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新拌混凝土中有害氣體的來源與原因分析

新拌混凝土中引入適量密閉、不易聚合、分散均勻且氣泡尺寸介于 0.05 ～ 1.27mm 的微小氣泡，不僅能夠改善新拌混凝土的和易性，而且能夠提高混凝土后期的耐久性，特別是抗凍融循環性能等。通?；炷恋暮瑲饬恐笜丝刂圃?2% ～ 5% ，過高的含氣量會直接導致混凝土的流動性、表觀質量、抗壓強度以及使抗沖擊耐磨性能急劇下降，嚴重時會導致整個混凝土結構的失效。相關研究人員提出：通過適當引氣的方法提高混凝土中的含氣量，可以增強混凝土的抗滲性能，當含氣量高超過 6% 時，抗滲性能急劇下降。因此，明確新拌混凝土中有害氣體的來源與產生原因，并采取有效抑制措施對保證混凝土結構的耐久性非常重要。本文基于新拌...
聚羧酸減水劑在普通混凝土中的應用

預拌商品混凝土順應可持續發展的戰略目標，發揮其節約資源、質量可靠、施工進度快、無環境污染等優勢，得到了普遍應用。在混凝土向高工作性、高強度、高耐久性以及高性能方向發展的形勢下，預拌混凝土為滿足高性能混凝土及混凝土施工技術的要求，大多都摻加了礦物混合材料或工業廢棄物，為了能夠保證混凝土的施工性能或相應的力學性能，這就需要減水率大、保塑性好、膠凝材料適應性好的高性能減水劑。
華軒高新功能可控制型聚羧酸減水劑

聚羧酸減水劑以其良好的分散性和分散保持性成為高性能混凝土減水劑發展的主要方向,已是混凝土工業高性能化的重要手段。國內對聚羧酸減水劑的合成工藝、工程應用做了大量的研究。分子結構的差異導致性能差異。

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