The incorporation of hazardous solid waste in fired bricks fabrication is a viable way. However, the physical and mechanical properties of products were negatively influenced due to the involvement of hazardous solid waste. Three fluxing agents, waste glass powder (WGP), Na-feldspar and K-feldspar, were introduced in this study to eliminate these negative influences. Physical and mechanical properties were tested by standard method. Microstructure and pore structure of bricks were conducted by Scanning Electron Microscopy (SEM) and nitrogen adsorption and desorption isotherm.

The change in mineral phase was detected by X-Ray Diffraction (XRD). The leaching toxicity of heavy metals were carried out by Toxicity Characteristic Leaching Procedure (TCLP) and Netherlands tank leaching test. The introduction of fluxing agents can greatly promote effectively compressive strength and decline water absorption. When 30 wt% (weight percent) of fluxing agents are added, water absorption reduced by more than 50%, and compressive strength increased by more than one time. XRD and SEM analysis showed that fluxing agents can promote the formation of glass-ceramic phase, which were mainly formed by the self-melting reaction of fluxing agents and the interaction with silicon-aluminium oxides. These dense glass phases could reduce the porosity and promote the compactness of microstructure. The formation of glass-ceramic phases could also reduce the leachability risk of heavy metals. Combing with properties of brick and price of fluxing agents, WGP is considered to be more suitable for improving properties of fired bricks containing hazardous waste. This study could provide some useful parameters and knowledge for improving properties and leaching toxicity risk when hazardous wastes were utilized in the production of fired brick.

将危险固体废物掺入到烧砖的制造中是一种可行的方法。但是，由于有害固体废物的介入，产品的物理和机械性能受到负面影响。为了消除这些负面影响，本研究引入了三种助熔剂，废玻璃粉（WGP），钠长石和钾长石。物理和机械性能通过标准方法测试。砖的微观结构和孔隙结构通过扫描电子显微镜（SEM）和氮吸附和解吸等温线进行。

矿物相的变化通过X射线衍射（XRD）检测。重金属的浸出毒性通过毒性特征浸出程序（TCLP）和荷兰的罐浸试验进行。助熔剂的引入可以极大地提高抗压强度并降低吸水率。当添加30重量％（重量百分比）的助熔剂时，吸水率降低超过50％，并且抗压强度提高超过一倍。XRD和SEM分析表明，助熔剂可以促进玻璃-陶瓷相的形成，其主要由助熔剂的自熔反应以及与硅铝氧化物的相互作用形成。这些致密的玻璃相可以降低孔隙率并促进微观结构的致密性。玻璃陶瓷相的形成还可以降低重金属的浸出风险。考虑到砖的性能和助熔剂的价格，WGP被认为更适合改善含有危险废物的烧结砖的性能。这项研究可以提供一些有用的参数和知识，以提高在燃烧砖生产中使用危险废物时的性能和浸出毒性风险。