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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (3): 792-800.

• ement and Concrete • Previous Articles     Next Articles

Mechanical Properties of UHPC with Zeolite Powder Replacing Part Silica Fume

LAN Bo, HE Zhihai, HU Haibo, WOLDERUFAEL Yirgalemfissiha, YANG Ying, HAN Xudong   

  1. College of Civil Engineering, Shaoxing University, Shaoxing 312000, China
  • Received:2020-09-02 Revised:2020-10-21 Online:2021-03-15 Published:2021-04-13

Abstract: Compared with silica fume, zeolite powder is a local mineral admixture with the low price. Zeolite powder was used to replace silica fume to prepare ultra-high performance concrete (UHPC). The effects of zeolite powder content, water to binder ratio and volume content of steel fiber on the mechanical properties of UHPC were studied. The results show that when part silica fume is replaced by zeolite powder, the 3 d strength are reduced. And with the increase of ages, zeolite powder with the replacement rate of 15% (mass fraction) increases the strength of UHPC, while zeolite powder with the replacement rate of 30% (mass fraction) has little effect on the strength. Zeolite powder improves the toughness of UHPC at the later ages. Although the increased water to binder ratio decreases the strength, there is no the significant increase of strength between UHPC with water to binder ratio of 0.16 and 0.14. The utilization of steel fiber with appropriate amount is helpful to improve the strength of UHPC with zeolite powder, and the optimal percentage range of volume content of steel fiber is 2.5%~3.0%.

Key words: ultra-high performance concrete (UHPC), zeolite powder, silica fume, steel fiber, water to binder ratio, strength

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