Characterization of paste microstructure for durability properties of concrete

Sharma, Achintyamugdha; Angadi, Prokshit; Sirotiak, Todd; Wang, Xuhao; Taylor, Peter C.; Borowicz, Paweł; Payne, Scott

doi:10.1016/j.conbuildmat.2020.118570

Cited by 11 publications

(2 citation statements)

References 38 publications

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“…Therefore, most commercial and residential concrete projects specify using of the WRep. They are principally functional for long-lasting protection of the high-consequence RCIs like bridges, dams, flyovers, multistory reinforced concrete buildings so on in a highly corrosive environment [3]. Cement-based coatings are also practiced in making the concrete impermeable to moisture or aggressive ions, and they plug the pores and capillaries of the RCIs [4].…”

Section: Introductionmentioning

confidence: 99%

The anti-degradation consequences of water repellent-based inhibitors for controlling mild steel corrosion in concrete composite

Roka,

Gautam,

Giri

et al. 2023

E3S Web Conf.

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Synthetic water repellent (WRep) generally blocks the ingress of corrosive factors like moisture and various gases to the reinforced steel (RS) surface through the concrete pores. Mixing such WReps in the concrete mix did not affect the anti-corrosive response to the RS infrastructures. Considering such consequences, the present work explored the uses of two synthetic water repellents (e.g., WRep-A & WRep-B) and plant-derived green inhibitors to control the corrosion stability level of the RS in the concrete matrix. The broader question of the work is to know whether the water-repellent affects the anti-degradation response to the steel in concrete at the same patterns as commonly practiced in the concrete matrix or differently when the cast reinforced concretes exposed to water-repellent suspension for a certain curing time. The concrete slab exposed for one week to the suspension mixture of 1000 ppm WRep-B+Mangifera indica (WRep-B+MILE) and 1000 ppm WRep-B+Psidium guajava (WRep-B+PGLE) extracts exhibited maximum anti-corrosive response, which is justified by corrosion potential shifting to a more positive potential zone where the reinforced steel corrosion damage state rated as <10% probability and anticipated more effective corrosion inhibiting activities compared to other concentrations used in this work.

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Section: Introductionmentioning

confidence: 99%

The anti-degradation consequences of water repellent-based inhibitors for controlling mild steel corrosion in concrete composite

Roka,

Gautam,

Giri

et al. 2023

E3S Web Conf.

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show abstract

“…Cement paste (CP) quality is the result of a porous system (porosity, capillarity). It has impacts on all mechanical, physical, and chemical properties, while the most important parameter is the water-to-cement (binder) ratio w/c (w/b) [ 31 , 32 ]. The temperature of input materials is an often neglected aspect, even though increasing temperature negatively influences the workability of plastic concrete.…”

Section: Introductionmentioning

confidence: 99%

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

2021

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This experimental study focuses on the assessment of mineral additives and their incorporation into cement composites (CC). The assessment was based on a holistic approach to the performance of the durability properties of CC. Environmental suitability was also taken into consideration. In the experiments, cement pastes with w/c ratios of 0.3, 0.4, and 0.5, respectively, were prepared. Natural zeolite (NZ) and densified silica fume (SF) at doses of 7.5 and 15.0 wt.% of cement were used as the investigated (replacement) materials. Their effects (including development over time) on density, strength (flexural and compressive), porosity by water absorption, permeability by rapid chloride penetration (RCP) test, phase content by thermal analysis, and hydration progression, were observed. The results were then used to propose an evaluation approach. Natural zeolite was used for its known pozzolanic activity and classification as a supplementary cementitious material (SCM). In contrast SF acted as a filler in cement pastes, and thus did not have a direct positive effect on durability. The concept of comprehensive analysis for unknown additive classification is proposed to expressly differentiate between SCM, inert, and improving mineral additive. This concept could be applied to the assessment of mineral additives with regards to the durability and suitability of cement composites.

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Concrete porosity and transport processes

Al-Jabari

2022

Integral Waterproofing of Concrete Structures

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Characterization of paste microstructure for durability properties of concrete

Cited by 11 publications

References 38 publications

The anti-degradation consequences of water repellent-based inhibitors for controlling mild steel corrosion in concrete composite

The anti-degradation consequences of water repellent-based inhibitors for controlling mild steel corrosion in concrete composite

Concept of Evaluation of Mineral Additives’ Effect on Cement Pastes’ Durability and Environmental Suitability

Concrete porosity and transport processes

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