纳米SiO_(2)稳泡效应及其对泡沫混凝土性能的影响  

Effects of nano-SiO_(2) on foam stability and properties of foamed concrete

作　　者：张文良 詹炳根[1,2] 卞朋飞 周耀宗 张猛 ZHANG Wenliang;ZHAN Binggen;BIAN Pengfei;ZHOU Yaozong;ZHANG Meng(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering Structures and Materials,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]土木工程结构与材料安徽省重点实验室,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2023年第12期1694-1698,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51972115)。

摘　　要：泡沫的稳定性是影响泡沫混凝土性能的重要因素,文章利用硅烷偶联剂(烷氧基硅烷聚合物)对纳米SiO_(2)(简称NS)进行表面润湿性改性,研究改性纳米SiO_(2)稳泡剂对泡沫稳定性的影响,以及不同掺量改性纳米SiO_(2)稳泡剂对泡沫混凝土流动性、强度、干燥收缩的影响。研究结果表明:硅烷偶联剂能够有效地改变纳米SiO_(2)表面润湿性,只有适当润湿性和掺量的纳米SiO_(2)才能起到提高泡沫稳定性的作用;随着改性纳米SiO_(2)稳泡剂掺量的增加,泡沫混凝土的流动度会略有下降,抗压强度得到明显提升,而抗折强度受到的影响不大,干燥收缩率也受到一定程度的抑制。The stability of foam is the key factor affecting the performance of foamed concrete.In this experiment,the surface wettability of nano-SiO_(2) was modified by silane coupling agent(alkoxy silane polymer).On this basis,the influence of modified nano-SiO_(2) foam stabilizer on the stability of foam was studied.Furthermore,the effects of different amount of modified nano-SiO_(2) foam stabilizer on the fluidity,strength and drying shrinkage of the foamed concrete were studied.The results show that silane coupling agent can effectively change the surface wettability of nano-SiO_(2).Only nano-SiO_(2) with proper wettability and concentration can enhance the foam stability.With the increase of the content of modified nano-SiO_(2) foam stabilizer,the fluidity of foamed concrete will decrease slightly,the compressive strength will obviously increase,the flexural strength will not be greatly affected,and the drying shrinkage can also be restrained to a certain extent.

关 键 词：泡沫混凝土 硅烷偶联剂 纳米SiO_(2) 泡沫稳定性 力学性能 

分 类 号：TU528.2[建筑科学—建筑技术科学]