900密度等级渣土陶粒的制备及性能研究

关键字：渣土陶粒,烧制工艺,微观结构,粉煤灰

（1.天津城建大学 材料科学与工程学院，天津  300384；2.天津城建大学 土木工程学院，天津  300384；3.天津市建筑垃圾与燃煤废弃物利用技术工程中心，天津  300384；4.天津市软土特性与工程环境重点实验室，天津  300384；5.中国铁建大桥工程局集团第四工程有限公司，天津  300300；6.中国铁建大桥工程局集团有限公司，天津  300300）

    摘要：为促进工程渣土的进一步研究应用并结合绿色高强陶粒的需求现状，通过研究原料、焙烧温度、配比优化对渣土陶粒堆积密度的影响，确定渣土陶粒最佳烧制工艺，并对最佳烧制工艺条件下制备的渣土陶粒进行表观密度、筒压强度、1 h吸水率、烧失量等物理性能和微观结构研究。研究结果表明：当工程渣土掺量为80％～83％，粉煤灰掺量为17％～20％，焙烧温度1170～1180 ℃时，均能制备出900密度等级的渣土陶粒；制备的渣土陶粒呈浅棕色，表面光滑且有完好的釉质层，内部疏松多孔，呈蜂窝状，最大孔径在100 μm左右，且有少量的连通孔。

    关键词：渣土陶粒；烧制工艺；微观结构；粉煤灰

    中图分类号：TU52  文献标识码：A   文章编号：1001-702X（2017）01-0109-05

 

Research on preparation and properties of muck ceramsite for 900 density level

ZHANG Tengfei1，RONG Hui1，LIU Zhihua1，WANG Hailiang2，ZHANG Lei1，3，4，DI Zhikun5，SONG Weijun6，QI Zhanguo6，LI Xianghai6

（1.School of Materials Science and Engineering，TianJin ChengJian University，Tianjin 300384，China；2.School of Civil Engineering，TianJin ChengJian University，Tianjin 300384，China；3.TianJin Engineering Technology Center of Utilizing Construction Waste and Coal Waste，Tianjin 300384，China；4.TianJin Key Laboratory of Soft Characteristics and Engineering Environment，Tianjin 300384，China；5.The Forth Engineering Co. Ltd. of China Railway Construction Bridge Engineering Bureau Group，Tianjin 300300，China；6.China Railway Construction Bridge Engineering Bureau Group Co. Ltd.，Tianjin 300300，China）

    Abstract：In order to promote the further study and application of muck and combining with the demand of green high-strength ceramsite，determining the best firing technology by studying the effects of raw materials，firing temperature，the ratio of raw materials on bulk density of samples，and physical properties such as the apparent density，cylinder pressure，1 h water absorption and loss and microstructure of muck ceramsite which was prepared under the optimal firing technology conditions were tested. The results show that：when the muck content is 80%~83%，the amount of fly ash is 17%~20%，roasting temperature is 1170~1180 ℃，muck ceramsite of 900 density level could be prepared；which were in light brown，smooth surface and intact enamel layer，internal porous honeycomb，maximum pore size of about 100 μm，and a small amount of connecting hole.

    Key words：muck ceramsite，firing technology，microstructure，fly ash