the earliest use we know about for regular concrete was in the twentieth century.
the earliest use we know about for regular concrete was in the twentieth century.
when was the earliest use we know about for regular concrete?
twentieth century
bullet::::- c. 3100 bc – egypt, earliest known decimal system allows indefinite counting by way of introducing new symbols.









































bullet::::- c. 2800 bc – indus valley civilization on the indian subcontinent, earliest use of decimal ratios in a uniform system of ancient weights and measures, the smallest unit of measurement used is 1.704 millimetres and the smallest unit of mass used is 28 grams.









































bullet::::- 2700 bc – egypt, precision surveying.









































bullet::::- 2400 bc – egypt, precise astronomical calendar, used even in the middle ages for its mathematical regularity.
timeline of mathematics
regular concrete is the lay term for concrete that is produced by following the mixing instructions that are commonly published on packets of cement, typically using sand or other common material as the aggregate, and often mixed in improvised containers. the ingredients in any particular mix depends on the nature of the application. regular concrete can typically withstand a pressure from about 10 mpa (1450 psi) to 40 mpa (5800 psi), with lighter duty uses such as blinding concrete having a much lower mpa rating than structural concrete. many types of pre-mixed concrete are available which include powdered cement mixed with an aggregate, needing only water.
types of concrete