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2. Superplasticizer - Wikipedia

   en.wikipedia.org/wiki/Superplasticizer

   Their addition allows to decrease the water-to-cement ratio of concrete or mortar without negatively affecting the workability of the mixture. It enables the production of self-consolidating concrete and high-performance concrete. The water–cement ratio is the main factor determining the concrete strength and its durability. Superplasticizers ...

3. HD Supply - Wikipedia

   en.wikipedia.org/wiki/HD_Supply

   HD Supply Holdings, Inc. (formerly Maintenance Warehouse) is an industrial distributor in North America.The company provides a broad range of products and value-added services to approximately 250,000 professional customers in maintenance, repair and operations, infrastructure and power and specialty construction sectors. [4]

4. Polymer concrete - Wikipedia

   en.wikipedia.org/wiki/Polymer_concrete

   Unlike traditional concrete structures, polymer concrete requires no coating or welding of PVC-protected seams. [4] It can also be used as a bonded wearing course for asphalt pavement, for higher durability and higher strength upon a concrete substrate, and in skate parks, as it is a very smooth surface. [citation needed]

5. Types of concrete - Wikipedia

   en.wikipedia.org/wiki/Types_of_concrete

   High-strength concrete has a compressive strength greater than 40 MPa (6000 psi). In the UK, BS EN 206-1 [3] defines High strength concrete as concrete with a compressive strength class higher than C50/60. High-strength concrete is made by lowering the water-cement (W/C) ratio to 0.35 or lower.

6. Concrete - Wikipedia

   en.wikipedia.org/wiki/Concrete

   The early strength of the concrete can be increased if it is kept damp during the curing process. Minimizing stress prior to curing minimizes cracking. High-early-strength concrete is designed to hydrate faster, often by increased use of cement that increases shrinkage and cracking. The strength of concrete changes (increases) for up to three ...

7. Properties of concrete - Wikipedia

   en.wikipedia.org/wiki/Properties_of_concrete

   Twenty eight days is a long wait to determine if desired strengths are going to be obtained, so three-day and seven-day strengths can be useful to predict the ultimate 28-day compressive strength of the concrete. A 25% strength gain between 7 and 28 days is often observed with 100% OPC (ordinary Portland cement) mixtures, and between 25% and 40 ...