Effect of curing conditions on the permeability of concrete with high volume mineral admixtures

Liu, Baoju; Luo, Guo Qing; Xie, Youjun

doi:10.1016/j.conbuildmat.2018.01.190

Cited by 88 publications

(25 citation statements)

References 33 publications

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“…Electric flux is an indicator for evaluating the corrosion resistance of concrete against chloride ions and can reflect the compactness and durability of concrete to some extent [29,30]. In order to compare the differences in resistance to chloride ion penetration and compactness between the carbonation cured concrete and moisture-cured concrete, electrical flux tests were performed on concrete samples at 28 days.…”

Section: Methodsmentioning

confidence: 99%

The Performance of Carbonation-Cured Concrete

Zhen

Chen

2019

Materials

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The research shows that carbonation-cured concrete has several mechanical and durability properties that are better than those of moisture-cured concrete. However, many properties of carbonation-cured concrete have not yet been studied. In this research, carbonation-cured concrete was prepared by pre-curing, carbonation curing, and then moisture curing. The compressive strength, CO2 uptake, pH value, chloride ion permeability and abrasion resistance of the carbonation-cured concrete were investigated. Results showed that the compressive strength of carbonation-cured concrete was more than 10% higher than that of moisture-cured concrete at the same age; a steel bar is stable in carbonation-cured concrete; and carbonation-cured concrete exhibited better abrasion resistance and chloride ion permeability than that of moisture-cured concrete. The optimization of pore structure and improvement in the micro-hardness are the reasons for the improved chloride ion permeability and abrasion resistance of carbonation-cured concrete.

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Section: Methodsmentioning

confidence: 99%

The Performance of Carbonation-Cured Concrete

Zhen

Chen

2019

Materials

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“…That is why the rate of water absorption was lower for concrete with microsilica and rice straw as compared to control concrete. The percentage reduction in the initial rate of water absorption of concrete with an increase in the curing age was much higher as compared to the secondary rate of water absorption [41]. A similar study observed that the addition of mineral admixtures reduces the rate of water absorption of concrete as compared to the control concrete because of the densification of the cement paste [42].…”

Section: Resultsmentioning

confidence: 57%

Evaluation of water absorption and chloride ion penetration of rice straw ash and microsilica admixed pavement quality concrete

Pandey

Kumar

2019

Heliyon

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The effects of rice straw ash (RSA) and microsilica (MS) on durability properties (water absorption and chloride ion penetration) of M40 grade Pavement Quality Concrete (PQC) were studied. Ten concrete samples were prepared by partially substituting cement with RSA and MS in various proportions. A significant reduction was observed in the water absorption and chloride ion penetration in concrete samples with an increase in the curing age as well as with an increase in the proportion of MS and RSA. The maximum reduction in water absorption and chloride ion penetration was observed in R2M3 (10% RSA and 7.5% MS) as compared to control concrete (R0). The analytical relationships were developed between the above-mentioned parameters and curing age of concrete. A linear equation was established between the initial and secondary rate of water absorption of concrete and also between the chloride ion penetration of concrete at 10–20 mm and 25–35 mm depth. Both these equations were applicable to all the concrete samples of this study. Predictive charts were generated between the above-mentioned parameters and days of curing in water.

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“…CWA correlates well with the internal pores of concrete, as well as its water sorptivity. Both of these parameters are often used to determine and compare the permeability of concrete [ 31 , 32 , 33 ]. Liu et al [ 31 ] have indicated that CWA also correlates well with the durability indicators of concrete.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Temperature Curing on the Strength Development, Transport Properties, and Freeze-Thaw Resistance of Blast Furnace Slag Cement Mortars Modified with Nanosilica

et al. 2020

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This investigation studies the effects of hot water and hot air curing on the strength development, transport properties, and freeze-thaw resistance of mortars incorporating low-heat blast furnace slag cement and nanosilica (NS). Mortar samples were prepared and stored in ambient conditions for 24 h. After demolding, mortar samples were subjected to two different hot curing methods: Hot water and hot air curing (40 °C and 60 °C) for 24 h. For comparison purposes, mortar reference mixes were prepared and cured in water and air at ambient conditions. Strength development (from 1 to 180 days), capillary water porosity, water sorptivity, and freeze-thaw resistance were tested after 180 days of curing. The experimental results showed that both curing regimes accelerate the strength development of mortars, especially in the first seven days of hydration. The highest early strengths were reported for mortars subjected to a temperature of 60 °C, followed by those cured at 40 °C. The hot water curing regime was found to be more suitable, as a result of more stable strength development. Similar findings were observed in regard to durability-related properties. It is worth noting that thermal curing can more efficiently increase strength in the presence of nanosilica, suggesting that NS is more effective in enhancing strength under thermal curing.

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Effect of curing conditions on the permeability of concrete with high volume mineral admixtures

Cited by 88 publications

References 33 publications

The Performance of Carbonation-Cured Concrete

The Performance of Carbonation-Cured Concrete

Evaluation of water absorption and chloride ion penetration of rice straw ash and microsilica admixed pavement quality concrete

The Effects of Temperature Curing on the Strength Development, Transport Properties, and Freeze-Thaw Resistance of Blast Furnace Slag Cement Mortars Modified with Nanosilica

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