Physical and chemical parameters and grain size composition of mortar shall meet requirements specified in table 28.
耐火砌泥的物理及化学参数以及粒度分布应该满足表28中指定的要求。
The chemical shrinkage caused by cement hydration may bring out the volume change of mortar and concrete, and the appearance of cracking.
水泥水化反应引起的化学收缩会引起砂浆及混凝土的体积变化，可能会导致收缩裂缝的产生。
According to the strength change of the FKJ mortar sample immersed in the alkali, acid and slat solution, test its ability of chemical resistance.
通过FKJ砂浆试件在碱、酸及盐溶液中浸泡后强度变化，试验其耐化学腐蚀能力。
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