THE EFFECT OF CONCRETE COMPOSITION AND AGGREGATES PROPERTIES ON PERFORMANCE OF CONCRETE

被引:25
作者
Maciulaitis, Romualdas [1 ]
Vaiciene, Marija [1 ]
Zurauskiene, Ramune [1 ]
机构
[1] Vilnius Gediminas Tech Univ, Dept Bldg Mat, LT-10223 Vilnius, Lithuania
关键词
concrete; aggregate; expanded-clay aggregate; structural parameters; catalyst; exothermic temperature; MECHANICAL-PROPERTIES; CRACKING CATALYST; BRICK AGGREGATE; STRENGTH;
D O I
10.3846/1392-3730.2009.15.317-324
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The properties of the hardened concrete depend on the selected raw materials: size and amount of the particles of coarse aggregate, as well as on the ratio of other components. Particular countries use various methodologies for the selection of concrete composition to select the components of the concrete mixture. However, the properties of the concrete, selected by using any methodology for the selection of the concrete composition and hardened by following the defined conditions, must satisfy the values of certain necessary characteristics. The results of the implemented research indicate that the most optimal solution is to use the coarse aggregate of multi-fractional or discontinuous fractional composition. The optimal composition of the concrete must be selected to ensure that the binding material is not overdosed. Yet, all components must be selected in such a way, that the required properties of the final product are retained after concrete mixture hardens. When catalyst waste materials from the reactor of the catalytic cracking (15%) are used for the lightweight concrete, the density of the expanded-clay lightweight concrete investigated and compressive strength increases even for the higher water/cement ratio, more heat is dissipated during the hydration of the cement and this exothermic effect occurs several hours earlier.
引用
收藏
页码:317 / 324
页数:8
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