Comparative study of pozzolanic and filler effect of rice husk ash on the mechanical properties and microstructure of brick aggregate concrete

Noaman, Md. Abu; Karim, Md. Rezul; Islam, Md. Nazrul

doi:10.1016/j.heliyon.2019.e01926

Cited by 58 publications

(23 citation statements)

References 30 publications

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“…The next image on the right shows different colors denoting every single pore which generates the next pore size segmental image on the right. The pore space segmentation characterization is an important method to understand the mechanical properties of concrete [35,[59][60][61][62][63]. Table 8 shows the output of MATLAB Analysis of different images of NS and RHA.…”

Section: Original Image Binary Segmentationmentioning

confidence: 99%

Experimental Investigation and Image Processing to Predict the Properties of Concrete with the Addition of Nano Silica and Rice Husk Ash

Avudaiappan

Prakatanoju²,

Amran

et al. 2021

Crystals

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The use of the combination of ultrafine rice husk ash (RHA) and nano silica (NS) enhances the compactness of hardened concrete, but there is still a lack of studies that address the effects of NS and RHA on the workability, mechanical properties and pore microstructure of concrete. This study mainly aims to investigate the influence of the pore size distribution in multiphysics concrete model modified by NS and RHA and to determine the workability and mechanical properties of concrete with NS and RHA. In this work, NS and RHA were used as 0, 5, 10, 15 and 20% replacements of ordinary Portland cement (OPC) in concrete grade M20. Concrete mixed with NS and RHA showed improved performance for up to 10% addition of NS and RHA. Further addition of NS and RHA showed a decrease in performance at 7, 14 and 28 days. The decrease in concrete porosity was also found to be up to 10% when adding NS and RHA to cement. Image processing was performed on the cement-based materials to describe the microstructure of the targeted material without damage. The results from the experimental and tomography images were utilized to investigate the concrete microstructure and predict its inner properties.

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Section: Original Image Binary Segmentationmentioning

confidence: 99%

Experimental Investigation and Image Processing to Predict the Properties of Concrete with the Addition of Nano Silica and Rice Husk Ash

Avudaiappan

Prakatanoju²,

Amran

et al. 2021

Crystals

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“…Type-I ordinary Portland cement (OPC) was used in this experiment [ 21 ]. In addition, blast furnace slag (BFS) and silica fume (SF) were used to give a filler effect for increasing the strength of concrete [ 22 , 23 ]. The 100 MPa of concrete was used in this experiment.…”

Section: Materials and Experimental Programmentioning

confidence: 99%

Performance Assessment of the Post-Tensioned Anchorage Zone Using High-Strength Concrete Considering Confinement Effect

et al. 2021

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Post-tensioned anchorage zones need enough strength to resist large forces from jacking forces from prestress and need spiral reinforcement to give confinement effect. High-strength concrete (HSC) has high-strength and brings the advantage of reducing material using and simplifying reinforcing. We tested strain stabilization, load–displacement, and strain of lateral reinforcements. Specimens that used one and two lateral reinforcements without spiral reinforcement did not satisfy the strain stabilization. Load capacity also did not satisfy the condition of 1.1 times the nominal tensile strength of PS strands presented in ETAG 013. On the other hand, specimens that used three and four lateral reinforcements without spiral reinforcement satisfied the strain stabilization but did not satisfy 1.1 times the nominal tensile strength of PS strands. However, the secondary confinement effect could be confirmed from strain stabilization. In addition, the affection of HSC characteristics could be confirmed from a reinforcing level comparing other studies. The main confinement effect could be confirmed from the reinforcement strain results; there was a considerable difference between with and without spiral reinforcement at least 393 MPa. Comprehensively, main and secondary confinement effects are essential in post-tensioned anchorage zones. In addition, the performance of the anchorage zone could be increased by using HSC that the combination of high-strength and confinement effect.

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“…Research [13] of the pozzolanic effect and the filler effect of the rice husk ash on the mechanical properties and microstructure of a brick aggregate concrete showed that the compressive strength, due to filler effect, are 58.56 -94.62 % less compared to the pozzolanic effect for the 10 -25 wt. % replacement of the cement.…”

Section: Introductionmentioning

confidence: 99%

“…The tensile strength and flexural strength of the brick aggregate concrete due to the pozzolanic effect are 60 -150 % and 25 -150 % higher than that of the filler effect for the 10 -25 wt. % replacement of cement, respectively [13].…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Pozzolanic Activity of Different Micro-Fillers on Portland Cement Hydration

Kaminskas¹

2020

Ceramics - Silikaty

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This study estimates the influence of the different pozzolanic activity micro-fillers on the hydration of Portland cement. Cements with binary blends of ordinary Portland cement and different micro-fillers (15 % by mass) were developed and their characteristics were investigated in terms of the fineness, chemical composition, mineral composition, setting time, particle distribution, hydration heat, water demand, changes in the mineral composition during the hydration, and the compressive strength. All the specific properties of the blended cement pastes were compared with the pure Portland cement paste. The study showed that the investigated micro-fillers (except for quartz sand) increase the initial hydration of the Portland cement. In addition to this, the inert limestone micro-filler mainly affects the initial hydration of the calcium silicates, whereas the pozzolanic active micro-fillers (calcined mica and kaolinitic clay and its mixture) affect both processes: the initial hydration of the calcium silicates and the reaction of the aluminate-bearing phase with the gypsum. The inert microfillers (especially limestone) are more effective at the early stage of hardening (up to 7 days), but later, after 28 days, the compressive strength of the samples directly depends on the activity of the micro-fillers. All investigated pozzolanic active micro-fillers promote the formation of the calcium silicate hydrates, however, only in the samples with the most active (kaolinitic clay) micro-filler after 28 days of hardening clearly identifies the pozzolanic reaction. In contrast to the active micro-fillers, the inert micro-fillers increase the amount of portlandite in the hardened cement paste.

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Comparative study of pozzolanic and filler effect of rice husk ash on the mechanical properties and microstructure of brick aggregate concrete

Cited by 58 publications

References 30 publications

Experimental Investigation and Image Processing to Predict the Properties of Concrete with the Addition of Nano Silica and Rice Husk Ash

Experimental Investigation and Image Processing to Predict the Properties of Concrete with the Addition of Nano Silica and Rice Husk Ash

Performance Assessment of the Post-Tensioned Anchorage Zone Using High-Strength Concrete Considering Confinement Effect

The Effect of the Pozzolanic Activity of Different Micro-Fillers on Portland Cement Hydration

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