氯氧镁水泥复合发泡剂的研究
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摘要
发泡剂是影响发泡氯氧镁水泥性能的重要因素,用1%的十二烷基硫酸钠溶液作为发泡剂,并分别掺加壬基酚聚氧乙烯醚、明胶、茶皂素和改性硅树脂聚醚乳液进行稳泡复配改性,研究复合发泡剂对发泡氯氧镁水泥密度、抗压强度及孔径的影响。结果表明:1%十二烷基硫酸钠中加入浓度为0.5%硅树脂聚醚乳液的复合发泡剂性能最优,发泡倍数由16.80倍提高到17.08倍,半衰期由22 min延长到216.81 min;加入浓度1%明胶复配改性的复合发泡剂性能次之,发泡倍数为16.75倍,泡沫半衰期为55 min。1%明胶改性的复合泡沫与氯氧镁水泥浆体结合时消泡最少,制得的试块泡孔大小均匀、规整,当泡沫添加量相同时,试块密度相对最小,强度较高。
Foaming agent is an important factor affecting the performance of foamed magnesium oxychloride cement. This paper chose 1% sodium dodecyl sulfate solution as a foaming agent,nonylphenol ethoxylates,gelatin,tea saponin and modified polyethoxylated silicone emulsion were respectively used to modify the foam stability. The effect of composite foaming agents on density,compressive strength and pore structure of foamed magnesium oxychloride cement was studied. The results showed that the composite foaming agent with the concentration of 0.5% modified polyethoxylated silicone emulsion stabilizer at 1% sodium dodecyl sulfate has the best performance,foam expansion increases from 16.80 to 17.08,half-time extends from 22 min to 216.81 min,the performance of composite foaming agent with 1% gelatin follows,foam expansion is 16.75,half-time of the foam is 55 min. When the gelatin-modified foam combines with magnesium oxychloride cement paste,the amount of antifoam is least. The pore size of the samples is uniform and regular,when the amount of foam is same,the samples have the lowest density and higher strength.
Foaming agent is an important factor affecting the performance of foamed magnesium oxychloride cement. This paper chose 1% sodium dodecyl sulfate solution as a foaming agent,nonylphenol ethoxylates,gelatin,tea saponin and modified polyethoxylated silicone emulsion were respectively used to modify the foam stability. The effect of composite foaming agents on density,compressive strength and pore structure of foamed magnesium oxychloride cement was studied. The results showed that the composite foaming agent with the concentration of 0.5% modified polyethoxylated silicone emulsion stabilizer at 1% sodium dodecyl sulfate has the best performance,foam expansion increases from 16.80 to 17.08,half-time extends from 22 min to 216.81 min,the performance of composite foaming agent with 1% gelatin follows,foam expansion is 16.75,half-time of the foam is 55 min. When the gelatin-modified foam combines with magnesium oxychloride cement paste,the amount of antifoam is least. The pore size of the samples is uniform and regular,when the amount of foam is same,the samples have the lowest density and higher strength.
引文
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[19]Jin Shanshan,Zhang Jinxi,Han Song.Fractal analysis of relation between strength and pore structure of hardened mortar[J].Construction and Building Materials,2017,135:1-7.
[20]Li Hedong,Zeng Qiang,Xu Shilang.Effect of pore shape on the thermal conductivity of partially saturated cement-based porous composites[J].Cement and Concrete Composites,2017,81:87-96.
[2]马慧,关博文,王永维,等.氯氧镁水泥胶凝材料的研究进展[J].材料导报,2015,29(8):103-107.
[3]涂平涛.氯氧镁胶凝材料的组成与性能的相关性[J].新型建筑材料,1994(6):24-27.
[4]吴金焱,朱书全.氯氧镁水泥及其制品的研发进展[J].中国非金属矿工业导刊,2006(1):15-18.
[5]李瑞芬,姜效军,张洪涛,等.氯氧镁水泥泡沫保温板添加剂的研究与应用[J].新型建筑材料,2006(1):72-75.
[6]温福胜,刘福胜,封凌竹,等.氯氧镁水泥基复合保温砂浆耐水性能研究[J].新型建筑材料,2016(3):69-73.
[7]余红发.氯氧镁水泥及其应用[M].北京:中国建材工业出版,1993.
[8]闫振甲,何艳君.氯氧镁水泥改性及制品生产实用技术[M].北京:化学工业出版社,2006.
[9]苏素芹,杨小平,许红升,等.氯氧镁水泥复合保温材料研究[J].新型建筑材料,2005(1):47-49.
[10]苏雪筠,苏茂尧.化学发泡氯氧镁水泥防火材料的研究[J].硅酸盐学报,2002(1):135-137.
[11]刘阳,唐明,宋学君.混凝土发泡剂研究进展[J].混凝土,2012(9):57-59.
[12]于水军,王玉龙,周俊伟,等.复合型动植物蛋白发泡剂的制备及其性能研究[J].河南理工大学学报(自然科学版),2011,30(3):331-335.
[13]王翠华,潘志华.蛋白质类发泡剂的合成及其泡沫稳定性[J].南京工业大学学报(自然科学版),2006,28(4):92-96.
[14]高波,王群力,周孝德.混凝土发泡剂及泡沫稳定性研究[J].粉煤灰综合利用,2004(1):13-16.
[15]Jambrak A R,Mason T J,Lelas V,et al.Ultra sonic effect on physicochemical and functional properties of lactalbumin[J].LWT-Food Science Technology,2010,43:254-262.
[16]张雄,黄廷皓,张永娟,等.Image-Pro Plus混凝土孔结构图像分析方法[J].建筑材料学报,2015,18(1):177-182.
[17]王海波,肖贤明.泡沫复合驱体系稳定性及稳泡机理研究[J].钻采工艺,2008,31(1):117-120.
[18]周美莲.混凝土新型发泡剂的研究与应用[D].长沙:湖南大学,2013.
[19]Jin Shanshan,Zhang Jinxi,Han Song.Fractal analysis of relation between strength and pore structure of hardened mortar[J].Construction and Building Materials,2017,135:1-7.
[20]Li Hedong,Zeng Qiang,Xu Shilang.Effect of pore shape on the thermal conductivity of partially saturated cement-based porous composites[J].Cement and Concrete Composites,2017,81:87-96.