That is, heat is liberated during both the setting & hardening process of the concrete. The concrete expands as the temperature rises, & restraint against contraction on subsequent cooling, unless properly controlled, leads to cracking. The cracks that form usually pose a durability problem, ...
Concrete is an excellent conductor of heat, but it also produces heat which raises the concrete temperature while curing. Why does curing concrete do this? The simple answer is that water, aggregates (stone, sand, and gravel), and portland cement start a chain of chemical reactions called hyd...
They are energy efficient because they retain heat so well.Fiberglass hot tubs are smooth, low maintenance, and come in various colors. However, people with asthma may have problems when it needs to be recoated (every five years), and fibers are released into the air. ...
As affected fund managers rely on subjective evaluations, a firm’s commitment to specific environmental targets or concrete emissions-reduction actions can moderate the managers’ risk assessment. Indeed, we find that affected fund managers are less likely to divest when portfolio firms disclose ...
From selecting sustainable materials (bamboo, concrete or reclaimed tile) to installing eco-friendly features (a timer on your vent fan or a water-conserving shower head), small changes can make a big difference over time. DIY shower remodel vs hiring a professional The construction pros can be...
and the forms make it easier to attach interior and exterior sheathing materials. Concrete reduces exterior noise by as much as two-thirds. It's also less attractive to insects and rodents. Concrete creates a substantial thermal mass, so that the house will retain both heat and cool temperature...
Unlike concrete and steel, however, bone and silk don’t generate industrial emissions in their manufacture. British firm Exploration Architecture has dedicated its practice to translating nature’s lessons into built form. For its Biomimetic Office Building project, the firm studied how plant and ...
Explain how steel reinforcing bars work in concrete How tall is the tallest mountain? How can liquid form in colder temperatures? Why is there much less subduction around the Atlantic than the Pacific ? A baseball is thrown straight upward. Describe the direction and magnitude of the velocity, ...
Four decades ago, less than 5 percent of American were cremated when they died. Now that figure stands at nearly half. This is how cremation actually works, and what happens to a culture when its attitude about how to memorialize the dead undergoes a rev
However, concrete evidence that it does so is still lacking. There is an extensive literature on invertebrate strategies for handling extreme cold, e.g., see [37], but little attention has been paid to possible thermogenic mechanisms, perhaps driven by the description of such animals as ‘...