chemical expansion

The ground water with high salinity , high CO2 content and ground water of sulphate reducing bacteria corrode the cement by dissolving , chemical and expansion actions .

高矿化度地下水和高合CO2、硫酸盐还原菌的地下水，通过溶蚀、化学和膨胀对水泥石进行腐蚀，减低油井寿命。

Test Investigation on the Chemical Shrinkage or Expansion of Alkali-activated Cementing Materials

碱激发胶凝材料化学收缩或膨胀的试验研究

Clinical study of a new expander with an agent delivery system and the effect of a chemical agent on tissue expansion

带导药系统的快速扩张器的临床研究

The diagrams indicate that the region of high chemical durability and low expansion coefficient are restricted to glasses with high SiO 2 content .

这些图解指出高化学稳定性和低膨胀系数范围仅限于高SiO2含量区。

Chemical mechanism of rubber expansion in DME was analysed , and different rubber materials were selected to test the expansion , the tensile strength , the elongation at break , and the hardness .

分析了橡胶在二甲醚中溶胀的化学机理，并选出具有不同极性的橡胶材料进行耐二甲醚溶胀及溶胀前后拉断强度、拉断伸长率、硬度等力学性能的对比试验。