恶劣环境下机制砂混凝土的强度和耐久性能
陈正发 ， 刘桂凤 ， 秦彦龙 ， 徐建民
(1．山东理工大学建筑工程学院，山东淄博255049；2．山东凝易固砂浆科技有限公司，山东淄博255051)
摘要：在对原材料进行性能测试和混凝土配合比试验的基础上，对C30机制砂混凝土开展了高温
和冻融循环试验．对比研究了冻融循环、冻融循环后酸侵蚀和碱侵蚀3种情况下机制砂混凝土强
度、相对动弹模量的变化规律；对比研究了高温、高温后酸侵蚀和碱侵蚀3种情况下机制砂混凝土
强度、相对动弹模量的变化规律．结果表明：在试验温度和冻融次数范围内，机制砂混凝土在高温
和冻融循环后抗压强度、相对动弹模量显著降低，并随温度和冻融循环次数的增加其降低幅度有
增大趋势；机制砂混凝土在高温和冻融循环后，耐酸、碱侵蚀性能明显降低，温度越高、经受的冻融
循环次数越多，其耐酸、碱侵蚀能力越低，且以耐酸侵蚀能力为最低．
关键词：机制砂混凝土；恶劣环境；高温；冻融循环；强度；耐久性能
中图分类号：TU528．01 文献标志码：A doi：10．3969／j．issn．1007—9629．2O12．03．019
Strength and Durability of Concrete with M anufactured-Sand
in Severe Environment
CHEN Zheng—fa ， LIUGui—feng ， QIN Yan—long ， X【，Jian—rain。
(1．School of Architecture Engineering，Shandong University of Technology，Zibo 255049，China；
2．Shandong Ningyigu Mortar Technology Inc．，Zibo 255051，China)
Abstract：Nowadays，few people investigated the strength and durability of concrete with manufactured—
sand in severe environment．Experiment studies on C3 0 concrete with manufactured—sand were carried out
under condition of high temperature and freeze·—thaw cycles based on the testing of raw materials perform--
ances and concrete mix proportion．Comparative studies on the changing laws of the strength and the rela—
tive dynamic elastic modulus of concrete with manufactured—sand were made in some cases，including high
temperature and freeze-thaw cycles，acid corrosion after high temperature and freeze-thaw cycles and alkali
corrosion following high temperatures and freeze—thaw cycles． The results of tests indicate that the
strength and the relative dynamic elastic modulus of concrete with manufactured—sand decreases markedly
with the increase of temperature and the number of freeze—thaw cycles．The acid—and alkali—resistance of
concrete with manufactured—sand is also remarkably weakened due to the action of heating and freeze—thaw
cycles．The acid-and alkali—resistance，especially the acid-resistance of the concrete lowers with the in—
crease of temperature and the number of freeze—thaw cycles．
Key words：concrete with manufactured—sand；severe environment；high temperature；freeze-thaw cycle；
strength；durability
随着经济建设的飞速发展，土木建筑业空前活
跃，道路、桥梁、铁路、机场、城市建设、水利水电工程
等建设对混凝土的需求量大大增加，用砂量也逐年
攀升．据统计，中国仅建筑用砂石年均需求量约为

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