Steric hardening and the ordering of asphaltenes in bitumen

被引：69

作者：

Masson, JF ^{[1
]}

Collins, P ^{[1
]}

Polomark, G ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Res Construct, Ottawa, ON K1A 0R6, Canada

来源：

ENERGY & FUELS | 2005年 / 19卷 / 01期

关键词：

D O I：

10.1021/ef0498667

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Steric hardening is the hardening of bitumen over time at room temperature. It occurs after bitumen is melted, and it often leads to poor reproducibility in standard testing. Modulated differential scanning calorimetry shows that asphaltenes order when bitumen is cooled from the melt and that this phenomenon is time-dependent. This paper establishes the link between the ordering of the asphaltenes in bitumen and its steric hardening. It is suggested that at least 24 h elapse between the melting and pouring of bitumen and its subsequent testing by standardized methods.

引用

页码：120 / 122

页数：3

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