Development of the hybrid geomaterial using industrial waste and itsinterdisciplinary significance

日本废旧物资S的巨大增长是当今最大的挑战之一。日本每年产生超过170万吨的石膏废石膏板，需要进行有益的利用，以避免在垃圾填埋场进行昂贵的处置，并保持良好的环境。本研究探讨了利用石膏废料生产的再生钙钛矿与灰渣配合使用来改善软粘土的强度。为此，将回收的硅灰石按不同比例掺入粉煤灰中，作为稳定剂对试验土壤进行改良。用少量炉渣水泥处理钠钙石灰混合料，以防止镁橄榄石的溶解。试验结果表明，硅灰石-灰渣掺合料对试验土体的强度有显著的改善作用。在所研究的范围内，掺入硅灰石和灰渣对环境没有任何负面影响，外加剂中固化剂用量的增加改善了试验土壤的环境性质。根据内部结构的观察，这是由于钙矾石产量的增加。

The huge growth of waste material s in Japan is one of the largest challengesnowadays. Over 1.7 million tons of gypsum waste plasterboards are generated every year in Japan,and beneficial uses are needed to avoid costly disposal in landfills and keep sound environment. Thisstudy investigates the use of recycled Bassanite which is produced from gypsum wastes inconjunction with coal ash to improve the strength of soft clay soil . For this purpose, recycledBassanite was mixed with coal ash in different proportions and this admixture used as a stabilizer toenhance t he performance of the tested soil . The Bassanite-coal ash admixture was treated with asmall amount of Furnace cement to prevent the solubility of bassanite. The test results show that theBassanite-coal ash admixture has a significant effect on t he strength improvement of tested soil . Theuse of Bassanite-coal ash admixture within the limits investigated in this study did not show anynegative effect on the environment and the increased solidification agent level in admixtureimproved environmental properties of the tested soil. Based on the observation of internalstructure, this is due to concomitant increase in the production of ettringite.