What is a concrete detail sentence?
Concrete detail (CD) This sentence is the “what” is happening. It should be either facts, examples, illustrations, evidence, support, plot references, paraphrases, citations, quotations, plot summary, etc. It should be a concrete detail and should start with ‘for example’ or a different transition.
What are the three major types of concrete details?
Find here Details of some of these various types of concrete.Normal Strength Concrete. The concrete that is obtained by mixing the basic ingredients cement, water and aggregate will give us normal strength concrete. Plain Concrete. The plain concrete will have no reinforcement in it. Reinforced Concrete.
What are the main components of cement?
Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore.
What is the size of cement?
What is the average particle size of cement? Explanation: Approximately 95% of cement particles are smaller than 45 microns and the average particle size is 15 microns.
What was used before cement?
Early cementicious composite materials typically included mortar-crushed, burned limestone, sand and water, which was used for building with stone, as opposed to casting the material in a mold, which is essentially how modern concrete is used, with the mold being the concrete forms.
Why it is called Portland cement?
The inventor Joseph Aspdin, of England, patented the basic process in 1824, naming it for the resemblance of the cement when set to portland stone, a limestone from the Isle of Portland. …
Does it take 100 years for concrete to cure?
Does concrete take 100 years to cure? No. Not on at least two basis points. Firstly, concrete only continues hardening for so long as the pore moisture value drops below a certain ill-defined value.
What is the life span of concrete?
Early 20th-century engineers thought reinforced concrete structures would last a very long time – perhaps 1,000 years. In reality, their life span is more like 50-100 years, and sometimes less.
What is the 7 day strength of concrete?
Concrete, by Mindness and Young, gives a general rule: The ratio of 28-day to seven-day strength lies between 1.3 and 1.7 and generally is less than 1.5, or the seven-day strength is normally between 60% to 75% of the 28-day strength and usually above 65%.