Effect of Selected Admixtures on the Properties of Ordinary Concrete

Kotwa, Anna

doi:10.1016/j.proeng.2015.06.112

Cited by 4 publications

(2 citation statements)

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“…The percentage reduction in the initial rate of water absorption of concrete exhibited a substantial increase with curing age, in contrast to the secondary rate of water absorption that is dependent on the initial rate of absorption. These findings align with the research conducted by (Kotwa, 2015;Liu et al, 2022).…”

Section: Rapid Chloride Penetrationsupporting

confidence: 90%

Effects of Fly Ash on Compressive Strength and Durability Properties of Lean Concrete

Ohwofasa,

Ikumapayi,

Arum

2023

jasem

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Concrete production and waste generation are among human activities that negatively impact the environment. This study investigated the effects of fly ash on compressive strength and durability properties of lean concrete using appropriate standard methods. The results showed that the compressive strength of the control mix is higher than those of fly ash concrete mixes. The compressive strength of the fly ash blended mixes decreased as the replacement level increased. However, the strength increased with hydration time, and the optimal replacement level being 5%. While the chloride ion penetration and water absorption rate decreased, the sulfate resistance increased with hydration time and replacement level. The fly ash mixes exhibited better durability properties than the control mix in all durability tests conducted. The SEM-EDX analysis showed that mixes with well-packed microstructures exhibited favorable compressive and durability properties. In conclusion, Class C fly ash is recommended for lean concrete mixes at a replacement level of up to 15% when compressive strength is the primary concern, while mixes with a replacement level of 25% or more are recommended in areas susceptible to sulfate attack.

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Section: Rapid Chloride Penetrationsupporting

confidence: 90%

Effects of Fly Ash on Compressive Strength and Durability Properties of Lean Concrete

Ohwofasa,

Ikumapayi,

Arum

2023

jasem

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“…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]. But the addition of mineral admixtures also increases the chances of drying shrinkage because admixed concrete has little or no Ca(OH) 2 as most of it takes part in the formation of extra CSH gel.…”

Section: Resultsmentioning

confidence: 59%

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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Influence of Different Types of Aggregates on the Structural Properties of Fiber-Reinforced Concrete

Martinov

Lukin

Rimshin

et al. 2022

International Scientific Siberian Transport Forum TransSiberia - 2021

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Effect of Selected Admixtures on the Properties of Ordinary Concrete

Cited by 4 publications

References 0 publications

Effects of Fly Ash on Compressive Strength and Durability Properties of Lean Concrete

Effects of Fly Ash on Compressive Strength and Durability Properties of Lean Concrete

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

Influence of Different Types of Aggregates on the Structural Properties of Fiber-Reinforced Concrete

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