File:Portland_Cement_Bags.jpg · Wikimedia Commons · See Wikimedia Commons
Wikidata facts
- Instance of
- building material
- Subclass of
- cement
- Named after
- Isle of Portland
- Material used
- lime
- Image
- Portland cement CEM I 42,5 R (bag).jpg
Show 8 more facts
- Commons category
- Cement
- NIOSH Pocket Guide ID
- 0521
- immediately dangerous to life or health
- 5000
- vapor pressure
- 0
- time-weighted average exposure limit
- 10
- time of discovery or invention
- 1824-00-00
- on focus list of Wikimedia project
- WikiProject Climate change
- discoverer or inventor
- Joseph Aspdin
via Wikidata · CC0
~32 min read
Encyclopedic overview
Bags of Portland cement wrapped and stacked on a pallet. Blue Circle Southern Cement works near Berrima, New South Wales, Australia.
Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone. It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker, and then grinding the clinker with the addition of several percent (often around 5%) gypsum. Several types of Portland cement are available. The most common, historically called ordinary Portland cement (OPC), is grey, but white Portland cement is also available.
Excerpted from Wikipedia’s “portland cement” article, available under the CC BY-SA 4.0 licence.