TY  - JOUR
AV  - none
N2  - The present study aimed to investigate the effect of an expandable additive on the com-pressive strength and linear expansion of geopolymer cement, which is an alternative to ordinary Portland cement, for oil-well cementing. Fly-ash-based geopolymer cement samples, with the ad-dition of slag cement as a strength enhancer, were prepared by using an elastomeric expandable additive (R-additive), which consists of styreneâ??butadiene rubber with a specific gravity of 0.945, at concentrations of 10, 15, 20 and 25 by weight of the solid blend, and cured in a water bath at 60â?¦C and atmospheric pressure, and a curing chamber at 90â?¦C and 3000 psi, or approximately 20.68 MPa. Mixability, amount of free water and slurry density were studied, and the effects of the concentration of R-additive on the compressive strength (F) and linear expansion (â??l/l0 ) of the samples were analyzed. When cured at 60â?¦C and atmospheric pressure, the highest F of 15.01 MPa was obtained when the concentration of R-additive was 10, while the highest â??l/l0 of 0.9985 was obtained when the concentration of R-additive was 25. An increase in the curing temperature and pressure to 90â?¦C and 3000 psi (â??20.68 MPa) resulted in the reduction of F from 15.01 to 14.62 MPa and from 10.33 to 9.61 MPa, and the increase in â??l/l0 from 0.52 to 0.63, and from 0.99 to 1.32, when the concentrations of R-additive were 10 and 25, respectively. The findings suggest that the formulations adopted, which contain R-additive at concentrations ranging from 10 to 25, fulfilled the requirements of the oil and gas industry. © 2021 by the authorsLicensee MDPI, Basel, Switzerland.
N1  - cited By 1
IS  - 4
TI  - Effect of Elastomeric Expandable Additive on Compressive Strength and Linear Expansion of Fly-Ash-Based Strength-Enhanced Geopolymer Cement for Shrinkage-Resistant Oil-Well Cementing
ID  - scholars17108
Y1  - 2022///
SN  - 20763417
PB  - MDPI
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124547617&doi=10.3390%2fapp12041897&partnerID=40&md5=53f9bf8a9eee913e0e93e1ad95312b10
A1  - Rahman, S.H.A.
A1  - Farhan, S.A.
A1  - Sazali, Y.A.
A1  - Shafiee, L.H.
A1  - Husna, N.
A1  - Hamid, A.I.A.
A1  - Shafiq, N.
A1  - Zulkarnain, N.N.
A1  - Habarudin, M.F.
JF  - Applied Sciences (Switzerland)
VL  - 12
ER  -