废瓷砖在路面底基层中的应用

董煊¹，迟连阳^2*，王发强³，管清泳³，王正文³，宋志超⁴

1.中铁二十三局集团第一工程有限公司，山东济南276800; 2.山东交通学院交通土建工程学院，山东济南250357；

3.山东舜都路桥工程有限公司，山东潍坊262200；4.山东东方路桥建设有限公司，山东临沂276002

摘要：为研究废瓷砖颗粒和石灰土作为填料用于路面底基层的性能，采用低塑性黏土、石灰土、废瓷砖颗粒和水制备试件，对石灰土（替换黏土）质量分数为12%、不同废瓷砖颗粒质量分数下的试件分别进行加州承载比试验、无侧限抗压强度试验、击实试验和固结试验。试验结果表明：添加废瓷砖颗粒提高了试件的最大干密度和最大加州承载比，废瓷砖颗粒质量分数由0增至30%时，最大干密度从1 616 kg/m3增至1 751 kg/m3，最大加州承载比从83.01%增至89.26%；试件的最佳含水量、膨胀率、无侧限抗压强度及孔隙比减小，最佳含水量从17.5%减至12.8%，膨胀率从2.29%减至1.08%，无侧限抗压强度从1 138 kPa减至868 kPa，废瓷砖颗粒质量分数为30%时，孔隙比从0.500减至0.473。综合考虑该混合料的性能，低塑性黏土-石灰土-废瓷砖颗粒混合料不适合用作路面基层材料，可用作底基层材料。

关键词：路面；底基层；废瓷砖；低塑性黏土；加州承载比；无侧限抗压强度

Application of waste ceramic tiles in the subbase layer of road pavement

DONG Xuan¹, CHI Lianyang^2*, WANG Faqiang³,GUAN Qingyong³, WANG Zhengwen³, SONG Zhichao⁴

1.China Railway 23th Bureau Group First Engineering Co., Ltd., Jinan 276800, China；

2.School of Civil Transportation Engineering, Shandong Jiaotong University, Jinan 250357, China；

3.Shandong Shundu Road and Bridge Engineering Co., Ltd., Weifang 262200, China;

4.Shandong Dongfang Road and Bridge Construction Co., Ltd., Linyi 276002, China

Abstract:To study the performance of waste ceramic tile particles and lime soil as fillers for road subbase, specimens are prepared using lowplasticity clay, lime soil, waste ceramic tile particles, and water. The specimens with a mass fraction of lime soil(replacing clay) at 12% and different mass fractions of waste ceramic tile particles are subjected to California bearing ratio tests, unconfined compressive strength tests, compaction tests, and consolidation tests. The test results show that the addition of waste ceramic tile particles increases the maximum dry density and maximum California bearing ratio of the specimens. As the mass fraction of waste ceramic tile particles increases from 0 to 30%, the maximum dry density increases from 1 616 kg/m3 to 1 751 kg/m3, and the maximum California bearing ratio increases from 83.01% to 89.26%. The optimum moisture content, swell, unconfined compressive strength, and void ratio of the specimens decreases. The optimum moisture content decreases from 17.5% to 12.8%, swell decreases from 2.29% to 1.08%, and unconfined compressive strength decreases from 1 138 kPa to 868 kPa. When the mass fraction of waste ceramic tile particles is 30%, the void ratio decreases from 0.500 to 0.473. Considering the overall performance of the mixed material, the low-plasticity clay-lime soil-waste ceramic tile particle mixture is not suitable for use as road surface base material but can be used as subbase material.

Keywords:road pavement subbase layer; waste ceramic tile; low plastic clay; California bearing ratio; unconfined compressive strength