- 目录
- 新型墙体材料与施工
- 首页
改善轻质复合墙板中EPS混凝土收缩性能的试验研究
作者：苏柳月1，李碧雄2
（1.广西科技大学 土木建筑工程学院，广西 柳州 545006；
2.四川大学 建筑与环境学院，四川 成都 610065）
摘要：聚苯乙烯（EPS）混凝土夹芯轻质复合墙板是目前工程中应用较多的新型墙体材料之一，但其芯材聚苯乙烯（EPS）混凝土收缩变形大成为制约其发展的关键因素。为改善EPS混凝土的收缩性能，通过收缩性能试验和SEM对海藻酸钠、黄原胶、硅藻土在EPS混凝土中的影响机理进行了分析。研究表明：海藻酸钠、黄原胶、硅藻土均能够降低EPS混凝土的失水率，减小EPS混凝土的收缩值，改善EPS混凝土的微观结构，使其有害孔洞数量减少，密实度更高。
关键字：EPS混凝土；收缩性能；海藻酸钠；黄原胶；硅藻土；微观结构
中图分类号：TU528.72 文献标识码：A 文章编号：1001-702X（2020）02-0105-04
Experimental study on improving shrinkage properties of lightweight EPS concrete in composite wall panels
SU Liuyue1，LI Bixiong2
（1.School of Civil Engineering and Architecture，Guangxi University of Science and Technology，Liuzhou 545006，China；
2.School of Architecture and Environment，Sichuan University，Chengdu 610065，China）
Abstract：Expanded polystyrene（EPS） based lightweight concrete sandwich wall panel is widely used as a new type of wall materials in engineering. However，the shrinkage of EPS concrete becomes a key factor to restrict the development of sandwich wall panel. In order to improve the shrinkage property of EPS concrete，the influence of sodium alginate，xanthan gum and diatomite on EPS concrete was researched，based on shrinkage test and characterization of microstructure by the Scanning Electron Microscopy （SEM）. The results show that the sodium alginate，xanthan gum and diatomite can reduce the water loss rate and shrinkage of EPS concrete and improve the EPS concretes microstructure，so as to reduce the number of harmful holes，and improve the density.
Key words：EPS concrete，shrinkage property，sodium alginate，xanthan gum，diatomite，microstructure