self-desiccation is the major source of autogenous shrinkage and crack formation in low water-binder ratio (w/b) concretes which can be reduced by internal curing. in this paper performance of high strength self consolidating concrete (hs-scc) with w/b of 0.28 and 0.33 including autogenous shrinkage, drying shrinkage, compressive strength, and resistance to freezing-thawing was investigated. th...

Background: Sperm storage via freezing has been useful for men who have difficulty masturbating during assisted reproductive technology (ART) programs and before impotency caused by chemotherapy, vasectomy, and other procedures. Studies were undertaken to evaluate the extent of cryoinjury to both semen and sperm after repeated freezing and thawing in oligozoospermic and normozoospermic samples ...

• Dedicated procedure to test F-T resistance of rammed earth samples was proposed. Samples submitted capillary rises or under early age hydric condition were tested. Compacted and stabilized unstabilized cycles induces significant scaling increase in volume water content. Earth stabilization reduced damage but did not prevent it. The use as a building material is worldwide encouraged thanks its...

Freezing thawing cycles are known to play an important role in fracture propagation on rock mass and thus slope instabilities. In laboratories, this phenomenon can be studied through the measurement of velocities elastic waves. Seven types rocks differing by their mineralogy texture were tested (gneiss, basalt, amphibolite, dolomite, sandstone, marble limestone calcite). Five samples each teste...

In order to improve the durability of fly ash concrete, a series of experimental studies are carried out, where durability improving admixture is used to reduce drying shrinkage and improve freezing-thawing resistance. The effects of durability improving admixture, air content, water-binder ratio, and fly ash replacement ratio on the performance of fly ash concrete are discussed in this paper. ...