结晶器振动导致初凝坯壳受力和变形是产生铸坯表面裂纹的主要原因。
The stress and distortion of initial solidifying shell due to mold oscillation is the main reason of generating strand surface cracks.
保证混凝土在初凝之前，上下层的连续粘接，以保障混凝土的整体强度。
To ensure that in the initial setting of concrete before the row on the lower bond, so as to safeguard the overall strength of concrete.
待粘接料初凝后，用竹片等将多余的粘接料刮去，再用毛刷修理缝隙表面。
Material to be bonded after the initial setting, with bamboo and other materials scrape off excess adhesive, then brush the surface of the gap repair.
硅酸盐水泥的初凝时间不得早于45分钟，终凝时间不得迟于390分钟。
The initial setting time of Portland cement shall not be earlier than 45 minutes, final set time not later than 390 minutes.
本发明提供一种缩短水泥制品初凝时间，提高生产效率的水泥制品促凝方法。
The invention provides a cement product setting accelerating method which can shorten the initial setting time of the cement product and enhance the production efficiency.
提出了密封试样细管排液的体积变形测定方法，该方法可测定水泥石自初凝起的收缩。
A new method of volumetric deformation measurement is proposed, which can measure the shrinkage of cement paste from initial setting.
结果表明，随着铝酸钙水泥含量的增加，氧化镁系包埋料的初凝时间缩短，流动性变差；
The results show that, with the in- crease in CA cement content, the fluidity of MgO-based investment materials decreases and so does the initial setting time.
本研究采用四种不同初凝时间的建筑石膏，掺入S型石膏缓凝剂，进行了初凝时间的试验。
In this study, tests for initial setting time of plaster are conducted by adopting plaster with 4 different initial setting times and by adding s type retarder for plaster.
模框与底板形成一套模具，搅拌好的浆料通过浇注发泡、静养、初凝过程使之成为可以切割的坯体。
Mold to form a mold box with the bottom, stirred slurry by pouring foam and resting, the initial setting process of making the green body can be cut.
以微波对水泥制品辐射，使得水泥制品内的极性物质的游离态离子发生快速运动，使得水泥快速初凝。
Adopting the microwave to radiate the cement product enables free ions of polar substances in the cement product to move rapidly, thus leading to rapid initial setting of the cement.
通过缓凝三元复合制成缓凝高效减水剂，延长初凝时间至20小时以上，并且对混凝土后期强度无副作用。
Mix with setretarder could make compound dispersants setretarder superplasticizer which could extend initial setting time up to 20h and no negative effect on late compressive strength.
碾压混凝土初凝时间是确定层面允许间歇时间的主要依据，初凝时间的长短会影响到施工工艺和质量控制措施。
The RCC initial-set time is the main basis of determining layer intermission time. The length of initial-set time affects the construction techniques and quality control measures.
通过对两种不同板坯水槽设计形式进行热力耦合分析，研究了不同水槽设计对结晶器铜板及铸坯初凝坯壳温度分布影响。
The effect of different water groove design of the copper plates on the temperature distribution of the mold and the solidifying shell has been studied through thermo-mechanical coupled analysis.
当多余的水泥浆被留在井筒中时，在水泥浆初凝和变成不可流动以前用常规的方法（如反循环）不可能去除这些多余的水泥浆。
When excess slurry is left in the wellbore, it may not be possible to remove the excess slurry by conventional means, such as reverse circulation, before the slurry thickens and becomes immovable.
由于对顶板防水功能的要求很高，经多方案比较，决定选用初凝时间长、终凝时间短、利于大面积作业的高分子益胶泥防水技术。
Because the high demand on the waterproof function of roof high polymer easy plaster waterproof technology is chosen by several plans comparison.
水泥浆的有效浆柱压力是在初凝前还是在初凝后降低至水柱压力，直接关系到能不能在固井候凝过程中压稳地层流体、实现压稳防窜候凝。
The time when the cement slurry's column pressure reduces to the water column pressure before or after initial set is directly related to whether or not formation fluids flow out during wait-on-time.
试验结果表明，所用建筑石膏的初凝时间愈快，掺有S型缓凝剂后其初凝时间差愈大。所以，初凝时间差不宜作为石膏缓凝剂的缓凝效果指标。
The test results show that the quicker the initial set of plaster the greater the difference between the initial setting times of the plaster with addition of s type retarder.
排放初滤水，对反冲洗水进行混凝沉淀预处理后再回收，能提高滤后水的微生物学安全性。
The microbiological safety of filtered water can be improved by discharging initial filtered water and recovering backwash water after coagulation and sedimentation pretreatment.
半水石膏凝结硬化很快，其初终凝时间为6 ~30分钟，可操作时间只有5 ~10分钟，往往不能满足石膏基材料的成型与施工的需要。
Setting time of gypsum plaster is very short, usually only 6 ~ 30 min, and operation time is only 5-10 min, which cannot satisfy the practical plastering and construction of gypsum-based material.
结果表明：（1）高钙灰的掺入改善了胶砂的工作性，降低了标准稠度用水量，延缓了胶材的初终凝时间；
The results show: (1) with high calcium mixing, concrete workability was modified, the water quantity needed for standard consistence decreased, initial and final setting time increased;
结果表明：（1）高钙灰的掺入改善了胶砂的工作性，降低了标准稠度用水量，延缓了胶材的初终凝时间；
The results show: (1) with high calcium mixing, concrete workability was modified, the water quantity needed for standard consistence decreased, initial and final setting time increased;
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