| The cement paste premix may include admixtures such as accelerators or retarders, superplasticizers, pigments, or silica fume. |
| The subject of vapor barriers or retarders beneath concrete slabs on grade has long been controversial. |
| Contractors are also encouraged to use evaporation retarders when weather conditions could cause excessive water evaporation from the slab. |
| The literature is full of other, more complicated ways to measure optical anisotropy, usually using a combination of polarizers and retarders. |
| Table 1 lets you compare the permeance of some of the vapor retarders used in buildings. |
| The drivers are taught to use engine retarders instead of brakes, and if they have to use the brakes, to tap them lightly. |
