Effect of rice husk ash fineness on porosity and hydration reaction of blended cement paste

Weiting Xu; Yiu Tommy Lo; Dong Ouyang; Sharzim Ali Memon; Feng Xing; Weilun Wang; Xiongzhou Yuan

doi:10.1016/j.conbuildmat.2015.04.030

Effect of rice husk ash fineness on porosity and hydration reaction of blended cement paste

Weiting Xu
, Yiu Tommy Lo
, Dong Ouyang
, Sharzim Ali Memon
, Feng Xing
, Weilun Wang
, Xiongzhou Yuan

Research output: Contribution to journal › Article › peer-review

111 Citations (Scopus)

Abstract

An experimental investigation on the effect of grinding fineness of rice husk ash (RHA) on the mechanical, hydration and porosity properties of RHA blended paste was launched. Locally produced RHA with six different grinding durations of 5, 10, 30, 60, 90 and 120 min corresponding to mean particle size of 8.61, 8.15, 5.45, 6.25, 6.38 and 6.95 μm, respectively, were used in this study. The physical and chemical properties of the ground RHAs were determined and results show that variations in chemical composition of RHAs with different grinding fineness are small. The pastes with water binder ration of 0.4 and cement substitution of 10% by ground RHAs were tested. Comparisons between pastes with SF, and control paste (only with ordinary Portland cement) were also presented. Mechanical properties, hydration reaction and porosity of paste were investigated by compressive strength, thermogravimetric analysis (TGA) and environment scanning electron microscope (ESEM) plus Image Pro Plus software analysis, respectively. Results show that incorporation of 30-min grinding RHA exhibits a strong, high hydration and low porosity paste due to the better dispersion, filling effect and pozzolanic activity.

Original language	English
Pages (from-to)	90-101
Number of pages	12
Journal	Construction and Building Materials
Volume	89
DOIs	https://doi.org/10.1016/j.conbuildmat.2015.04.030
Publication status	Published - Apr 21 2015
Externally published	Yes

Funding

The authors greatly acknowledge the financial supports from the National Natural Science Foundation of China (Grant No. 51408363 , 51478207 and 51308344 ), the Project Funded by China Postdoctoral Science Foundation (Grant No. 2014M562210 and 2013M531875 ), the Natural Science Foundation of SZU (Grant No. 201421 ), and the Science Industry Trade and Information Technology Commission of Shenzhen Municipality (Grant No. GJHZ20120614144906248 ). We also thank the Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University for providing facilities and equipments.

Keywords

Grinding fineness
Hydration reaction
Porosity
Rice husk ash

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2015.04.030

Cite this

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title = "Effect of rice husk ash fineness on porosity and hydration reaction of blended cement paste",

abstract = "An experimental investigation on the effect of grinding fineness of rice husk ash (RHA) on the mechanical, hydration and porosity properties of RHA blended paste was launched. Locally produced RHA with six different grinding durations of 5, 10, 30, 60, 90 and 120 min corresponding to mean particle size of 8.61, 8.15, 5.45, 6.25, 6.38 and 6.95 μm, respectively, were used in this study. The physical and chemical properties of the ground RHAs were determined and results show that variations in chemical composition of RHAs with different grinding fineness are small. The pastes with water binder ration of 0.4 and cement substitution of 10\% by ground RHAs were tested. Comparisons between pastes with SF, and control paste (only with ordinary Portland cement) were also presented. Mechanical properties, hydration reaction and porosity of paste were investigated by compressive strength, thermogravimetric analysis (TGA) and environment scanning electron microscope (ESEM) plus Image Pro Plus software analysis, respectively. Results show that incorporation of 30-min grinding RHA exhibits a strong, high hydration and low porosity paste due to the better dispersion, filling effect and pozzolanic activity.",

keywords = "Grinding fineness, Hydration reaction, Porosity, Rice husk ash",

author = "Weiting Xu and Lo, \{Yiu Tommy\} and Dong Ouyang and Memon, \{Sharzim Ali\} and Feng Xing and Weilun Wang and Xiongzhou Yuan",

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doi = "10.1016/j.conbuildmat.2015.04.030",

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AU - Xu, Weiting

AU - Lo, Yiu Tommy

AU - Ouyang, Dong

AU - Memon, Sharzim Ali

AU - Xing, Feng

AU - Wang, Weilun

AU - Yuan, Xiongzhou

PY - 2015/4/21

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AB - An experimental investigation on the effect of grinding fineness of rice husk ash (RHA) on the mechanical, hydration and porosity properties of RHA blended paste was launched. Locally produced RHA with six different grinding durations of 5, 10, 30, 60, 90 and 120 min corresponding to mean particle size of 8.61, 8.15, 5.45, 6.25, 6.38 and 6.95 μm, respectively, were used in this study. The physical and chemical properties of the ground RHAs were determined and results show that variations in chemical composition of RHAs with different grinding fineness are small. The pastes with water binder ration of 0.4 and cement substitution of 10% by ground RHAs were tested. Comparisons between pastes with SF, and control paste (only with ordinary Portland cement) were also presented. Mechanical properties, hydration reaction and porosity of paste were investigated by compressive strength, thermogravimetric analysis (TGA) and environment scanning electron microscope (ESEM) plus Image Pro Plus software analysis, respectively. Results show that incorporation of 30-min grinding RHA exhibits a strong, high hydration and low porosity paste due to the better dispersion, filling effect and pozzolanic activity.

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KW - Hydration reaction

KW - Porosity

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Effect of rice husk ash fineness on porosity and hydration reaction of blended cement paste

Abstract

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Keywords

ASJC Scopus subject areas

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