Effect of spherical silica fume and fly ash on the rheological property, fluidity, setting time, compressive strength, water resistance and drying shrinkage of magnesium ammonium phosphate cement

被引：73

作者：

Dong, Dong ^{[1
]}

Huang, Yongbo ^{[1
]}

Pei, Yan ^{[2
]}

Zhang, Xiaoyang ^{[3
]}

Cui, Na ^{[4
]}

Zhao, Piqi ^{[1
]}

Hou, Pengkun ^{[1
]}

Lu, Lingchao ^{[1
]}

机构：

[1] Univ Jinan, Shandong Prov Key Lab Preparat & Measurement Bldg, Jinan 250022, Peoples R China

[2] Shandong Univ, Geotech & Struct Engn Res Ctr, Sch Civil Engn, Jinan 250061, Peoples R China

[3] Shandong Shanlv Environm New Mat Co LTD, Zibo 255000, Peoples R China

[4] Univ Jinan, Sch Civil Engn & Architecture, Jinan 250022, Peoples R China

来源：

JOURNAL OF BUILDING ENGINEERING | 2023年 / 63卷

关键词：

Magnesium ammonium phosphate cement; Spherical silica fume; Spherical fly ash; Viscosity; Water resistance; BASALT FIBER; STABILITY; REPAIR; PASTE;

D O I：

10.1016/j.jobe.2022.105484

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Due to the high bonding strength, Magnesium ammonium phosphate cement (MAPC) is suitable for the crack repair. However, the fast initial hydration rate, high viscosity and poor water resis-tance hinder its application in the crack repairing engineering. To solve the above problems, the spherical silica fume and fly ash were added into MAPC. The effects of spherical silica fume and fly ash on the rheological property, fluidity, setting time, compressive strength, water resistance and drying shrinkage of MAPC were studied. The results showed that both spherical silica fume and fly ash could reduce the plastic viscosity of MAPC and prolong the setting time. Spherical fly ash could improve the fluidity of MAPC. The late-age strength and water resistance of MAPC were increased and the drying shrinkage was reduced by adding spherical silica fume and fly ash. Therefore, it is concluded that the addition of spherical silica fume and fly ash into MAPC makes it more available to be applied in the crack repairing engineering.

引用

页数：16

共 40 条

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