grade of concrete meaning in English
混凝土牌号
Examples
- Strength classes grades of concrete
混凝土强度等级29 - Sem has been used to analyze the microcosmic morphology of cement - rock , xrd to its phase , and imp to the porosity structure . the grading and distribution of the porosity has also been analyzed . the grading of concrete aggregates and porosity have been studied by fractal geometry theory
结石及纯水泥浆结石等进行了微观分析研究，用sem （扫描电镜）研究结石的微观形貌，用xrd （衍射）分析结石的物相，用imp （汞压）法测定结石的孔隙结构，并对结石孔级配及分布进行了统计分析，用分形理论对混凝土细骨料颗粒级配进行了研究探讨。 - After the evaluation of the three parameters in the proposed creep model , which is based on the large numbers of experimental measurements of concrete creep , the influential regularities of concrete filled steel tube columns under long - term loading are investigated . by dispersing time , the method of tangent modulus is adopted to study the relation of creep strain and load time . in the end , this paper took cft specimens with representative geometry and sectional dimensions as examples and adopted the proposed method as an approach to investigate the influencing regularities of many factors , which include the ratio of long - term load to strength , the slenderness ratio , the eccentricity ratio , and the intensity grade of concrete , on cft structures
在对钢管混凝土构件长期荷载效应的分析中，本文基于三维粘弹性理论，采用三参数粘弹性模型，提出了核心混凝土徐变的三维有限元分析理论，在总结过去大量关于混凝土徐变试验实测结果的基础上拟合了模型中的三个参数，并成功将其应用于钢管混凝土徐变的三维分析计算中，得到徐变与持荷时间的关系，以典型截面形式的圆钢管混凝土轴压、偏压构件为例，对轴压比、长细比、含钢率、偏心率以及核心混凝土等级分别进行了大量的参数分析和实验对比研究，结果表明二者符合较好。 - In this thesis , the experimental research of the behavior of high strength concrete axial compression columns and eccentric compression columns under non - uniform temperature field are conducted . from the experimental analysis , the variational regularity of ultimate load capacity and deformation of high strength concrete compression - flexure members under non - uniform temperature field is obtained . the influences of different factors including temperature , stirrup contents , strength grade of concrete , pre - loading level , eccentricity and different loading - temperature paths to refractory capability of members are investigated
文中还对高强混凝土轴心受压柱和偏心受压柱在不均匀温度场下的力学性能进行了试验研究，通过试验分析了高强混凝土压弯构件极限承载力和变形在不均匀温度场下的变化规律，考察了不同升温温度、箍筋用量、混凝土强度等级、预加荷载水平、荷载偏心以及荷载?温度途径等对构件耐火性能的影响，通过试验量测，得到了构件的截面温度场。