The use of rice husk ash as reactive filler in ultra-high performance concrete

The use of rice husk ash as reactive filler in ultra-high performance concrete. Kang, S., Hong, S., & Moon, J. Cement and Concrete Research, 115:389–400, January, 2019.

Paper doi abstract bibtex

In this study, rice husk ash (RHA)-based reactive ﬁller was used in ultra-high performance concrete (UHPC) to improve mechanical properties without heat-treatment. This strategy replaces inert quartz ﬁller with the reactive RHA ﬁller, to increase the amorphous silica content while maintaining the physical role of the micron-sized quartz ﬁller. Due to the high porosity of RHA, internal curing is eﬀective, which promotes the hydration reaction over a long period of time. Experimental results show an outstanding strength around 200 MPa after 91 days, under ambient conditions (20 °C and 60% relative humidity). This was possible due to the promotion of pozzolanic reaction by additional water and amorphous silica provided by the porous (i.e., internal curing eﬀect) and reactive ﬁller, respectively; hence, the volume of capillary pores was reduced. The result reported herein will further promote the utilization of agricultural byproduct for the development of reactive RHA-based construction materials.

@article{kang_use_2019,
	title = {The use of rice husk ash as reactive filler in ultra-high performance concrete},
	volume = {115},
	issn = {00088846},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S0008884618302795},
	doi = {10.1016/j.cemconres.2018.09.004},
	abstract = {In this study, rice husk ash (RHA)-based reactive ﬁller was used in ultra-high performance concrete (UHPC) to improve mechanical properties without heat-treatment. This strategy replaces inert quartz ﬁller with the reactive RHA ﬁller, to increase the amorphous silica content while maintaining the physical role of the micron-sized quartz ﬁller. Due to the high porosity of RHA, internal curing is eﬀective, which promotes the hydration reaction over a long period of time. Experimental results show an outstanding strength around 200 MPa after 91 days, under ambient conditions (20 °C and 60\% relative humidity). This was possible due to the promotion of pozzolanic reaction by additional water and amorphous silica provided by the porous (i.e., internal curing eﬀect) and reactive ﬁller, respectively; hence, the volume of capillary pores was reduced. The result reported herein will further promote the utilization of agricultural byproduct for the development of reactive RHA-based construction materials.},
	language = {en},
	urldate = {2019-11-14},
	journal = {Cement and Concrete Research},
	author = {Kang, Sung-Hoon and Hong, Sung-Gul and Moon, Juhyuk},
	month = jan,
	year = {2019},
	pages = {389--400},
}

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