anhydrite gypsum造句

• The effects of gypsum on fluidity of cement mortar and setting time of cement paste are not significant when it used as retarder of cement . whereas , when 0 . 3 % ca - lignosulphonate or ca - solassate added in cement used anhydrite gypsum as retarder , loss of fluidity of cement mortar is rapid , quick setting is occurred
  但是，在硬石膏调凝水泥中掺加0 . 3的木钙和糖钙缓凝减水剂却能使水泥砂浆流动度经时损失加快，净浆表现出促凝现象，发生外加剂与水泥的不相容问题。