistance of concrete when water to binder ratio (W/B) was was
smaller than 45%. Second, the application of GGBS with specific surface area of 6000 cm2/g to prestressed concrete
bridge was presented. The effective diffusion coefficient of the concrete used for bridge superstructure showed the
lower value.. |
| 5. |
Mohd Isneini, Yasutaka SAGAWA, Daisuke YAMAMOTO, Hidenori HAMADA, AN EXPERIMENTAL STUDY ON MITIGATING ALKALI SILICA REACTION BY USING EXPANDED PERLITE POWDER, 平成26年度土木学会西部支部研究発表会, 2015.03. |
| 6. |
Yasutaka SAGAWA, An Experimental Study on Chloride Ion Diffusion Coefficient of Concrete Mixed with Ground Granulated Blast-furnace Slag for Durability Improvement, Proceedings of the 2nd International Seminar on Infrastructure Development In Cluster Island Eastern Part of Indonesia (ISID 2014), 2014.06, More effective use of slag cement and ground granulated blast-furnace slag (GGBS) is expected from the viewpoint of recycling by-products and durability of concrete. In this study, chloride diffusion coefficient of the concrete mixed with GGBS was investigated. As the results, GGBS reduced the effective diffusion coefficient of chloride ion ranging from 1/5 to 1/10. Also, GGBS with specific surface area of 6000 cm2/g improved the chloride resistance of concrete when water to binder ratio (W/B) was was smaller than 45%. In addition, GGBS with specific surface area of 6000 cm2/g was applied to prestressed concrete bridge. The effective diffusion coefficient of the concrete used for bridge superstructure showed the lower value.. |
| 7. |
Adiwijaya, 濵田 秀則, 佐川 康貴, 山本 大介, Effects of Mix Proportions and Curing Conditions on Strength Performance of Seawater-Mixed Fly Ash Concrete, 第68回セメント技術大会, 2014.05. |
| 8. |
Hidenori Hamada, Takanori IKEDA, Yasutaka SAGAWA, Daisuke YAMAMOTO, An Observation of Strata System of Steel Corrosion Products by Fluorescence Microscope and Scanning Electron Microscope, NACE International East Asia & Pacific Rim Area Conference & Expo 2013, Kyoto, Japan, 2013.11. |
| 9. |
Daisuke YAMAMOTO, Yasutaka SAGAWA, Hidenori Hamada, Rita IRMAWATY, Comparison of Exposure Test and Acceleration Test for Steel Corrosion Embedded in Concrete, NACE International East Asia & Pacific Rim Area Conference & Expo 2013, Kyoto, Japan, 2013.11. |
| 10. |
Rita Irmawaty, 濵田 秀則, 佐川 康貴, 池田 隆徳, Enhancement of Chloride Resistance of Prestressed Concrete Sheet Pile by Blast-furnace Slag, 土木学会第67回年次学術講演会, 2012.09. |
| 11. |
Amry Dasar, 濵田 秀則, 佐川 康貴, 池田 隆徳, Effectiveness of Marine Aquatic Organisms as Concrete Surface Cover on Chloride Ingress into Concrete, 土木学会第67回年次学術講演会, 2012.09. |
| 12. |
Measurement by Digital Image Correlation Method of Expansion of Concrete Deteriorated by Alkali-Silica Reaction. |
| 13. |
Proceedings of the International Conference on Durability of Concrete Structures (ICDCS2008), Vol.1, pp.563-569, November, 2008. |
| 14. |
Experimental study on antifouling effect of oxidized titanium photocatalyst under real environment. |
| 15. |
Discussion on Ideal Way of Infrastructure Development Based on Asset Evaluation -A Case Study of the Bridges in Fukuoka City-. |
| 16. |
Construction Management of Titanium Oxide Coating Method Combined with Fluorocarbon Resin Surface Protection Method. |
| 17. |
A Discussion of Suppressing Effectiveness on Alkali-Silica Reaction of Fly Ash. |
| 18. |
A study on the resistance to chloride ion penetration of mortar and concrete incorporating fly ash as fine aggregate. |
| 19. |
The Characteristics of Expansion of Curbstone Concrete Initiated Granite and Reproduction Experiment. |
| 20. |
Evaluation of Strength of Mortar with Recycled Fine Aggregate by Pore Volume of Adhered Paste. |
| 21. |
A study on Carbonation and Resistance to the Chloride Penetration Properties of High-Strength Concrete Used Recycled Aggregate for Utility Pole. |
| 22. |
A Study on the Applicability of Digital Image Correlation Method to Measuring of Strain Distribution on the Surface of Concrete. |
| 23. |
Effect of Curing Condition ot High Strength Concrete with Grand Granulated Blast-furnace Slag. |
| 24. |
Compressive Fatigue Strength of Artificial Light Weight Aggregate Concrete. |
| 25. |
An investigation of the Discount Rate used for the Life Cycle Cost (LCC) trial calculation. |
| 26. |
Influences of strengthening ratio on flexural strength of Rc beams strengthened with carbon fiber sheet. |
| 27. |
A study on the influence of recycled aggregate quality on compressive strength and drying shrinkage of recycled concrete. |
| 28. |
The trial production of a cement for class 32,5 of standard strength based on ISO standard using Slowly cooled blast furnace slag. |
| 29. |
A Study on Carbonation of the Concrete Mixed Various Admixtures. |
| 30. |
A study on carbonation of high strength concrete with Ground Granuleted Blast Furnace Slag. |
| 31. |
A study on salt damage of the low water-cement ratio concrete mixed with graoud granulated blast furnace slag. |
| 32. |
Examination about life cycle cost (LCC) evaluation of the highway bridge which receives damage from salt water. |
| 33. |
An Effect of Quality of Recylcled Aggregate to Compressive Strength of Recycled Concrete. |
| 34. |
A Study on Effectiveness of Flexural Strengthening of RC Beams Strengthened by Carbon Fiber Sheet. |
| 35. |
A study on physical properties of recycled aggregate produced by several manufacturing methods. |
| 36. |
COMPRESSIVE FATIGUE STRENGTH OF RECYCLED AGGREGATE CONCRETE IN THE WATER. |
| 37. |
A Study on Physical Properties of Recycled Aggregate Crushed by Various Methods. |
| 38. |
Ion removal by the mortar which mixed zeolite. |
| 39. |
The effect of physical properties of impregnant adhesive on the bond characteristics between carbon fiber sheet and concrete. |
| 40. |
Bending Properties of Steel-Concrete Composite Girders with Automatically Welded Box Dubel. |
| 41. |
Mechanical Properties of Steel Fiber Reinforced High Strength Mortar. |
| 42. |
The Relationship of Failure Process of PC Pier and Behavior of PC Bars. |
| 43. |
A Study on a New Method of Anchorage of Carbon Fiber Sheet for Flexural Strengthening. |
| 44. |
Experiment of RC Beam Reinforced with CFRP Adhesive Method Having Variety of Shear-span Ratio. |
| 45. |
Experiment of Carbon Fiber Sheet on CFRP Adhesive Method. |
