Mardiyanto, Rico (2024) Pengaruh Penggunaan Graphene Oxide Pada Thickening Time, Compressive Strength, Shear Bond Strength Dan Microstructure Semen Pemboran. Other thesis, Universitas Islam Riau.

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Abstract

Basically, some drilling wells have a deep depth, so this needs to be paid attention to because cement has the property of drying quickly. The distribution of pores that occur in drilling cement results in low drilling cement strength. So, it is necessary to know the interactions between particles in the form of characterizing the microstructure of drilling cement. Additives that are often used as retarders are: calcium lignosulfonate and carbonxymethyl hydroxythyl cellulose (CMHEC). Additive nanoparticles in the form of graphene oxide are an alternative that can slow down the cement drying process and strengthen the strength of the cement. Graphene oxide has the advantage that it can be dispersed with water (hydrophilic) so that it can bond with cement slurry. This research is to determine the effect of graphene oxide on cement slurry in thickening time, compressive strength, shear bond strength and microstructure tests. This research is experimental by testing thickening time using an atmospheric consistometer, compressive strength and shear bond strength using a hydraulic press. Meanwhile, microstructure testing uses SEM and XRD. The graphene oxide that will be tested on drilling cement is carried out based on varying concentrations, namely 0.01%, 0.02%, 0.03%, 0.04%, 0.05% and 0.06%. GO concentration influences the values of thickening time, compressive strength, shear bond strength and microstructure drilling cement. The optimum thickening time value obtained from adding a concentration of 0.06% GO is 155.52 minutes. The optimum compressive strength and shear bond strength values occur with the addition of a concentration of 0.05% GO, namely 4754,705 psi and 901,199 psi. The cement microstructure results with the addition of a concentration of 0.05% GO were able to reduce the formation of microcracks to 1.005 ?m - 0.447 ?m and had 50.17% oxygen elements and 20.78% carbon elements. The addition of 0.05% GO additive causes the emergence of a new mineral, namely plazolite, which produces a dense and strong cement matrix resulting in high strength.

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