Investigation into the use of unground rice husk ash to produce eco-friendly construction bricks

Hwang, Chao‐Lung; Huynh, Trong‐Phuoc

doi:10.1016/j.conbuildmat.2015.04.061

Cited by 107 publications

(43 citation statements)

References 23 publications

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“…This phenomenon may be explained by the continuous reaction between the aluminosilicate sources and the alkaline solution along with curing age, with greater reaction completeness associated with an increasingly dense structure due to the filling of internal pores with binder gel as a result of geopolymerization. Previously published works support this . Additionally, the brick samples with various ratios of RHA developed strength differently from one another, as presented in Figure .…”

Section: Resultssupporting

confidence: 73%

Effect of residual rice husk ash on mechanical‐microstructural properties and thermal conductivity of sodium‐hydroxide‐activated bricks

Huynh

Hwang

Lin

et al. 2017

Env Prog and Sustain Energy

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This research compares the mechanical‐microstructural properties and thermal conductivity of the solid, green construction bricks that contain different percentages of sodium‐hydroxide‐activated residual rice husk ash and class‐F fly ash. The brick specimens were prepared following the guidelines of Vietnamese national standard in term of mixing, forming, and curing. Various percentages of rice husk ash (0%, 10%, 20%, 30%, 40%, and 50%) were added to a standard brick mixture in order to evaluate the influence of rice husk ash content on the strength development, void volume, water absorption capacity, bulk density, and thermal conductivity of the hardened bricks. Moreover, scanning electron microscopy was used to characterize surface morphologies of the brick samples. Further, the suitability of using a binder of rice husk ash and fly ash to produce alkali‐activated construction bricks was investigated. The bricks that were produced demonstrated generally good engineering performance and conformed to the relevant Vietnamese codes. Of particular note, the addition of rice husk ash influenced the properties of the bricks significantly, with brick strength peaking at a rice husk ash content of 10% and decreasing progressively at higher percentages. The findings from the present study support the efficacy of using a binder that contains rice husk ash and fly ash to produce green alkali‐activated construction bricks. © 2017 American Institute of Chemical Engineers Environ Prog, 37: 1647–1656, 2018

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Section: Resultssupporting

confidence: 73%

Effect of residual rice husk ash on mechanical‐microstructural properties and thermal conductivity of sodium‐hydroxide‐activated bricks

Huynh

Hwang

Lin

et al. 2017

Env Prog and Sustain Energy

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“…Based on this finding, research has been directed toward the production of alternative silicates to make the geopolymer production process more environmentally sustainable . Several studies have focused on the use of secondary sources of silica that can be obtained from industrial byproducts, such as silica fume (SF), rice husk ash (RHA) and other wastes …”

Section: Introductionmentioning

confidence: 99%

Mechanical and microstructural analysis of geopolymer composites based on metakaolin and recycled silica

Villaquirán-Caicedo

Gutiérrez

2018

J Am Ceram Soc

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This paper evaluated mechanical and thermal stability of alkali‐activated materials obtained from metakaolin and alternative silica sources, such as rice husk ash (RHA) and silica fume (SF), and were reinforced with recycled ceramic particles (RP) obtained by grinding bricks. Specimens were produced, and after 7 days of curing, they were exposed to temperatures between 300 and 1200°C to determine the influence that different percentages of RP had on the mechanical behavior and microstructure of the produced composites. The results showed a reduction in the linear contraction by 10.22% with 20 wt% RP and that the reinforcing materials improved the mechanical performance of the geopolymers after exposure to high temperatures; the compressive strengths reached 137.7 (±11.4) MPa after being exposed to 1200°C for the matrix based on RHA and 180.6 (±19.15) MPa after being reinforced with 20 wt% RP. The improvement was mainly due to densification and the formation of crystalline products such as leucite, kalsilite, and mullite.

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“…Namun setelah dijadikan abu, kandungan silika akan meningkat menjadi > 90%, silika banyak digunakan sebagai adsorben. Disamping komponen utama silika, dalam abu sekam padi juga terdapat senyawa lain seperti CaO, MgO, Al 2 O 3 ,NaO, SiO 2 , K 2 O, Na 2 O, and Fe 2 O 3 yang dapat diaplikasikan sebagai bata (Hwang & Huynh 2015), semen (Shan Bie, et al 2016), dan untuk penghilangan ion Cr 6+ dari larutannya. (Georgieva, et al, 2015) Membran ultrafiltrasi dan reverse osmosis merupakan jenis membran dengan driving force perbedaan tekanan.…”

Section: Pendahuluanunclassified

Aplikasi Berbagai Jenis Adsorben Pada Pengolahan Air Asam Tambang Sintetik Skala Mini Plant

Nasir¹,

Permatahati²,

Musdalipah³

et al. 2016

ETHOS (Jurnal Penelitian dan Pengabdian)

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PendahuluanDampak negatif dari industri pertambangan terhadap lingkungan salah satunya adalah adanya air asam tambang. Metode pengolahan air asam tambang yang banyak dilakukan di Indonesia adalah dengan penambahan kapur, yang salah satu kekurangannya adalah biaya yang cukup tinggi dan perlu adanya pengolahan lanjutan terhadap sedimentasi persenyawaan kapur didasar kolam pengolahan. Penelitian ini mencoba memanfaatkan berbagai adsorben yang murah (low-cost) dan kebanyakan merupakan limbah padat seperti abu terbang batubara, tanah diatom (diatomit), dan abu sekam padi yang dirangkai seri dengan unit pengolahan sand filtrasi, ultrafiltrasi, dan reverse osmosis. Air asam tambang atau acid mine drainage (AMD) terbentuk karena kegiatan pertambangan disebabkan oleh mineral-mineral sulfida terutama Pyrite (FeS 2 ) yang terkandung dalam batubara (Skousen, 1998

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Investigation into the use of unground rice husk ash to produce eco-friendly construction bricks

Cited by 107 publications

References 23 publications

Effect of residual rice husk ash on mechanical‐microstructural properties and thermal conductivity of sodium‐hydroxide‐activated bricks

Effect of residual rice husk ash on mechanical‐microstructural properties and thermal conductivity of sodium‐hydroxide‐activated bricks

Mechanical and microstructural analysis of geopolymer composites based on metakaolin and recycled silica

Aplikasi Berbagai Jenis Adsorben Pada Pengolahan Air Asam Tambang Sintetik Skala Mini Plant

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