摘要
研究C40橡胶混凝土的合理配合比,测试分析了橡胶掺量对核心混凝土的力学性能、吸水率及干缩性的影响规律,同时采用模型结合滑移试验研究分析钢管-橡胶混凝土的界面黏结性能。结果表明:橡胶掺量低于15%时可获得C40混凝土,钢管橡胶混凝土的黏结力随橡胶的掺入呈大幅下降(降幅最大达70%),并随掺量增多而不断降低;随龄期则存在明显的非线性关系。通过模型分析,判断出两种趋势的影响因素有以下:混凝土自身强度、表面孔隙、干缩,并通过试验得到验证。采用神经网络模型,对试验进行预测,与试验结果吻合良好;运用细观模型对橡胶混凝土的微观性能进行分析,得出“孔洞”与裂隙的相关结论,论证了掺入橡胶后的变化现象。
The reasonable proportion of C40 rubber concrete is studied,and the influence law of rubber content on the mechanical properties,water absorption and dry shrinkage of core concrete is tested and analyzed.At the same time,the interfacial bonding performance of steel tube rubber concrete is studied and analyzed by model combined with slip test.The results show that C40 concrete can be obtained when the content of rubber is less than 15%,and the adhesion of rubber filled steel tubular concrete decreases significantly with the addition of rubber(up to 70%),and decreases with the increase of the content.There is an obvious nonlinear relationship with age.Through the model analysis,it is judged that the influencing factors of the two trends are as follows,concrete strength,surface porosity and dry shrinkage,which are verified by experiments.The neural network model is used to predict the experiment,which is in good agreement with the experimental results.The microscopic properties of rubber concrete are analyzed by using the meso model,the relevant conclusions of“holes”and cracks are obtained,and the change phenomenon after adding rubber is demonstrated.
作者
张锦涛
何炯辉
李庚英
林炜杰
徐财华
张圣楚
ZHANG Jintao;HE Jionghui;LI Gengying;LIN Weijie;XU Caihua;ZHANG Shengchu(College of Water Conservancy and Civil Engineering,South China Agricultural University,Guangzhou 510642,China)
出处
《混凝土》
CAS
北大核心
2022年第9期11-15,19,共6页
Concrete
基金
国家自然科学基金资助项目(52178209,51878299)
国家级及省级大学生创新创业项目(S202110564059)
广东省线下一流课程建设项目(YLKC202066)
广东省质量工程教学团队项目(zlgc19013)
广东省教学改革研究项目(JG19085)
广东省课程思政教学示范团队项目(KCSZ202011)
广东大学生科技创新培育专项资金资助项目(pdjh2022b0086)。
