Influence of cationic polyurethane on mechanical properties of cement based materials and its hydration mechanism
Influence of cationic polyurethane on mechanical properties of cement based materials and its hydration mechanism
复制标题
阳离子聚氨酯对水泥基材料力学性能的影响及其水化机理
DOI：
10.1016/j.conbuildmat.2016.12.162
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发表时间：
2017-04
影响因子：
7.4
通讯作者：
Rui Wang
中科院分区：
文献类型：
--
作者：
Jinhui Tang;Jiaping Liu;Cheng Yu;Rui Wang
采用阳离子聚氨酯（PUC）对水泥基材料进行改性。同时，采用等温量热法、定量X射线衍射法和扫描电镜对水化动力学、矿物相组成和水化产物的微观结构进行了研究。结果表明，PUC的掺入促进了水泥的水化，改变了水化产物的矿物组成和形貌，从而改变了水泥基材料的微观结构。结果表明，PUC的掺入降低了水泥基材料的脆性，特别是在早期。当PUC掺量为0.5%时，作为最佳掺量，硬化水泥浆体的1d、3d和7 d抗拉强度分别比素水泥基材料提高了49.92%、93.63%和88.44%，同时抗折强度也相应提高了8.38%、26.61%和36.40%。而砂的加入，由于界面区的引入，将削弱甚至消除这种韧性改善的益处。
The cation polyurethane (PUC) was used to improve the mechanical property of cement-based materials. Meanwhile, hydration kinetics, mineral phase compositions and microstructure characterization of hydration products were also investigated by isothermal calorimetry, quantitative X-ray diffraction and scanning electron microscope. The results show that the addition of PUC accelerated the cement hydration, altered the mineralogical compositions and morphology of hydration products, and correspondingly the microstructure of cement based materials. It is found that the addition of PUC decrease the brittleness of cement-based materials, especially for the early age. When the dosage of PUC is 0.5%, as the optimal mixing amounts, the tensile strengths of hardened cement pastes at 1 day, 3 day and 7 day separately increase by 49.92%, 93.63% and 88.44%, simultaneously the flexural strengths also exert corresponding increases by 8.38%, 26.61% and 36.40%, comparing with the plain cement-based materials. While, the addition of sand, will migitigate or even eliminate this toughness improving benefit due to the introduction of interfacial zone.
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影响因子：
64.8
作者：
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通讯作者：
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影响因子：
1.5
作者：
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影响因子：
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作者：
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