Project @ a Glance

Contents on the CD Rom

• Aggregate is defined as a granular material used in construction, which may be natural, manufactured or re-cycled.
• Construction aggregate, or simply "aggregate", is a broad category of coarse particulate material used in construction, including sand, gravel, crushed stone, slag, and recycled concrete.
• Aggregates are a component of composite materials such as concrete and asphalt concrete; the aggregate serves as reinforcement to add strength to the overall composite material.
• Natural Aggregates or Primary Aggregates are naturally occurring materials of rock, sand and gravel. These are extracted directly from land or marine sources for use in construction.
• Secondary Aggregates or Manufactured Aggregates are by-products of industrial processes such as steel slag or pulverised fuel ash from power stations.
• Secondary Aggregates also include Mineral Wastes, which are materials arising as a by-product of mineral extraction. They are capable for use, either with or without further treatment, as a primary aggregate substitute, e.g. slate waste and certain crushed rock fines.
• Recycled Aggregates are previously used materials that are capable of being substituted for primary aggregates. These include waste material from construction operations; the demolition of buildings or structures and railway ballast.
• Most lightweight aggregate is produced from materials such as clay, shale, or slate.
• Blast furnace slag, natural pumice, vermiculite, and perlite can be used as substitutes.
• To produce lightweight aggregate, the raw material (excluding pumice) is expanded to about twice the original volume of the raw material.
• The expanded material has properties similar to natural aggregate, but is less dense and therefore yields a lighter concrete product.
• Lightweight aggregate is a type of coarse aggregate that is used in the production of lightweight concrete products such as concrete block, structural concrete, and pavement.
• Homes, offices, warehouses, shopping centers, and workplaces all require foundations composed of aggregate, as well as concrete footers, asphalt parking lots, manufactured bricks, blocks and poured walls.
• According to the USGS, U.S. crushed stone production was 1.69 billion tonnes valued at $12.1 billion, of which limestone was 1,090 million tonnes valued at $7.49 billion from 1,904 quarries, granite was 263 million tonnes valued at $2.16 billion from 339 quarries, traprock was 130 million tonnes valued at $1.04 billion from 348 quarries, and the balance other kinds of stone from 597 quarries.
• Currently, total U.S. aggregate demand by final market sector was 30%-35% for non-residential building (offices, hotels, stores,
  manufacturing plants, government and institutional buildings, and others), 25% for highways, and 25% for housing.
• Aggregates themselves can be recycled as aggregates. Unlike deposits of sand and gravel or stone suitable for crushing into aggregate, which can be anywhere and may require overburden removal and/or blasting, "deposits" of recyclable aggregate tend to be concentrated near urban areas, and production from them cannot be raised or lowered to meet demand for aggregates.

• Aggregate
• Construction aggregate
• Aggregate Information
• Construction Aggregates- Building Block Profile

Production Process

• Aggregate Production
• Aggregate production: Fines generation during rock crushing
• Growth Process for Fractal Polymer Aggregates Formed by Perfluoro-octyltrimethoxysilane
• Production of High Quality Granite Aggregates as a Feedstock for high technology Construction Material
• Lightweight Aggregate Manufacturing
• Mine-to-Mill™ optimisation of aggregate production
• Improving the Aggregate Production Process
• Artificial Intelligence Based Quality Control of Aggregate Production
• Aggregate Production and Stockpiling

Company Profiles

• Company in Louisiana
• Company in Auckland
• Company in Texas
• Company in England
• Company in New York
• Company in Scotland
• Company in United Kingdom
• Another Company in UK
• Company in North Carolina
• Company in Nashville
• Another Company in Texas

Aggregate Producers Association

• Association in British Columbia
• Association in North Carolina
• Association in Indiana
• Association in Louisiana
• Association in Maryland
• Association in Michigan
• Association in Ohio

Consultants

• Consultants in Arkansas
• Aggregates Experts
• Consultants in Virginia
• Consultants in China
• Consultants in Indiana

Patent

• Titanium dioxide aggregates process for producing same and electrophotographic photosensitive material containing same
• Aggregate, manufacturing process thereof, and resin mortar
• Lightweight aggregate and process for its production
• Uses for cellulose-containing aggregates
• Reclamation of unset concrete aggregates
• Method of making light-weight concrete aggregate

Technology

• High Density Concrete with Ceramic Aggregate based on depleted Uranium Dioxide
• Production of Construction Aggregates from Flue Gas Desulfurization Sludge
• Implementing Geomatics Technology for Aggregate Exploration
• Construction Aggregate from Scrap glass
• Technology of Slag Utilization in Highway Construction
• A Tool Kit for Using Recycled Glass as a Construction Aggregate

Applications

• Use of Ash
• Environmental Uses of Aggregate
• Perlite Aggregate for Lightweight Insulating Concrete
• Aggregate Uses