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 According to our concrete slab material estimator, the average minimum cost per square foot of a concrete slab is $1.36 and the maximum is $1.88. By comparison, the price per square foot for a cement slab is $5.50.Pavers are always more expensive than concrete due to the manufacturing process. As of publication, concrete costs around $3 to $5 per square foot, while pavers generally run between $5 and $15 per square foot. Your area’s cost of living will affect this price.BIS has released IS 269 code in December 2015 on specification of Ordinary Portland Cement [1]. This standard pertains to OPC and covers the requirements such as manufacturing, physical and chemical requirements, packing and making.The water–cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix. A lower ratio leads to higher strength and durability, but may make the mix difficult to work with and form. Workability can be resolved with the use of plasticizers or super-plasticizers.Posted on February 3, 2013 by Jeff Girard. Type III cement is a form of portland cement. This article explains Type III cement, but basically, Type III is a high-early-strength cement. It is ground finer and reacts faster than Type I cement, so the early strength gains are greater. Note the word “early”.Aggregate consists of large chunks of material in a concrete mix, generally a coarse gravel or crushed rocks such as limestone, or granite, along with finer materials such as sand. Cement, most commonly Portland cement, is associated with the general term “concrete.” Reinforcement is often included in concrete.Concrete has cement as an ingredient, they are not the same thing. Concrete is made of cement (a very fine powder made from limestone, sand, clay, and iron ore), water, sand and stone. Proportions of these ingredients are crushed and heated in a kiln to form “clinker”.