Bitumen is an immensely viscous constituent of petroleum. Depending on its exact composition it can be a sticky, black liquid or an apparently solid mass that behaves as a liquid over very large time scales. In the U.S., the material is commonly referred to as asphalt. Whether found in natural deposits or refined from petroleum, the substance is classed as a pitch. Prior to the 20th century the term asphaltum was in general use. The word derives from the ancient Greek ἄσφαλτος ásphaltos, which referred to natural bitumen or pitch. The largest natural deposit of bitumen in the world is the Pitch Lake of southwest Trinidad, which is estimated to contain 10 million tons.
Concrete is a composite material composed of aggregate bonded together with a fluid cement that cures over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminium combined.
Gravel is a loose aggregation of rock fragments. Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.
A road surface or pavement is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or walkway. In the past, gravel road surfaces, macadam, hoggin, cobblestone and granite setts were extensively used, but these have mostly been replaced by asphalt or concrete laid on a compacted base course. Asphalt mixtures have been used in pavement construction since the beginning of the 20th century and are of two types: metalled (hard-surfaced) and unmetalled roads. Metalled roadways are made to sustain vehicular load and so are usually made on frequently used roads. Unmetalled roads, also known as gravel roads or dirt roads, are rough and can sustain less weight. Road surfaces are frequently marked to guide traffic.
A gravel pit is an open-pit mine for the extraction of gravel.
Asphalt concrete is a composite material commonly used to surface roads, parking lots, airports, and the core of embankment dams. Asphalt mixtures have been used in pavement construction since the beginning of the twentieth century. It consists of mineral aggregate bound together with bitumen, laid in layers, and compacted.
Permeable paving surfaces are made of either a porous material that enables stormwater to flow through it or nonporous blocks spaced so that water can flow between the gaps. Permeable paving can also include a variety of surfacing techniques for roads, parking lots, and pedestrian walkways. Permeable pavement surfaces may be composed of; pervious concrete, porous asphalt, paving stones, or interlocking pavers. Unlike traditional impervious paving materials such as concrete and asphalt, permeable paving systems allow stormwater to percolate and infiltrate through the pavement and into the aggregate layers and/or soil below. In addition to reducing surface runoff, permeable paving systems can trap suspended solids, thereby filtering pollutants from stormwater.
CRH plc is an international group of diversified building materials businesses whose headquarters is in Dublin, Ireland. It manufactures and supplies a wide range of products for the construction industry. The group was formed through a 1970 merger of two leading Irish public companies, Cement Limited and Roadstone Limited (1949). CRH's primary listing is on the New York Stock Exchange since 2023, prior to which it was on the London Stock Exchange and on Euronext Dublin.
Vulcan Materials Company is an American company based in Birmingham, Alabama. It is principally engaged in the production, distribution and sale of construction materials. Vulcan is the largest producer of construction materials, primarily gravel, crushed stone, and sand, and employs approximately 12,000 people at over 400 facilities. Vulcan serves 22 states, the District of Columbia, Mexico, Canada, Bahamas and the U.S. Virgin Islands. 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.
Concrete recycling is the use of rubble from demolished concrete structures. Recycling is cheaper and more ecological than trucking rubble to a landfill. Crushed rubble can be used for road gravel, revetments, retaining walls, landscaping gravel, or raw material for new concrete. Large pieces can be used as bricks or slabs, or incorporated with new concrete into structures, a material called urbanite.
Granite Construction Inc. is a civil construction company and aggregate producer, a member of the S&P 600 Index based and founded in Watsonville, California, and is the parent corporation of Granite Construction Company. The company is both a heavy civil construction contractor and construction aggregate manufacturer, owning or leasing quarries in several Western states for extracting mostly sands, gravel, and crushed stone products. The company was under investigation from the SEC from 2019 to 2021 for misrepresenting revenue, and as a result paid fines to settle disputes with shareholders, and avoided delisting from the NYSE.
Construction aggregate, or simply aggregate, is a broad category of coarse- to medium-grained particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined materials in the world. Aggregates are a component of composite materials such as concrete and asphalt; the aggregate serves as reinforcement to add strength to the overall composite material. Due to the relatively high hydraulic conductivity value as compared to most soils, aggregates are widely used in drainage applications such as foundation and French drains, septic drain fields, retaining wall drains, and roadside edge drains. Aggregates are also used as base material under foundations, roads, and railroads. In other words, aggregates are used as a stable foundation or road/rail base with predictable, uniform properties, or as a low-cost extender that binds with more expensive cement or asphalt to form concrete. Although most kinds of aggregate require a form of binding agent, there are types of self-binding aggregate which require no form of binding agent.
Graniterock is an American corporation, founded in 1900 as "Granite Rock", and based in Watsonville, California. It operates in the construction industry providing crushed gravel, sand, concrete, asphalt and paving services.
Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from naturally occurring gravel, which is produced by natural processes of weathering and erosion and typically has a more rounded shape.
Superior Industries, Inc. is an American manufacturing company headquartered in Morris, Minnesota. The company engineers, manufactures, sells and supports dry bulk processing and handling equipment and components. In 2008, Superior acquired Westmor Industries, a manufacturer and distributor of energy storage, transportation and dispensing equipment also headquartered in Morris.
Teichert, a private company, is an infrastructure and site development contractor and a construction materials producer. The company's construction services include mass grading, asphalt paving, concrete curbs and sidewalks, underground pipelines, and joint utility installations. The construction materials businesses produce crushed stone, sand, gravel, asphalt concrete, ready-mix concrete, and precast concrete products. Additionally, the Teichert Foundation, a nonprofit organization, awards grants to community organizations and provides employee-matching grants.
Tarmac is a British building materials company headquartered in Solihull, England. The company was formed as Lafarge Tarmac in March 2013, by the merger of Anglo American's Tarmac UK and Lafarge's operations in the United Kingdom. In July 2014, Anglo American agreed to sell its stake to Lafarge, to assist Lafarge in its merger with Holcim and allay competition concerns.
Breedon Group plc is a British construction materials company which has its headquarters at Breedon on the Hill, Leicestershire, England. The current chairman is Amit Bhatia, son-in-law of Lakshmi Mittal, the billionaire steel magnate who became a Breedon shareholder following the acquisition of Hope Construction Materials. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.
In 2017, the aggregate industry in the United States mined and sold 2.12 billion metric tons of crushed rock, sand and gravel valued at US$20.9 billion. There are thousands of aggregate-producing companies in the US, operating in each of the 50 states, and employing 105,000 people. Most aggregate is used by the construction industry, where it is an essential raw material and the main ingredient in concrete and asphalt concrete.
Tilcon Connecticut, commonly known as Tilcon, is a construction and aggregates company located in the U.S. state of Connecticut. It was founded in 1923 as Angelo Tomasso Inc. As of 2021, the company is a subsidiary of CRH America, which purchased Tilcon in 1996. Tilcon primarily manufactures crushed stone, asphalt, and concrete. The company also works as a construction contractor.
$7 Billion