Studi karakteristik agregat kasar ringan hasil daur ulang limbah gelas plastik poli propilen (PP) dan pengaruhnya terhadap kuat tekan, kuat tarik belah dan modulus elastisitas = Lightweight coarse aggregate characteristic study from recycled poly propylene(pp) plastic cup waste and its effect to the modulus of elasticity, splitting-tensile and compressive strength of lightweight concrete - Mega Kartikawati, author (2009)