橡胶集料自密实混凝土的毛细吸水特性研究

发布时间：2018-08-01 13:16

【摘要】：采用ISAT(initial surface absorption test)方法,通过对比试验研究了橡胶集料自密实混凝土(RSCC)和普通橡胶集料混凝土(ORC)的毛细吸水特性,分析了水胶比和橡胶掺量对RSCC毛细吸水性能的影响,并建立了新的RSCC毛细吸水模型.结果表明:在水胶比和橡胶掺量相近的情况下,RSCC的毛细吸水性能低于ORC;当水胶比相同时,橡胶掺量越大,RSCC的毛细吸水性能越弱;当橡胶掺量相同时,水胶比越低,RSCC的毛细吸水性能越弱;ORC的毛细吸水性能对水胶比变化的敏感程度较高.引用相关文献建立的橡胶集料混凝土的渗透模型对RSCC的毛细吸水试验结果进行了拟合,试验结果与拟合结果的相关系数均大于0.860 0.初始阶段毛细吸水系数的大小能够反映RSCC毛细吸水能力的强弱.
[Abstract]:The capillary water absorption characteristics of rubber aggregate self-compacting concrete (RSCC) and ordinary rubber aggregate concrete (ORC) were studied by ISAT (initial surface absorption test) method. The effects of water / binder ratio and rubber content on the capillary water absorption of RSCC were analyzed. A new RSCC capillary water absorption model was established. The results show that the capillary absorptivity of RSCC is lower than that of ORC when the ratio of water to binder is similar to that of rubber, the larger the ratio of water to binder is, the weaker the capillary absorptivity of RSCC is, and when the content of rubber is the same, The lower the water-binder ratio is, the weaker the capillary absorptivity of RSCC is. The higher the sensitivity of the capillary absorptivity of ORC to the change of water-binder ratio is. The permeability model of rubber aggregate concrete established by related literature was used to fit the capillary water absorption test results of RSCC. The correlation coefficient between the test results and the fitting results was more than 0.860. At the initial stage, the capillary absorptivity of RSCC can be reflected by the magnitude of the capillary water absorption coefficient.
【作者单位】：中南大学土木工程学院;中国电建集团华东勘测设计研究院有限公司;
【基金】：国家重点基础研究发展计划(973计划)项目(2013CB036200) 国家自然科学基金资助项目(51178467)
【分类号】：TU528

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