## 1 Introduction  
Improper disposal of polymeric materials causes the generation and release of undesirable pollutants into the environment. Polymers in the form of plastics are generally non-biodegradable and their waste causes environmental hazards [1]. The non-biodegradable plastics continually fill water and soil space by landfill [2]. The increasing problem can be alleviated if another means of disposal other than landfills can be found. After degrading, the plastics release oxides of carbon, nitrogen, and Sulphur, which are harmful to both humans and the environment when burnt [3, 4]. The increase in demand and the environmental footprint of plastics for households during the COVID-19 pandemic response is on the increase [5]. At least a sachet of pure water per day is consumed by 70 percent of Nigerian adults, resulting in about 50 to 60 million used water-sachets being disposed of daily in Nigeria [6]. To solve this problem [PERSON] et al. (2015) added low-density polyethylene (LDPE) to laterite soil to form bricks and observed high compressive strength [7]. Agglutinated low-density polyethylene (LDPE), crushed polyethylene terephthalate (PET), and rubber from useless tires were used for hydraulic dam repairs in concrete. Gains in mechanical properties with LDPE addition were better than PET and rubber [8]. Geopolymers are a new class of inorganic polymer materials used for fiber-reinforced composites, replacement of Ordinary Portland Cement (OPC) and waste encapsulation [9, 10] and can have ceramic properties [11]. Geopolymers are generally composed of aluminiosilicates from materials such as clay [12], metaclay [13], kaolin, metakaolin [14] and fly ash [15], usually in the presence of an alkaline solution [16], and cured at low temperatures lower than 100 \({}^{\circ}\)C [17; 18; 19; 20]. Geopolymers cured at temperatures greater than 80 \({}^{\circ}\)C are more porous than those cured at lower temperatures [21; 22]. Geopolymer alkali-activation of metakaolin studies has increased in recent decades. This is partly due to the lower CO\({}_{2}\) emission during geopolymerization processes compared to the use of Portland Cement [23; 24]. Sodium hydroxide (NaOH) and potassium hydroxide (KOH) are alkali-activation solutions commonly used for geopolymerization processes at low temperatures [25; 26; 27; 28]. Sodium hydroxide has been observed to improve the geopolymerization process more than potassium hydroxide due to its smaller sodium ions [29]. The addition of sodium hydroxide to sodium silicate increases the reaction rate in the geopolymer process [30; 31]. [PERSON] et al. (2014) observed that the use of metakaolin rather than kaolinite significantly increases the geopolymer strength [32]. Calcined source material, such as metakaolin or metaclay, showed higher compressive strength compared to the non-calined sources, such as kaolin or clay, due to increased geopolymerization reaction rates [33]. Geopolymer ceramics generally have a compressive strength of about 45 MPa [34]. The compressive strength of geopolymer ceramics can be improved by using particulates, fibres, granulates, organic polymers or powder for reinforcement [20; 35; 36; 37]. Compressive strength also depends on the geopolymerization reaction between silicates and aluminates (Si/Al), and the metal oxides such as CaO and Fe\({}_{2}\)O\({}_{3}\) present in the aluminosilicate source material. The increase in CaO percentage increases settling time, while SiO\({}_{2}\) percent higher than 45%, Al\({}_{2}\)O\({}_{3}\) percentage higher than 22%, and increase in Fe\({}_{2}\)O\({}_{3}\) percentage increases the compressive strength [17; 38; 39]. Most studies have been done on polymer waste as a reinforcement for concrete [40; 41]. Few studies on the effect of LDPE geopolymer ceramics have been reported. In this work, low-density polyethylene waste was pulverized and mixed with metaclay (MC) and metakaolin (MK) to produce geopolymer ceramics. The compressive strength and water absorption were evaluated.