Development of safe and high-performance geopolymer incorporating advanced activation technique of waste powders

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630255
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Building structures/Materials
• Research Institution: Mie University
• Principal Investigator: Hatanaka Shigemitsu 三重大学, 工学(系)研究科(研究院), 教授 (00183088)
• Co-Investigator(Kenkyū-buntansha): MISHIMA Naoki 三重大学, 大学院工学研究科, 准教授 (30335145) ; INUKAI Toshitsugu 岐阜工業高等専門学校, 建築学科, 教授 (30548326)
• Research Collaborator: MAEGAWA Akihiro 三重県工業研究所, ものづくり研究課, 主幹研究員
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: ジオポリマー / 高炉スラグ / フライアッシュ / 水ガラス / 圧縮強度 / 凝結 / 乾燥収縮率 / 固体NMR分析

Outline of Final Research Achievements

In the present study, influencing factors have been grasped on the compressive strength, fluidity, and drying shrinkage of geopolymer with blast furnace slag and fly ash. When blast furnace slag is used in geopolymer, setting time is retarded.
In order to stop or decrease the retardation, it was found effective to reduce Na2O/SiO2 molar ratio, to add gypsum, etc. Effect of pulverization as one of the activation techniques was examined, and no outstanding effect was observed. As for drying shrinkage, that of geopolymer with blast furnace slag was larger, while geopolymer with fly ash was smaller, respectively, compared with that of ordinary Portland cement. From the NMR analysis on hardened geopolymer solids, it was confirmed that different type hardened solids were produced, comparing the blast furnace slag used geopolymer and fly ash used one.

Free Research Field

コンクリート工学