泡沫混凝土发泡剂的稳定性研究

Study on Foam Stability of Foaming Agent for Foam Concrete

摘要:

以松香型发泡剂为基体，系统地考察了十二烷基硫酸钠、低碳链脂肪醇和粘性物质（羧甲基纤维素钠）的添加对发泡液的发泡倍数和泡沫稳定性的影响。实验结果表明，在松香型发泡剂中分别掺加三种低碳链脂肪醇均能有效地提高泡沫的稳定性，其中正丁醇的效果最好，1h泌水率由原来的37%下降到22.4%，而十二烷基硫酸钠的效果最差，不利于稳定性的改进。对于这三种低碳链脂肪醇，相同掺量的情况下，泡沫稳定性随着脂肪醇碳链长度的增加而提高。与粘性物质羧甲基纤维素钠进行复配时，在6%发泡剂稀释液中掺加0.16%正丁醇和0.01%羧甲基纤维素钠，发泡和稳泡效果最好，发泡倍数达到27.33，1h泌水率仅为16.23%。

Abstract:

The effect of the addition of some chemical substances such as Sodium dodecyl sulfate, low carbon chain of fatty alcohols and some viscous substance (sodium carboxymethyl cellulose) on the foaming ability of rosin based foaming agent and its foam stability was investigated experimentally and systematically in this paper. Results showed that introduction of three low carbon chain of fatty alcohols into the rosin based foaming agent improved the foam stability effectively, and the addition of buryl alcohol showed the best effect, 1h bleeding ratio reduced from 37% to 22.4%, whereas sodium dodecyl sulfate presented the poorest one. Stability of the resultant foam was found improved significantly with the chain length of the introduced low carbon chain of fatty alcohols at the same dosage. The simultaneous addition of 0.16% normal butanol and viscous substance Sodium carboxy methyl cellulose into the 6% diluted rosin based foaming agent was proved the most effective to the foaming ability and the stability of the resultant foam, which presented its foaming ability 27.33 and its 1h bleeding ratio16.23%.