Te mau tao'a tahi mâmâ | Te mau rave'a haaparareraa parau teitei no te cellular concrete
Ua riro te hoê tao'a no te faaiti i te pape ei anoiraa o te nehenehe e tauturu i te faaiti i te faaohiparaa i te pape e ia haamaitai atoa i te roaraa e te ohipa o te raima. Te matamua te rave'a no te faaiti i te pape i te mau matahiti 1930 i roto i te United Kingdom. Ua hamanihia e te tahi atu mau nunaa mai ia Japan e te United States te mau ravea aravihi no te faaohipa i teie anoiraa.
I te rahiraa o te taime, E toru tuhaa o te mau anoiraa no te faaiti i te pape: Iho, Tahitoa, e teitei. Hau atu i te ahuru ma piti i nia i te hanere o te faaiti mai i te faito o te pape; ua faaiti te faito au noa i te reira hau atu i te pae ahuru i nia i te hanere; e te faarahi nei te faito teitei i te reira hau atu i te ahuru i nia i te hanere.
Te mau lignosulfonates, o te piha haapiiraa matamua ïa o te rave'a no te faaiti i te papes. Ua riro te reira ei anoiraa no te hoê electrolyte polymer e te hoê tao'a huru rau e nehenehe e reva i roto i te pape. E nehenehe teie na tao'a e piti e haaparare i te repo e te phosphate calcium, e nehenehe atoa ratou e haaparare i te mau hu'ahu'a ora e te mau hu'ahu'a zinc. Taa ê noa'tu i te faaohiparaahia ei te rave'a no te faaiti i te pape, E faaohipa-pinepine-hia teie mau tao'a ei mau ravea no te paruru i te pape.
Water reducing agents are usually made of an anionic surfactant. It has two parts: a hydrophilic group and a hydrophobic group. These are typically mixed with other chemicals.
Sodium lignosulfonate is a common te rave'a no te faaiti i te pape. Lignosulfonates can be used as a sulphonating agent and alkali neutralizing agent. They can also be used as a catalyst.
Melamine is a high-efficiency te rave'a no te faaiti i te pape. Melamine is prepared from a sulfonating agent and an aldehydic acid molecule. This type of te rave'a no te faaiti i te pape has very high efficiency and is suitable for engineering with a good flowability and excellent durability.