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Mechanical Characteristics of Recycled PET Polymer Concrete with Demolished Concrete Aggregates

PET와 재생골재를 이용한 폴리머콘크리트의 역학적 특성

  • Published : 2005.06.01

Abstract

In this paper, fundamental properties of Polymer Concrete(PC), made from unsaturated polyester resin based on recycled PET and recycled aggregate were investigated. Mechanical properties include strength, modulus of elasticity, and chemical resistance. Resins based on recycled PET and recycled aggregate offer the possibility of low source cost for forming useful products, and would also help alleviate an environmental problem and save energy. The results of test for resin contents and recycled aggregate ratio we, first, the strength of Polymer Concrete made with resin based on recycled PET and recycled aggregate increases with resin contents relatively, however beyond a certain resin contents the strength does not change appreciably, Second, the relationship between the compressive strength and recycled aggregate ratio at resin $9\%$ has a close correlation linearly whereas there is no correlation between the compressive strength and the flexural strength of RPC with recycled aggregate ratio. Third, the effect of acid resistance at resin $9\%$ was found to be nearly unaffected by HCI, whereas the PC with $100\%$ recycled aggregate showed poor acid resistance. Unlike acid, alkali nearly does not seem to attack the RPC as is evident from the weight change and compressive strength. And last, In case of stress-strain curve of polymer concrete with $100\%$ of natural aggregate and $100\%$ recycled aggregate it is observed the exceptional behavior resulting in different failure mechanisms of the material under compression.

천연 건설자원이 고갈되어감에 따라, 심각한 환경오염을 일으키고 있는 각종 산업폐기물의 재활용을 통해 새로운 건설소재를 개발하기 위하여, 폐플라스틱과 폐 콘크리트를 재활용한 폴리머콘크리트의 역학적 특성을 분석하였다. 본 연구에서는 폐 PET를 재생한 불포화 폴리에스테르 수지를 재생골재와 결합시켜, 재생골재 및 수지변화량에 따른 역학적 특성과 내화학성 실험을 실시하였으며 실험결과, 재생수지 및 골재를 사용한 폴리머콘크리트(RPC)의 강도는 수지의 함량이 증가함에 따라 차츰 증가하는 추세를 보였다. 하지만 어느 수지량의 한계점 (대략 $13{\~}17\%$)에선 더 이상의 강도증가는 나타내지 않고 있음을 확인할 수 있었다 또한 재생골재 함량이 증가할수록 강도와 탄성계수는 감소하였으나 수지량 $17\%$에서는 이러한 현상이 나타나지 않았다. 선형대수회귀 분석을 통해 수지량 $9\%$일 때의 압축강도와 휨, 할렬 인장강도의 상관관계를 확인한 결과 높은 신뢰도를 보임을 알 수 있었다. 하지만 수지량이 증가함에 따라 뚜렷한 상관관계가 나타나지 않는 경향을 나타내었다. 재생골재를 사용한 폴리머콘크리트의 내화학성에 따른 중량변화와 강도실험은 비교적 산과 염에 강한 특성을 나타내었다. 그리고 염산 $30\%$의 수용액에선 알칼리수용액 $40\%$ 보다는 강한 저항성을 나타내었음을 압축강도 및 중량변화를 통해 확인할 수 있었다.

Keywords

References

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