Technologies
Each entry explains a technology, the problems it solves and its connections.
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Metallic cartridges
Developed in the mid-19th century; conversion applications around 1866 are the reference point verified in this review · matureMaterials · MilitaryMetallic cases hold ammunition components together and help seal breech-loading mechanisms, making them an important part of modern firearm systems.
Reinforced concrete
Developed from reinforced products into structural systems in the mid-to-late 19th century · matureIndustry · MaterialsConcrete incorporates reinforcing elements such as steel bars, which work together with it to improve tensile and flexural performance.
Limestone calcined clay cement
2009–2012: research on ternary systems; international technical validation began in 2014 · emergingIndustry · MaterialsCombines clinker, calcined clay, limestone and gypsum, using synergistic hydration to reduce the clinker content of cement.
Cement rotary kiln firing
Gradually adopted in industrial cement production in the late 19th century · matureEnergy · Industry · MaterialsA slowly rotating, inclined kiln moves and heats material, enabling continuous production of cement clinker.
Lime burning
Archaeological evidence of lime burning dates to around 10000 BCE · matureEnergy · Industry · MaterialsControlled heating of calcareous rock produces reactive lime, transforming natural rock into a workable raw material for binders.
Pozzolanic binder technology
Hydraulic applications combining lime and volcanic ash existed by at least the 1st century BCE · matureIndustry · MaterialsUses reactions between reactive siliceous and aluminous materials and calcium-bearing systems to form binding products; both ancient natural volcanic ash and some modern activated clays can participate in this mechanism.
Gunpowder (black powder)
Approximately the 9th–11th centuries: from early Chinese accounts to the Wujing Zongyao (《武经总要》) · matureMaterials · MilitaryThe chemical energy source for early firearms, also used in engineering blasting; this entry covers black powder rather than later smokeless propellants.
Charcoal production
Known in antiquity; became a metallurgical fuel before and around modern industrialization · matureEnergy · Industry · MaterialsHeating wood with no oxygen or limited oxygen to obtain a solid fuel with a higher fixed-carbon content and better suitability for high-temperature combustion.
Control of fire
Archaeological evidence of controlled fire use appears from about 1 million years ago · matureEnergy · MaterialsIgniting, sustaining, regulating, and using flames turns combustion in the environment into a repeatable source of heat.
Cement
Hydraulic binders existed in ancient Rome; modern industrial cement developed in the 18th–19th centuries · matureIndustry · MaterialsA binder that reacts with water to form hardened products, joining particles or components into a whole; Portland cement is one type.
Concrete
Mature applications existed in ancient Rome; modern cement concrete developed widely in the 19th century · matureIndustry · MaterialsA composite material made by mixing and shaping a binder, fine and coarse aggregates, and water, then allowing it to harden for use in structures.
Portland cement
1824: Portland cement patent; key advances in clinker production in the 1840s · matureIndustry · MaterialsA hydraulic binder made by firing a prepared mix of calcareous and siliceous/aluminous raw materials into silicate clinker, then grinding it with gypsum and other materials.
Lime mortar
Used in antiquity; the sources in this review confirm established lime-binding practices in ancient Rome · matureIndustry · MaterialsA workable masonry or repair material made from lime, sand, and water; traditional air-hardening formulations harden mainly through carbonation.
Metal smelting
Early metal smelting appeared from around 5000 BCE; large-scale furnace workshops emerged in the Bronze Age · matureEnergy · Industry · MaterialsExtracts metals from ores using controlled high temperatures and a reducing environment, then produces usable materials through melting, casting, or forging.
Photovoltaic cell
1839: discovery of the photovoltaic effect; 1954: silicon photovoltaic cells became practical for power generation · matureEnergy · Industry · MaterialsA device that uses the photovoltaic effect in semiconductors to convert solar radiation directly into direct-current electricity.