Lightweight cement-based materials

Oil-well lightweight cement slurry for improving compressive strength and hydration rate in low-temperature conditions

“…In this case, dispersants reduce the cement viscosity and keep the water amount as needed. For all cement classes, the API/ISO (international organization for standardization) proposes adding 5.3 percent more water by weight of cement (BWOC) for each 1 percent bentonite [30]; however, testing is required to establish the ideal water content. It is true that with bentonite concentration, the density of cement slurry decreases, and its yield increases.…”

Performance of lightweight cement pastes under CO2 storage conditions

“…This research focuses on studying lightened cement paste used for well cementing. The cement is lightened with hollow glass microspheres (HGMS) to obtain a lightweight cement paste, which is useful for injection wells in low-strength rock formations [12]. HGMS are widely used for oil well cementing with the ability to reduce the specific weight of the cement paste without severely affecting its hardened properties [12].…”

“…The cement is lightened with hollow glass microspheres (HGMS) to obtain a lightweight cement paste, which is useful for injection wells in low-strength rock formations [12]. HGMS are widely used for oil well cementing with the ability to reduce the specific weight of the cement paste without severely affecting its hardened properties [12]. In previous research, the chemical interaction between HGMS and cement hydration product was already proven [13].…”