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光缆用PBT松套管材料的热水解性能的实验研究(一) 被引量:4
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作者 胡战洪 蔡泽发 +1 位作者 苏玉珍 包宏前 《网络电信》 2004年第3期33-35,共3页
本文着重讨论了抗张强度测试法在PBP松套管材料热水解性能研究中的应用,对有矩形截面的哑铃状试样在两种不同的实验条件下进行了实验和讨论,给出了考查PBT原材料热水解性能优劣的最佳实验条件,并对材料热水解性能的判定进行了实验研... 本文着重讨论了抗张强度测试法在PBP松套管材料热水解性能研究中的应用,对有矩形截面的哑铃状试样在两种不同的实验条件下进行了实验和讨论,给出了考查PBT原材料热水解性能优劣的最佳实验条件,并对材料热水解性能的判定进行了实验研究,确定了材料热水解性能判定参数的典型值。另外对抗张强度测试法在管状试样的热水解性能方面的应用进行讨论。 展开更多
关键词 光缆 PBT松套管材料 热水解性能 抗张强度
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Effects of H_3PO_4 and Ca(H_2PO_4)_2 on mechanical properties and water resistance of thermally decomposed magnesium oxychloride cement 被引量:14
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作者 文静 余红发 +3 位作者 李颖 吴成友 董金美 郑利娜 《Journal of Central South University》 SCIE EI CAS 2013年第12期3729-3735,共7页
The effects of H3PO4 and Ca(H2PO4)2 on compressive strength, water resistance, hydration process of thermally decomposed magnesium oxychloride cement (TDMOC) pastes were studied. The mineral composition, hydration... The effects of H3PO4 and Ca(H2PO4)2 on compressive strength, water resistance, hydration process of thermally decomposed magnesium oxychloride cement (TDMOC) pastes were studied. The mineral composition, hydration products and hydration heat release were analyzed by XRD, FT-IR, SEM and TAM air isothermal calorimeter, etc. After being modified by H3PO4 and Ca(HzPO4)2, the properties of the TDMOC are improved obviously. The compressive strength increases from 14.8 MPa to 48.1 MPa and 37.1 MPa, respectively. The strength retention coefficient (Kn) increases from 0.38 to 0.99 and 0.94, respectively. The 24 h hydration heat release decreases by 10% and 4% and the time of hydration peak appearing is delayed from 1 h to about 10 h. The XRD, FT-IR and SEM results show that the main composition is 5Mg(OH)z'MgCIz'8H20 in the modified TDMOC pastes. The possible mechanism for the strength enhancement was discussed. The purposes are to extend the potential applications of the salt lake magnesium resources and to improve the mechanical properties of TDMOC. 展开更多
关键词 thermally decomposed magnesium oxychloride cement (TDMOC) H3PO4 Ca(H2PO4)2 STRENGTH water resistance hydration heat
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