高掺量陶瓷抛光渣对泡沫轻质土性能影响研究

Study on the Effect of High Content Ceramic Polishing Slag on the Properties of Foamed Lightweight Soil

针对掺陶瓷抛光渣泡沫轻质土开展室内试验,研究陶瓷抛光渣掺量(30%~60%)与设计湿密度(500~1000 kg/m^(3))对泡沫轻质土流动性、吸水性,以及无侧限抗压强度的影响规律.结果表明:陶瓷抛光渣掺量的提高会显著降低泡沫轻质土的流动性.随浸泡时间的增加掺陶瓷抛光渣泡沫轻质土湿密度在经历初期的迅速增长后逐渐趋于稳定,泡沫轻质土饱和吸水率(浸泡28 d后)随初始湿密度与陶瓷抛光渣掺量的增大而减小.不同龄期泡沫轻质土无侧限抗压强度均随设计湿密度的增大而增大,二者满足指数函数关系;掺陶瓷抛光渣泡沫轻质土无侧限抗压强度在掺量达到40%时达到峰值,此后随掺量的继续提高反而出现显著下降.

A series of laboratory tests were carried out on foamed lightweight soil mixed with ceramic polishing slag,and the effects of ceramic polishing slag content(30%~60%)and design wet density(500~1000 kg/m^(3))on fluidity,water absorption and unconfined compressive strength of foamed lightweight soil were studied.The results show that the increase of the content of ceramic polishing slag will significantly reduce the fluidity of foamed lightweight soil.With the increase of soaking time,the wet density of foamed lightweight soil mixed with ceramic polishing slag gradually becomes stable after the initial rapid growth.The saturated water absorption rate of light foamed soil(after soaking for 28 days)decreases with the increase of initial wet density and the content of ceramic polishing slag.The unconfined compressive strength of foamed lightweight soil at different ages increases with the increase of design wet density,and it shows exponential function.The unconfined compressive strength of foam lightweight soil mixed with ceramic polishing slag reached the peak when the content reached 40%,and then decreased significantly with the increase of the content.