Rice husk ash as both pozzolanic admixture and internal curing agent in ultra-high performance concrete

Van, Viet-Thien-An; Rößler, Christiane; Bui, Danh-Dai; Ludwig, Horst‐Michael

doi:10.1016/j.cemconcomp.2014.07.015

Cited by 226 publications

(69 citation statements)

References 15 publications

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“…As shown in Figure 9, the different concrete mixes used in this study are identified as C-Mix, R-10, R-15, and R-20 for control concrete without RHA, concrete containing 10% RHA, concrete containing 15% RHA, and concrete containing 20% RHA, respectively. In general, the variation of hydration temperature in thin sized samples remains very small and uniform among different samples (Amin et al, 2010;Viet-Thien-An et al, 2014). Therefore, the effect of thermal dilation on values of autogenous shrinkage was ignored.…”

Section: Compressive Strength Of Concrete With and Without Rhamentioning

confidence: 99%

“…These powder materials were found very effective in controlling autogenous shrinkage of HPCs due to their relatively smaller particle size, high specific surface area (SSA), mesoporous structure, and strong water absorbing ability (Huang and Zhang, 2015). Among them, the RHA is currently most commonly used internal curing agent to control shrinkage in HPCs (Tuan et al, 2010;Viet-Thien-An et al, 2014;Jianhui et al, 2017). However, contrary to this, it was found that the fine RHA resulted in increased autogenous shrinkage, even higher than the control concrete (Habeeb and Fayyadh, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Pozzolanic Reactivity and the Influence of Rice Husk Ash on Early-Age Autogenous Shrinkage of Concrete

et al. 2019

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In this study, the role of a locally available rice husk ash (RHA) in reducing early-age shrinkage of high performance concrete (HPC) after evaluating its pozzolanic reactivity was evaluated. The X-ray diffraction (XRD) and energy dispersive X-ray (EDX) analyses were performed after burning rice husk to 700 and 950 • C. Presence of relatively high deposits of amorphous siliceous phases in RHA at 700 • C indicated its pozzolanic potential. Subsequently, this RHA was ground to desired fineness, followed by sieving through sieve No. 200. Eventually, the fine RHA was used as a substitute of cement in different percentages (10, 15, and 20%) to evaluate its influence in mitigating autogenous shrinkage in concrete. Prismatic concrete beams (100 × 100 × 800 mm) were cast to measure autogenous shrinkage along with cylinders (150 mm dia. x 300 mm height) to test compressive strength of concrete. The results indicated a slight increase in compression strength with addition of 10% RHA, which however, reversed and slightly reduced in concretes containing 15 and 20% RHA. Unlike strength results, the trend of autogenous shrinkage was rather uniform as the rate as well as the amount of early-age autogenous shrinkage continued to decrease with increasing percentage of RHA. Moreover, despite of reduced rate during first 24 h, thereafter, the effect of 20% RHA on further reduction of autogenous shrinkage was insignificant and ended up only slightly lesser than the 15% RHA concrete at 7 days. Finally, the control cement sand mortar and mortar containing 15% RHA were cast to further validate the pozzolanic reactivity of RHA through scanning electron microscopy (SEM), EDX, and thermogravimetric analysis (TGA) tests. An observation of reduced amount of calcium hydroxide (Ca(OH) 2) in RHA mortar samples indicating its excellent pozzolanic potential when used as a partial substitute of cement in HPC.

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Section: Compressive Strength Of Concrete With and Without Rhamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pozzolanic Reactivity and the Influence of Rice Husk Ash on Early-Age Autogenous Shrinkage of Concrete

et al. 2019

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“…SCMs from agricultural wastes have been reported to be suitable for the production of normal, high and ultra-high strength concrete either in binary combination with PC or combined with other industrial SCMs (FA, SF) and PC (Zhang and Malhotra, 1996;Salas et al, 2009;Chatveera and Lertwattanaruk, 2011;Van Tuan et al, 2011;Megat Johari et al, 2012;Hussein et al, 2014;Van et al, 2014;Zareei et al, 2017;Arel and Aydin, 2018). Compressive strength values ranging from about 20 MPa to above 95 MPa have been reported at 28 days for RHA, POFA and/or SCBA with the values either lower, comparable to or higher than that of plain PC concrete (Ismail and Waliuddin, 1996;Chindaprasirt, Rukzon and Sirivivatnanon, 2008;Ramezanianpour, Mahdi and Ahmadibeni, 2009;Chao-Lung, Anh-Tuan and Chun-Tsun, 2011;Rukzon and Chindaprasirt, 2012;Megat Johari et al, 2012;Van et al, 2014;Bahurudeen et al, 2015). Also, these SCMs have better strength at early ages compared to fly ash.…”

Section: Mechanical Behaviour Of Scms In Concretementioning

confidence: 99%

Sustainable use of supplementary cementitious materials from agricultural wastes - a review

Fadele¹,

Otieno²

2019

Sustainable Construction Materials and Technologies (SCMT)

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This paper presents a critical literature review on the use of supplementary cementitious materials (SCMs) from agricultural wastes (mainly from crop residues) in cementitious systems. The current utilisation of these materials as partial replacement of Portland cement (PC) is reviewed with respect to the materials' characteristic influence on performance and limit of replacement in cementitious systems. In-spite of the benefits of SCMs from agricultural wastes (such as rice husk ash, palm oil fuel ash, sugarcane bagasse ash), their heterogeneous nature coupled with insufficient data make it difficult to generalise their performance. Therefore, unravelling the relationship between the influence of the processing method and materials characteristics on the limit of replacement and performance in cementitious systems is essential to their standardisation and sustainable utilisation. This, coupled with the reproducibility of results will assist the processing and adoption of other agricultural wastes in cementitious systems.

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“…granulated blast furnace slag (GGBS) and fly ash (FA) as cement replacement materials in UHPFRCC is possible [8][9][10]. Some waste materials such as rice husk ash [11,12] and palm oil fuel ash [5,13] have been used as well.…”

Section: Introductionmentioning

confidence: 99%

Properties of ultra-high performance fiber reinforced cementitious composites made with gypsum-contaminated aggregates and cured at normal and elevated temperatures

Gesoğlu

Güneyisi

Nahhab

et al. 2015

Construction and Building Materials

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Rice husk ash as both pozzolanic admixture and internal curing agent in ultra-high performance concrete

Cited by 226 publications

References 15 publications

Pozzolanic Reactivity and the Influence of Rice Husk Ash on Early-Age Autogenous Shrinkage of Concrete

Pozzolanic Reactivity and the Influence of Rice Husk Ash on Early-Age Autogenous Shrinkage of Concrete

Sustainable use of supplementary cementitious materials from agricultural wastes - a review

Properties of ultra-high performance fiber reinforced cementitious composites made with gypsum-contaminated aggregates and cured at normal and elevated temperatures

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