Development of the hybrid geomaterial using industrial waste and itsinterdisciplinary significance

在日本，废物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理，并保持良好的环境。本研究探讨利用石膏废料与粉煤灰混合制成再生巴桑石，以改善软黏土之强度。为此，将风化玄武岩与粉煤灰按不同比例混合，作为稳定剂来提高试验土的性能。用少量水泥对玄武岩-粉煤灰混合料进行处理，以防止玄武岩的溶解。试验结果表明，玄武岩粉煤灰掺合料对试验土的强度有显著的提高作用。在本研究的范围内使用玄武岩-粉煤灰掺合料对环境没有任何负面影响，并且掺合料中固化剂含量的增加改善了测试土壤的环境特性。根据内部结构的观察，这是由于钙矾石的产生伴随增加。

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.