Effect of Self Curing Agents on Mechanical Properties of Concrete

Joseph, Daliya; Xavier, Belarmin

doi:10.17577/ijertv5is090068

Cited by 3 publications

(4 citation statements)

References 3 publications

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“…When one percent of PEG400 is added, mix is found to be the best for M20 grade of concrete without affecting the workability [6]. While analysing the individual effect of curing agents Poly Vinyl Alcohol and Polyethylene Glycol, it was noticed that, the increased content of self-curing agent resulted in strength reduction and 1% of the above said curing agents is ideal for strength not negotiating the workability [7]. 0.8% of Propylene glycol, Polyethylene glycol and Perlite are observed to be the optimal percentages for workability and strength whereas for Sodium polyacrylate and Vermiculite, 0.2% and 0.4% are the optimal dosages respectively.…”

Section: Introductionmentioning

confidence: 99%

Properties of Concrete Incorporated With Self-Healing and Internal Curing Agents

Rathinam,

Murali,

et al. 2023

Jurnal Teknologi

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In this study, effects of collective addition of self-healing and internal curing agents on the strength and permeation properties of concrete were determined. The internal curing agent Polyethylene Glycol (PEG 400) was added at 2% of cement based on weight and a mixture of Bentonite, Quick lime and Magnesium oxide were replaced for cement at 5% each as self-healing agent. Six mixes were investigated which includes a control mix (water curing), a mix with PEG 400 (with and without water curing), a mix with self-healing agents (water curing) and a mix integrated PEG 400 and self-healing agents. (With and without water curing) The density of concrete and strength parameters like compressive, flexural and tensile strengths were found by conducting experiments using the procedures given in testing standards. Permeation features were also studied by subjecting the concrete to water absorption and sorptivity tests. Density values lowered because of internal curing agents. The integration of internal curing and self-healing agents have adverse effects on density, strengths, water absorption and sorptivity co-efficients but there is an improvement in the mentioned properties when the specimens were cured in water.

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Section: Introductionmentioning

confidence: 99%

Properties of Concrete Incorporated With Self-Healing and Internal Curing Agents

Rathinam,

Murali,

et al. 2023

Jurnal Teknologi

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“…A total of 18 studies on the strength of steel reinforcement were found, with the earliest date being 2010 [4][5][6][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Although they have been concentrated mainly in Lagos and the surrounding South-Western Nigerian states (around 50%), there have been studies in a fair number of places too.…”

Section: Introductionmentioning

confidence: 99%

“…However, a major shortcoming of these studies is the absence of the characteristic strength values of the tested steel samples. In one case, this was due to omission [6], but in all other cases, a conflation was made of the characteristic strength with the mean strength [4,5,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. This has given an incorrect picture of the state of affairs.…”

Section: Introductionmentioning

confidence: 99%

Review of Characteristic Strength Reports for Steel Reinforcement in Nigeria (2010-2021)

Rufa’i

2023

AEF

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There has been increasing concern in recent years over the structural integrity of construction in Nigeria. Reinforced concrete is the primary structural material in the country, so the strength of the steel reinforcement has become a major target for scrutiny. This study reviews the reported literature on reinforcing steel strengths from tests carried out in Nigeria between 2010-2021. The characteristic strength of steel is the basis for the design of steel reinforcement in both the Eurocode and British Standards used for design in Nigeria. However, it is noted that in every case, the characteristic strength results are missing or erroneously reported. A total of 18 studies are found, and the raw data for each study is analysed to derive the characteristic strength results. An average characteristic strength of 342.4 MPa is found from all the studies, lower than the 400 MPa and 500 MPa minimums assumed in the Eurocode and British Standards respectively. The finding here indicates that the widespread methodology around interpreting the tensile testing of steel reinforcement in Nigeria needs revisiting.

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“…Debido a la diferencia en el potencial químico entre las fases de vapor y líquida, continua evaporación de humedad toma lugar desde la superficie externa del concreto. Los polímeros añadidos a la mezcla de concreto principalmente forman enlaces de hidrógeno con las moléculas de agua y reducen el potencial químico de sus moléculas, lo que se manifiesta en la reducción de la presión de vapor, por lo tanto, reduciendo la tasa de evaporación de la superficie (Daliya & Belarmin, 2016).…”

Section: Mecanismo Del Auto-curado a Través Del Uso Del Pegunclassified

Efecto del método de Auto-curado con polímero Glicol de Polietileno en la resistencia a la compresión de los concretos fluidos F’c=280 kg/cm2, en Lima Metropolitana

Pacheco Almandos

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En el desarrollo de las diversas actividades vinculadas a obras de construcción está presente el concreto, que, por sus propiedades y características favorables, ha llegado a considerarse como uno de los materiales más usado en el rubro constructivo actualmente. En relación a la relevancia de este material, es necesario garantizar que la resistencia final que alcance sea la requerida según las normativas vigentes, lo cual muchas veces no se asegura, debido a las deficiencias en la práctica del curado del concreto. El concreto auto-curado es uno de los concretos innovadores que sirve para mitigar el curado insuficiente del concreto debido a la negligencia humana, la escasez de agua en las zonas áridas, la inaccesibilidad de las estructuras, los costos adicionales que generan los materiales y el personal requerido para desarrollar esta labor, los terrenos difíciles y en zonas donde la presencia de sales en el agua puede afectar el comportamiento del concreto. En esta tesis se va a utilizar Glicol de Polietileno PEG-400 como material potencial que propicie el auto curado del concreto, para ello, obtendrá la dosificación óptima del PEG-400 en la mezcla según las resistencias de diseño del concreto en análisis a fin de proporcionar la humedad adicional en el concreto para lograr una hidratación más eficaz del cemento y reducir su auto-desecación, traduciéndose esto en una mayor retención de agua al concreto y contrarrestando la formación de fisuras. Este novedoso material hace que se supriman los procesos tradicionales del curado del concreto.

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Effect of Self Curing Agents on Mechanical Properties of Concrete

Cited by 3 publications

References 3 publications

Properties of Concrete Incorporated With Self-Healing and Internal Curing Agents

Properties of Concrete Incorporated With Self-Healing and Internal Curing Agents

Review of Characteristic Strength Reports for Steel Reinforcement in Nigeria (2010-2021)

Efecto del método de Auto-curado con polímero Glicol de Polietileno en la resistencia a la compresión de los concretos fluidos F’c=280 kg/cm2, en Lima Metropolitana

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