Long-term performance of concrete using additives

Devi, Kiran; Saini, Babita; Aggarwal, Paratibha

doi:10.1504/ijmmp.2020.104612

Cited by 2 publications

(3 citation statements)

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“…It has been observed from figure 3 (b) that addition of SSP increased the sulphate resistance of concrete specimens by filling voids and formation of a dense matrix as compared to control mix i.e. Figure 3 a [4,25]. The marble dust on soil not only improved the geotechnical properties by forming compacted matrix consequently voids decreased and improved the pore size distribution and inter particles bonding [26].…”

Section: Semmentioning

confidence: 99%

“…On the other hand, lesser amount or absence of sulphur (S) indicates the lesser amount of mono-sulphate and ettringite which was responsible for reduction of strength. The lower values of Ca/Si ratio indicate the improvement in CS by forming CSH and consumption of CH during pozzolanic reaction [25]. Under the exposure to sulphate attack, magnesium sulphate reacted with CSH (calcium silicate hydrate) or CH (calcium hydroxide) and formed MSH (magnesium silicate hydrate) and Mg(OH) 2 (magnesium hydroxide).…”

Section: Edsmentioning

confidence: 99%

“…Brucite and gypsum were obtained when magnesium reacts with Mg(OH) 2 . The mix with SSP (7.5%) had a lower content of magnesium (Mg) which represent a lesser amount of brucite and M-S-H formation that increased the strength in proportion to control mix [4,25].…”

Section: Edsmentioning

confidence: 99%

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Micro-structural analysis of cement composites using stone waste: A review

Devi

Saini²,

Aggarwal³

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The direct disposal of industrial by-products to environment is the potential threat to the ecosystem. A possible solution can be utilization of these materials into construction industries to counteract the consumption of cement. Along with the strength and durability properties, study of micro-structural properties of concrete is equally important. The microstructure of concrete largely depends on the type of cement, admixtures, water-cement ratio and curing age. To characterize and quantify the hydration products i.e., calcium silicate hydrate, calcium hydroxide etc. of cement based materials, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) etc. techniques are being used worldwide. XRD is a powerful tool for the identification of chemical compounds present in the cement-based materials. SEM reveals the information about external morphology, chemical composition, crystalline structure and orientation of the material. EDS is an analytical technique that can be coupled with SEM and used to determine the elemental composition. A critical review of microstructural analysis using above mentioned techniques for mortar and concrete using stone waste has been done. It was found that these techniques are capable to address the morphological and crystalline structure along with chemical elements and compounds of the materials; and can also be correlated with strength and durability properties. The micrographs showed stone waste, being a filler material aid in forming the dense matrix by filling the voids. Elemental analysis coheres to the chemical compounds (calcium oxide, silica dioxide, etc.) present in the mortar and concrete specimens corresponding to micrographs images.

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Section: Semmentioning

confidence: 99%

Section: Edsmentioning

confidence: 99%