The Application of Electrical Parameters to Reflect the Hydration Process of Cement Paste with Rice Husk Ash

Wang, Hui; Hu, Lingxuan; Cao, Peng; Luo, Baoxin; Tang, Jing; Shi, Feiting; Yu, Jinyan; Li, Hongjie; Jin, Kaikai

doi:10.3390/ma12172815

Cited by 23 publications

(7 citation statements)

References 34 publications

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“…Meanwhile, the incorporation of grounded RHA was found to increase the electrical resistivity at 14 days of curing and this was mostly by reason of pozzolanic activity of the RHA that generally fills the pores with additional C-S-H gel [158]. The electrical resistivity of the RHA concrete was also found to be low at 7 days of curing (since the pozzolanic reaction is very slow) and the resistance increases at 28 and 90 days of curing period with respect to the control mixture [159]. Meanwhile, concrete made with RHA and nano-TiO 2 (NT) was found to have an even higher resistivity than the control concrete (within 5 and 10 kΩ cm) [54].…”

Section: Electrical and Thermal Conductivitymentioning

confidence: 95%

“…The samples were stored in watertight cups with CaCl 2 as a sorbent after which the watertight cup was put at a consistent relative humidity and temperature in a controlled environment. The samples were weighed at 24 h to check the amount of moisture diffused [159]. The water vapor diffusion resistance factor was seen to decline in concrete with a higher content of RiH [93].…”

Section: Electrical and Thermal Conductivitymentioning

confidence: 99%

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Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications

et al. 2021

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In the last few decades, the demand for cement production increased and caused a massive ecological issue by emitting 8% of the global CO2, as the making of 1 ton of ordinary Portland cement (OPC) emits almost a single ton of CO2. Significant air pollution and damage to human health are associated with the construction and cement industries. Consequently, environmentalists and governments have ordered to strongly control emission rates by using other ecofriendly supplemental cementing materials. Rice husk is a cultivated by-product material, obtained from the rice plant in enormous quantities. With no beneficial use, it is an organic waste material that causes dumping issues. Rice husk has a high silica content that makes it appropriate for use in OPC; burning it generates a high pozzolanic reactive rice husk ash (RHA) for renewable cement-based recyclable material. Using cost-effective and commonly obtainable RHA as mineral fillers in concrete brings plentiful advantages to the technical characteristics of concrete and to ensure a clean environment. With RHA, concrete composites that are robust, highly resistant to aggressive environments, sustainable and economically feasible can be produced. However, the production of sustainable and greener concrete composites also has become a key concern in the construction industries internationally. This article reviews the source, clean production, pozzolanic activity and chemical composition of RHA. This literature review also provides critical reviews on the properties, hardening conditions and behaviors of RHA-based concrete composites, in addition to summarizing the research recent findings, to ultimately produce complete insights into the possible applications of RHA as raw building materials for producing greener concrete composites—all towards industrializing ecofriendly buildings.

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Section: Electrical and Thermal Conductivitymentioning

confidence: 95%

Section: Electrical and Thermal Conductivitymentioning

confidence: 99%

Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications

et al. 2021

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“…At the same time, it has been known that steel slag has relative low content of reactive glassy phases. e phase composition of steel slag is somewhat different from other supplementary materials, like fly ash, rice husk ash [27], and ground blast furnace slag, which have relatively high glassy phases and are beneficial for the further pozzolanic reaction and microstructure densification. e long-term benefits for pore structure from pozzolanic reaction of steel slag may be strong enough.…”

Section: Introductionmentioning

confidence: 99%

Fluid Permeability of Ground Steel Slag-Blended Composites Evaluated by Pore Structure

Yang

Jian

et al. 2020

Advances in Materials Science and Engineering

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The resource utilization of steel slag has attracted wide attention. In the present work, the pore structure of cement paste with and without ground basic oxygen furnace slag (BOFS) up to 180 days was investigated by mercury intrusion porosimetry. Permeability was evaluated from the tested pore structure. Results indicate that the porosity, critical pore radius, pore-throat radius, and permeability are increased with the BOFS content and levels off after 28 days. Lower gel porosity and higher coarse capillary porosity were observed in BOFS-blended composites. The calculated permeability (around 0.30–7.49 × 10−19 m2) based on the pore structure agrees well with the range of reported experimental measurements. Well-correlated linear and power-law relationship was noticed between permeability and porosity and characteristic pore radius, respectively.

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“…Meanwhile, the rice husk ash is produced by burning rice husk. A large amount of carbon dioxide gas will be produced during the production [12,13]. Additionally, commonly used mineral admixtures are in short supply, thus the prices are rising with time.…”

Section: Introductionmentioning

confidence: 99%

Influence of Dolomite Rock Powder and Iron Tailings Powder on the Electrical Resistivity, Strength and Microstructure of Cement Pastes and Concrete

et al. 2022

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Dolomite rock powder (the waste stone residue in the production of machine-made sand and stone processing) and iron tailings powder formed by mineral processing industry are solid wastes, which occupy land resources, pollute the environment and release toxic substances without reasonable processing. The dolomite rock powder and iron tailings powder composing a large number of active substances could be advantageous to the cement-based materials. In this study, the electrical resistivity of cement paste and concrete was measured. Meanwhile, the influence of dolomite rock powder and iron tailings powder on the compressive strength of concrete was investigated. The electric flux of concrete was determined to estimate the chloride ion permeability. The scanning electron microscope (SEM) and X-ray diffraction were obtained to investigate the hydration of cement paste. Results showed the electrical resistivity of all specimens presented in this order: specimens with iron tailings < specimens with dolomite rock powder < blank specimens < specimens with ground granulated blast-furnace slag (GGBS) < specimens with fly ash. The correlation between electrical resistivity and curing age of cement paste or concrete has been deduced as a quadratic function. The addition of GGBS could improve the compressive strength of concrete. Meanwhile, when the other three types of mineral admixtures were added, 5% by mass ratio of the total binder materials was the optimum for the compressive strength. The curing ages, the fly ash, the GGBS and 5% dolomite rock powder or 5% iron tailings powder demonstrated a positive effect on the chloride ion impermeability. However, when higher dosages of dolomite rock powder or iron tailings powder were added, the effect was the opposite. Finally, the compactness of the microstructure and the Ca(OH)2 of cement paste could be improved by a small dosage of dolomites or iron tailings (less than 5%).

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The Application of Electrical Parameters to Reflect the Hydration Process of Cement Paste with Rice Husk Ash

Cited by 23 publications

References 34 publications

Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications

Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications

Fluid Permeability of Ground Steel Slag-Blended Composites Evaluated by Pore Structure

Influence of Dolomite Rock Powder and Iron Tailings Powder on the Electrical Resistivity, Strength and Microstructure of Cement Pastes and Concrete

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