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A higher ratio gives a too fluid concrete mix resulting in a too porous hardened concrete of poor quality. Often, the concept also refers to the ratio of water to cementitious materials, w/cm. Cementitious materials include cement and supplementary cementitious materials such as ground granulated blast-furnace slag (GGBFS), fly ash (FA), silica ...
Hummingbird food is very easy to make, and actually a lot like simple syrup, the cocktail sweetener. All you really need is four parts water, one part sugar and a hummingbird feeder to put it in ...
A water to cement ratio (w/c) of approximately 0.38 (this means 38 lbs. of water for every 100 lbs. of cement) is required for all the cement particles to hydrate. Water beyond that is surplus and is used to make the plastic concrete more workable or easily flowing or less viscous.
Here are some more ways to turn your backyard into a hummingbird paradise. Of course, we can’t really think like hummingbirds. 9 Expert Tips for Attracting Hummingbirds
Their addition allows to decrease the water-to-cement ratio of concrete or mortar without negatively affecting the workability of the mixture. It enables the production of self-consolidating concrete and high-performance concrete. The water–cement ratio is the main factor determining the concrete strength and its durability. Superplasticizers ...
Foam concrete is produced by mixing cement or fly ash, sand, water, and a synthetic aerated foam, which provides stability to the air bubbles, in contrast to air-entrained concrete which is produced incorporating specialized admixtures directly into the concrete mix. Foam concrete offers excellent thermal and acoustic insulation properties ...
for some concrete components, for which a rapid strength development is required, even at low temperatures. In this case, a sufficiently high cement content and a sufficiently low water/cement ratio are mandatory to minimize any possible structural stability problems and to increase the concrete durability.
CLSM consists of a mixture of Portland cement, water, aggregate and sometimes fly ash.Unlike ordinary concrete, CLSM has much lower strength. The strength of CLSM is less than 1,200 pounds per square inch (8.3 MPa), while ordinary concrete has strengths exceeding 3,000 pounds per square inch (21 MPa) [citation needed].