Increase on Strengths of Hot Weather Concrete by Self-Curing of Wet Porous Aggregate

Sampebulu, Victor

doi:10.9744/ced.14.2.92-99

Cited by 5 publications

(3 citation statements)

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“…At 180 days, the rate of increase is 32% for limestone concrete, 25% for siliceous concrete, and 23% for silico-calcareous concrete. This significant improvement in strength was confirmed by researchers [34,35] who conducted a comparative study between water curing and curing with the use of curing agents. Their findings demonstrated that concrete treated with curing admixtures outperforms that cured solely in water.…”

Section: Figure 8 Effect Of Curing Compound On Concrete Compressive S...mentioning

confidence: 59%

Effect of Self-Curing Admixture and Sand Type on the Mechanical and Microstructural Properties of Concrete in Hot Climate Conditions

Benouadah,

Merbouh,

Nabil

et al. 2024

ACSM

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The performance of concrete in hot and arid regions, where summer temperatures typically range between 40 and 50℃, is critically affected by the rapid evaporation of mix water. This study systematically investigates the influence of elevated temperatures characteristic of these climates on both the fresh and hardened properties of concrete, with a focus on formulation variables. Three distinct sand types-calcareous, silicocalcareous, and siliceous-were utilized in conjunction with superplasticizers and curing agents to discern their effects under simulated hot weather conditions. These conditions replicated an ambient temperature of 50℃ for dry materials and water, a wind speed of 12 km/h, and a relative humidity of 10%, to emulate the average shaded environment in desert regions. Workability and compressive strength were evaluated, alongside a microstructural analysis conducted via Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). It was observed that mixtures containing siliceous or silicocalcareous sands exhibited enhanced fluidity, while those with calcareous sand demonstrated superior compressive strength. Microstructural examinations revealed a denser matrix in the calcareous sand-based concrete when compared to its counterparts. Notably, the incorporation of curing compounds and superplasticizers was found to augment the compressive strength, particularly in calcareous sand mixtures, under hot weather conditions. This research offers critical insights into optimizing concrete formulations to mitigate the adverse effects of hot weather concreting, providing a valuable resource for concrete technologists in similar climatic zones.

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Section: Figure 8 Effect Of Curing Compound On Concrete Compressive S...mentioning

confidence: 59%

Effect of Self-Curing Admixture and Sand Type on the Mechanical and Microstructural Properties of Concrete in Hot Climate Conditions

Benouadah,

Merbouh,

Nabil

et al. 2024

ACSM

View full text Add to dashboard Cite

show abstract

“…The additional mineral is reactive and contributes to the hydration process. The use of saturated fly ash is one way to reduce high exposure in the process of hydration to the density of cement in concrete [12,13]. The use of alternative sources for the manufacture of cement developed in Japan produced ecocement made from municipal waste ash through incineration as a substitute for some of the main raw materials containing 50% of cement raw materials such as mud waste [14].…”

Section: Imentioning

confidence: 99%

A Comparison of Organic Cement Made from Recycled Waste Material and Portland Cement

Syarif

Tjaronge

2021

Eng. Technol. Appl. Sci. Res.

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Organic cement is an environmentally friendly alternative to Portland cement which is acquired by recycled organic waste and Mediterranean soil. Waste management is a global problem. The physical characteristic test results of the organic cement show that the weight test of fresh organic concrete is 2081kg/m³ and the dry weight of concrete is 2032kg/m³ which are smaller than Portland cement concrete's which are 2525kg/m³ and 2405 kg/m³ respectively. The fineness of alternative cement grains that passed the 200 mesh sieve is 56%, which is more than Portland cement's which is 52%. The solid weight of alternative cement is 1200kg/m3 whereas the solid weight of Portland cement is 1250kg/m3.

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“…The curing agent moisture remains dormant until a humidity gradient forms during hydration, triggering a chemical reaction.[56]. Water is moving to dry zones of the matrix by capillary suction for continuous hydration[57]. PEG 400 is a revolutionary admixture that can transform concrete into a self-curing base.…”

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confidence: 99%

Improving Mechanical Properties of Recycled Aggregate Pervious Concrete Using Taguchi Method

Hemeda,

Bashandy,

Nasser

2024

Preprint

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The construction demolishing is non-degradable. Recycled aggregates were utilized to create sustainable products in pervious concrete manufacture. Adding fiber enhances pervious concrete mechanical properties. High absorption of RA and polyethylene-glycol are used to ensure internal curing. The purpose of this study was to statistically improve mechanical properties of pervious concrete using an experimental investigation. Taguchi method was employed to present DOE (Design of Experiment). Five factors in four levels designed by Taguchi provide sixteen mixes (L16 array). The factors were replacement of coarse aggregates by recycle aggregates, W/C ratio, synthetic macro-fiber, steel fiber and polyethylene-glycol.Designed mixes were prepared. Taguchi analysis concluded; macro-fiber addition has no impact on mechanical properties. 10% recycle aggregates replacement was the optimum ratio. Taguchi analysis allowed prediction of non-experimented results and evaluating mechanical properties values. Prediction of optimum mixes were experimented though confirmation mixes. Confirmation test results were the predicted values within ±10%.

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Increase on Strengths of Hot Weather Concrete by Self-Curing of Wet Porous Aggregate

Cited by 5 publications

References 0 publications

Effect of Self-Curing Admixture and Sand Type on the Mechanical and Microstructural Properties of Concrete in Hot Climate Conditions

Effect of Self-Curing Admixture and Sand Type on the Mechanical and Microstructural Properties of Concrete in Hot Climate Conditions

A Comparison of Organic Cement Made from Recycled Waste Material and Portland Cement

Improving Mechanical Properties of Recycled Aggregate Pervious Concrete Using Taguchi Method

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