Search results
Results from the WOW.Com Content Network
The Turner-Sclerometer test consists of measuring the amount of load required to make a scratch. [1] [2] In test a weighted diamond point is drawn, once forward and once backward, over the smooth surface of the material to be tested. The hardness number is the weight in grams required to produce a standard scratch.
Oldcastle Materials Inc. is a supplier of asphalt, concrete, and other building materials, and also offers construction and paving services. The Atlanta-based company is a subsidiary of CRH plc, a publicly traded international group of diversified building materials businesses, [2] [3] and has approximately 18,000 employees at 1,200 locations, as of March 2018.
Vulcan's innovative Crescent Market project led to construction of a large quarry and deep water seaport on the Yucatán Peninsula of Mexico, just south of Cancun. This quarry supplies Tampa, New Orleans, Houston, and Brownsville, Texas, as well as other Gulf coast seaports, with crushed limestone via large 62,000-ton self-discharging ships.
A scleroscope is a device used to measure rebound hardness.It consists of a steel ball dropped from a fixed height. The device was invented in 1907. As an improvement on this rough method, the Leeb Rebound Hardness Test, invented in the 1970s, uses the ratio of impact and rebound velocities (as measured by a magnetic inducer) to determine hardness.
Formerly headquartered in Houston, Texas, the company was founded as National Components Inc. in 1984 by Johnie Schulte and reincorporated in Delaware in 1991. [3] [8] In 1994, the company closed an agreement to purchase substantially all the assets and business of Ellis Building Components, Inc. located in Tallapoosa, Ga. [9] In 1998, they completed the acquisition of MetalBuilding Components ...
It is a provider and [3] distributor of value-added, engineered products for the North American concrete construction industry. [4] Dayton Superior has four main product lines of Concrete Accessories, Chemicals, Forming, and Paving with 117 patents for such products. [5] The headquarters is in Dayton, Ohio. [6]
Scratch hardness test or scratch test refers to any of a number of methods of measuring scratch hardness. Resistance to abrasion is less affected by surface variations than indentation methods. Scratch hardness is measured with a sclerometer. [1] Attempting to scratch a surface to test a material is a very old technique. [2]
TXI was founded in 1946. In 1994, with an annual revenue of $614M, the company ranked 500th on the Fortune 500 list by annual revenue. [2] [ FN 1]. In January 2014, Martin Marietta Materials (), a rival provider of construction materials, agreed to buy TXI for $2.06 billion in stock.