1796, an Englishman J. Parker burned a kind of cement with marl, which was brown in appearance, much like a mixture of lime and volcanic ash in ancient Rome, and named it Roman cement. It is also called natural cement because it is made of natural marl and contains no ingredients. It has good hydraulic and rapid setting characteristics, and is especially suitable for projects in contact with water.
Classification of extended data cement
Cement is divided into:
(1) Ordinary cement: cement commonly used in general civil engineering. General purpose cement mainly refers to six kinds of cement specified in GB 175—2007, namely portland cement, ordinary portland cement, slag portland cement, pozzolanic portland cement, fly ash portland cement and composite portland cement.
(2) Special cement: cement for special purpose. For example: G-class oil well cement and road portland cement.
(3) Characteristic cement: a kind of cement with outstanding performance. Such as: quick-hardening portland cement, low-heat slag portland cement, expanded sulphoaluminate cement, phosphoaluminate cement and phosphate cement.
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