Microstructure and Nanoscaled Characterization of HVFA Cement Paste Containing Nano-SiO2 and Nano-CaCO3

Shaikh, Faiz Uddin Ahmed; Supit, Steve W.M.; Barbhuiya, Salim

doi:10.1061/(asce)mt.1943-5533.0001898

Cited by 29 publications

(11 citation statements)

References 25 publications

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“…Other replacement rates (2% and 3%) of nano CaCO 3 were not included in this testing since compressive testing results positively indicated an optimum replacement rate of 1%. This decision was also aided by several other studies [ 37 , 44 ].…”

Section: Resultsmentioning

confidence: 95%

Mechanical and Durability Properties of Portland Limestone Cement (PLC) Incorporated with Nano Calcium Carbonate (CaCO3)

2021

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Despite lower environmental impacts, the use of Portland Limestone Cement (PLC) concrete has been limited due to its reduced later age strength and compromised durability properties. This research evaluates the effects of nano calcium carbonate (CaCO3) on the performance of PLC concrete. The study follows a series of experiments on the fresh, hardened, and durability properties of PLC concrete with different replacement rates of nano CaCO3. Incorporation of 1% nano CaCO3 into PLC concrete provided the optimal performance, where the 56 days compressive strength was increased by approximately 7%, and the permeability was reduced by approximately 13% as compared to Ordinary Portland Cement (OPC) concrete. Further, improvements were observed in other durability aspects such as Alkali-Silica Reaction (ASR) and scaling resistance. Additionally, nano CaCO3 has the potential to be produced within the cement plant while utilizing the CO2 emissions from the cement industries. The integration of nanotechnology in PLC concrete thus will help produce a more environment-friendly concrete with enhanced performance. More in-depth study on commercial production of nano CaCO3 thus has the potential to offer a new generation cement—sustainable, economical, and durable cement—leading towards green infrastructure and global environmental sustainability.

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Section: Resultsmentioning

confidence: 95%

Mechanical and Durability Properties of Portland Limestone Cement (PLC) Incorporated with Nano Calcium Carbonate (CaCO3)

2021

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“…e reduction of alite peaks and belite peaks indicates the formation of hydration products in specimens. It is recognized that the peak intensity of CH is related to C-S-H produced by pozzolanic reaction of mineral admixture at later ages [32]. e decrease of CH intensity indicates the increase of C-S-H formed by pozzolanic reaction at later ages.…”

Section: Resultsmentioning

confidence: 99%

“…e third weight loss, observed between 400 and 500°C, corresponds to the dehydroxylation of CH. e CH content can be calculated according to Taylor's formula [32]. e results are listed in Table 3.…”

Section: Dtg-tg Analysismentioning

confidence: 99%

“…Recently, the use of calcium carbonate nanoparticles (NC) in cementitious materials has received great interest among researchers [27][28][29][30][31]. e effects of NC on the performances of cementitious materials containing FA have been extensively reported [32][33][34][35][36]. NC is considered to be a good candidate for accelerating hydration of cement in FA mortar.…”

Section: Introductionmentioning

confidence: 99%

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Research of Mortar Containing Phosphorous Slag and Calcium Carbonate Nanoparticles

Yang

Che

2019

Advances in Materials Science and Engineering

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Ground phosphorous slag (PS) has not been widely used in construction due to its negative effects on the early-age performances of cementitious materials. The effects of calcium carbonate nanoparticles (NC) on strength development of mortar containing high content of PS were investigated at different curing ages. The NC was incorporated at 2% as partial mass replacements for binder. Hydration products and microstructure characterization was examined by X-ray diffraction (XRD), differential thermal gravity (DTG), thermogravimetric (TG), and scanning electron microscopy (SEM) analysis. Test results showed that NC improved both flexural and compressive strength of mortar containing high content of PS at 7, 28, 56, and 90 days. XRD, DTG-TG, and SEM analysis confirmed the filling effect of NC. Furthermore, the formation of the carboaluminate even at later age also improved the microstructure of mortar, which created a denser microstructure.

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“…Metakaolin gave the most enhancing effect as a replacement material to cement on mechanical and microstructural properties of SCC at all ages. Faiz et al (2017), studied the properties and microstructures of high volume fly ash cement paste incorporating with nano CaCO3 and nano silica particles, nanoidentation results indicated the pozzolanic reaction, where the addition of 2% nano silica and 1% nano CaCO3 increased the volume fraction of C-S-H gel and reduced the porosity [13]. Nanostructure showed that the high strength and high durable concrete can produce lower repair and maintains the requirements for concrete structure.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Self-compacting High Performance Concrete Containing Calcined Kaolin Clay and Nano Lime

Kadhum

Owaid

2020

Civ Eng J

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The aim of this research is to investigate the effect of pozzolanic materials and nano particles on improve the strength characteristic by the properties of a self-compacting high-performance concrete that includes calcined clay with nano lime. In this study, two blends systems are worked on, they are the binary and the ternary systems. For binary mixtures, test samples were prepared from 5% CC, 10% CC, 15% CC and 3% NL by partial replacement of the cement weight. While ternary mixtures, samples were prepared from 5% CC 3% NL, 10% CC 3% NL and 15% CC 3% NL by partial substitution of cement weight. The tests conducted on mixes are fresh tests like slump flow diameter, V-funnel, L-box, and segregation resistance. The compressive strength test was determined at 7, 28 and 56 days. While splitting tensile strength tests at 7 and 28 days from the SCHPC produced in the study. It was concluded that the replacement of CC and NL in SCHPC binary mixes reduced the fresh results enough for SCHPC production and gave a general improvement in the compressive strength and splitting tensile strength properties of the SCHPC mixture. SCHPC with 10% CC partial replacement of cement showed higher values of compressive and splitting tensile strength, compared to the reference mixture of SCHPC for all days, thus it was considered the best. Whereas, the strength of the concrete mixtures in the ternary cement mixtures was better than the strength of the mixing and control mortar systems for the same replacement levels in 7 , 28 and 56 days.

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Microstructure and Nanoscaled Characterization of HVFA Cement Paste Containing Nano-SiO2 and Nano-CaCO3

Cited by 29 publications

References 25 publications

Mechanical and Durability Properties of Portland Limestone Cement (PLC) Incorporated with Nano Calcium Carbonate (CaCO3)

Mechanical and Durability Properties of Portland Limestone Cement (PLC) Incorporated with Nano Calcium Carbonate (CaCO3)

Research of Mortar Containing Phosphorous Slag and Calcium Carbonate Nanoparticles

Experimental Investigation of Self-compacting High Performance Concrete Containing Calcined Kaolin Clay and Nano Lime

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