Metakaolin based geopolymers as soil stabilizers

Conference Dates

May 27-June 1, 2018


In many kinds of engineering constructions, wind-swept soils and soft weak soils are often stabilized and strengthened with ordinary Portland cement (OPC) and lime, to increase soil strength and durability. Furthermore, such soil stabilizing can also prevent erosion and dust generation. However, OPC is known to leave an enormous environmental footprint on planet Earth as its production processes are significant energy consumers with high CO2 emissions. Therefore, the development of a novel generation of cements with high durability and environmental sustainability is essential. One of these novel binders is the alkali-activated binder based on aluminosilicates materials as metakaolin or industrials by-products such as fly ash or slags, commonly referred to as geopolymer. It has been found that geopolymers can exhibit high compressive strength and higher chemical and thermal resistance than cement-based materials [1]. Therefore, due to their high strength, low cost, low energy consumption and CO2 emissions, geopolymers offers a promising alternative to OPC [2]. Geopolymers also exhibit excellent adhesion to aggregates [3], therefore it is reasonable to assume that they can serve as an effective soil stabilizer.

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