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。
The addition of calcined kaolin to cement increased the chemical shrinkage of cement stone, but it had no distinct impact on the self-shrinkage of cement stone.
煅烧高岭土掺入水泥中，增加了水泥石的化学收缩，对水泥石的自收缩的影响并不明显。
Test investigation on the chemical shrinkage or expansion of alkali-activated cementing materials and water-cement were carried out in this paper, in which water-cement was as control sample.
本文对碱激胶凝材料与水-水泥体系的化学收缩或膨胀进行了试验研究，其中以水-水泥体系为对比样。
The causes for dry shrinkage of elastic knit are described. The influences of thermodynamic, chemical and time-relative parameters on dry shrinkage of elastic knit are analyzed.
介绍了弹性针织物产生干收缩的原因及热力学的、化学的和与时间有关的参数对弹性针织物干收缩的影响。
Owing to both physical and chemical properties of metal material, there are inevitably shrinkage cavities, porosity and segregation in ingots.
由于钢锭内部不可避免地存在偏析、疏松、缩孔及微裂纹等冶金缺陷。
The influence of chemical composition, inoculation process, temperature of molten iron and pouring system on the formation of shrinkage cavity and porosity was described.
叙述化学成分、孕育工艺、铁液温度及浇注系统等因素对薄壁球铁铸件缩孔和缩松形成的影响。
By controlling the chemical composition, choosing suitable inoculants and its adding amount and using Te coating, the shrinkage causing leakage could be reduced markedly.
通过控制铁液的成分，选择合适的孕育剂种类和加入量，对缩松部位涂刷碲涂料等控制措施，可有效控制缩松引起的渗漏。
By controlling the chemical composition, choosing suitable inoculants and its adding amount and using Te coating, the shrinkage causing leakage could be reduced markedly.
通过控制铁液的成分，选择合适的孕育剂种类和加入量，对缩松部位涂刷碲涂料等控制措施，可有效控制缩松引起的渗漏。
应用推荐