防火阻燃布检测标准,胶水检测机构
拌制砂浆和混凝土用粉煤灰理化性能要求:
项 目 | 理化性能要求 | |||
Ⅰ级 | Ⅱ级 | Ⅲ级 | ||
细度(45μm方孔筛筛余)/% | F类粉煤灰 | ≤12.0 | ≤30.0 | ≤45.0 |
C类粉煤灰 | ||||
需水量比/% | F类粉煤灰 | ≤95 | ≤105 | ≤115 |
C类粉煤灰 | ||||
烧失量(Loss)/% | F类粉煤灰 | ≤5.0 | ≤8.0 | ≤10.0 |
C类粉煤灰 | ||||
含水量/% | F类粉煤灰 | ≤1.0 | ||
C类粉煤灰 | ||||
三氧化硫(SO3)质量分数/% | F类粉煤灰 | ≤3.0 | ||
C类粉煤灰 | ||||
安定性(雷氏法)/(mm) | C类粉煤灰 | ≤5.0 | ||
强度活性指数/% | F类粉煤灰 | ≥70.0 | ||
C类粉煤灰 |