amount of raw materials used to produce 1 tonne of concrete

CEMENT RAW MATERIALS International Cement Review

The quality of cement clinker is directly related to the chemistry of the raw materials used Around 80–90% of raw material for the kiln feed is limestone Clayey raw material accounts for between 10–15%, although the precise amounts will vary Magnesium carbonate, which may be present in limestone, is the main undesirable impurity The levelJan 15, 2020· Overall, about 16 tons of raw materials are used to make 1 ton of cement Portland cement is a key component of almost all modern concrete, accounting for more than 95% of the cement market Concrete is typically made up of 41% crushed rock, 26% sand, 16% water, 11% portland cement, and 6% entrained air But, despite being made from naturalIs Concrete Sustainable? Here’s Why We Need To TalkBoth of these concrete calculators make an allowance for the fact that material losses volume after being mixed to make concrete Calculator are provided for a general mix and a paving mix, the different ratio of materials are: General mix 1:5 cement:allin ballast or 1:2½:3½ cement:sharp sand:gravel Paving mix 1:3½ cement:allinMetric calculator for concrete cement, sand, gravel etc

Concrete Production an overview | ScienceDirect Topics

Even if concrete does contain only 15% cement by unit volume, it remains primarily responsible for concrete’s carbon footprint (CCF) Indeed, each tonne of cement produces about 1 tonne of CO 2 (Concrete Centre, 2011) It is worth knowing that the cement industry represents between 5% and 7% of the world’s CO 2 emissions (Meyer, 2009)