고밀도 폐유리가 콘크리트를 포함하는 건설 재료로 사용 가능함이 밝혀짐에 따라 본 연구에서는 고밀도 폐유리를 잔골재로 적용한 RC 부재의 구조적 거동을 평가하고자 휨거동 실험을 수행하고 그 결과를 비선형 유한요소해석 결과와 비교 검토하였다. 그 결과, 고밀도 폐유 리를 잔골재로 사용하게 되면, 균열 개수가 감소하고 균열 간격 및 압괴 면적이 증가하였다. 또한, 고밀도 폐유리를 잔골재로 대체한 부재는 높은 처짐 단계에서 연성이 감소되었다. 이러한 이유로 천연골재를 사용한 부재와 동일한 방법의 해석 기법은 고밀도 폐유리를 잔골재로 대체한 부재의 휨거동에 대한 초기강성, 항복하중 및 최대하중을 제대로 예측하지 못하는 것으로 나타났으나, 압괴 진전에 따른 중립축 깊이가 감소하는 것을 해석적으로 구현하게 되면, 비선형 유한요소 해석 결과가 실험결과를 비교적 잘 예측하는 것으로 나타났다.

In this paper, the flexural behavior of RC member recycled heavy weight waste glass as fine aggregate was evaluated by finite element analysis. From the results, yield point and maximum load decreased with decreasing concrete strength and elastic modulus. Also, the finite element analysis program does not reflect the ductility loss of RC members using heavy weight waste glass as fine aggregate.

As the industrialization is rapidly growing, the quantities of industrial waste glass have been quickly increased. However the most of them are not recycled. Therefore, it is needed to investigate the possibility of industrial waste glass as concrete material ingredient. In this paper, it is compared and evaluated that the characteristics of freeze-thaw resistance according to industrial waste glass substitution ratio in concrete specimens. From the results, the weight change was not affected by the waste glass substitution ratio. And, the relative dynamic modulus of elasticity was increased slightly with the waste glass substitution ratio. The relative dynamic modulus of elasticity was above 80% up to 300cycles in all of the mixes.

Concrete behaves as a brittle material with low tensile strain capacity. By adding fibers, the cracking in concrete matrix is controlled, and the mechanical properties are improved. In this study, the mechanical properties of fiber reinforced concrete are compared with fiber type and fiber volume fraction. From the results, the fiber mixed in concrete must be at least 0.5% regardless fiber type, in order to ensure the compressive and flexural strength equivalent or higher than OPC.

In this paper, the material characteristics of green slope soil for application to vegetation shotcrete using mineral additive are evaluated. From the results, when the compaction level increase, soil hardness and soil strength are increased. However, the cohesion and angle of internal friction are not significantly affected by mix proportions.

Concrete behaves as a brittle material with low tensile strain capacity. By adding fibers, the cracking in concrete matrix is controlled, and the durability is improved. In this study, the microstructure and Chloride diffusion resistance of fiber reinforced concrete are compared with fiber type and fiber volume fraction. From the results, the fiber mixed in concrete must be at least 0.5% regardless fiber type, in order to ensure the chloride diffusion coefficient higher than OPC at 91days. However, the micro structure distribution is affected with fiber volume fraction and fiber type at range 10~100nm.

Concrete shrinkage is happened due to the cement hydration and water evaporation from early ages, and it induces crack of concrete. In this study, the crack resistance of fiber reinforced concrete was compared with fiber type and fiber volume fraction. From the results, cracking is delayed when the volume fraction is increased. And, crack resistance is improved regardless of fiber type.

As the industrialization is rapidly growing and the quantities of heavy weight waste glass have been quickly increased but the most of them are not recycled. The heavy weight waste glass have been treated by illegal dumping or being buried in landfills. And, it is caused some problem such as the environmental pollution. So, it is needed to investigate the possibility of recycling of heavy weight waste glass as concrete material ingredient. In this paper, the mechanical properties of mortar substituted the crushed waste glass as fine aggregate are evaluated. From the results, when waste glass substitution ratio increase, fluidity and specific gravity increase. However, the compressive strength and flexural strength decrease. So, the mechanical properties of mortar are significantly affected by waste glass substitution ratio.

Dry shrinkage of concrete is occurred due to the cement hydration and water evaporation from early ages, and it induces crack of concrete. In this study, shrinkage according to sand-aggregate and water-binder ratio were compared with the existing prediction models. From the results, when sand-aggregate ratio and unit water content increase, dry shrinkage of concrete increase. But, it showed that existing prediction models do not reflect shrinkage of concrete, well.

In this paper, the length change of mortar substituted the crushed heavy weight waste glass as fine aggregate are evaluated. From the results, when waste glass substitution ratio increase, ASR expansion increase. However, the dry shrinkage decrease. So, the length change of mortar are significantly affected by waste glass substitution ratio.

Many researches are conducted on the concrete pannel to improve the capacity. Up to now, however，the surface glossing of concrete pannel is rarely executed. So it is needed to investigate the surface glossing of concrete pannel. In this paper, the mechanical properties and surface condition of the concrete pannel was compared with water content and aggregate ratio. From the results, when aggregate ratio increase, compressive strength and flexural strength decrease. And, the surface glossing of Non AE concrete pannel was better than that of AE concrete pannel.