From eruption to construction - Part A: Investigating the feasibility of volcanic material as partial replacement for cement in concrete
Publicerad
Typ
Examensarbete på kandidatnivå
Bachelor Thesis
Bachelor Thesis
Program
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Reducing the CO2 emissions during cement production is of utmost importance
when it comes to combating the climate impact of the construction industry. Volcanic
material (VM) has garnered a lot of attention due to its capability to function
as a supplementary cementitious material (SCM) and its pozzolanic properties. Utilizing
VM instead of cement in concrete has shown great potential when it comes
to reducing environmental impact. This thesis examines the use of VM from Grindavik,
Iceland, as an SCM. The methodology includes testing the reactivity of the
VM through an MR3 test, measuring the compressive strength of the mortar, and
examining the crystalline structure of different hydration phases using XRD. The
mortar containing VM is compared to a reference sample containing only ordinary
Portland cement (OPC), to determine the effects of the VM on the mortar. The results
show that the VM has high reactivity in comparison to other natural pozzolans,
and mortar containing the VM has high compressive strength. Replacing 40% of
cement with VM in mortar gave the highest compressive strength, even surpassing
pure OPC. To determine if the VM is suitable as an SCM further research needs
to be done. Studying the hydration phases through a scanning electron microscopy
(SEM), measuring tensile and flexural strength, as well as durability and workability,
would provide further insight into the applicability of VM from Grindavik in
concrete. In conclusion, the findings from this study show promising results when
it comes to utilizing VM from Grindavik in concrete.
Beskrivning
Ämne/nyckelord
Supplementary Cementitious Material, SCM, Volcanic material, VM, Concrete, Compressive strength, Environmental, XRD, Reactivity, MR3