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Accelerated Curing of Concrete

Accelerated Curing of Concrete

Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...

Curing of Concrete

Curing of Concrete

The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...

Curing Methods

Curing Methods

Concrete members with a small surface-to-volume ratio are cured by oiling and moistening the forms before casting the concrete member. These forms can be left in place for a prolonged period to prevent moisture loss, and can be wetted if made of a material suitable for wetting. If the forms are removed early, the concrete member is moistened and covered with polythene sheets to maintain moisture. For large horizontal concrete surfaces exposed to dry weather, a temporary covering is suspended...

Factors Affecting Creep

Factors Affecting Creep

In normal-weight aggregate concrete, the hardened cement paste is the primary contributor to creep, whereas the aggregates, being stiffer than the cement paste, are more resilient to stress-induced deformation. The stiffness of the aggregates is defined by their modulus of elasticity, and the more voluminous they are in the concrete, the less it will creep.
Further, the water/cement ratio is critical, as a lower ratio increases concrete strength, thus reducing creep. The strength of the...

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Related Experiment Video

Updated: Jul 19, 2026

Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation

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Published on: July 21, 2014

Effects on microstrain and conversion of flowable resin composite using different curing modes and units.

Wan-Yu Tseng¹, Ruey-Song Chen, Jaw-Lin Wang

¹Graduate Institute of Clinical Dental Science, School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan.

Journal of Biomedical Materials Research. Part B, Applied Biomaterials

|October 6, 2006

Summary

Different light curing units impact dental resin composite properties. The Optilux boost mode generated the highest microstrain, while LEDemetron offered superior monomer conversion compared to halogen units.

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Area of Science:

Dental Materials Science
Polymer Chemistry
Biomaterials Engineering

Background:

Light curing is essential for dental resin composites.
Understanding curing unit effects on material properties is crucial for clinical success.
Tetric Flow is a widely used flowable resin composite.

Purpose of the Study:

To evaluate the microstrain and degree of conversion of Tetric Flow under different light curing conditions.
To compare the performance of three distinct light curing units: XL3000, Optilux 501, and LEDemetron.
To analyze the impact of varying curing times and modes on resin composite properties.

Main Methods:

Tetric Flow was subjected to hardening using three light curing units (XL3000, Optilux 501, LEDemetron) with varied time intervals (10-40s) and modes (conventional, boost, ramp).
Microstrain and degree of monomer conversion were measured for each condition.
Power density and spectral distribution of the curing units were analyzed.

Main Results:

Microstrain varied significantly, with Optilux boost mode producing the highest levels.
Degree of monomer conversion showed a distinct ranking across different units and times, with LEDemetron generally outperforming halogen units at similar energy outputs.
Optilux boost mode resulted in significantly higher conversion than most other modes, except for specific Optilux conventional and LEDemetron settings.

Conclusions:

Light curing unit type, mode, and duration significantly influence the microstrain and degree of conversion in flowable resin composites.
LED curing technology, as represented by LEDemetron, demonstrates potential for enhanced monomer conversion compared to traditional halogen units.
Careful selection of curing parameters is necessary to optimize material properties and minimize stress development during polymerization.