Effect of fine sand powder on the rheological properties of one-part alkali-activated slag semi-flexible pavement grouting materials

被引：29

作者：

Zhang, Shuai ^{[2
,3
]}

He, Yan ^{[2
,3
]}

Zhang, Honggang ^{[1
]}

Chen, Jie ^{[1
]}

Liu, Leping ^{[1
,4
]}

机构：

[1] Guangxi Transportat Sci & Technol Grp Co LTD, Guangxi Key Lab Rd Struct & Mat, Nanning 530007, Peoples R China

[2] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

[3] Guangxi Univ, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China

[4] Nanning Normal Univ, Coll Chem & Mat, Guangxi Key Lab Nat Polymer Chem & Phys, Nanning 530001, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2022年 / 333卷

基金：

中国国家自然科学基金;

关键词：

Alkali-activated slag grouting materials; Semi-flexible pavement; Rheological; Grouting saturation; Marshall stability; PERFORMANCE CEMENT PASTE;

D O I：

10.1016/j.conbuildmat.2022.127328

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Understanding the rheological properties of one-part alkali-activated slag grouting material(OAASGM) are very significant when it used as a semi-flexible pavement (SFP) grouting material. The fluidity, setting time, rheological properties, mechanical properties, grouting saturation, and Marshall stability of OAASGM with different content of fine sand powder were systematically evaluated. The results showed that fine sand powder can effectively prolong the setting time and improve the rheological properties of OAASGM. When the added amount of fine sand powder was 10% (OAASGM-10), the fluidity was 14 s, the operability time was 45 min, and the initial yield stress and plastic viscosity of OAASGM were 0.699 Pa and 1.997 Pa.s, respectively. Furthermore, it had the characteristics of shear thinning, so it did not bleed water segregation. The grouting saturation of the OAASGM-10 was as high as 91.89%, the Marshall stability of the corresponding composite material was 31.31 kN, and the flow value was 3.055 mm. These results meet the technical requirements of semi-flexible pavement (SFP), which are expected to be an alternative for cement as a SFP grouting materials.

引用

页数：8

共 33 条

[1] High strength fiber reinforced one-part alkali activated slag/fly ash binders with ceramic aggregates: Microscopic analysis, mechanical properties, drying shrinkage, and freeze-thaw resistance [J].