Abstract
To study the key factors that affect the mechanical properties of polymer materials and explore the relationship between mineral crystal formation and strength development, fly ash (FA) polymer samples were prepared using sodium hydroxide, slag, liquid sodium silicate, and hydrated lime as activators. A change in the compressive strength was observed, and X-ray diffraction measurements were carried out to confirm the change. The effects of different types and amounts of activators on the formation and transformation of mineral crystals in FA polymer samples as well as on the development of compressive strength were studied. Moreover, the relationship between the formation and transformation of mineral crystals and the development of compressive strength was established. The results show that the strongly alkaline excitation environment established by sodium hydroxide is the prerequisite for crystal formation and development of compressive strength. Under this strongly alkaline excitation environment, slag, hydrated lime, and liquid sodium silicate can increase the amounts of calcium and silicon, which promote the formation and development of hydrated calcium silicate and hydrated calcium silicoaluminate in polymers and significantly improve the compressive strength.
Highlights
The production and application of Portland cement, a traditional building material, are affected by severe issues, including high energy consumption, high degree of pollution, and significant greenhouse gas emissions, which seriously threaten the environment on which society depends
X-ray diffraction measurements were conducted to analyze the relationship between the formation and transformation of mineral crystals and the mechanical properties of the polymer materials
Based on the results, following conclusions can be drawn: (1) The strongly alkaline excitation environment established by the addition of NH is a sufficient condition for the polymerization of polymer materials and the formation of new mineral crystals
Summary
The production and application of Portland cement, a traditional building material, are affected by severe issues, including high energy consumption, high degree of pollution, and significant greenhouse gas emissions, which seriously threaten the environment on which society depends. In this context, countries around the world are taking steps to reduce greenhouse gas emissions by limiting the production capacity of heavily polluting industries with high energy consumption in order to meet strict global agreements. China has promised to achieve goals regarding both carbon dioxide peaking and carbon neutrality. Polymer materials have gradually attracted increasing attention from the scientific community because of their numerous advantages, including a low carbon footprint, good energy-saving properties, and environmental friendliness [1]
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