| 1. |
Dasar Amry, Patah Dahlia, Hamada Hidenori, Yamamoto Daisuke, Sagawa Yasutaka, Life performance of 40-year-old RC beams with different concrete covers and bar diameters in natural corrosion environments, Structures, 10.1016/j.istruc.2022.11.033, 46, 2031-2046, 2022.12. |
| 2. |
Kawabata, Yuichiro; Yamada, Kazuo; Kawakami, Takashi; Sagawa, Yasutaka, Environmental impacts on expansion of concrete due to alkali-silica reaction, MAGAZINE OF CONCRETE RESEARCH, 10.1680/jmacr.22.00158, 2022.09. |
| 3. |
Onoue, Kozo; Sagawa, Yasutaka; Atarashi, Daiki; Takayama, Yuji, Optimization of mix proportions and manufacturing conditions of fly ash-based geopolymer mortar by parameters design with dynamic characteristics, CEMENT & CONCRETE COMPOSITES, 10.1016/j.cemconcomp.2022.104645, 133, 2022.10. |
| 4. |
Shigetada Hatakeyama, Yasutaka Sagawa, Hidenori Hamada, Shinichi Hino, Mamoru Masaki, Yuji Sato, Development of Improved Loop Joint Applied for Precast PC Deck Slab, Journal of Advanced Concrete Technology, https://doi.org/10.3151/jact.19.644, 19, 6, 644-654, 2021.06. |
| 5. |
K. Yamada, T. Yamamoto, Y. Kawabata, Y. Sagawa, N. Ueda, Y. Kubo & S. Ogawa, Performance based design and maintenance strategy with controlling ASR, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations (Proceedings of the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), June 28-July 2, 2020, Sapporo, Japan), https://doi.org/10.1201/9780429279119-352, 2579-2587, 2021.03. |
| 6. |
Y. Kawabata, K. Yamada, S. Ogawa & Y. Sagawa, Mechanisms of internal swelling reactions: Recent advances and future research needs, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations (Proceedings of the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), June 28-July 2, 2020, Sapporo, Japan), https://doi.org/10.1201/9780429279119-355, 2599-2607, 2021.03. |
| 7. |
K. Yamada, Y. Kawabata, S. Ogawa & Y. Sagawa, A method keeping total alkali content and maximizing water supply for concrete prism test of potential expansion by ASR, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations (Proceedings of the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), June 28-July 2, 2020, Sapporo, Japan), https://doi.org/10.1201/9780429279119-356, 2608-2612, 2021.03. |
| 8. |
T. Kawakami, Y. Sagawa, Y. Kawabata, K. Yamada & S. Ogawa, A study on ASR expansion behavior of concrete exposed to natural environment for 5 years: Experimental and numerical approaches, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations (Proceedings of the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), June 28-July 2, 2020, Sapporo, Japan), https://doi.org/10.1201/9780429279119-360, 2637-2643, 2021.03. |
| 9. |
D. Yamamoto, H. Hamada & Y. Sagawa, An experimental discussion on bond strength reduction of ASR damaged concrete, Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations (Proceedings of the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), June 28-July 2, 2020, Sapporo, Japan), https://doi.org/10.1201/9780429279119-361, 2644-2650, 2021.03. |
| 10. |
Dasar, A., Patah, D., Hamada, H., Sagawa, Y., Yamamoto, D., Applicability of seawater as a mixing and curing agent in 4-year-old, Construction and Building Materials, 10.1016/j.conbuildmat.2020.119692, 259, Article number 119692, 2020.10. |
| 11. |
T. KAWAKAMI, Y. KAWABATA, K. YAMADA, Y. SAGAWA, THE CONCEPT OF AN ASR MODEL ABLE TO DESCRIBE VARIOUS COMPLEX PESSIMUM EFFECTS, Proceedings of the ConMat’20, 2020.08. |
| 12. |
YEN THENG LOKE, HIDENORI HAMADA, YASUTAKA SAGAWA, DAISUKE YAMAMOTO, HIROTAKA HAZEHARA, TADAAKI NOZAWA, YUKI KOBAYASHI, COMPARATIVE STUDY ON DURABILITY OF REINFORCED CONCRETE MEMBER MADE WITH 150 MPA HIGH STRENGTH MORTAR WITH CRACKS UNDER CHLORIDE ENVIRONMENT, Proceedings of the ConMat’20, 2020.08. |
| 13. |
DAISUKE YAMAMOTO, HIDENORI HAMADA, YASUTAKA SAGAWA, MASAHIRO HARUGUCHI, HIROYUKI YAMADA, AN INVESTIGATION OF LONG-TERM RESISTANCE TO CHLORIDE PENETRATION AND STEEL CORROSION ON EXISTING CONCRETE STRUCTURE WITH SCMS, Proceedings of the ConMat’20, 2020.08. |
| 14. |
S. HATAKEYAMA, S. HINO, H. HAMADA, Y. SAGAWA, Y. SATO, S. KAWABE, M. MASAKI, RESISTANCE AGAINST FATIGUE LOADING OF PRECAST PC DECK SLAB WITH THE IMPROVED LOOP JOINT, Proceedings of the ConMat’20, 2020.08. |
| 15. |
KATSUNOBU SHINKAI, HIROKI GODA, KOJI HARADA, YASUTAKA SAGAWA, MAKOTO HIBINO, THE BASIC RESEARCH ON ASR RESISTANCE OF GEOPOLYMER, Proceedings of the ConMat’20, 2020.08. |
| 16. |
K. KAMARULZAMAN, P. ASTUTI, M.A. CARONGE, L. NGUYEN, H. HAMADA, Y. SAGAWA, D. YAMAMOTO, COMBINATION OF IMPRESSED CURRENT AND SACRIFICIAL ANODE CATHODIC PREVENTION TO IMPROVE CORROSION PREVENTION SYSTEM IN REINFORCED CONCRETE, Proceedings of the ConMat’20, 2020.08. |
| 17. |
PINTA ASTUTI, RAHMITA SARI RAFDINAL, HIDENORI HAMADA, YASUTAKA SAGAWA, DAISUKE YAMAMOTO, A STUDY ON REPAIRING SYSTEM OF SEVERELY DAMAGED RC BEAM BY CATHODIC PROTECTION USING DIFFERENT KIND OF SACRIFICIAL ANODES, Proceedings of the ConMat’20, 2020.08. |
| 18. |
YASUTAKA SAGAWA, PROPERTIES OF CONCRETE MIXED WITH GROUND GRANULATED BLAST-FURNACE SLAG AND ITS APPLICATION FOR PRESTRESSED CONCRETE, Proceedings of the ConMat’20, 2020.08. |
| 19. |
Yuichiro Kawabata, Kazuo Yamada, Go Igarashi, Yasutaka Sagawa, Effects of Soak Solution Type on Alkali Release from Volcanic Aggre-gates − Is Alkali Release Really Responsible for Accelerating ASR Expansion? −, Journal of Advanced Concrete Technology, https://doi.org/10.3151/jact.16.61, 16, 9, 61-74, 2018.01. |
| 20. |
Amry Dasar, Hidenori Hamada, Yasutaka Sagawa, Daisuke Yamamoto, Deterioration progress and performance reduction of 40-year-old reinforced concrete beams in natural corrosion environments, Construction and Building Materials, 10.1016/j.conbuildmat.2017.05.162, 149, 690-704, 2017.09, Deterioration progress and performance reduction were experimentally evaluated in 40-year-old corroded reinforced concrete (RC) beams. The corrosion process was natural, without acceleration by current application, admixture inclusion, or exposure to an artificial chloride environment. The mechanical performance of the beams was evaluated through a four-point bending test. The corroded steel reinforcing bars were extracted for corrosion evaluation and tensile testing. A good correlation was established between crack width and cross-section loss, as well as between cross-section loss and ultimate capacity loss. Furthermore, the relationship between deterioration progress and performance degradation with the exposure period for each deterioration stage was elucidated.. |
| 21. |
Yasutaka SAGAWA, Kazuo YAMADA, Shoichi OGAWA, Yuichiro KAWABATA, Masahiro OSAKO, The Effect on Expansion of Wrapping Concrete Prisms with Cloth Saturated with Alkali Hydroxide, Proceeding of 27th Biennial National Conference of the Concrete Institute of Australia in conjunction with the 69th RILEM Week, 822-831, 2015.08. |
| 22. |
Yasutaka SAGAWA, Shu OTA, Koji HARADA, Takeyoshi NISHIZAKI, Hiroki GODA, Utilization of Fly Ash with Higher Loss on Ignition for Geopolymer Mortar, Advanced Materials Research, 10.4028/www.scientific.net/AMR.1129.614, 1129, 614-620, 2015.08. |
| 23. |
Kazuo Yamada, Shinya Karasuda, Shoichi Ogawa, Yasutaka Sagawa, Masahiro Osako, Hidenori Hamada, Mohd Isneini, CPT as an evaluation method of concrete mixture for ASR expansion, Construction and Building Materials, 10.1016/j.conbuildmat.2014.04.034, 64, 184-191, 2014.08, Highly reactive andesite aggregates including opal or tridymite were evaluated by concrete prism test (CPT) in two ways and the suitable conditions of CPT were discussed. 18 concrete mixtures were used to examine the effect of the type and content of aggregate, the type of cementitious material. Two methods for detecting for ASR reactivity were used; RILEM AAR-4 and JASS 5N, and the latter one is of which authors revised few points. As the results, different performances of andesite depending on the size and the different required amounts of fly ash suppressing ASR depending on the mixture proportion were well demonstrated by CPT that is difficult for mortar bar test. As a curing method to avoid alkali leaching, wrapping with wet paper showed much less leaching than curing in a sealed box. From the viewpoint of easiness of operation, small size 75 × 75 × 250 mm is suitable than large size 100 × 100 × 400 mm.. |
