Railway engineering : classification of admixtures
There are eight types of admixtures, and their names and codes are as follows.
(1) High performance superplasticizer: early strength type high performance superplasticizer, HPWR-A; Standard high performance water reducer, HP-WR-S; Retarding type high performance water reducer, HPWR-R;
(2) High efficiency superplasticizer: standard type high efficiency superplasticizer, HwR-S; Retarding superplasticizer, HwR-R;
(3) Ordinary superplasticizer: early strength ordinary superplasticizer, WR_A; Standard type ordinary water reducer, WR-S; Retarding type ordinary water reducer, WR_R;
(4) air-entrained water-reducing agent: AEWR;
(5) Pumping agent: PA;
(6) Early strength agent: Ac;
(7) Retarding agent: Re;
(8) Air entrainment agent: AE.