Abstract-Predicting 28-day compressive strength of concrete is an important research task for many years. In this study, concrete specimens were cured in two phases, initially at room temperature for a maximum of 30 h and later at a higher temperature for accelerated curing for a maximum of 3 h. Using the early strength obtained after the two-phase curing and the curing parameters, regression e...

as regards if curing stops for some time and then resumes again, then strength gain will also stop and reactive, in this study with choose suitable curing conditions after improper first curing (recurring) for normal and silica-fume concrete, effect of this curing conditions on strength and permeability was investigated. the results from tests such as compressive strength, capillary water absor...

The research objective was investigate the effect of alkali treatment on thermal stability, interfacial shear strength, mechanical properties and waterabsorption in composite honey pineapple fiber (HPF). HPF not given treated by soaking a mixture 6% wt sodium hydroxide. Mixing between Unsaturated Polyester (UPRs) Microcrystalline Cellulose (MCC) applied Taguchi test with 5% MCC, 250 RPm, 40 oC ...

This study investigated the influence of modulated photo-activation on axial polymerization shrinkage, shrinkage force, and hardening of light- and dual-curing resin-based composites. Three light-curing resin composites (SDR bulk-fill, Esthet X flow, and Esthet X HD) and one dual-curing material (Rebilda DC) were subjected to different irradiation protocols with identical energy density (27 J c...

In order to investigate the effects of microwave curing on the microstructure of the interfacial transition zone of mortar prepared with a composite binder containing glass powder and to explain the mechanism of microwave curing on the improvement of compressive strength, in this study, the compressive strength of mortar under microwave curing was compared against mortar cured using (a) normal ...

Microsilica concrete was prepared with a water-binder ratio of 0.35. Microsilica was used as a 10% replacement of cement by weight. Cylinder and cube specimens were cast for testing different hardened properties of the concrete. Three curing methods such as water curing, wrapped curing, and dry-air curing were applied at 20±2 C to cure the cylinder and cube specimens until the 0 day of testing....

A newly developed ultrasound method that acquires at the same time both reflected and transmitted P-waves, different angles, using two immersion transducers of 0.5 MHz central frequency, is described in this present study. This non-destructive allows calculating longitudinal transverse velocities, thus, Young modulus, so its evolutions followed domain. The closely correlation between evolution ...

Refractive index control of benzocyclobutene (BCB 4024-40) is achieved by facilitating different conditions during the thermal curing of BCB film. Refractive index (RI) change of 1.49% is obtained with curing of BCB film using an oven, while the RI change is 0.1% when the BCB is cured using a hotplate. The two different curing methods exhibit a temperature dependent refractive index change of t...

OBJECTIVE: To assess whether ice-water immersion or cold-water immersion is the more effective treatment for rapidly cooling hyperthermic runners. DESIGN AND SETTING: 17 heat-acclimated highly trained distance runners (age = 28 +/- 2 years, height = 180 +/- 2 cm, weight = 68.5 +/- 2.1 kg, body fat = 11.2 +/- 1.3%, training volume = 89 +/- 10 km/wk) completed a hilly trail run (approximately 19 ...