摘要
通过对再生粗骨料混凝土不同龄期的抗压试验,研究了其抗压强度-龄期发展机理;综合最终抗压强度和初始强度发展速率,采用半值强度指数建立了再生粗骨料混凝土抗压强度-龄期模型的特征方程,揭示了传统双曲线模型的缺陷,指出了理想的抗压强度-龄期模型应具备的数学性质.最后建立了新的抗压强度-龄期模型,通过试验数据拟合证明了该模型的正确性.
Mechanism for compressive strength increase of recycled coarse aggregate concrete（RCAC） was analyzed, and compressive strength tests of RCAC were conducted at 1, 2, 3, 5, 7, 14 and 28 d ages. A concept, named half-value-strength-index, for age-strength model of RCAC was proposed and employed. Combined with initial hardening rate and final strength, mathematical age-strength model is established in order to reveal deficiency of ideal age-strength model sh which can overcome the defi found between tested data a conventional hyperbolic age-strength model. Mathematical characteristic that ould have is pointed out. A new age-strength model of RCAC is presented ciency of conventional age-strength model. Finally, good agreements have been nd new model simulations.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2012年第5期633-637,共5页
Journal of Building Materials
基金
国家自然科学基金资助项目(50639050)
江苏教育厅自然科学基金资助项目(08KJB130001)
江苏省国土资源厅自然科学基金资助项目(2009D15)
教育部科学技术研究重点项目(211068)
住房与城乡建设部研究开发项目(2012-k3-4)
