Mechanical Properties of Concrete Manufactured Using Amorphous Silica and Waste Ceramics: An Experimental Investigation

Researchers are continuously studying the properties and functionality of cement and other aggregates, which are made from a combination of modern materials and different waste. In the current study, a series of experiments were conducted to compare the use of three different types of mixes. In the first mix, amorphous silica was used in place of cement; in the second, Waste Ceramics was used in place of sand; and in the third mix, both materials were combined to create concrete of M20 grade. These materials were used in place of cement and sand in varying amounts, such as 0%, 10%, 15%, 20% and 30%. The properties analyzed were workability by Slump cone and the compressive strengths after 3, 21, and 28 days. The main conclusions is the addition of amorphous silica affects consistency and setting time, as well as increasing compressive strength up to a certain limit. However, it has been observed that workability of concrete increases with the combined use of Amorphous Silica and Waste Ceramic Tiles. Compressive strength: It has been observed Maximum C3 compressive strength is found at 20% replacement of cement with Amorphous Silica after 3, 21 and 28 days of curing. Maximum compressive strength is found at 20% replacement of sand with Waste Ceramics after 3, 21 and 28 days of curing. Maximum XV compressive strength is found at 20% replacement of both cement and sand after 3, 21 and 28 days of curing. Compressive strength of concrete mix was increased slowly when both the chief ingredients were replaced by Amorphous Silica and Waste Ceramic Tiles. Split tensile strength at 3 days, 21 days and 28 days increased up to 20% and then decreases. Flexural strength at 3 days, 21 days and 28 days increased up to 20% and then decreases. 研究人员持续对水泥及其他骨料的性能与功能展开研究，此类骨料由现代材料与各类废弃物复合制备而成。本研究通过一系列对比实验，对三种不同配合比的使用效果进行评估：第一组配合比以无定形二氧化硅（Amorphous Silica）替代水泥；第二组配合比以废陶瓷（Waste Ceramics）替代砂；第三组配合比则同时使用上述两种材料，制备得到M20等级混凝土。上述替代材料的掺量分别设置为0%、10%、15%、20%与30%。本次测试分析的性能包括：采用坍落度筒（Slump cone）法测试的工作性，以及养护3天、21天、28天后的抗压强度。核心结论显示：无定形二氧化硅的掺加会影响混凝土的稠度与凝结时间，并可在一定掺量范围内提升抗压强度。但研究发现，同时掺加无定形二氧化硅与废陶瓷可提升混凝土的工作性。抗压强度方面：在养护3天、21天及28天后，以无定形二氧化硅替代水泥的配合比，其抗压强度在替代率为20%时达到峰值；以废陶瓷替代砂的配合比，其抗压强度同样在替代率为20%、养护3天、21天及28天时达到峰值；同时替代水泥与砂的配合比，其抗压强度在替代率为20%、养护3天、21天及28天时达到峰值。当同时以无定形二氧化硅与废陶瓷替代主要胶凝与骨料组分时，混凝土的抗压强度提升速率相对平缓。劈裂抗拉强度在养护3天、21天及28天时，均随替代率提升至20%时达到峰值，随后随替代率进一步升高而下降。抗弯强度在养护3天、21天及28天时，同样在替代率为20%时达到峰值，随后随替代率升高而降低。