The strength character of lean concrete road base material influenced by age and the amount of fly-ash used in it was studied through test in the lab.
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美
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通过室内试验,研究了不同粉煤灰掺量、不同龄期对贫混凝土基层材料强度的影响规律,并与不掺粉煤灰贫混凝土的强度特性进行了对比研究。
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海词词典,十七年品牌