摘要
以鸡毛为原料,采用Ca(OH)2水解法制备蛋白质型发泡剂,系统考察原料预处理、Ca(OH)2用量、水解时间与水解温度对发泡剂泡沫性能的影响。并向该发泡剂中掺加正丁醇与粘性物质羧甲基纤维素钠(CMC)进行复配改性,以改善发泡剂泡沫性能。最后使用4种不同类型发泡剂制备泡沫混凝土,研究其对泡沫混凝土强度以及孔结构的影响。结果表明,制备蛋白质型发泡剂最佳工艺参数为:Ca(OH)210g、水解温度110℃、水解时间2h;复配改性时正丁醇与CMC掺量分别为0.2%、0.03%时,泡沫稳定性最好,1h泌水率由38.89%降至11.59%。以改性蛋白质型发泡剂制备的300kg/m3级泡沫混凝土,其强度相对其他3种发泡剂制备的要高,28d抗压强度达到0.85MPa,且其孔径在0.5mm左右,孔分布较为均匀规整。
Protein foaming agent is produced by the method of Ca （OH）2 hydrolysis using chicken feather as the raw material, and the effects of pretreatment of raw material, mass of Ca （OH）E, hydrolysis time, hydrolysis temperature on the foam performance of the foaming agent are investigated systematically in this paper. The foam performance is further improved by compound modification with the addition of buryl alcohol and viscous substance sodium carboxy methyl cellulose （CMC）. At last, the compressive strength and pore structure of foamed concrete prepared by four different kinds of foaming agent is also investigated. Results show that the best process parameters are lOg Ca （OH）2, hydrolysis temperature 110℃, hydrolysis time 2h. The simultaneous addition of 0.2% normal butanol and 0.03% CMC is proved the most effective to the foam stability, which presented its lh bleeding ratio reducing from 38.89% to 11.59%. 300kg/m^3 foamed concrete prepared by modified protein foaming agent with the 28d compressive strength 0.85MPa is founded to have higher strength than the others, and its pores distributed uniformly with the pore size 0.5mm.
出处
《混凝土与水泥制品》
北大核心
2013年第11期23-28,共6页
China Concrete and Cement Products
关键词
蛋白质型发泡剂
泡沫稳定性
复配改性
孔结构
Protein foaming agent
Foam stability
Compound modification
Pore structure
