所属单位：

材料科学与工程学院

发表刊物：

Advances in Cement Research

关键字：

中文关键字：塑性 萘系减水剂 吸附模型，英文关键字：plasticity, polynaphthalene sulphonate, adsorption

摘要：

The influence of sodium gluconate (SG) on the adsorption of polynaphthalene sulfonate (PNS) superplasticiser on the surface of particles was investigated using cement and fly ash pastes. Below the saturated PNS dosage, SG reduces the fluidity loss of the two pastes and the amount of PNS adsorbed on the particle surface. The similarity of this behaviour for the two pastes indicates that inhibition of cement hydration is not the sole reason for SG reduction of fluidity loss of cement paste with PNS. X-ray photoelectron spectroscopy data show competing adsorption forces between SG and polar groups of PNS on the active points of the cement particle surface. This reduces the transformation rate from a caudal style to either a ring or horizontal PNS adsorptive style, as confirmed by dynamic adsorptive models. These are important mechanisms of SG reduction in the fluidity loss of cement pastes with PNS.

备注：

伍勇华

第一作者：

宋学锋,何廷树,伍勇华

论文类型：

期刊论文

卷号：

卷：23

期号：

期：5

页面范围：

页：249-254

是否译文：

否

发表时间：

2011-10-01