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首页> 外文会议>Tenth international conference on superplasticizers and other chemical admixtures 2012 >Calcium Nitrate Counteracting PCE Superplasticizer Retardation
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Calcium Nitrate Counteracting PCE Superplasticizer Retardation

机译：硝酸钙抵消PCE减水剂延迟

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摘要

Calcium nitrate (CN) has been used as a cement hydration accelerator in varying dosages in order to explore its potential to compensate hydration retardation caused by a polycarboxylic ether (PCE) superplasticizer. The initial setting time, obtained from Vicat needle penetration tests, was found to decrease for increasing CN dosage until 4 percent of the cement mass was added. For dosages beyond this amount, the initial setting time slightly increased. The detected alite and aluminate hydration products appeared to have an influence on the structure evolution during setting. It is assumed that the AFt needles destruct the C-S-H network, which could lead to lower needle penetration resistance.
机译：硝酸钙（CN）已以不同的剂量用作水泥水合促进剂，以探索其补偿由聚羧酸醚（PCE）减水剂引起的水合延迟的潜力。发现从维卡针刺试验获得的初始凝固时间会减少，以增加CN用量，直到添加4％的水泥质量。对于超过此剂量的剂量，初始凝固时间会略微增加。在凝固过程中，检测到的铝酸盐和铝酸盐水合产物似乎对结构演变有影响。假定AFt针破坏了C-S-H网络，这可能导致较低的针穿透阻力。

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