Methods of cementing subterranean zones using cement compositions containing
biogradable dispersants are provided. The methods are basically comprised of the
steps of preparing a hydraulic cement, a biodegradable dispersant comprised of
polyaspartic acid containing side chains formed by reacting one or more side chain
chemicals with said polyaspartic acid and sufficient water to form a pumpable slurry,
placing the cement composition into a zone to be cemented and allowing the cement
composition to set into an impermeable solid mass therein.