How do you classify the density of concrete?
Those used to make normal-density concrete are called normal-density aggregates. Those for low-density concrete (historically known as “lightweight” concrete) that have an air-dried density at 28 days usually in the range of 1440 to 1850 kg/m3 (90 to 115 lb/ft3), are called low-density aggregates.
Where is high density concrete used?
High density concrete can be used for structural and/or specialised construction purposes. The main use of HDC is in the nuclear industry as radiation shielding. Special care should be taken to the specific type of aggregates used and type of cements combined in the concrete mix.
Which type of aggregate is best suited for denser concrete?
Gravel or broken stone aggregates with rough and non-glassy texture are the best aggregates because they create a good bond with the cement paste.
What is aggregate density?
The relative density of aggregate: the relative density (specific gravity) of an aggregate is the ratio between its Mass and the Mass of an equal volume of water. Most aggregates have a relative density between 2.4-2.9 with a corresponding particle density (Mass) of 2400-2900 kg/m3 (150-181 lb /ft3).
What is high-density of concrete?
High-density concrete or heavyweight concrete is produced using special heavy aggregates (with specific gravities higher than 3000 kg/m3). EN 206:2013+A1:2016 (2016) defines heavyweight concrete as having an oven dry density greater than 2600 kg/m3. The density achieved will depend on the type of aggregate used.
How heavy is 1m3 of concrete?
One cubic metre of concrete weighs 2.5 Tonnes. Typically, 1m3 of concrete is made up of 350Kg of cement, 700Kg of sand, 1,200Kg of chippings and 150 Litres of water.
What is high density concrete and where is it mainly used?
High density concrete is mainly used for the purpose of radiation shielding, for counterweights and other uses where high density is required. The high density concrete has a better shielding property, so that it can protect harmful radiations like X-rays, gamma rays, and neutrons.
Does concrete have high density?
What is the durability of concrete?
Durability of concrete may be defined as the ability of concrete to resist weathering action, chemical attack, and abrasion while maintaining its desired engineering properties. For example, concrete exposed to tidal seawater will have different requirements than an indoor concrete floor.
What is the maximum strain of concrete?
0.0035
(ii) The maximum strain in concrete at the outermost compression fibre in bending is 0.0035.
How do you calculate the density of concrete?
Determine the Density of Concrete. Density is the measure of mass for a given volume and is defined by the formula: density (p) = mass (m) ÷ volume (V) The density of concrete is 3.15 g/cm 3 while the density of aggregate will vary by the type of stone used.
What is the standard density of concrete?
“The density of normal concrete is 2400 kg/m 3 and the density of lightweight concrete is 1750 kg/m 3.
How do you calculate cement?
How to calculate concrete: Determine how thick you want the concrete. Measure the length and width that you’d like to cover. Multiply the length by the width to determine square footage. Convert the thickness from inches to feet. Multiply the thickness in feet by the square footage to determine cubic feet.
How much does cured concrete weigh?
This standard concrete mix (used for most premix applications) weighs about 133 pounds per cubic foot of concrete, so a cubic yard (which contains 27 cubic feet) will weigh in at about 3,600 pounds. With the given mix ratio, cured concrete is about 22 percent cement by weight.