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Strength Characteristics of Lightweight Geopolymer
The settlement of high embankments constructed over soft compressible soil deposits is affected by the self-weight of the embankment material. In such situations, lightweight materials are preferred over the conventional earth materials. This paper delineates the geoengineering properties lightweight foamed geopolymer prepared from a mixture of fly ash and ground granulated blast furnace slag with sodium hydroxide as an activator. Aluminum powder, hydrogen peroxide and Triton X 100 are used as foaming agents. UCS tests are conducted to evaluate the mechanical properties after curing periods of 7 and 28 days. XRD and SEM tests are performed to inspect geopolymerization reactions, composition and microstructure of the products. Lowest density of 0.96 g/cc is obtained by using 0.5% H2O2 as foaming agent with unconfined compressive strength of 1.33 MPa indicating that this can be used in sub-base and subgrade of highway embankments, constructed over soft soil deposits.
Strength Characteristics of Lightweight Geopolymer
The settlement of high embankments constructed over soft compressible soil deposits is affected by the self-weight of the embankment material. In such situations, lightweight materials are preferred over the conventional earth materials. This paper delineates the geoengineering properties lightweight foamed geopolymer prepared from a mixture of fly ash and ground granulated blast furnace slag with sodium hydroxide as an activator. Aluminum powder, hydrogen peroxide and Triton X 100 are used as foaming agents. UCS tests are conducted to evaluate the mechanical properties after curing periods of 7 and 28 days. XRD and SEM tests are performed to inspect geopolymerization reactions, composition and microstructure of the products. Lowest density of 0.96 g/cc is obtained by using 0.5% H2O2 as foaming agent with unconfined compressive strength of 1.33 MPa indicating that this can be used in sub-base and subgrade of highway embankments, constructed over soft soil deposits.
Strength Characteristics of Lightweight Geopolymer
Lecture Notes in Civil Engineering
Latha Gali, Madhavi (editor) / P., Raghuveer Rao (editor) / Singh, Suresh Prasad (author) / Namdeo, Himanshu (author) / Kumar, B. Siva Manikanta (author)
2020-09-19
14 pages
Article/Chapter (Book)
Electronic Resource
English
Strength Characteristics of Lightweight Geopolymer
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