Engineered cementitious composites (ECCs) suffer from high shrinkage and low early strength due to large dosage of materials slow hydration fly ash. This study aims improve compressive properties reduce drying ECC using ceramic wastes hydrothermal curing. Experimental results have indicated that polishing powder (CPP) recycled sand (RCS) exert opposite effect on the ECC. Hydrothermal-cured enha...

Acoustic emission activity produced by unrestrained drying shrinkage of an early age normal strength concrete specimen was measured with an array of fourteen broad-band high-fidelity acoustic emission sensors. The specimen was continuously monitored for 17 days, and full waveforms of the acoustic emissions were recorded throughout this time period. We present the source locations in three dimen...

High early age concrete temperatures can lead to many problems such as an increased rate of cement hydration, well moisture loss from fresh which ultimately the occurrence plastic shrinkage cracking. Concrete is also batched and cast at various ambient greatly influences temperature development after placement. There a need understand influence on cracking concrete. This study investigated over...

The influence of water-to-cement mass ratio (w/c) on early-age properties of cementbased materials is investigated using a variety of experimental techniques. Properties that are critical to the early-age performance of these materials are tested, including heat release, semiadiabatic temperature, setting time, autogenous deformation, and strength development. Measurements of these properties u...

The brain shrinks with age, but the timing of this process and the extent of its malleability are unclear. We measured changes in regional brain volumes in younger (age 20-31) and older (age 65-80) adults twice over a 6 month period, and examined the association between changes in volume, history of hypertension, and cognitive training. Between two MRI scans, 49 participants underwent intensive...

Lesions in the hippocampus (HC), the entorhinal cortex (EC), and the prefrontal cortex (PFC) are associated with impairment of episodic memory; reduced HC volume is linked to memory declines in dementia; and decline in EC volume predicts progression from mild cognitive impairment to dementia. However, in healthy adults, the relationship between memory and regional volumes is unclear, and no dat...

Early-age cracking during the plastic stage is unsightly and a cause of future durability problems. This paper investigates effects various simple curing methods used in practice to enhance early-age concrete performance, including covering with sheet wet hessian fabric, surface power floating use cold water mix. The benefits offered by three standard admixtures (Safecure Super concrete, Safecu...

Prostatic stromal sarcoma (PSS) is a rare tumor that normally occurs in adult age. Its management relies mainly on surgery. We report the first case of PSS occurring in an adolescent. There was evidence of a good response to chemotherapy including ifosfamide, doxorubicin, vincristine and actinomycin-D, although the final outcome was dismal. A review of the English literature revealed 14 additio...

This paper focuses on the effects of High Volume Fly Ash (HVFA) concrete with high content Bottom (BA) as a fine aggregate. A strength target 45 MPa 12 � 2 cm slump was determined control. The tests that carried out were compressive at age 3 to 90 days ages and splitting 28 ages, test, measurement heat hydration, autogeneous shrinkage. Variations in mix tested HVFA without BA FA 50% - 80%, sand...

This paper presents the results of an experimental investigation carried out to evaluate the shrinkage of High Strength Concrete. High Strength Concrete is made by partially replacement of cement by flyash and silica fume. The shrinkage of High Strength Concrete has been studied using the different types of coarse and fine aggregates i.e. Sandstone and Granite of 12.5 mm size and Yamuna and Bad...