深度越大，为完成注水泥作业所需的时间越长，而且由于升高的温度对水泥浆凝固过程的影响，因而对水泥浆缓凝的需求也越高。
The need for cement retardation increases with depth due to the greater time required to complete the cementing operation and the effect of increased temperature on the cement-setting process.
介绍了改性木质素磺酸盐PQ的合成工艺，评价了PQ对水泥浆稠化时间的影响及在高密度体系中的应用，同时考察了PQ对温度的敏感性。
The compounding technique of PQ was described and its influences to cement thickening time and application in high density cement system were evaluated, as well as its temperature sensitivity.
根据试验结果，聚羧酸外加剂在拌制水泥浆尤其是混凝土的性能表现，受所用水泥品质和使用时水泥的温度影响。
The results show that The performances of polycarboxylic admixtures for producing pastes , especially for concretes, depend on cement varieties and their temperature statuses.
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