初凝时间

采用0.25MNaH2PO4/Na2HPO4调和液调和，其初凝时间为4min，终凝时间为15min，满足临床手术要求。

The powder were mixed with 0.25M NaH2PO4 / Na2HPO4 solution . Its initial setting time was about 4 min , the final setting time was about 15 min.

一种测试水泥初凝时间的新方法

A New Method for Testing Initial Setting Time of Cements

固化物初凝时间短，初凝4h后人可行走；

Short initial set time ;

NaF的速凝效果十分显著，当掺量只有02%时就可以使水泥的初凝时间控制在5分钟，终凝控制在10分钟。

0.2 % NaF can control the prehardening time in 5 minutes and final setting time in 1 minute .

它制浆后，初凝时间为60min，终凝时间210min。

In slurring , its initial setting time is 60 min and the final , 210 min.

结果表明：2种骨水泥的凝结时间基本相同，初凝时间为5min左右，终凝时间为19.5min；

The solidifying time of these bone cements is similar , 5 min initially and 19.5 min finally .

研究结果表明：抛光砖粉作水泥混合材时，水泥的标准稠度用水量增加，初凝时间缩短、终凝时间略有延长；水泥28d胶砂强度活性指数可达82%；

The results showed that the water requirement for normal consistency of cement increased and the early setting time shortened as well as the final setting time prolonged , the 28d activity index of cement mortar reached 82 % .

当该减水剂推荐用量为0.8%时，减水率可达20%以上，初凝时间在6.5h以上。

The water reducing ratio is more than 20 % while the initial set time is over 6.5 hours as the proportion of the water reducing agent to cement is suggested to be at 0.8 % .

因此使其具有正常的初凝时间和较高的早期强度。

Therefore , phosphorous slag cement has a higher early strength .

碾压混凝土初凝时间测试新方法电动势法

A new method for measuring initial setting time of roller compacted concrete

该转折点对应的时间为碾压混凝土拌和物的初凝时间。

The time opposes to this turning point is the initial setting time .

碾压混凝土初凝时间测定方法探讨

Discussions on RCC Initial-set Time Measurement method

给出了可用于6090℃、初凝时间为610小时的3个基本配方。

Three basic formulas are given for use at 60-90 ℃ with gelation time 6-10 hrs .

相对于不掺粉煤灰的空白试样而言，初凝时间从27分钟延长到54分钟。

Compared with black sample , the early setting time is extended from 27 minutes to 54 minutes .

初凝时间延缓，终凝时间基本提前；

The initial setting time is delayed , and the final setting time is ahead of time basically ;

结果发现：由于加入纤维蛋白胶，复合支架材料在一定程度上延长了磷酸钙骨水泥的初凝时间，但并不影响磷酸钙骨水泥的终凝时间；

The results show that the FG prolongs initial setting time , but does not influence final setting time .

两种减水剂对该水泥初凝时间影响不大，而终凝时间明显缩短；

The influence of the two water reducer on the initial setting time were little but shortened the final setting time remarkably .

通过对碾压混凝土具有触变复原性质的贯入阻力临界值的研究，探讨了其初凝时间的确定方法。

The criterion of probe resistance of rehabilitation nature was studied in order to explore the measurement method of RCC initial-set time .

赤泥充填料固结体的72小时抗压强度随固化温度的升高基本不变，但初凝时间缩短。

The intensity of the concretion body is unaltered along with the rising of the solidified temperature . But the initial setting time is shortened .

添加1～2%MPC胶泥的初凝时间较为适合泥塑的捏制并且收缩率较低。

Adding 12 % MPC could result in a shorter primary setting time which was suitable for the kneading of clay sculptures and lower shrinkage ratio .

本文研究了沙柳水抽提物及其与化学助剂的共同作用对石膏水化时间的影响，探讨了化学助剂的添加量与初凝时间的相关性。

A study on the influence of water extractive of Salix Mongolia and it effect together with some chemical aided-agents on the setting time of gypsum .

通过比较凝结期起止时间和实测的凝结时间，发现凝结期开始时间与初凝时间非常吻合，而凝结期终止时间则明显滞后于终凝时间。

The starting time of setting stage is identical with initial setting time . However , the ending time of setting stage lags behind the final setting time .

所以，初凝时间差不宜作为石膏缓凝剂的缓凝效果指标。

Therefore , it is not appropriate to use the difference between the initial setting times as the index of the retarding effect of the retarder for plaster .

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 .

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 .

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。

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 .

煤矸石粉煤灰混合浆体泌水率低（小于4%），有利于缩短初凝时间，减少采场充填工作面泄水量。

The low bleeding rate ( less than 4 % ) of mixed slurry of coal gangue and powder coal is conducive to shorten the initial setting time , and reduce water leakage .

这些影响主要包括两方面，一是凝结时间太长，有时初凝时间可达12小时以上；二是早期强度太低。

The effects mainly include two aspects , one is a long setting time , sometimes the initial setting time is up to 12 hours ; Secondly , the early strength is very low .

通过大量试验分析研究环境温度、相对湿度及风速等因素对碾压混凝土初凝时间及相应贯入阻力的影响规律，并通过计算建立相互之间的数学模型。

Through a series of tests it is established that relations between RCC initial setting time and its penetration resistance vary with factors of surrounding temperature , relative humidity , wind velocity , and others .

随着锂渣掺量的提高混凝土的初凝时间有所推后，而混凝土的开裂时间与其初凝时间密切相关，故其开裂时间亦有所推后。

With the improvement of lithium slag concrete admixture of the initial crack , and some delay time concrete crack length and initial setting time , so closely related to its cracking time also has pushed .