Concrete Thermal Conductivity Concrete thermal conductivity is a measure of the ability of concrete to transfer heat energy. It is usually expressed in watts per meter Kelvin (W m-1 K-1). The thermal conductivity of normal concrete is around 2.25 W m-1 K-1, however, it decreases linearly with increasing fractions of glass bubbles, reaching as low […]
What Is Cracking in Concrete? Cracking in concrete is caused by a variety of factors such as shrinkage, settlement, thermal movement and corrosion. Shrinkage occurs when the concrete loses moisture over time and begins to deteriorate in size. Settlement is when the underlying ground moves causing the slab of concrete to move with it which […]
What Is Scabbling Concrete? Scabbling, also known as scappling, is a method used to roughen surfaces or reduce concrete levels by removing a thin layer from the top. The technique is typically done using pressurized air equipment, but with the use of water jet scabbling, highly pressurized water is used to achieve the same effect. […]
What Is A Dowel Bar Retrofit? Dowel Bar Retrofit (DBR) is a way to strengthen cracks in road pavement by inserting steel dowels into cuts made across the cracks. This technique has been effectively used by transportation departments in several U.S. states to fix issues with older jointed concrete pavements. The typical process involves cutting […]
What Is Engineered Cementitious Composite (ECC) Concrete? ECC concrete stands for Engineered Cementitious Composite, which is a special shape-memory cement material that utilizes recycled materials such as fly ash, steel fibers and microfibers. It is an ultra high performance advanced concrete that is engineered to be stronger than conventional concrete and can withstand more extreme […]
What Is A Metakaolin in Concrete? Metakaolin, which is the anhydrous, calcined version of the clay mineral kaolinite, is a pozzolanic material that is commonly used in the production of concrete. It is created by heating china clay, or kaolin, to a temperature between 600 and 800ºC. Because it is manufactured specifically for use, rather […]
What Is A Stamped Asphalt in Construction? Stamped asphalt is a decorative paving material that is made by imprinting patterns, such as brick or stone, onto regular asphalt using heat, a stamping template, and a plate compactor. It is generally less expensive than traditional hand-laid materials and provides a durable, long-lasting surface that is resistant […]
What Is Asphalt Concrete? Asphalt concrete, also known as asphalt or blacktop, is a composite material made up of aggregate such as sand and gravel bound together by asphalt binder. It can be laid in layers on roads, driveways and parking lots as a cost-effective alternative to concrete. Asphalt concrete is low-maintenance and can resist […]
What Is A Hollow Core Slab Construction Method? A hollow core slab, also called a voided slab or a concrete plank, is a precast piece of prestressed concrete that is commonly used in the construction of floors in multi-story apartment buildings. It is particularly popular in countries where precast concrete is preferred for home construction, […]
What Is The Process Of Mine Reclamation? Mine reclamation is restoring a mined area to its previous natural state or acceptable and safe land use while preserving its long-term productivity. The process may include activities such as soil sampling, soil stabilization, and replacement, topsoil replacement, revegetation with native plants and trees, construction of levees and […]