Electrical waste, such as heavy weight waste glass, has become a global concern in terms of resource recycling. At the same time, aggregate is one of the most widely used infrastructure materials, and it is being exhausted. So, in this paper, the heavy weight waste glass is considered as aggregate due to its physical characteristics and chemical composition. From the results, when the heavy weight waste glass substitution ratio increase, the compressive strength and flexural strength decreased.

This study was aimed to investigate the tensile behaviors of PE fiber-reinforced highly ductile cementitious composites with different combinations of micro silica sand and normal sand with maximum particle size of 4.75mm. This study presented the feasibility of using normal sand instead of micro silica sand for highly ductile cementitious composites with equivalent or better uniaxial tensile performance.

In this paper, the sulfate resistance of concrete substituted the crushed heavy weight waste glass as fine aggregate are compared and evaluated. From the results, when heavy weight waste glass substituted ratio increase, the reduction rate of compressive strength is decreased. So, the sulfate resistance is improved by using heavy weight waste glass in concrete.

It is necessary to investigate the possibility of high density material as an ingredient in the manufacturing of radiation shielding material. In this study, the suitability of heavy weight waste glass as a shielding material is considered. From the results, it was found that when the heavy weight waste glass substitution ratio increases, radiation shielding performance also increase.

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.

In this paper, the sulfate resistance of concrete substituted the crushed heavy weight waste glass as fine aggregate are compared and evaluated. From the results, when heavy weight waste glass substituted ratio increase, the reduction rate of compressive strength is decreased. So, the sulfate resistance is improved by using heavy weight waste glass in concrete.

It is necessary to investigate the possibility of high density material as an ingredient in the manufacturing of radiation shielding material. In this study, the suitability of heavy weight waste glass as a shielding material is considered. From the results, it was found that when the heavy weight waste glass substitution ratio increases, radiation shielding performance also increase

The use of recycled aggregate has been highly recommended for the environmental protection of nature and absolute shortage of natural aggregate's resource, but experimental methods adequate for each recycled product have not been established and also the data have not been enough to ensure the control of concrete quality. Thus, this study has an aim of applying high volume of recycled aggregate to the fabrication of concrete by investigating that production methods of recycled aggregate and its replacement ratio have effects on the performance of concrete.

This study was examined the variation of unit water content and fine aggregate ratio in concrete for nuclear power structure using a large amoung of crushed sand.

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.

Along with the increased display devices, the supply for LCD waste glass has rapidly increased. However, there is a problem for recycling. In this study, the possibility of using LCD waste glass as a substitutive material of fine aggregate is determined and compared from the test of the compressive strength and split tensile strength. Finally, it is possible to confirm the results of the failure aspect and analysis of this test.

In order to measure the rheological behavior of precast concrete with high volume of recycled fine aggregate, the replacement of natural fine aggregate by recycled one was carried out in dry-mix process. As results of that, it was found that as the replacement increases, strength and performance of concrete become decreased but may be recoverable by proper selection and dosage of constituents.

In this paper, the heavy metal leaching of mortar substituted the crushed waste glass as fine aggregate are evaluated. From the results, when the heavy weight waste glass substitution ratio increase, leching quantities of heavy metal is increased. Therefore, it is needed that the characteristics of heavy metal leching according to waste glass substitution ratio in mortar specimens.

This study evaluates the material performance of slump value and compressive strength of the concrete which was made by recycled sand and blast furnace slag powder(BFSP). The main variables are replacement ratio of BFSP. As a result, it was evaluated that more detailed evaluation is needed in long-term strength development and the compensation of slump value to the replacement ratio of BFSP.

Effects of recycled fine aggregate on the behavior of cement-based concrete were evaluated with different compressive strengths through experiments. It can be observed that recycled fine aggregate can be useful to fabricate precast concrete products in terms of having of concrete strength equivalent to natural aggregate.

In order to identify the nature of recycled fine aggregates, an experiment was conducted by mixing recycled fine aggregates. Then, comparative analysis was carried out throughout compressive strengths obtained from steam curing and water curing methods. The concrete mixed with recycled fine aggregate has low strength gain compared to the conventional concrete. But in case that concrete produced in dry process is applied to precast concrete prod

This study was intended to investigate the effect of sand particle size on the flowability and strength of UHPC. The experimental results indicated that the sand with the particle size of 0.45~0.89 mm led to the best performance in those properties of UHPC.

This paper was examined the durability properties of concrete using rapid cooling slag as fine aggregate for concrete. The results of experiments, concrete using rapid cooling slag showed that durability properties was equal to concrete using normal fine aggregate.

급격한 산업화와 삶의 질의 변화로 인해 생산된 고밀도 폐유리의 양은 꾸준히 증가하고 있으나 대부분 재활용되지 못하고 있다. 특히 고밀도 폐유리의 경우 불법적으로 처리되거나 매립되는 실정이다. 한편, 원전구조물의 안전성 확보를 위해 차폐 성능이 우수한 재료가 사회적으로 요구되고 있다. 콘크리트는 가장 많이 사용되고 있는 건설재료이며, 많은 양의 자원들이 콘크리트를 생산하기 위해 사용되고 있다. 따라서 고밀도 폐유리를 차폐 콘크리트 재료로 재활용할 수 있는 방안에 대한 연구가 요구되어진다. 본 연구에서는 고밀도 폐유리를 차폐 콘크리트 잔골재로의 적용가능성을 평가하였다. 결과에 따르면, 폐유리를 혼입한 모르타르의 경우, 일반 모르타르에 비하여 단위용적질량이 증가하여 차폐 성능 개선이 가능할 것으로 판단된다. 폐유리 혼입에 의해 강도는 감소하는 것으로 나타났으며, 세척의 경우보다 비세척의 경우에 강도 발현이 유리한 것으로 나타났다.

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.