Question

differentiate between modern cement and ancient cement​

Answer 1

Explanation:

As it turns out, not only is Roman concrete more durable than what we can make today, but it actually gets stronger over time. ... Modern concrete is typically made with portland cement, a mixture of silica sand, limestone, clay, chalk and other ingredients melted together at blistering temperature

Answer 2

Answer:

hey mate here is your answer

Modern concrete is typically made with portland cement, a mixture of silica sand, limestone, clay, chalk and other ingredients melted together at blistering temperatures. In concrete, this paste binds 'aggregate' - chunks of rock and sand.