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The proportion can be 1:2:4 (M15 concrete) or 1:1.5:3 for M20 concrete. The proportion of 1:2:4 concrete denotes the ratio of cement: sand: coarse aggregates by volume unless specified. Minimum compressive strength of concrete of 1:2:4 mix proportion should be 140 kg/sq.cm or 2000 lbs/sq.in on 7 days.

Portland cement of each of the eight types must have the following chemical compositions: aluminum oxide, ferric oxide, magnesium oxide, sulfur trioxide, tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium aluminofernite.

Three different grades of Ordinary Portland cement are available in the Indian market, which are grade 33 (IS:269), grade 43 (IS:8112), and grade 53 (IS:12269). Grade 33 uses M20 grade concrete and is used for plastering. Grade 43 is applied for precast, plastering, and flooring. It uses M30 concrete.

To obtain SDS, get them from the manufacturer. They may be sent with the chemical order (paper copy or e-mail attachment). Otherwise, go to the manufacturer's website and download it or request a copy.

The proportion of the cement concrete should be 1:2:4 or as prescribed. For the proportion of 1:2:4 the quantity of materials goes as one part of cement, two parts of sand and four parts of aggregates.

Standards: Type III cement meets the following requirements: ASTM C150 for Type III cement. AASHTO M85 for Type III cement. 1 Day Compressive Strength 3 Day Compressive Strength Product Precautions: Type III cement is not for use in areas subject to sulfates in soils.

To access a SDS, search for it either with a general search engine, such as Google, or visit the specific manufacturer's or SDS service websites listed on the Environmental Health & Safety's website: https://ovpr.uchc.edu/services/rics/ehs/chemical-safety/.

Safety Data Sheets for Cement & Concrete | SDS - CEMEX USA Sections 1 through 8 contain general information about the chemical, identification, hazards, composition, safe handling practices, and emergency control measures (e.g., fire fighting).