Different between are Modern cement and ancient Cement.
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Modern concrete is typically made with portland cement, a mixture of silica sand, limestone, clay, chalk and other ingredients melted together at blistering temperatures. ... With these advanced techniques they could identify all the mineral grains produced in the ancient concrete over centuries.
Answer:
difference between modern and ancient cement
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आधुनिक और प्राचीन सीमेंट के बीच का अंतर
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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 temperatures.